(Faculty Division of Engineering Research Group of Engineering)｜Researchers' Profile Teacher performance management system

Name

Author

Position

Affiliation

Research Areas

YAMAMOTO Kentaro

Faculty Division of Engineering Research Group of Engineering

Associate Professor

Last Updated :2025/06/21

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Profile Information

Name (Japanese)
Yamamoto
Name (Kana)
Kentaro

Research Interests

固体イオニクス

無機材料

二次電池

電気化学

Research Areas

Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Electronic devices and equipment

Nanotechnology/Materials, Structural and functional materials

Nanotechnology/Materials, Energy chemistry

Nanotechnology/Materials, Inorganic compounds/materials chemistry

Research History

Jul. 2021 - Mar. 2022, 京都大学大学院人間・環境学研究科, 特定准教授

Apr. 2016 - Jun. 2021, 京都大学大学院, 人間・環境学研究科, 特定助教

Apr. 2015 - Mar. 2016, Kyushu University, 稲盛フロンティア研究センター, 特任助教

Professional Memberships

THE CARBON SOCIETY OF JAPAN

日本ポーラログラフ学会

固体イオニクス学会

THE ELECTROCHEMICAL SOCIETY OF JAPAN

The Electrochemical Society

電池技術委員会

Media Coverage

京都大学开发出用于全固态氟化物离子二次电池的超高容量正极材料，通过分子氮实现高能量密度, 客観日本 (https://www.keguanjp.com/kgjp_keji/kgjp_kj_new/pt20250217000013.html), Feb. 2025, Internet

Ultrahigh-capacity cathode material for all-solid-state fluoride-ion secondary batteries developed by Kyoto University, Other than myself, Science Japan (https://sj.jst.go.jp/news/202502/n0221-02k.html), Feb. 2025, Internet

超高容量を実現全固体フッ化物イオン二次電池用正極材料, Other than myself, EE Times Japan (https://eetimes.itmedia.co.jp/ee/articles/2502/04/news070.html), Feb. 2025, Internet

京大など、全固体フッ化物イオン二次電池用の新規高容量インターカレーション正極材料の開発に成功, Other than myself, 日本経済新聞（紙面・Web掲載）https://www.nikkei.com/article/DGXZRSP685179_V10C25A1000000/, Jan. 2025, Paper

全固体フッ化物イオン二次電池用の超高容量正極材料の開発ー分子状窒素で高エネルギー密度を実現ー, Myself, 京都大学ホームページプレスリリース, Jan. 2025, Internet

リチウムイオン電池超え、次世代二次電池の正極材料＝京大など, MIT Technology Review (https://www.technologyreview.jp/n/2024/01/25/327952/), Jan. 2024, Internet

酸素分子結合を用いた酸フッ化物正極の開発―全固体フッ化物イオン二次電池への応用―, Myself, 京都大学ホームページプレスリリース, Jan. 2024, Internet

■Ⅱ．研究活動実績

Published Papers

Refereed, Advanced Energy Materials, Wiley, Ultra‐High‐Capacity of Earth‐Abundant Cathodes Enabled by Excess Fluoride‐Ion Insertion/Extraction, Yanchang Wang; Kentaro Yamamoto; Yuki Sakaguchi; Jun Miyawaki; Toshiyuki Matsunaga; Datong Zhang; Hisao Kiuchi; Zulai Cao; Koji Nakanishi; Toshiki Watanabe; Neha Thakur; Mukesh Kumar; Hidenori Miki; Hideki Iba; Kazuhiko Maeda; Yoshihisa Harada; Hiroshi Kageyama; Yoshiharu Uchimoto, Abstract

All‐solid‐state fluoride‐ion batteries (FIBs) are highly prospective candidates for next‐generation batteries due to their superior energy density and safety to lithium‐ion batteries (LIBs). Nevertheless, the full potential of FIBs remains unrealized, as practical cathode materials remain elusive. Here, a perovskite oxyfluoride SrFeO₂F_x is reported to exhibit topotactic F⁻ (de)intercalation and provide a large capacity of 350 mAh g⁻¹ (1843 mAh cm⁻³) with negligibly small volume expansion (≈0.5%). The large capacity is attributed to excess F⁻ (de)intercalation of ≈2.3 mol in SrFeO₂F_x with Fe²⁺/Fe³⁺ redox and oxygen redox. Furthermore, Sr‐substituted CaFeO₂F_x (Ca_0.8Sr_0.2FeO₂F_x) has the highest capacity of 580 mAh g⁻¹ (2595 mAh cm⁻³) among cathode materials using the topotactic ion (de)intercalation, including LIBs. For the first time, the possibility is presented that the utilization of ultimate anion redox associated with the ion (de)intercalation to achieve specific capacities surpassing current active materials by over twofold., 17 Jun. 2025, Scientific journal, 10.1002/aenm.202406131
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Refereed, Journal of Power Sources, Elsevier BV, Hierarchical reaction analysis of the effect of high-temperature storage on the electrode characteristics and safety of high-nickel cathodes, Xian Shi; Toshiki Watanabe; Kentaro Yamamoto; Mukesh Kumar; Neha Thakur; Toshiyuki Matsunaga; Hideki Iba; Masayuki Nagamine; Kiyoshi Kanamura; Yoshiharu Uchimoto, Mar. 2025, 631, 236191, 236191, Scientific journal, 10.1016/j.jpowsour.2025.236191
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Refereed, Batteries & Supercaps, Wiley, Unraveling the Degradation Mechanism of LiNbO₃‐Coated NCM Cathode at High Potential in All‐Solid‐State Batteries Using 10 K Extended X‐ray Absorption Fine Structure Analysis, Yong Jun Park; Yixiao Su; Kentaro Yamamoto; Toshiki Watanabe; Neha Thakur; Mukesh Kumar; Toshiyuki Matsunaga; Yoshiharu Uchimoto, Abstract

All solid‐state batteries (ASSBs) utilizing sulfide‐based solid electrolytes hold promise for enhancing battery energy density while mitigating safety concerns, thus meeting the stringent requirements for electric vehicle applications. For the practical application of ASSBs, it is important to stabilize the interface between the solid electrolyte and the cathode. Although cathode coated with a thin layer of LiNbO₃ provide higher interface stability, which significantly improves charge‐discharge and cycle performance, degradation at high potentials has also been noted. In this study, we focused on the degradation mechanism of LiNbO₃‐coated LiNi_0.5Co_0.2Mn_0.3O₂ cathode active materials at high potentials by using three electrode system for ASSBs, which allows separating the impedance measurement of the interface between cathode and solid electrolyte. We performed X‐ray absorption spectroscopy (XAS) measurements at low temperature (10 K) to analyze the local structure around Nb and correlate these findings with impedance measurements. Our results indicate that the impedance of LiNbO₃ increased rapidly due to the oxygen desorption reaction at high potentials. This study aims to elucidate the dynamic changes and degradation mechanism of LiNbO₃‐coated LiNi_0.5Co_0.2Mn_0.3O₂ in ASSBs and provide new ideas for the design of interfacial coating materials., 05 Feb. 2025, Scientific journal, 10.1002/batt.202400697
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Refereed, Journal of the American Chemical Society, American Chemical Society (ACS), Cathode Design Based on Nitrogen Redox and Linear Coordination of Cu Center for All-Solid-State Fluoride-Ion Batteries, Datong Zhang; Kentaro Yamamoto; Zulai Cao; Yanchang Wang; Zhuoyan Zhong; Hisao Kiuchi; Toshiki Watanabe; Toshiyuki Matsunaga; Koji Nakanishi; Hidenori Miki; Hideki Iba; Yoshihisa Harada; Koji Amezawa; Kazuhiko Maeda; Hiroshi Kageyama; Yoshiharu Uchimoto, 13 Jan. 2025, Scientific journal, 10.1021/jacs.4c12391
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Refereed, Journal of The Electrochemical Society, The Electrochemical Society, Hierarchical Reactions Involving Dynamic Structural Changes in Lithium-Ion Batteries during Overcharge Using Advanced Analytical Techniques, Xian Shi; Toshiki Watanabe; Kentaro Yamamoto; Mukesh Kumar; Neha Thakur; Toshiyuki Matsunaga; Masanori Fujii; Hajime Kinoshita; Hideki Iba; Masayuki Nagamine; Kiyoshi Kanamura; Yoshiharu Uchimoto, High-Ni cathode materials are promising for lithium-ion batteries compared to conventional cathode materials because of relatively high energy density and low cost. High-Ni cathodes are inherently thermally unstable, and when used in large scale batteries, they can cause serious problems such as thermal runaway and associated destruction of the internal structure. For practical use, it is necessary to understand the internal phenomena when they are incorporated into large scale batteries. We examined the stacked electrode structural change inside pouch cells with approximately 1 Ah capacity during over charging, which includes LiNi_0.8Mn_0.1Co_0.1O₂, LiNi_0.6Mn_0.2Co_0.2O₂, and LiCoO₂ athodes, by using synchrotron-based operando X-ray radiography. In addition, the bulk crystalline, electronic, and local structures of these materials as well as surface electronic structure changes during overcharging were also analyzed. We found that as the amount of Ni-content in the cathodes increase, destabilization of surface oxygen and structural phase transitions occur at smaller state of charge, leading to faster and more severe collapse of the stacked electrode structure inside the pouch cells. This finding of a relationship of hierarchical structural changes from the cathode surface to the pouch cell is useful for the safe use of lithium-ion batteries with high energy density containing high-Ni cathodes., 03 Dec. 2024, 171, 12, 120504, 120504, Scientific journal, 10.1149/1945-7111/ad9990
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Refereed, ACS Applied Energy Materials, American Chemical Society (ACS), Phase-Transition-Induced Crack Formation in LiNi_0.8Mn_0.1Co_0.1O₂ Cathode Materials: A Comparative Study of Single-Crystalline and Polycrystalline Morphologies Using Operando X-ray CT, Xian Shi; Toshiki Watanabe; Kentaro Yamamoto; Mukesh Kumar; Neha Thakur; Toshiyuki Matsunaga; Masanori Fujii; Hajime Kinoshita; Hideki Iba; Masayuki Nagamine; Kiyoshi Kanamura; Yoshiharu Uchimoto, 21 Nov. 2024, Scientific journal, 10.1021/acsaem.4c02340
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Refereed, Inorganic Chemistry, American Chemical Society (ACS), Fluoride Ion Storage and Conduction Mechanism in Fluoride Ion Battery Positive Electrode, Ruddlesden–Popper-Type Layered Perovskite La_1.2Sr_1.8Mn₂O₇ Crystal, Hidenori Miki; Toshiyuki Matsunaga; Zhuoran Li; Zulai Cao; Kentaro Yamamoto; Mukesh Kumar; Neha Thakur; Toshiki Watanabe; Hideki Iba; Shintaro Kobayashi; Shogo Kawaguchi; Kazutaka Ikeda; Masato Hagihala; Takashi Kamiyama; Akihide Kuwabara; Hiroshi Kageyama; Kazuhiko Maeda; Yoshiharu Uchimoto, 07 Oct. 2024, Scientific journal, 10.1021/acs.inorgchem.4c02341
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Refereed, ACS Applied Energy Materials, American Chemical Society (ACS), Reversible Fluoride-Ion (De)Intercalation of CuLaO₂ Cathodes with Crystalline/Amorphous Phase Transition Involving Multi-Electron Reaction, Zulai Cao; Kentaro Yamamoto; Toshiyuki Matsunaga; Mukesh Kumar; Neha Thakur; Toshiki Watanabe; Koji Nakanishi; Hidenori Miki; Hideki Iba; Koji Amezawa; Hiroshi Kageyama; Yoshiharu Uchimoto, 30 Jul. 2024, 7, 15, 6640, 6648, Scientific journal, 10.1021/acsaem.4c01271
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Refereed, Journal of Solid State Electrochemistry, Springer Science and Business Media LLC, Structure and particle surface analysis of Li2S–P2S5–LiI-type solid electrolytes synthesized by liquid-phase shaking, Kazuhiro Hikima; Kaito Ogawa; Radian Febi Indrawan; Hirofumi Tsukasaki; Satoshi Hiroi; Koji Ohara; Kazutaka Ikeda; Toshiki Watanabe; Toshiyuki Matsunaga; Kentaro Yamamoto; Shigeo Mori; Yoshiharu Uchimoto; Atsunori Matsuda, Abstract

Li₂S–P₂S₅–LiI-type solid electrolytes, such as Li₄PS₄I, Li₇P₂S₈I, and Li₁₀P₃S₁₂I, are promising candidates for anode layers in all-solid-state batteries because of their high ionic conductivity and stability toward Li anodes. However, few studies have been conducted on their detailed local structure and particle surface state. In this study, Li₇P₂S₈I (Li₂S: P₂S₅:LiI = 3:1:1) solid electrolytes as the chemical composition were synthesized by mechanical milling and liquid-phase shaking, and their local structures were analyzed by transmission electron microscopy. The particle surface states were analyzed by X-ray photoelectron spectroscopy, high-energy X-ray scattering measurements, and neutron total scattering experiments. The results showed that Li₇P₂S₈I solid electrolytes are composed of nanocrystals, such as Li₄PS₄I, LiI, Li₁₀P₃S₁₂I and an amorphous area as the main region, indicating that the crystalline components alone do not form ionic conductive pathways, with both the amorphous and crystalline regions contributing to the high ionic conductivity. Moreover, the ionic conductivity of the crystalline/amorphous interface of the glass-ceramic was higher than that of the Li₂S–P₂S₅–LiI glass. Finally, an organic-solvent-derived stable surface layer, which was detected in the liquid-phase shaking sample, served as one of the factors that contributed to its high stability (which surpassed that of the mechanically milled sample) toward lithium anodes. We expect these findings to enable the effective harnessing of particle surface states to develop enhanced sulfide solid electrolytes., 13 May 2024, Scientific journal, 10.1007/s10008-024-05898-3
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Refereed, Solid State Ionics, Elsevier BV, Accelerated fluoride-ion intercalation/deintercalation in a layered-perovskite cathode by controlling the interlayer distance for fluoride-ion batteries, Hidenori Miki; Kentaro Yamamoto; Cao Shuo; Toshiyuki Matsunaga; Mukesh Kumar; Neha Thakur; Yuki Sakaguchi; Toshiki Watanabe; Hideki Iba; Hiroshi Kageyama; Yoshiharu Uchimoto, Mar. 2024, 406, 116480, 116480, Scientific journal, 10.1016/j.ssi.2024.116480
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Refereed, Solid State Ionics, Elsevier BV, Transient phase change of Ruddlesden-Popper type perovskite on fluoride-ion intercalation reaction, Hidenori Miki; Kentaro Yamamoto; Toshiyuki Matsunaga; Toshiki Watanabe; Mukesh Kumar; Neha Thakur; Hideki Iba; Hiroshi Kageyama; Yoshiharu Uchimoto, Mar. 2024, 406, 116481, 116481, Scientific journal, 10.1016/j.ssi.2024.116481
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Refereed, Solid State Ionics, Elsevier BV, Tuning the ionic and electronic paths in Li2S-based cathode for high-rate performance all-solid-state lithium‑sulfur batteries, Wenli Pan; Toshiki Watanabe; Toshiyuki Matsunaga; Mukesh Kumar; Neha Thakur; Kentaro Yamamoto; Masayuki Uesugi; Akihisa Takeuchi; Atsushi Sakuda; Akitoshi Hayashi; Masahiro Tatsumisago; Yoshiharu Uchimoto, Mar. 2024, 406, 116479, 116479, Scientific journal, 10.1016/j.ssi.2024.116479
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Refereed, Chemistry of Materials, American Chemical Society (ACS), Revealing the Unusual Mechanism of Mixed Cationic and Anionic Redox in Oxyfluorosulfide Cathode for All-Solid-State Fluoride-Ion Batteries, Zulai Cao; Kentaro Yamamoto; Toshiyuki Matsunaga; Toshiki Watanabe; Mukesh Kumar; Neha Thakur; Ryogo Ohashi; Shintaro Tachibana; Hidenori Miki; Kazuto Ide; Hideki Iba; Hisao Kiuchi; Yoshihisa Harada; Yuki Orikasa; Yoshiharu Uchimoto, 14 Feb. 2024, Scientific journal, 10.1021/acs.chemmater.3c02650
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Refereed, The Journal of Physical Chemistry C, American Chemical Society (ACS), Phase Transition Mechanism of ZnMn₂O₄ Spinel Oxide with Electrochemical Magnesium-Ion Insertion, Kentaro Yamamoto; Feilure Tuerxun; Toshiyuki Matsunaga; Toshiki Watanabe; Tomoki Uchiyama; Aierxiding Abulikemu; Kiyoshi Kanamura; Yoshiharu Uchimoto, 26 Jan. 2024, Scientific journal, 10.1021/acs.jpcc.3c06518
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Refereed, Journal of the American Chemical Society, American Chemical Society (ACS), Double-Layered Perovskite Oxyfluoride Cathodes with High Capacity Involving O–O Bond Formation for Fluoride-Ion Batteries, Hidenori Miki; Kentaro Yamamoto; Hiroyuki Nakaki; Takahiro Yoshinari; Koji Nakanishi; Shinji Nakanishi; Hideki Iba; Jun Miyawaki; Yoshihisa Harada; Akihide Kuwabara; Yanchang Wang; Toshiki Watanabe; Toshiyuki Matsunaga; Kazuhiko Maeda; Hiroshi Kageyama; Yoshiharu Uchimoto, 09 Jan. 2024, Scientific journal, 10.1021/jacs.3c10871
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Refereed, Advanced Materials Interfaces, Wiley, Influence of Primary Particle Morphology and Hydrophilicity of Carbon Matrix on Electrode Coating Quality and Performance of Practical High‐Energy‐Density Li–S Batteries, Shanglin Li; Zhaoyue Chen; Kentaro Yamamoto; Toshiki Watanabe; Yoshiharu Uchimoto; Yuki Mori; Gen Inoue; Kazuya Ohuchi; Satoshi Inagaki; Kazuhide Ueno; Kaoru Dokko; Masayoshi Watanabe, Abstract

Li–S batteries have attracted attention as the next‐generation secondary batteries. While substantial progress is made in understanding Li–S chemistry at a fundamental level, only a limited number of studies are dedicated to achieving high energy density at the practical pouch cell level. The challenge lies in attaining high‐energy‐density Li–S batteries under harsh conditions, which involve a minimal amount of electrolyte and a relatively high areal S‐loading cathode. This discrepancy creates a substantial gap between fundamental material research and comprehensive cell‐level investigations. In this study, it is investigated how the morphology and properties of two carbon materials, namely Ketjen black (KB) and mesoporous carbon nano‐dendrites (MCND), influence the composite cathode architecture and determine the performance of Li–S batteries. Unlike KB, MCND allows for a higher sulfur‐loading cathode without evident cracks in the composite cathode. This achievement can be attributed to the high porosity, excellent wettability, and high conductivity exhibited during an identical electrode preparation procedure. Furthermore, large‐format Li–S pouch cells incorporating MCND/S cathodes are successfully fabricated. These cells demonstrate an energy density surpassing 250 Wh kg⁻¹ and an initial discharge capacity of 3.7 Ah under challenging conditions (S‐loading > 5 mg cm⁻² and E/S < 3.5 µL mg⁻¹)., 03 Jan. 2024, Scientific journal, 10.1002/admi.202300864
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Refereed, ACS Applied Energy Materials, American Chemical Society (ACS), High-Performance Copper/Copper Oxide-Based Cathode Prepared by a Facile Ball-Milling Method for All-Solid-State Fluoride-Ion Batteries, Zulai Cao; Kentaro Yamamoto; Datong Zhang; Toshiyuki Matsunaga; Mukesh Kumar; Neha Thakur; Toshiki Watanabe; Hidenori Miki; Hideki Iba; Koji Amezawa; Yoshiharu Uchimoto, 16 Nov. 2023, Scientific journal, 10.1021/acsaem.3c02003
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Refereed, ACS Applied Materials & Interfaces, American Chemical Society (ACS), Improving the Cyclic Reversibility of Layered Li-Rich Cathodes by Combining Oxygen Vacancies and Surface Fluorination, Aierxiding Abulikemu; Toshiyuki Matsunaga; Xian Shi; Mukesh Kumar; Neha Thakur; Tsuyoshi Takami; Kentaro Yamamoto; Tomoki Uchiyama; Toshiki Watanabe; Miki Inada; Yoshiharu Uchimoto, 15 Nov. 2023, Scientific journal, 10.1021/acsami.3c11511
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Refereed, ACS Applied Materials & Interfaces, American Chemical Society (ACS), Investigating Degradation Mechanisms in PtCo Alloy Catalysts: The Role of Co Content and a Pt-Rich Shell Using Operando High-Energy Resolution Fluorescence Detection X-ray Absorption Spectroscopy, Yunfei Gao; Neha Thakur; Tomoki Uchiyama; Weijie Cao; Kentaro Yamamoto; Toshiki Watanabe; Mukesh Kumar; Ryota Sato; Toshiharu Teranishi; Hideto Imai; Yoshiharu Sakurai; Yoshiharu Uchimoto, 31 Oct. 2023, Scientific journal, 10.1021/acsami.3c11248
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Refereed, Batteries & Supercaps, Wiley, An Electron/Ion Dual Conductive Integrated Cathode Using Cationic/Anionic Redox for High‐Energy‐Density All‐Solid‐State Lithium‐Sulfur Batteries, Wenli Pan; Kentaro Yamamoto; Toshiyuki Matsunaga; Toshiki Watanabe; Mukesh Kumar; Neha Thakur; Tomoki Uchiyama; Masayuki Uesugi; Akihisa Takeuchi; Atsushi Sakuda; Akitoshi Hayashi; Masahiro Tatsumisago; Yoshiharu Uchimoto, All‐solid‐state lithium‐sulfur batteries (ASSLSB), composed of sulfur cathode and lithium metal anode with high theoretical capacity, have a potentially higher energy density by weight than a typical lithium‐ion battery (LIB). However, due to insulating sulfur, a relatively large proportion of electronic (carbon) and ionic (solid electrolyte) conductors are mixed for cathode fabrication, leading to inferior practical capacity. Herein, we report that a novel integrated cathode Li2S‐LiI‐MoS2 which has relatively high electronic and ionic conductivities (the order of 10‐4 S cm‐1) without any carbon and solid electrolyte. The ASSLSB with integrated Li2S‐LiI‐MoS2 cathode deliver a remarkably high energy density of 1020 Wh kg‐1 at the cathode level at room temperature. By applying precise X‐ray diffraction, pair distribution function analysis and X‐ray computed tomography, it is found that the formation of an ionic conducting phase composed mainly of LiI during discharge is responsible for the high rate capability. Furthermore, X‐ray absorption fine structure (XAFS) has also revealed the charge compensation mechanism and ascertain the involvement of both Mo 3d and S 3p orbitals during the charging and discharging process. It is believed the strategy will pave the way for developing high practical energy density at room temperature for all‐solid‐state batteries., 27 Oct. 2023, Scientific journal, 10.1002/batt.202300427
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Refereed, ACS Catalysis, American Chemical Society (ACS), Origin of High Activity and Durability of Confined Ordered Intermetallic PtCo Catalysts for the Oxygen Reduction Reaction in Rotating Disk Electrode and Fuel Cell Operating Conditions, Yunfei Gao; Tomoki Uchiyama; Kentaro Yamamoto; Toshiki Watanabe; Satoshi Tominaka; Neha Thakur; Ryota Sato; Toshiharu Teranishi; Hideto Imai; Yoshiharu Sakurai; Yoshiharu Uchimoto, 04 Aug. 2023, 10988, 11000, Scientific journal, 10.1021/acscatal.3c01926
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Refereed, The Journal of Physical Chemistry C, American Chemical Society (ACS), Preventing Capacity Fading in Lithium–Sulfur Batteries Using Sulfur Confinement in Mesoporous Carbon and Fluorinated Solvent-Based Electrolytes, Yuya Torii; Yukiko Matsui; Kentaro Yamamoto; Satoshi Uchida; Shigeaki Yamazaki; Toshiki Watanabe; Koji Nakanishi; Tomoki Uchiyama; Yoshiharu Uchimoto; Masashi Ishikawa, 26 Jul. 2023, Scientific journal, 10.1021/acs.jpcc.3c02992
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Refereed, The Journal of Physical Chemistry C, American Chemical Society (ACS), High-Packing-Density Electrodes by Self-forming Ion Conduction Pathway During Charge Process for All-Solid-State Lithium Ion Batteries, Kentaro Yamamoto; Yao Xiao; Toshiki Watanabe; Atsushi Sakuda; Masakuni Takahashi; Wenli Pan; Koji Nakanishi; Toshiyuki Matsunaga; Masayuki Uesugi; Akihisa Takeuchi; Kentaro Uesugi; Akitoshi Hayashi; Masahiro Tatsumisago; Yoshiharu Uchimoto, 21 Jul. 2023, Scientific journal, 10.1021/acs.jpcc.3c02851
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Refereed, The Journal of Physical Chemistry C, American Chemical Society (ACS), Y₂S₃-Doped Li₂S Active Cathode Materials for All-Solid-State Li–S Batteries, Kazuhiro Hikima; Ryo Fujii; Hirotada Gamo; Hirofumi Tsukasaki; Shigeo Mori; Toshiki Watanabe; Kentaro Yamamoto; Yoshiharu Uchimoto; Hiroyuki Muto; Atsunori Matsuda, 06 Jul. 2023, 127, 28, 13511, 13517, Scientific journal, 10.1021/acs.jpcc.3c02144
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Refereed, ACS Applied Materials & Interfaces, American Chemical Society (ACS), Protection Against Absorption Passivation on Platinum by a Nitrogen-Doped Carbon Shell for Enhanced Oxygen Reduction Reaction, Yunfei Gao; Tomoki Uchiyama; Kentaro Yamamoto; Toshiki Watanabe; Neha Thakur; Ryota Sato; Toshiharu Teranishi; Hideto Imai; Yoshiharu Sakurai; Yoshiharu Uchimoto, 17 Jun. 2023, Scientific journal, 10.1021/acsami.3c04459
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Refereed, Chemistry of Materials, American Chemical Society (ACS), Probing Local Environments of Oxygen Vacancies Responsible for Hydration in Sc-Doped Barium Zirconates at Elevated Temperatures: In Situ X-ray Absorption Spectroscopy, Thermogravimetry, and Active Learning Ab Initio Replica Exchange Monte Carlo Simulations, Kenta Hoshino; Shusuke Kasamatsu; Junji Hyodo; Kentaro Yamamoto; Hiroyuki Setoyama; Toshihiro Okajima; Yoshihiro Yamazaki, 14 Mar. 2023, Scientific journal, 10.1021/acs.chemmater.2c02116
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Refereed, Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Improving electrochemical performance of Li₂S cathode based on point defect control with cation/anion dual doping, Pan Wenli; Kentaro Yamamoto; Nobuya Machida; Toshiyuki Matsunaga; Mukesh Kumar; Neha Thakur; Toshiki Watanabe; Atsushi Sakuda; Akitoshi Hayashi; Masahiro Tatsumisago; Yoshiharu Uchimoto, Li₂S is a promising cathode candidate for all-solid-state batteries (ASSBs) because of its high theoretical capacity and availbility of coupling with Li-free anode or anode less electrode. However, ionically insulating..., 2023, Scientific journal, 10.1039/d3ta05426h
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Refereed, Dalton Transactions, Royal Society of Chemistry (RSC), Potassium-rich antiperovskites K₃HTe and K₃FTe and their structural relation to lithium and sodium counterparts, Koji Okada; Susumu Fujii; Cédric Tassel; Shenghan Gao; Hiroki Ubukata; Wenli Pan; Kentaro Yamamoto; Yoshiharu Uchimoto; Akihide Kuwabara; Hiroshi Kageyama, Unlike perovskite oxides, antiperovskites M₃HCh and M₃FCh (M = Li, Na; Ch = S, Se, Te) mostly retain their ideal cubic structure owing to anionic size flexibility and low-energy phonon modes that promote their ionic conductivity., 2023, Scientific journal, 10.1039/d3dt01039b
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Refereed, Chemical Communications, Royal Society of Chemistry (RSC), Unique lithium precipitation behavior inside Li₃PS₄ solid electrolyte observed via multimodal/multiscale operando X-ray computed tomography, Jaehee Park; Toshiki Watanabe; Kentaro Yamamoto; Tomoki Uchiyama; Tsuyoshi Takami; Atsushi Sakuda; Akitoshi Hayashi; Masahiro Tatsumisago; Yoshiharu Uchimoto, Problem of lithium dendrite must be addressed for the practical lithium metal all-solid-state batteries. Herein, three-dimensional morphological changes within Li₃PS₄ electrolyte away from anode were observed using operando X-ray computed..., 2023, Scientific journal, 10.1039/d2cc05224e
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Refereed, Electrochemistry, The Electrochemical Society of Japan, Development of Electrode Materials Based on Design Guideline of Electronic Structure Obtained by Synchrotron Radiation X-ray Analyses, Kentaro YAMAMOTO, 2023, Scientific journal, 10.5796/electrochemistry.23-00032
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Refereed, Electrochemistry, The Electrochemical Society of Japan, Properties of Composite Electrodes for All-solid-state Fluoride-ion Secondary Batteries Processed by High-pressure Torsion, Yanchang WANG; Sangmin LEE; Kentaro YAMAMOTO; Toshiyuki MATSUNAGA; Hidenori MIKI; Hideki IBA; Koichi TSUCHIYA; Tomoki UCHIYAMA; Toshiki WATANABE; Tsuyoshi TAKAMI; Yoshiharu UCHIMOTO, 2023, Scientific journal, 10.5796/electrochemistry.22-00133
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Refereed, Chemistry of Materials, American Chemical Society (ACS), Oxyfluoride Cathode for All-Solid-State Fluoride-Ion Batteries with Small Volume Change Using Three-Dimensional Diffusion Paths, Yanchang Wang; Tsuyoshi Takami; Zhuoran Li; Kentaro Yamamoto; Toshiyuki Matsunaga; Tomoki Uchiyama; Toshiki Watanabe; Hidenori Miki; Toshihiko Inoue; Hideki Iba; Uichiro Mizutani; Hirokazu Sato; Kazuhiko Maeda; Hiroshi Kageyama; Yoshiharu Uchimoto, 14 Nov. 2022, Scientific journal, 10.1021/acs.chemmater.2c02736
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Refereed, Chemistry of Materials, American Chemical Society (ACS), Na₃H(ZnH₄) Antiperovskite: A Large Octahedral Distortion with an Off-Centering Hydride Anion Coupled to Molecular Hydride, Shenghan Gao; Cédric Tassel; Susumu Fujii; Hiroki Ubukata; Tong Zhu; Datong Zhang; Thibault Broux; Takashi Saito; Chengchao Zhong; Emre Yoruk; Kentaro Yamamoto; Akihide Kuwabara; Yoshiharu Uchimoto; Hiroshi Kageyama, 25 Jul. 2022, Scientific journal, 10.1021/acs.chemmater.2c00958
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Refereed, Applied Physics Letters, Partial cation disorder in Li₂MnO₃ obtained by high-pressure synthesis, Aierxiding Abulikemu; Shenghan Gao; Toshiyuki Matsunaga; Hiroshi Takatsu; Cédric Tassel; Hiroshi Kageyama; Takashi Saito; Toshiki Watanabe; Tomoki Uchiyama; Kentaro Yamamoto; Yoshiharu Uchimoto; Tsuyoshi Takami, 02 May 2022, 120, 18, 182404, 182404, Scientific journal, 10.1063/5.0088023
DOI URL

Refereed, ACS Applied Energy Materials, American Chemical Society (ACS), State of the Active Site in La_1–xSr_xCoO_3−δ Under Oxygen Evolution Reaction Investigated by Total-Reflection Fluorescence X-Ray Absorption Spectroscopy, Yadan Ren; Jun Oyama; Tomoki Uchiyama; Yuki Orikasa; Toshiki Watanabe; Kentaro Yamamoto; Tsuyoshi Takami; Yoshinori Nishiki; Shigenori Mitsushima; Yoshiharu Uchimoto, 25 Apr. 2022, 5, 4, 4108, 4116, Scientific journal, 10.1021/acsaem.1c03327
URL DOI URL Scopus URL Scopus Citedby URL

Refereed, Solid State Ionics, Elsevier BV, Studies on the inhibition of lithium dendrite formation in sulfide solid electrolytes doped with LiX (X = Br, I), Seunghoon Yang; Masakuni Takahashi; Kentaro Yamamoto; Koji Ohara; Toshiki Watanabe; Tomoki Uchiyama; Tsuyoshi Takami; Atsushi Sakuda; Akitoshi Hayashi; Masahiro Tatsumisago; Yoshiharu Uchimoto, Apr. 2022, 377, 115869, 115869, Scientific journal, 10.1016/j.ssi.2022.115869
DOI URL Scopus URL Scopus Citedby URL

Refereed, Chemical Physics Reviews, AIP Publishing, Multiscale and hierarchical reaction mechanism in a lithium-ion battery, Yuki Orikasa; Kentaro Yamamoto; Takeshi Shimizu; Yoshiharu Uchimoto, Mar. 2022, 3, 1, 011305, 011305, Scientific journal, 10.1063/5.0062329
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Refereed, Chemistry of Materials, American Chemical Society (ACS), Anion Substitution at Apical Sites of Ruddlesden–Popper-type Cathodes toward High Power Density for All-Solid-State Fluoride-Ion Batteries, Yanchang Wang; Kentaro Yamamoto; Yoshihiro Tsujimoto; Toshiyuki Matsunaga; Datong Zhang; Zulai Cao; Koji Nakanishi; Tomoki Uchiyama; Toshiki Watanabe; Tsuyoshi Takami; Hidenori Miki; Hideki Iba; Kazuhiko Maeda; Hiroshi Kageyama; Yoshiharu Uchimoto, 05 Jan. 2022, 34, 2, 609, 616, Scientific journal, 10.1021/acs.chemmater.1c03189
URL DOI URL Scopus URL Scopus Citedby URL

Refereed, Condensed Matter, MDPI AG, Magnetic Compton Scattering Study of Li-Rich Battery Materials, Kosuke Suzuki; Yuji Otsuka; Kazushi Hoshi; Hiroshi Sakurai; Naruki Tsuji; Kentaro Yamamoto; Naoaki Yabuuchi; Hasnain Hafiz; Yuki Orikasa; Yoshiharu Uchimoto; Yoshiharu Sakurai; Venkatasubramanian Viswanathan; Arun Bansil; Bernardo Barbiellini, The redox process in a lithium-ion battery occurs when a conduction electron from the lithium anode is transferred to the redox orbital of the cathode. Understanding the nature of orbitals involved in anionic as well as cationic redox reactions is important for improving the capacity and energy density of Li-ion batteries. In this connection, we have obtained magnetic Compton profiles (MCPs) from the Li-rich cation-disordered rock-salt compound LixTi0.4Mn0.4O2 (LTMO). The MCPs, which involved the scattering of circularly polarized hard X-rays, are given by the momentum density of all the unpaired spins in the material. The net magnetic moment in the ground state can be extracted from the area under the MCP, along with a SQUID measurement. Our analysis gives insight into the role of Mn 3d magnetic electrons and O 2p holes in the magnetic redox properties of LTMO., 28 Dec. 2021, 7, 1, 4, 4, Scientific journal, 10.3390/condmat7010004
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Refereed, ACS Applied Energy Materials, American Chemical Society (ACS), High Rate Capability from a Graphite Anode through Surface Modification with Lithium Iodide for All-Solid-State Batteries, Seunghoon Yang; Kentaro Yamamoto; Xiaohan Mei; Atsushi Sakuda; Tomoki Uchiyama; Toshiki Watanabe; Tsuyoshi Takami; Akitoshi Hayashi; Masahiro Tatsumisago; Yoshiharu Uchimoto, 19 Dec. 2021, 5, 1, 667, 673, Scientific journal, 10.1021/acsaem.1c03166
URL DOI URL Scopus URL Scopus Citedby URL

Refereed, Solid State Ionics, Elsevier BV, Accelerated lithium ions diffusion at the interface between LiFePO4 electrode and electrolyte by surface-nitride treatment, Kentaro Yamamoto; Takahiro Yoshinari; Akihide Kuwabara; Eri Kato; Yuki Orikasa; Koji Nakanishi; Tomoki Uchiyama; Kazuhiko Maeda; Hiroshi Kageyama; Toshiaki Ohta; Yoshiharu Uchimoto, Dec. 2021, 373, 115792, 115792, Scientific journal, 10.1016/j.ssi.2021.115792
DOI URL Scopus URL Scopus Citedby URL

Refereed, Nature Communications, Springer Science and Business Media LLC, Hydride-based antiperovskites with soft anionic sublattices as fast alkali ionic conductors, Shenghan Gao; Thibault Broux; Susumu Fujii; Cédric Tassel; Kentaro Yamamoto; Yao Xiao; Itaru Oikawa; Hitoshi Takamura; Hiroki Ubukata; Yuki Watanabe; Kotaro Fujii; Masatomo Yashima; Akihide Kuwabara; Yoshiharu Uchimoto; Hiroshi Kageyama, Dec. 2021, 12, 1, Scientific journal, 10.1038/s41467-020-20370-2
DOI URL Scopus URL Scopus Citedby URL

Refereed, ChemElectroChem, Wiley, Quadruple perovskite oxides CaMn7O12 proceed by two‐active‐site reaction mechanism for oxygen evolution reaction, Yadan Ren; Kodai Kashihara; Tomoki Uchiyama; Yuki Orikasa; Toshiki Watanabe; Kentaro Yamamoto; Tsuyoshi Takami; Toshiyuki Matsunaga; Yoshinori Nishiki; Shigenori Mitsushima; Yoshiharu Uchimoto, 29 Oct. 2021, 8, 23, 4605, 4611, Scientific journal, 10.1002/celc.202101228
URL DOI URL Scopus URL Scopus Citedby URL

Refereed, Advanced Energy Materials, Wiley, Reversible and Fast (De)fluorination of High‐Capacity Cu2O Cathode: One Step Toward Practically Applicable All‐Solid‐State Fluoride‐Ion Battery, Datong Zhang; Kentaro Yamamoto; Yanchang Wang; Shenghan Gao; Tomoki Uchiyama; Toshiki Watanabe; Tsuyoshi Takami; Toshiyuki Matsunaga; Koji Nakanishi; Hidenori Miki; Hideki Iba; Koji Amezawa; Kazuhiko Maeda; Hiroshi Kageyama; Yoshiharu Uchimoto, 17 Oct. 2021, 11, 45, 2102285, 2102285, Scientific journal, 10.1002/aenm.202102285
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Refereed, ACS Applied Energy Materials, American Chemical Society (ACS), Quantitative Evaluation of the Activity of Low-Spin Tetravalent Nickel Ion Sites for the Oxygen Evolution Reaction, Yadan Ren; Tomoya Horiguchi; Tomoki Uchiyama; Yuki Orikasa; Toshiki Watanabe; Kentaro Yamamoto; Tsuyoshi Takami; Toshiyuki Matsunaga; Yoshinori Nishiki; Shigenori Mitsushima; Yoshiharu Uchimoto, 26 Sep. 2021, 4, 10, 10731, 10738, Scientific journal, 10.1021/acsaem.1c01719
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Refereed, ACS Applied Materials & Interfaces, American Chemical Society (ACS), Rate-Determining Process at Electrode/Electrolyte Interfaces for All-Solid-State Fluoride-Ion Batteries, Datong Zhang; Hiroyuki Nakano; Kentaro Yamamoto; Kenta Tanaka; Tatsuma Yahara; Kazuyuki Imai; Takuya Mori; Hidenori Miki; Shinji Nakanishi; Hideki Iba; Toshiki Watanabe; Tomoki Uchiyama; Koji Amezawa; Yoshiharu Uchimoto, 21 Jun. 2021, 13, 25, 30198, 30204, Scientific journal, 10.1021/acsami.1c06947
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Refereed, Chemistry of Materials, American Chemical Society (ACS), Investigation of the Suppression of Dendritic Lithium Growth with a Lithium-Iodide-Containing Solid Electrolyte, Masakuni Takahashi; Toshiki Watanabe; Kentaro Yamamoto; Koji Ohara; Atsushi Sakuda; Takuya Kimura; Seunghoon Yang; Koji Nakanishi; Tomoki Uchiyama; Masao Kimura; Akitoshi Hayashi; Masahiro Tatsumisago; Yoshiharu Uchimoto, 15 Jun. 2021, 33, 13, 4907, 4914, Scientific journal, 10.1021/acs.chemmater.1c00270
URL DOI URL Scopus URL Scopus Citedby URL

Refereed, Nature, Springer Science and Business Media LLC, Tomographic reconstruction of oxygen orbitals in lithium-rich battery materials, Hasnain Hafiz; Kosuke Suzuki; Bernardo Barbiellini; Naruki Tsuji; Naoaki Yabuuchi; Kentaro Yamamoto; Yuki Orikasa; Yoshiharu Uchimoto; Yoshiharu Sakurai; Hiroshi Sakurai; Arun Bansil; Venkatasubramanian Viswanathan, 10 Jun. 2021, 594, 7862, 213, 216, Scientific journal, 10.1038/s41586-021-03509-z
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Refereed, ACS Omega, American Chemical Society (ACS), Impact of the Composition of Alcohol/Water Dispersion on the Proton Transport and Morphology of Cast Perfluorinated Sulfonic Acid Ionomer Thin Films, Xiao Gao; Kentaro Yamamoto; Tomoyasu Hirai; Noboru Ohta; Tomoki Uchiyama; Toshiki Watanabe; Hideto Imai; Seiho Sugawara; Kazuhiko Shinohara; Yoshiharu Uchimoto, 24 May 2021, 6, 22, 14130, 14137, Scientific journal, 10.1021/acsomega.1c00607
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Refereed, ACS Applied Energy Materials, American Chemical Society (ACS), Cu–Pb Nanocomposite Cathode Material toward Room-Temperature Cycling for All-Solid-State Fluoride-Ion Batteries, Datong Zhang; Takahiro Yoshinari; Kentaro Yamamoto; Yuya Kitaguchi; Aika Ochi; Koji Nakanishi; Hidenori Miki; Shinji Nakanishi; Hideki Iba; Toshiki Watanabe; Tomoki Uchiyama; Yuki Orikasa; Koji Amezawa; Yoshiharu Uchimoto, 06 Apr. 2021, 4, 4, 3352, 3357, Scientific journal, 10.1021/acsaem.0c03087
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Refereed, Solid State Ionics, Elsevier BV, Improvement of lithium ionic conductivity of Li3PS4 through suppression of crystallization using low-boiling-point solvent in liquid-phase synthesis, Masakuni Takahashi; Seunghoon Yang; Kentaro Yamamoto; Koji Ohara; Nguyen Huu Huy Phuc; Toshiki Watanabe; Tomoki Uchiyama; Atsushi Sakuda; Akitoshi Hayashi; Masahiro Tatsumisago; Hiroyuki Muto; Atsunori Matsuda; Yoshiharu Uchimoto, Mar. 2021, 361, 115568, 115568, Scientific journal, 10.1016/j.ssi.2021.115568
DOI URL Scopus URL Scopus Citedby URL

Refereed, ACS Applied Energy Materials, American Chemical Society (ACS), High Ionic Conductivity of Liquid-Phase-Synthesized Li3PS4 Solid Electrolyte, Comparable to That Obtained via Ball Milling, Kentaro Yamamoto; Seunghoon Yang; Masakuni Takahashi; Koji Ohara; Tomoki Uchiyama; Toshiki Watanabe; Atsushi Sakuda; Akitoshi Hayashi; Masahiro Tatsumisago; Hiroyuki Muto; Atsunori Matsuda; Yoshiharu Uchimoto, 12 Feb. 2021, 4, 3, 2275, 2281, Scientific journal, 10.1021/acsaem.0c02771
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Refereed, Journal of Alloys and Compounds, Elsevier BV, Rocksalt type Li2Nb0·15Mn0·85O3 without structure degradation or redox evolution upon cycling, Aierxiding Abulikemu; Toshiyuki Matsunaga; Aruto Watanabe; Kentaro Yamamoto; Tomoki Uchiyama; Koji Nakanishi; Shogo Kawaguchi; Keiichi Osaka; Yoshiharu Uchimoto, Feb. 2021, 853, 156984, 156984, Scientific journal, 10.1016/j.jallcom.2020.156984
DOI URL Scopus URL Scopus Citedby URL

Refereed, Chemistry of Materials, American Chemical Society (ACS), Phase Transition Behavior of MgMn2O4 Spinel Oxide Cathode during Magnesium Ion Insertion, Feilure Tuerxun; Saeko Otani; Kentaro Yamamoto; Toshiyuki Matsunaga; Hiroaki Imai; Toshihiko Mandai; Toshiki Watanabe; Tomoki Uchiyama; Kiyoshi Kanamura; Yoshiharu Uchimoto, 29 Jan. 2021, 33, 3, 1006, 1012, Scientific journal, 10.1021/acs.chemmater.0c04194
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Refereed, ACS Applied Energy Materials, American Chemical Society (ACS), Operando X-ray Absorption Spectroscopic Study on the Influence of Specific Adsorption of the Sulfo Group in the Perfluorosulfonic Acid Ionomer on the Oxygen Reduction Reaction Activity of the Pt/C Catalyst, Chen Liu; Tomoki Uchiyama; Noriyuki Nagata; Masazumi Arao; Kentaro Yamamoto; Toshiki Watanabe; Xiao Gao; Hideto Imai; Syota Katayama; Seiho Sugawara; Kazuhiko Shinohara; Koichiro Oshima; Shigeki Sakurai; Yoshiharu Uchimoto, 21 Jan. 2021, 4, 2, 1143, 1149, Scientific journal, 10.1021/acsaem.0c02326
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Refereed, Journal of Materials Chemistry A, Kinetic Analysis and Alloy Designs for Metal/Metal Fluorides toward High Rate Capability for All-solid-state Fluoride Ion Batteries, Takahiro Yoshinari; Datong Zhang; Kentaro Yamamoto; Yuya Kitaguchi; Aika Ochi; Koji Nakanishi; Hidenori Miki; Shinji Nakanishi; Hideki Iba; Tomoki Uchiyama; Toshiki Watanabe; Toshiyuki Matsunaga; Koji Amezawa; Yoshiharu Uchimoto, 2021, 9, 11, 7018, 7024, Scientific journal, 10.1039/d0ta12055c
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Refereed, Chemistry of Materials, American Chemical Society (ACS), Fluoride-Ion Shuttle Battery with High Volumetric Energy Density, Hiroyuki Nakano; Toshiyuki Matsunaga; Takuya Mori; Koji Nakanishi; Yoshiyuki Morita; Kazuto Ide; Ken-ichi Okazaki; Yuki Orikasa; Taketoshi Minato; Kentaro Yamamoto; Zempachi Ogumi; Yoshiharu Uchimoto, 28 Dec. 2020, 33, 1, 459, 466, Scientific journal, 10.1021/acs.chemmater.0c04570
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Refereed, ACS Applied Energy Materials, American Chemical Society (ACS), Effect of Temperature on Oxygen Reduction Reaction Kinetics for Pd Core–Pt Shell Catalyst with Different Core Size, Chen Liu; Tomoki Uchiyama; Kentaro Yamamoto; Toshiki Watanabe; Xiao Gao; Hideto Imai; Masashi Matsumoto; Seiho Sugawara; Kazuhiko Shinohara; Koichiro Oshima; Shigeki Sakurai; Yoshiharu Uchimoto, 28 Dec. 2020, 4, 1, 810, 818, Scientific journal, 10.1021/acsaem.0c02708
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Refereed, ACS Applied Energy Materials, American Chemical Society (ACS), Comparison of Sulfur Cathode Reactions between a Concentrated Liquid Electrolyte System and a Solid-State Electrolyte System by Soft X-Ray Absorption Spectroscopy, Yao Xiao; Kentaro Yamamoto; Yukiko Matsui; Toshiki Watanabe; Atsushi Sakuda; Koji Nakanishi; Tomoki Uchiyama; Akitoshi Hayashi; Shoso Shingubara; Masahiro Tatsumisago; Masashi Ishikawa; Masayoshi Watanabe; Yoshiharu Uchimoto, 17 Dec. 2020, 4, 1, 186, 193, Scientific journal, 10.1021/acsaem.0c02063
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Refereed, ACS Central Science, American Chemical Society (ACS), Nanostructured LiMnO2 with Li3PO4 Integrated at the Atomic Scale for High-Energy Electrode Materials with Reversible Anionic Redox, Miho Sawamura; Sho Kobayakawa; Jun Kikkawa; Neeraj Sharma; Damian Goonetilleke; Aditya Rawal; Nanaka Shimada; Kentaro Yamamoto; Rina Yamamoto; Yingying Zhou; Yoshiharu Uchimoto; Koji Nakanishi; Kei Mitsuhara; Koji Ohara; Jiwon Park; Hye Ryung Byon; Hiroaki Koga; Masaki Okoshi; Toshiaki Ohta; Naoaki Yabuuchi, 15 Dec. 2020, 6, 12, 2326, 2338, Scientific journal, 10.1021/acscentsci.0c01200
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Refereed, The Journal of Physical Chemistry C, American Chemical Society (ACS), Effect of Interaction among Magnesium Ions, Anion, and Solvent on Kinetics of the Magnesium Deposition Process, Feilure Tuerxun; Kentaro Yamamoto; Toshihiko Mandai; Yoshitaka Tateyama; Koji Nakanishi; Tomoki Uchiyama; Toshiki Watanabe; Yusuke Tamenori; Kiyoshi Kanamura; Yoshiharu Uchimoto, 15 Dec. 2020, 124, 52, 28510, 28519, Scientific journal, 10.1021/acs.jpcc.0c08268
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Refereed, Solid State Ionics, Elsevier BV, Surface analysis of lanthanum strontium cobalt oxides under cathodic polarization at high temperature through operando total-reflection X-ray absorption and X-ray fluorescence spectroscopy, Yoichiro Tsuji; Shinnosuke Sako; Kiyofumi Nitta; Kentaro Yamamoto; Yang Shao-horn; Yoshiharu Uchimoto; Yuki Orikasa, Dec. 2020, 357, 115502, 115502, Scientific journal, 10.1016/j.ssi.2020.115502
DOI URL Scopus URL Scopus Citedby URL

Refereed, Solid State Ionics, Elsevier BV, Relationship between rate performance and electronic/structural changes during oxygen redox of lithium-rich 4d/3d transition metal oxides, Aruto Watanabe; Kentaro Yamamoto; Yuki Orikasa; Masatsugu Oishi; Koji Nakanishi; Tomoki Uchiyama; Toshiyuki Matsunaga; Yoshiharu Uchimoto, Dec. 2020, 357, 115459, 115459, Scientific journal, 10.1016/j.ssi.2020.115459
DOI URL Scopus URL Scopus Citedby URL

Refereed, Solid State Ionics, Elsevier BV, Substrate-dependent proton transport and nanostructural orientation of perfluorosulfonic acid polymer thin films on Pt and carbon substrate, Xiao Gao; Kentaro Yamamoto; Tomoyasu Hirai; Noboru Ohta; Tomoki Uchiyama; Toshiki Watanabe; Masakuni Takahashi; Naoki Takao; Hideto Imai; Seiho Sugawara; Kazuhiko Shinohara; Yoshiharu Uchimoto, Dec. 2020, 357, 115456, 115456, Scientific journal, 10.1016/j.ssi.2020.115456
DOI URL Scopus URL Scopus Citedby URL

Refereed, ChemElectroChem, Wiley, The Effect of Cation Mixing in LiNiO2 toward the Oxygen Evolution Reaction, Yadan Ren; Ryusei Yamaguchi; Tomoki Uchiyama; Yuki Orikasa; Toshiki Watanabe; Kentaro Yamamoto; Toshiyuki Matsunaga; Yoshinori Nishiki; Shigenori Mitsushima; Yoshiharu Uchimoto, 17 Nov. 2020, 8, 1, 70, 76, Scientific journal, 10.1002/celc.202001207
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Refereed, ACS Omega, American Chemical Society (ACS), Synthesis of Sulfide Solid Electrolytes through the Liquid Phase: Optimization of the Preparation Conditions, Kentaro Yamamoto; Masakuni Takahashi; Koji Ohara; Nguyen Huu Huy Phuc; Seunghoon Yang; Toshiki Watanabe; Tomoki Uchiyama; Atsushi Sakuda; Akitoshi Hayashi; Masahiro Tatsumisago; Hiroyuki Muto; Atsunori Matsuda; Yoshiharu Uchimoto, 29 Sep. 2020, 5, 40, 26287, 26294, Scientific journal, 10.1021/acsomega.0c04307
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Refereed, Chemical Physics Letters, Elsevier BV, Reversible charge storage of ferrocene-adsorbed activated carbon using ionic liquid electrolytes, Hiroyuki Itoi; Yuto Kasai; Hideyuki Hasegawa; Kentaro Yamamoto; Hiroyuki Iwata; Yoshimi Ohzawa, Jul. 2020, 137795, 137795, Scientific journal, 10.1016/j.cplett.2020.137795
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Refereed, ACS Applied Energy Materials, American Chemical Society (ACS), Enhanced Performance Induced by Phase Transition of Li2FeSiO4 upon Cycling at High Temperature, Titus Masese; Yuki Orikasa; Kentaro Yamamoto; Yosuke Hori; Rika Hagiwara; Yoshiharu Uchimoto, 22 Jun. 2020, 3, 6, 5722, 5727, Scientific journal, 10.1021/acsaem.0c00668
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Refereed, ACS Applied Materials & Interfaces, American Chemical Society (ACS), Determining Factor on the Polarization Behavior of Magnesium Deposition for Magnesium Battery Anode, Feilure Tuerxun; Kentaro Yamamoto; Masashi Hattori; Toshihiko Mandai; Koji Nakanishi; Ashu Choudhary; Yoshitaka Tateyama; Keitaro Sodeyama; Aiko Nakao; Tomoki Uchiyama; Masaki Matsui; Kazuki Tsuruta; Yusuke Tamenori; Kiyoshi Kanamura; Yoshiharu Uchimoto, 10 Jun. 2020, 12, 23, 25775, 25785, Scientific journal, 10.1021/acsami.0c03696
DOI URL Scopus URL Scopus Citedby URL

Refereed, physica status solidi (b), Wiley, Observation of liquid phase synthesis of sulfide solid electrolytes using time‐resolved pair distribution function analysis, Koji Ohara; Naoya Masuda; Hiroshi Yamaguchi; Atsushi Yao; Satoshi Tominaka; Hiroki Yamada; Satoshi Hiroi; Masakuni Takahashi; Kentaro Yamamoto; Toru Wakihara; Yoshiharu Uchimoto; Futoshi Utsuno; Shigeru Kimura, 09 Jun. 2020, 257, 11, Scientific journal, 10.1002/pssb.202000106
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Refereed, Science Advances, American Association for the Advancement of Science (AAAS), A reversible oxygen redox reaction in bulk-type all-solid-state batteries, Kenji Nagao; Yuka Nagata; Atsushi Sakuda; Akitoshi Hayashi; Minako Deguchi; Chie Hotehama; Hirofumi Tsukasaki; Shigeo Mori; Yuki Orikasa; Kentaro Yamamoto; Yoshiharu Uchimoto; Masahiro Tatsumisago, Jun. 2020, 6, 25, eaax7236, eaax7236, Scientific journal, 10.1126/sciadv.aax7236
DOI URL Scopus URL Scopus Citedby URL

Refereed, Solid State Ionics, Reaction mechanism of electrochemical insertion/extraction of magnesium ions in olivine-type FePO4, Aruto Watanabe; Kentaro Yamamoto; Yuki Orikasa; Titus Masese; Takuya Mori; Tomoki Uchiyama; Toshiyuki Matsunaga; Yoshiharu Uchimoto, Jun. 2020, 349, Scientific journal, 10.1016/j.ssi.2020.115311
DOI URL Scopus URL Scopus Citedby URL

Refereed, ACS Applied Energy Materials, American Chemical Society (ACS), Capacity Improvement by Nitrogen Doping to Lithium-Rich Cathode Materials with Stabilization Effect of Oxide Ions Redox, Aruto Watanabe; Kentaro Yamamoto; Tomoki Uchiyama; Toshiyuki Matsunaga; Akitoshi Hayashi; Kazuhiko Maeda; Hiroshi Kageyama; Yoshiharu Uchimoto, 26 May 2020, 3, 5, 4162, 4167, Scientific journal, 10.1021/acsaem.0c00564
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Refereed, Langmuir, Morphology Changes in Perfluorosulfonated Ionomer from Thickness and Thermal Treatment Conditions, Xiao Gao; Kentaro Yamamoto; Tomoyasu Hirai; Tomoki Uchiyama; Noboru Ohta; Naoki Takao; Masashi Matsumoto; Hideto Imai; Seiho Sugawara; Kazuhiko Shinohara; Yoshiharu Uchimoto, Apr. 2020, 36, 14, 3871, 3878, Scientific journal, 10.1021/acs.langmuir.9b03564
DOI URL Scopus URL Scopus Citedby URL

Refereed, JOURNAL OF ALLOYS AND COMPOUNDS, Structural analysis of imperfect Li2TiO3 crystals, Watanabe, Aruto; Matsunaga, Toshiyuki; Abulikemu, Aierxiding; Shimoda, Keiji; Yamamoto, Kentaro; Uchiyama, Tomoki; Uchimoto, Yoshiharu, Apr. 2020, 819, Scientific journal, 10.1016/j.jallcom.2019.153037
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Refereed, CHEMISTRY OF MATERIALS, Noncrystalline Nanocomposites as a Remedy for the Low Diffusivity of Multivalent Ions in Battery Cathodes, Yuki Orikasa; Kazuaki Kisu; Etsuro Iwama; Wako Naoi; Yusuke Yamaguchi; Yoshitomo Yamaguchi; Naohisa Okita; Koji Ohara; Toshiyuki Munesada; Masashi Hattori; Kentaro Yamamoto; Patrick Rozier; Patrice Simon; Katsuhiko Naoi, Feb. 2020, 32, 3, 1011, 1021, Scientific journal, 10.1021/acs.chemmater.9b03665
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Refereed, Journal of Materials Chemistry A, Understanding the Reaction Mechanism and Performances of 3d Transition Metal Cathodes for All-solid-state Fluoride Ion Batteries, Datong Zhang; Kentaro Yamamoto; Aika Ochi; Yanchang Wang; Takahiro Yoshinari; Koji Nakajishi; Hiroyuki Nakano; Hidenori Miki; Shinji Nakanishi; Hideki Iba; Tomoki Uchiyama; Toshiki Watanabe; Koji Amezawa; Yoshiharu Uchimoto, 2020, 9, 1, 406, 412, Scientific journal, 10.1039/d0ta08824b
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Refereed, RSC Advances, Royal Society of Chemistry (RSC), Operando soft X-ray absorption spectroscopic study on microporous carbon-supported sulfur cathodes, Yao Xiao; Kentaro Yamamoto; Yukiko Matsui; Toshiki Watanabe; Koji Nakanishi; Tomoki Uchiyama; Shoso Shingubara; Masashi Ishikawa; Masayoshi Watanabe; Yoshiharu Uchimoto, 2020, 10, 65, 39875, 39880, Scientific journal, 10.1039/d0ra08299f
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Refereed, Electrochemistry, The Electrochemical Society of Japan, Operando X-ray Absorption Spectroscopic Study on the Effect of Ionic Liquid Coverage upon the Oxygen Reduction Reaction Activity of Pd-core Pt-shell Catalysts, Tomoki UCHIYAMA; Chen LIU; Jyunichi ISHIHARA; Kentaro YAMAMOTO; Toshiki WATANABE; Hideto IMAI; Koichiro OSHIMA; Shigeki SAKURAI; Minoru INABA; Yoshiharu UCHIMOTO, 2020, 89, 1, 31, 35, Scientific journal, 10.5796/electrochemistry.20-00122
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Refereed, Electrochemistry, The Electrochemical Society of Japan, Investigation of Cathodic Reaction Mechanism in Solid Oxide Fuel Cells by Operando X-Ray Absorption Spectroscopy, Yoichiro TSUJI; Koji AMEZAWA; Takayuki NAKAO; Toshiaki INA; Tatsuya KAWADA; Kentaro YAMAMOTO; Yoshiharu UCHIMOTO; Yuki ORIKASA, 2020, 88, 6, 560, 565, Scientific journal, 10.5796/electrochemistry.20-00108
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Refereed, CHEMISTRY OF MATERIALS, Charge Compensation Mechanism of Lithium-Excess Metal Oxides with Different Covalent and Ionic Characters Revealed by Operando Soft and Hard X-ray Absorption Spectroscopy, Yamamoto, Kentaro; Zhou, Yingying; Yabuuchi, Naoaki; Nakanishi, Koji; Yoshinari, Takahiro; Kobayashi, Takanori; Kobayashi, Yuki; Yamamoto, Rina; Watanabe, Aruto; Orikasa, Yuki; Tsuruta, Kazuki; Park, Jiwon; Byon, Hye Ryung; Tamenori, Yusuke; Ohta, Toshiaki; Uchimoto, Yoshiharu, Jan. 2020, 32, 1, 139, 147, Scientific journal, 10.1021/acs.chemmater.9b02838
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Refereed, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, Observation of Subsurface Structure of Pt/C Catalyst Using Pair Distribution Function and Simple Modeling Techniques, Masakuni Takahashi; Koji Ohara; Kentaro Yamamoto; Tomoki Uchiyama; Hajime Tanida; Takanori Itoh; Hideto Imai; Seiho Sugawara; Kazuhiko Shinohara; Yoshiharu Uchimoto, Jan. 2020, 93, 1, 37, 42, Scientific journal, 10.1246/bcsj.20190256
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Refereed, Physical Review B, Identification of ferrimagnetic orbitals preventing spinel degradation by charge ordering in LixMn2O4, Hasnain Hafiz; Kosuke Suzuki; Bernardo Barbiellini; Yuki Orikasa; Stanislaw Kaprzyk; Naruki Tsuji; Kentaro Yamamoto; Ayumu Terasaka; Kazushi Hoshi; Yoshiharu Uchimoto; Yoshiharu Sakurai; Hiroshi Sakurai; Arun Bansil, 04 Nov. 2019, 100, 20, Scientific journal, 10.1103/physrevb.100.205104
DOI URL

Refereed, CHEMISTRY OF MATERIALS, Quantitative Elucidation of the Non-Equilibrium Phase Transition in LiFePO4 via the Intermediate Phase, Yoshinari Takahiro; Mori Takuya; Otani Kazufumi; Munesada Toshiyuki; Yamamoto Kentaro; Uchiyama Tomoki; Fukuda Katsutoshi; Koyama Yukinori; Hagiwara Rika; Orikasa Yuki; Uchimoto Yoshiharu, 24 Sep. 2019, 31, 18, 7160, 7166, Scientific journal, 10.1021/acs.chemmater.9b00834
DOI URL Scopus URL Scopus Citedby URL

Refereed, Journal of Power Sources, Exothermal mechanisms in the charged LiNi1/3Mn1/3Co1/3O2 electrode layers for sulfide-based all-solid-state lithium batteries, Hirofumi Tsukasaki; Tomoki Uchiyama; Kentaro Yamamoto; Shigeo Mori; Yoshiharu Uchimoto; Hiroe Kowada; Akitoshi Hayashi; Masahiro Tatsumisago, 15 Sep. 2019, 434, Scientific journal, 10.1016/j.jpowsour.2019.226714
DOI URL Scopus URL Scopus Citedby URL

Refereed, The Journal of Physical Chemistry C, American Chemical Society ({ACS}), Morphological Effect on Reaction Distribution Influenced by Binder Materials in Composite Electrodes for Sheet-type All-Solid-State Lithium-Ion Batteries with the Sulfide-based Solid Electrolyte, Kezheng Chen; Sae Shinjo; Atsushi Sakuda; Kentaro Yamamoto; Tomoki Uchiyama; Kentaro Kuratani; Tomonari Takeuchi; Yuki Orikasa; Akitoshi Hayashi; Masahiro Tatsumisago; Yuta Kimura; Takashi Nakamura; Koji Amezawa; Yoshiharu Uchimoto, Feb. 2019, 123, 6, 3292, 3298, Scientific journal, 10.1021/acs.jpcc.8b09569
URL DOI URL Scopus URL Scopus Citedby URL

Refereed, SOLID STATE IONICS, Effect of introducing interlayers into electrode/electrolyte interface in all solid-state battery using sulfide electrolyte, Chen, Kezheng; Yamamoto, Kentaro; Orikasa, Yuki; Uchiyama, Tomoki; Ito, Yusuke; Yubuchi, So; Hayashi, Akitoshi; Tatsumisago, Masahiro; Nitta, Kiyofumi; Uruga, Tomoya; Uchimoto, Yoshiharu, Dec. 2018, 327, 150, 156, Scientific journal, 10.1016/j.ssi.2018.10.010
DOI URL

Refereed, ACS Applied Energy Materials, American Chemical Society ({ACS}), High Rate Performance of Dual-Substituted LiFePO4 Based on Controlling Metastable Intermediate Phase, Takahiro Yoshinari; Kentaro Yamamoto; Motoaki Nishijima; Katsutoshi Fukuda; Akihide Kuwabara; Isao Tanaka; Kazuhiko Maeda; Hiroshi Kageyama; Yuki Orikasa; Yoshiharu Uchimoto, Dec. 2018, 1, 12, 6736, 6740, Scientific journal, 10.1021/acsaem.8b01603
URL DOI URL Scopus URL Scopus Citedby URL

Refereed, The Journal of Physical Chemistry C, American Chemical Society ({ACS}), Role of Coordination Structure of Magnesium Ions on Charge and Discharge Behavior of Magnesium Alloy Electrode, Masashi Hattori; Kentaro Yamamoto; Masaki Matsui; Koji Nakanishi; Toshihiko Mandai; Ashu Choudhary; Yoshitaka Tateyama; Keitaro Sodeyama; Tomoki Uchiyama; Yuki Orikasa; Yusuke Tamenori; Tatsuya Takeguchi; Kiyoshi Kanamura; Yoshiharu Uchimoto, Nov. 2018, 122, 44, 25204, 25210, Scientific journal, 10.1021/acs.jpcc.8b08558
URL DOI URL Scopus URL Scopus Citedby URL

Refereed, Journal of Surface Analysis, Investigation of charge compensation mechanism of LiNi1/3Co1/3Mn1/3O2 Positive Electrode during Initial Charge Process by Operando Soft X-ray XAFS Measurement, 中西康次; 中西康次; 北田耕嗣; 北田耕嗣; 森田善幸; 谷田肇; 為則雄祐; 鶴田一樹; 家路豊成; 折笠有基; 山本健太郎; 内本喜晴; 小久見善八; 太田俊明, Aug. 2018, 25, 2, 90, 102

Refereed, ENERGY STORAGE MATERIALS, Grain-boundary-rich mesoporous NiTiO3 micro-prism as high tap-density, super rate and long life anode for sodium and lithium ion batteries, Huang, Zhen-Dong; Zhang, Ting-Ting; Lu, Hao; Masese, Titus; Yamamoto, Kentarou; Liu, Rui-Qing; Lin, Xiu-Jing; Feng, Xiao-Miao; Liu, Xian-Ming; Wang, Dan; Uchimoto, Yoshiharu; Ma, Yan-Wen, Jul. 2018, 13, 329, 339, Scientific journal, 10.1016/j.ensm.2017.08.012
DOI URL

Refereed, SCIENCE ADVANCES, Visualizing redox orbitals and their potentials in advanced lithium-ion battery materials using high-resolution x-ray Compton scattering, Hasnain Hafiz; Kosuke Suzuki; Bernardo Barbiellini; Yuki Orikasa; Vincent Callewaert; Staszek Kaprzyk; Masayoshi Itou; Kentaro Yamamoto; Ryota Yamada; Yoshiharu Uchimoto; Yoshiharu Sakurai; Hiroshi Sakurai; Arun Bansil, Aug. 2017, 3, 8, Scientific journal, 10.1126/sciadv.1700971
DOI URL

Refereed, JOURNAL OF PHYSICAL CHEMISTRY C, Dynamic Behavior at the Interface between Lithium Cobalt Oxide and an Organic Electrolyte Monitored by Neutron Reflectivity Measurements, Taketoshi Minato; Hiroyuki Kawaura; Masaaki Hirayama; Sou Taminato; Kota Suzuki; Norifumi L. Yamada; Hidetaka Sugaya; Kentaro Yamamoto; Koji Nakanishi; Yuki Orikasa; Hajime Tanida; Ryoji Kanno; Hajime Arai; Yoshiharu Uchimoto; Zempachi Ogumi, Sep. 2016, 120, 36, 20082, 20088, Scientific journal, 10.1021/acs.jpcc.6b02523
DOI URL

Not Refereed, APPLIED PHYSICS LETTERS, Identifying a descriptor for d-orbital delocalization in cathodes of Li batteries based on x-ray Compton scattering, B. Barbiellini; K. Suzuki; Y. Orikasa; S. Kaprzyk; M. Itou; K. Yamamoto; Yung Jui Wang; H. Hafiz; R. Yamada; Y. Uchimoto; A. Bansil; Y. Sakurai; H. Sakurai, Aug. 2016, 109, 7, Scientific journal, 10.1063/1.4961055
DOI URL

Refereed, SCIENTIFIC REPORTS, Ionic Conduction in Lithium Ion Battery Composite Electrode Governs Cross-sectional Reaction Distribution, Yuki Orikasa; Yuma Gogyo; Hisao Yamashige; Misaki Katayama; Kezheng Chen; Takuya Mori; Kentaro Yamamoto; Titus Masese; Yasuhiro Inada; Toshiaki Ohta; Zyun Siroma; Shiro Kato; Hajime Kinoshita; Hajime Arai; Zempachi Ogumi; Yoshiharu Uchimoto, May 2016, 6, Scientific journal, 10.1038/srep26382
DOI URL

Refereed, JOURNAL OF APPLIED PHYSICS, Non-destructive measurement of in-operando lithium concentration in batteries via x-ray Compton scattering, K. Suzuki; B. Barbiellini; Y. Orikasa; S. Kaprzyk; M. Itou; K. Yamamoto; Yung Jui Wang; H. Hafiz; Y. Uchimoto; A. Bansil; Y. Sakurai; H. Sakurai, Jan. 2016, 119, 2, Scientific journal, 10.1063/1.4939304
DOI URL

Refereed, JOURNAL OF PHYSICAL CHEMISTRY C, Crystal Structural Changes and Charge Compensation Mechanism during Two Lithium Extraction/Insertion between Li2FeSiO4 and FeSiO4, Titus Masese; Cedric Tassel; Yuki Orikasa; Yukinori Koyama; Hajime Arai; Naoaki Hayashi; Jungeun Kim; Takuya Mori; Kentaro Yamamoto; Yoji Kobayashi; Hiroshi Kageyama; Zempachi Ogumi; Yoshiharu Uchimoto, May 2015, 119, 19, 10206, 10211, Scientific journal, 10.1021/acs.jpcc.5b00362
DOI URL

Refereed, JOURNAL OF PHYSICAL CHEMISTRY C, Effect of an Electrolyte Additive of Vinylene Carbonate on the Electronic Structure at the Surface of a Lithium Cobalt Oxide Electrode under Battery Operating Conditions, Daiko Takamatsu; Yuki Orikasa; Shinichiro Mori; Takayuki Nakatsutsumi; Kentaro Yamamoto; Yukinori Koyama; Taketoshi Minato; Tatsumi Hirano; Hajime Tanida; Hajime Arai; Yoshiharu Uchimoto; Zempachi Ogumi, May 2015, 119, 18, 9791, 9797, Scientific journal, 10.1021/jp511405g
DOI URL

Refereed, PHYSICAL REVIEW LETTERS, Extracting the Redox Orbitals in Li Battery Materials with High-Resolution X-Ray Compton Scattering Spectroscopy, K. Suzuki; B. Barbiellini; Y. Orikasa; N. Go; H. Sakurai; S. Kaprzyk; M. Itou; K. Yamamoto; Y. Uchimoto; Yung Jui Wang; H. Hafiz; A. Bansil; Y. Sakurai, Feb. 2015, 114, 8, Scientific journal, 10.1103/PhysRevLett.114.087401
DOI URL

Refereed, RSC ADVANCES, Vanadium phosphate as a promising high-voltage magnesium ion (de)-intercalation cathode host, Zhen-Dong Huang; Titus Masese; Yuki Orikasa; Takuya Mori; Kentarou Yamamoto, 2015, 5, 12, 8598, 8603, Scientific journal, 10.1039/c4ra14416c
DOI URL

Refereed, ADVANCED MATERIALS INTERFACES, Origin of Surface Coating Effect for MgO on LiCoO2 to Improve the Interfacial Reaction between Electrode and Electrolyte, Yuki Orikasa; Daiko Takamatsu; Kentaro Yamamoto; Yukinori Koyama; Shinichiro Mori; Titus Masese; Takuya Mori; Taketoshi Minato; Hajime Tanida; Tomoya Uruga; Zempachi Ogumi; Yoshiharu Uchimoto, Dec. 2014, 1, 9, Scientific journal, 10.1002/admi.201400195
DOI URL

Refereed, ELECTROCHEMISTRY, Direct Observation of Rate Determining Step for Nd2NiO4+delta SOFC Cathode Reaction by operando Electrochemical XAS, Yuki Orikasa; Toshiaki Ina; Kentaro Yamamoto; Takayuki Nakao; Atsushi Mineshige; Koji Amezawa; Tatsuya Kawada; Hajime Tanida; Tomoya Uruga; Yoshiharu Uchimoto, Oct. 2014, 82, 10, 897, 900, Scientific journal, 10.5796/electrochemistry.82.897
DOI URL

Refereed, ELECTROCHEMISTRY, Stabilization of the Electronic Structure at the Cathode/Electrolyte Interface via MgO Ultra-thin Layer during Lithium-ions Insertion/Extraction, Kentaro Yamamoto; Yuki Orikasa; Daiko Takamatsu; Yukinori Koyama; Shinichiro Mori; Titus Masese; Takuya Mori; Taketoshi Minato; Hajime Tanida; Tomoya Uruga; Zempachi Ogumi; Yoshiharu Uchimoto, Oct. 2014, 82, 10, 891, 896, Scientific journal, 10.5796/electrochemistry.82.891
DOI URL

Refereed, SOLID STATE IONICS, Local structural change in Li2FeSiO4 polyanion cathode material during initial cycling, Titus Masese; Yuki Orikasa; Takuya Mori; Kentaro p Yamamoto; Toshiaki Ina; Taketoshi Minato; Koji Nakanishi; Toshiaki Ohta; Cedric Tassel; Yoji Kobayashi; Hiroshi Kageyama; Hajime Arai; Zempachi Ogumi; Yoshiharu Uchimoto, Sep. 2014, 262, 110, 114, Scientific journal, 10.1016/j.ssi.2013.11.018
DOI URL

Refereed, SCIENTIFIC REPORTS, High energy density rechargeable magnesium battery using earth-abundant and non-toxic elements, Yuki Orikasa; Titus Masese; Yukinori Koyama; Takuya Mori; Masashi Hattori; Kentaro Yamamoto; Tetsuya Okado; Zhen-Dong Huang; Taketoshi Minato; Cedric Tassel; Jungeun Kim; Yoji Kobayashi; Takeshi Abe; Hiroshi Kageyama; Yoshiharu Uchimoto, Jul. 2014, 4, Scientific journal, 10.1038/srep05622
DOI URL

Refereed, JOURNAL OF PHYSICAL CHEMISTRY C, Improved Cyclic Performance of Lithium-Ion Batteries: An Investigation of Cathode/Electrolyte Interface via In Situ Total-Reflection Fluorescence X-ray Absorption Spectroscopy, Kentaro Yamamoto; Taketoshi Minato; Shinichiro Mori; Daiko Takamatsu; Yuki Orikasa; Hajime Tanida; Koji Nakanishi; Haruno Murayama; Titus Masese; Takuya Mori; Hajime Arai; Yukinori Koyama; Zempachi Ogumi; Yoshiharu Uchimoto, May 2014, 118, 18, 9538, 9543, Scientific journal, 10.1021/jp5011132
DOI URL

Refereed, CHEMISTRY OF MATERIALS, Relationship between Phase Transition Involving Cationic Exchange and Charge-Discharge Rate in Li2FeSiO4, Titus Masese; Yuki Orikasa; Cedric Tassel; Jungeun Kim; Taketoshi Minato; Hajime Arai; Takuya Mori; Kentaro Yamamoto; Yoji Kobayashi; Hiroshi Kageyama; Zempachi Ogumi; Yoshiharu Uchimoto, Feb. 2014, 26, 3, 1380, 1384, Scientific journal, 10.1021/cm403134q
DOI URL

Refereed, CHEMISTRY-A EUROPEAN JOURNAL, Reversible Pore Size Control of Elastic Microporous Material by Mechanical Force, Masashi Ito; Hirotomo Nishihara; Kentaro Yamamoto; Hiroyuki Itoi; Hideki Tanaka; Akira Maki; Minoru T. Miyahara; Seung Jae Yang; Chong Rae Park; Takashi Kyotani, Sep. 2013, 19, 39, 13009, 13016, Scientific journal, 10.1002/chem.201301806
DOI URL

Refereed, RSC ADVANCES, A novel cationic-ordering fluoro-polyanionic cathode LiV0.5Fe0.5PO4F and its single phase Li+ insertion/extraction behaviour, Zhen-Dong Huang; Yuki Orikasa; Titus Masese; Kentaro Yamamoto; Takuya Mori; Taketoshi Minato; Yoshiharu Uchimoto, 2013, 3, 45, 22935, 22939, Scientific journal, 10.1039/c3ra44094j
DOI URL

MISC

電気化学会大会講演要旨集(CD-ROM), operando X-ray Absorption Spectroscopic Study of Pt nanowire catalysts under Oxygen Reduction Reaction, 内山智貴; CAO Weijie; 山本健太郎; 松永利之; 寺西利治; 佐藤良太; 今井英人; 櫻井吉晴; 辻庸一郎; 内本喜晴, 2022, 89th

電池討論会PDF要旨集(CD-ROM), Operando X-ray absorption spectroscopy of Pt catalyst and PtCo catalyst in polymer electrolyte fuel cell under high temperature and low humidity operating conditions, 小林照; 内山智貴; 柿沼克良; 山本健太郎; 松永利之; 松本匡史; 今井英人; 櫻井吉晴; 朝岡賢彦; 辻庸一郎; 内本喜晴, 2022, 63rd

固体イオニクス討論会講演要旨集, Fluoride Ion Insertion/extraction Mechanism in Cu₃N Cathode of All-Solid-State Fluoride Rechargeable Batteries, 山本健太郎; 山本健太郎; ZHANG Datong; 木内久雄; 中西康次; 内山智貴; 渡邊稔樹; 高見剛; 松永利之; 三木秀教; 井手一人; 射場英紀; 前田和彦; 原田慈久; 陰山洋; 内本喜晴, 2022, 48th

固体イオニクス討論会講演要旨集, Electrochemical properties of (Ba,Sr)FeO₂ cathode with infinite layer structure, WANG Yanchang; 山本健太郎; 山本健太郎; 松永利之; 中西康次; 内山智貴; 渡邊稔樹; 高見剛; 三木秀教; 射場英紀; 前田和彦; 陰山洋; 内本喜晴, 2022, 48th

電池討論会PDF要旨集(CD-ROM), Development of intercalation-type cathode materials for fluoride ion batteries: 11: Evaluation of electrochemical performance of (Ba, Sr)FeO₂ cathode with infinite layer structure, WANG Yanchang; 山本健太郎; 山本健太郎; 松永利之; 中西康次; 内山智貴; 渡邊稔樹; 高見剛; 三木秀教; 射場英紀; 前田和彦; 陰山洋; 内本喜晴, 2022, 63rd

電池討論会PDF要旨集(CD-ROM), Investigation of water vapor degradation mechanism of sulfide solid electrolytes by in situ soft x-ray absorption spectroscopy, 山本健太郎; 山本健太郎; 邉見光紀; 渡邊稔樹; 佐野光; 中西康次; 内山智貴; 松永利之; 高見剛; 作田敦; 林晃敏; 辰巳砂昌弘; 川本浩二; 内本喜晴, 2022, 63rd

電池討論会PDF要旨集(CD-ROM), Development of intercalation-type cathode materials for fluoride ion batteries: 6: Elucidation of ionic conduction pathway in La_1.2Sr_1.8Mn₂O₇ using neutron MEM analysis, 松永利之; LI Zhuoran; 三木秀教; 山本健太郎; 内山智貴; 渡邊稔樹; 高見剛; 射場英紀; 小林慎太郎; 河口彰吾; 池田一貴; 齊藤高志; 鳥居周輝; 萩原雅人; 神山崇; 陰山洋; 内本喜晴, 2021, 62nd

固体イオニクス討論会講演要旨集, Elucidation of ionic conduction pathway in La_1.2Sr_1.8Mn₂O₇ using neutron MEM analysis, 松永利之; LI Zhuoran; 三木秀教; 山本健太郎; 内山智貴; 渡邊稔樹; 高見剛; 射場英紀; 小林慎太郎; 河口彰吾; 池田一貴; 齊藤高志; 鳥居周輝; 萩原雅人; 神山崇; 陰山洋; 内本喜晴, 2021, 47th (CD-ROM)

電池討論会PDF要旨集(CD-ROM), Operando X-ray absorption spectroscopy of Pt catalyst in polymer electrolyte fuel cell under high temperature operating conditions, 小林照; 内山智貴; 柿沼克良; 山本健太郎; 松永利之; 松本匡史; 今井英人; 櫻井吉晴; 朝岡賢彦; 辻庸一郎; 内本喜晴, 2021, 62nd

電池討論会PDF要旨集(CD-ROM), The influence of ionomer towards to the ORR activity of Pt/C catalyst, 内山智貴; CAO Weijie; 山本健太郎; 松永利之; 寺西利治; 佐藤良太; 今井英人; 櫻井吉晴; 辻庸一郎; 内本喜晴, 2021, 62nd

電池討論会PDF要旨集(CD-ROM), X-ray Absorption Spectroscopic Study of Pt Nanowire catalyst under oxygen reduction reaction, 内山智貴; CAO Weijie; 山本健太郎; 松永利之; 寺西利治; 佐藤良太; 今井英人; 櫻井吉晴; 辻庸一郎; 内本喜晴, 2021, 62nd

電池討論会PDF要旨集(CD-ROM), Charge Compensation Mechanism in Cu₃N Cathode of All-Solid-State Fluoride Secondary Batteries, 山本健太郎; ZHANG Datong; 木内久雄; 中西康次; 内山智貴; 渡邊稔樹; 高見剛; 松永利之; 三木秀教; 井手一人; 射場英紀; 前田和彦; 原田慈久; 陰山洋; 内本喜晴, 2021, 62nd

電池討論会PDF要旨集(CD-ROM), Development of intercalation-type cathode materials for fluoride ion batteries: 9: Electrochemical performance of (Ca, Sr)FeO₂ cathode with infinite layer structure, 山本健太郎; WANG Yanchang; 阪口祐紀; 木内久雄; 松永利之; 中西康次; 内山智貴; 渡邊稔樹; 高見剛; 三木秀教; 射場英紀; 前田和彦; 原田慈久; 陰山洋; 内本喜晴, 2021, 62nd

電池討論会PDF要旨集(CD-ROM), Development of intercalation-type cathode materials for fluoride ion batteries: 8: Mechanism analysis of fluoride ion (de)insertion behavior for cathode material SrFeO₂ with infinite layer structure, WANG Yanchang; 山本健太郎; 宮脇淳; 松永利之; 木内久雄; 中西康次; 壬生攻; 内山智貴; 渡邊稔樹; 高見剛; 三木秀教; 射場英紀; 前田和彦; 原田慈久; 陰山洋; 内本喜晴, 2021, 62nd

電池討論会PDF要旨集(CD-ROM), Development of Intercalation-type Cathode Materials for Fluoride Ion Batteries: 5: Reaction Mechanism of Excess Fluoride Ion Insertion into La_1.2Sr_1.8Mn₂O₇F₂, 三木秀教; 山本健太郎; 宮脇淳; 桑原彰秀; 中西康次; 内山智貴; 松永利之; 渡邊稔樹; 高見剛; 射場英紀; 原田慈久; 陰山洋; 内本喜晴, 2021, 62nd

固体イオニクス討論会講演要旨集, Intercalation/deintercalation Reaction Mechanism of Fluoride Ions in (Ca, Sr)FeO₂ Cathode with Infinite Layer Structure for All-solid-state Fluoride Ion Battery, 山本健太郎; WANG Yanchang; 阪口祐紀; 木内久雄; 松永利之; 中西康次; 内山智貴; 渡邊稔樹; 高見剛; 三木秀教; 射場英紀; 前田和彦; 原田慈久; 陰山洋; 内本喜晴, 2021, 47th (CD-ROM)

電池討論会PDF要旨集(CD-ROM), Elucidation of reaction mechanism of Li₂S-V₂S₃-LiI binary functional cathode for all-solid-state batteries, 渡邊稔樹; XIAO Yao; 山本健太郎; PAN Wenli; 内山智貴; 上杉健太朗; 竹内晃久; 作田敦; 林晃敏; 辰巳砂昌弘; 高見剛; 松永利之; 内本喜晴, 2021, 62nd

Not Refereed, Jun. 2020, 40, 6, 1, 7

電池討論会PDF要旨集(CD-ROM), Elucidation of reaction mechanism at the anode/electrolyte interface in Mg[B(HFIP₄)]₂ electrolytes, FEILURE Tuerxun; 山本健太郎; 万代俊彦; 館山佳尚; 中西康次; 内山智貴; 渡邊稔樹; 金村聖志; 内本喜晴, 2020, 61st

電気化学会大会講演要旨集(CD-ROM), Magnesium deposition mechanism in the magnesium battery electrolyte with weakly coordinated anions, 山本健太郎; FEILURE Tuerxun; 万代俊彦; 中西康次; 袖山慶太郎; 館山佳尚; 内山智貴; 松永利之; 金村聖志; 内本喜晴, 2020, 87th

固体イオニクス討論会講演要旨集, Effect of properties of solvents used for liquid phase synthesis to lithium ion conductivity, 高橋勝國; 高橋勝國; YANG Seunghoon; 山本健太郎; 尾原幸治; 渡邊稔樹; 内山智貴; 作田敦; 林晃敏; 辰巳砂昌弘; 引間和浩; 武藤浩行; 松田厚範; 内本喜晴, 2020, 46th (CD-ROM)

電池討論会PDF要旨集(CD-ROM), Effect of annealing conditions to the local structure and the lithium ion conductivity of Li₂S-P₂S₅-based electrolytes synthesized by using ethyl propionate, 高橋勝國; YANG Seunghoon; 山本健太郎; 尾原幸治; 渡邊稔樹; 内山智貴; 作田敦; 林晃敏; 辰巳砂昌弘; 引間和浩; 武藤浩行; 松田厚範; 内本喜晴, 2020, 61st

電池討論会PDF要旨集(CD-ROM), Solvent effect on local structure and lithium ion conductivity of liquid phase synthesized Li₂S-P₂S₅-based electrolytes, 山本健太郎; YANG Seunghoon; 高橋勝國; 尾原幸治; 渡邊俊樹; 内山智貴; 作田敦; 林晃敏; 辰巳砂昌弘; 引間和浩; 武藤浩行; 松田厚範; 内本喜晴, 2020, 61st

2020, 126th

2020, 126th

電池討論会PDF要旨集(CD-ROM), Effect of the water/alcohol ratio of the dispersion on morphology and proton transport cast Nafion thin films on Pt electrodes, 山本健太郎; GAO Xiao; 平井智康; 太田昇; 内山智貴; 渡邊稔樹; 今井英人; 菅原生豊; 篠原和彦; 内本喜晴, 2020, 61st

電池討論会PDF要旨集(CD-ROM), Elucidation of reaction mechanism at the anode/electrolyte interface in Mg(TFSA)₂ and Mg(BH₄)₂ electrolytes, FAILURE Tuerxun; 服部将司; 山本健太郎; 万代俊彦; 松井雅樹; 袖山慶太郎; 館山佳尚; 中西康次; 内山智貴; 松永利之; 金村聖志; 内本喜晴, 2019, 60th

電池討論会PDF要旨集(CD-ROM), Reaction mechanism of sulfur encapsulated porous carbon observed by operando soft X-ray absorption spectroscopy, 鈴木宏睦; XIAO Yao; 山本健太郎; 松井由紀子; 中西康次; 内山智貴; 松永利之; 石川正司; 内本喜晴, 2019, 60th

電解技術討論会(ソーダ工業技術討論会)講演要旨集, Development of operando techniques on X-ray absorption spectroscopy under oxygen evolution reaction by flow-type cell, 内山智貴; 山口竜晴; 中西康次; 中西康次; 錦善則; 山本健太郎; 松永利之; 内本喜晴, 2019, 43rd

電解技術討論会(ソーダ工業技術討論会)講演要旨集, The effect of cation mixing on activity and durability toward oxygen evolution reaction in LiNiO₂, 山口竜晴; 内山智貴; 中西康次; 中西康次; 山本健太郎; 松永利之; 内本喜晴, 2019, 43rd

2019, 86th

2019, 45th

電池討論会PDF要旨集(CD-ROM), Suppression of Li metal dendrite growth by interfacial modification between Li metal anode/solid electrolyte, MU Zhiwei; 高橋勝國; XIAO Yao; 鈴木宏睦; 山本健太郎; 内山智貴; 上杉健太朗; 竹内晃久; 作田敦; 林晃敏; 辰巳砂昌弘; 松永利之; 内本喜晴, 2019, 60th

電池討論会PDF要旨集(CD-ROM), Direct observation of Li metal dendrite growth in all-solid-state batteries by operando CT measurement, MU Zhiwei; 高橋勝國; XIAO Yao; 鈴木宏睦; 山本健太郎; 内山智貴; 上杉健太朗; 竹内晃久; 作田敦; 林晃敏; 辰巳砂昌弘; 松永利之; 内本喜晴, 2019, 60th

電池討論会PDF要旨集(CD-ROM), Relationship between the local structure and lithium ionic conductivity of Li₂S-P₂S₅ solid electrolyte by pair distribution function analysis, 高橋勝國; YANG Seunghoon; 山本健太郎; PHUC Nguyen Huu Huy; 尾原幸治; 内山智貴; 作田敦; 林晃敏; 辰巳砂昌弘; 武藤浩行; 松田厚範; 松永利之; 内本喜晴, 2019, 60th

電池討論会PDF要旨集(CD-ROM), The correlation between proton conductivity and morphology of Nafion thin-film on Pt electrode, GAO Xiao; 山本健太郎; 平井智康; 内山智貴; 高尾直樹; 片山翔太; 今井英人; 菅原生豊; 篠原和彦; 松永利之; 内本喜晴, 2019, 60th

電池討論会PDF要旨集(CD-ROM), The influence of usage amount of ionomer towards to the ORR activity of Pt/C catalyst, LIU Chen; 内山智貴; 山本健太郎; 高尾直樹; 今井英人; 片山翔太; 菅原生豊; 篠原和彦; 内本喜晴, 2019, 60th

電解技術討論会(ソーダ工業技術討論会)講演要旨集, The correlation between proton conductivity and morphology of Nafion thin-film on Pt electrode in polymer electrolyte fuel cells, GAO Xiao; 山本健太郎; 平井智康; 内山智貴; 高尾直樹; 片山翔太; 今井英人; 菅原生豊; 篠原和彦; 松永利之; 内本喜晴, 2019, 43rd

Not Refereed, 2019, 87, 夏, 154, 164

2018, 85th

電池討論会講演要旨集, Clarification for reaction mechanism of sulfur encapsulated microporous carbon by operando soft X-ray absorption spectroscopy, 鈴木宏睦; 山本健太郎; 松井由紀子; 中西康次; 内山智貴; 石川正司; 内本喜晴, 2018, 59th

2018, 44th

2018, 44th

電池討論会講演要旨集, Mechanism analysis of liquid phase synthesis of Li₂S-P₂S₅ solid electrolyte by high energy X-ray diffraction measurement, 高橋勝國; 山本健太郎; PHUC Nguyen Huu Huy; 尾原幸治; 内山智貴; 作田敦; 林晃敏; 辰巳砂昌弘; 武藤浩行; 松田厚範; 内本喜晴, 2018, 59th

2018, 122nd

2018, 122nd

2018, 42nd

2018, 42nd

電池討論会講演要旨集, Elucidation of the effect of oxygen coverage and ionomer on ORR activity of Pt/C catalyst, 長田憲幸; 内山智貴; 山本健太郎; 高尾直樹; 今井英人; 片山翔太; 菅原生豊; 篠原和彦; 内本喜晴, 2018, 59th

電池討論会講演要旨集, Temperature dependence on oxygen reduction reaction for carbon-supported Pd-core/Pt-shell nanopartical electrocatalysts with different partical size, LIU Chen; 内山智貴; 山本健太郎; 高尾直樹; 今井英人; 片山翔太; 菅原生豊; 篠原和彦; 内本喜晴, 2018, 59th

電池討論会講演要旨集, Correlation between morphology and proton conductivity in Nafion thin-film with various thicknesses., GAO Xiao; 山本健太郎; 平井智康; 内山智貴; 高尾直樹; 片山翔太; 今井英人; 菅原生豊; 篠原和彦; 内本喜晴, 2018, 59th

2018, 64th

2017, 84th

2017, 84th

2017, 63rd

2017, 19th

2017, 19th

電池討論会講演要旨集, Clarification of Oxygen Redox mechanism in Lithium-Rich Cathode by operando Soft and Hard X-Ray Absorption Spectroscopy, 山本健太郎; 藪内直明; 中西康次; 中本康介; 内山智貴; 山本梨乃; 小林佑輝; 吉成崇宏; 渡辺有人; PARK Jiwon; BYON Hye Ryung; 太田俊明; 内本喜晴, 2017, 58th

電池討論会講演要旨集, Charge Compensation Process of Oxide ions in Lithium-Excess metal oxide of Mn-P by operando Soft X-Ray Absorption Spectroscopy, 山本梨乃; 藪内直明; 中西康次; 山本健太郎; 澤村美穂; 中本康介; 内山智貴; 為則雄祐; 太田俊明; 内本喜晴, 2017, 58th

電池討論会講演要旨集, Elucidation of reaction mechanism at the anode/electrolyte interface in Mg(TFSA)₂ and Mg(BH₄)₂-based electrolytes, 服部将司; 中西康次; 山本健太郎; 中本康介; 内山智貴; 松井雅樹; 内本喜晴, 2017, 58th

2017, 43rd

2017, 41st

2017, 41st

2017, 43rd

電池討論会講演要旨集, Nafion/electrode interfacial structure analyzed via operando grazing incidence X-ray scattering spectroscopy and X-ray absorption spectroscopy, GAO Xiao; 高橋勝国; LIU Chen; 山本健太郎; 内山智貴; 中本康介; 谷田肇; 高尾直樹; 松本匡史; 今井英人; 与儀千尋; 横山浩司; 菅原生豊; 篠原和彦; 大木真里亜; 内本喜晴, 2017, 58th

電池討論会講演要旨集, High-energy XRD, XAFS and TEM analysis of Pt/C cathode catalyst in degraded MEA, 高橋勝國; 尾原幸治; 内山智貴; 中本康介; 山本健太郎; 谷田肇; 今井英人; 横山浩司; 大木真里亜; 菅原生豊; 篠原和彦; 内本喜晴, 2017, 58th

電池討論会講演要旨集, Temperature dependence on oxygen reduction reaction for carbon-supported Pd-core/Pt-shell electrocatalysts, LIU Chen; 内山智貴; 中本康介; 山本健太郎; 谷田肇; 高尾直樹; 今井英人; 横山浩司; 菅原生豊; 篠原和彦; 内本喜晴, 2017, 58th

2017, 41st

2017, 41st

Not Refereed, X線分析の進歩, Development of in situ Soft X-Ray Absorption Spectroscopy Technique for Light Element Analysis in Lithium Ion Secondary Batteries, 中西康次; 中西康次; 谷田肇; 小松秀行; 小松秀行; 高橋伊久磨; 高橋伊久磨; 為則雄祐; 鶴田一樹; 家路豊成; 吉村真史; 山中恵介; 菊崎将太; 折笠有基; 折笠有基; 小島一男; 山本健太郎; 内本喜晴; 小久見善八; 太田俊明, 2017, 48, 403, 416

2016, 57th

2016, 57th

2016, 57th

2016, 42nd

2016, 57th

2016, 83rd

2016, 57th

2016, 57th

2016, 57th

2015, 82nd

2015, 56th

2015, 41st

2015, 56th

Books etc

Interface ionics : for all-solid-state batteries and solid state ionics devices, Springer, Iriyama, Yasutoshi; Amezawa Koji; Tateyama Yoshitaka; Yabuuchi Naoaki, pp. 175-184, 2024, xi, 565 pages, 9789819760381
CiNii Books URL

Jul. 2023, 38, 3, 10, 427, 8p, 9784860438364
CiNii Books URL

2021

Next Generation Batteries: Realization of High Energy Density Rechargeable Batteries (English Edition) 1st ed., Springer Nature Singapore Pte Ltd., Chapter 15, XAFS Analysis, 2021

2019

Presentations

23 Mar. 2016 - 25 Mar. 2106

Kentaro Yamamoto; Shinichiro Mori; Daiko Takamatsu; Yuki Orikasa; Taketoshi Minato; Titus Masese; Takuya Mori; Hajime Tanida; Hajime Arai; Ogumi Zempachi; Uchimoto Yoshiharu, The 7th Asian Conference on Electrochemical Power Sources, ELECTRONIC STRUCTURE AT ELECTRODE/ELECTROLYTE INTERFACE OF LiFePO4 AND LiCoO2, 24 Nov. 2013 - 27 Nov. 2103

28 Mar. 2023, 27 Mar. 2023 - 29 Mar. 2023

08 Jan. 2023

08 Dec. 2022

09 Nov. 2022

08 Nov. 2022

06 Nov. 2022

07 Oct. 2022

Kentaro Yamamoto; Yanchang Wang; Yuki Sakaguchi; Hisao Kiuchi; Toshiyuki Matsunaga; Koji Nakanishi; Tomoki Uchiyama; Toshiki Watanabe; Tsuyoshi Takami; Hidenori Miki; Hideki Iba; Kazuhiko Maeda; Yoshihisa Harada; Hiroshi Kageyama; Yoshiharu Uchimoto, The 21th International Meeting on Lithium Batteries, Electrochemical performance of (Ca, Sr)FeO2 cathode with infinite layer structure for all-solid-state fluoride ion battery, Jun. 2022

15 Mar. 2022 - 17 Mar. 2022

Kentaro Yamamoto; Xiao Gao; Tomoyasu Hirai; Noboru Ohta; Tomoki Uchiyama; Toshiki Watanabe; Hideto Imai; Seiho Sugawara; Kazuhiko Shinohara; Yoshiharu Uchimoto, MATERIALS RESEARCH MEETING 2021, Effect of alcohol/water ratio in dispersion on proton transport and morphology of cast perfluorinated sulfonic acid ionomers thin films, 13 Dec. 2021 - 16 Dec. 2021

08 Dec. 2021 - 10 Dec. 2021

Kentaro Yamamoto; Yanchang Wang; Yuki Sakaguchi; Hisao Kiuchi; Toshiyuki Matsunaga; Koji Nakanishi; Tomoki Uchiyama; Toshiki Watanabe; Tsuyoshi Takami; Hidenori Miki; Hideki Iba; Kazuhiko Maeda; Yoshihisa Harada; Hiroshi Kageyama; Yoshiharu Uchimoto, International Conference on Mixed-Anion Compounds, Electrochemical characterization and charge compensation mechanism of (Ca, Sr)FeO2 cathode with infinite layer structure, 07 Dec. 2021 - 10 Dec. 2021

30 Nov. 2021 - 02 Dec. 2021

30 Nov. 2021 - 02 Dec. 2021

30 Nov. 2021 - 02 Dec. 2021

30 Sep. 2021 - 30 Sep. 2021

Kentaro Yamamoto; Yao Xiao; Yukiko Matsui; Atsushi Sakuda; Koji Nakanishi; Tomoki Uchiyama; Toshiki Watanabe; Akitoshi Hayashi; Masahiro Tatsumisago; Masashi Ishikawa; Masayoshi Watanabe; Yoshiharu Uchimoto, International Conference on Lithium-Sulfur Batteries 2021, Clarification of reaction pathway difference of sulfur cathode between a concentrated liquid electrolyte and a solid-state electrolyte by soft X-way absorption spectroscopy, 28 Jun. 2021 - 01 Jul. 2021

08 Dec. 2020 - 09 Dec. 2020

18 Nov. 2020 - 20 Nov. 2020

17 Mar. 2020 - 19 Mar. 2020

Kentaro Yamamoto; Naoaki Yabuuchi; Koji Nakanishi; Tomoki Uchiyama; Rina Yamamoto; Yuki Orikasa; Yoshiharu Uchimoto, Materials research meeting 2019, Direct Observation of Anion Redox in Li-excess Oxides with Different Covalent and Ionic Characters by operando Soft/Hard X-ray Absorption Spectroscopy, 10 Dec. 2019 - 14 Dec. 2019

Kentaro Yamamoto; Feilure Tuerxun; Masashi Hattori; Toshihiko Mandai; Ashu Choudhary; Yoshitaka Tateyama; Keitaro Sodeyama; Tomoki Uchiyama; Kiyoshi Kanamura; Yoshiharu Uchimoto, Lithium Battery Discussions 2019, Coordination Structure Effect between Magnesium Ions and Anion at Negative Electrode/Electrolyte Interface for Magnesium Alloying Reaction, 15 Sep. 2019 - 20 Sep. 2019

Kentaro Yamamoto; Aruto Watanabe; Tomoki Uchiyama; Akitoshi Hayashi; Kazuhiko Maeda; Hiroshi Kageyama; Yoshiharu Uchimoto, 22nd International Conference on Solid State Ionics, Controlled oxide ions redox on Li-excess metal oxides by nitrogen-doping, 16 Jun. 2019 - 21 Jun. 2019

27 Nov. 2018 - 29 Nov. 2018

22 Nov. 2018 - 23 Nov. 2018

Kentaro Yamamoto; Naoaki Yabuuchi; Koji Nakanishi; Tomoki Uchiyama; Yuki Kobayashi; Rina Yamamoto; Yuki Orikasa; Toshiaki Ohta; Yoshiharu Uchimoto, Americas International Meeting on Electrochemistry and Solid State Science 2018, Charge compensation mechanism in Li-excess Oxides revealed by operando soft/hard X-ray absorption spectroscopy, 30 Sep. 2018 - 04 Oct. 2018

Kentaro Yamamoto; Takahiro Yoshinari; Eri Kato; Tomoki Uchiyama; Akihide Kuwabara; Kazuhiko Maeda; Hiroshi Kageyama; Yoshiharu Uchimoto, 16th Asian Conference on Solid State Ionics, Enhanced lithium ion transportation at the interface between LiFePO4 and electrolyte enhanced by surface-nitride treatment, 05 Aug. 2018 - 09 Aug. 2018

Kentaro Yamamoto; Naoaki Yabuuchi; Koji Nakanishi; Tomoki Uchiyama; Yuki Kobayashi; Rina Yamamoto; Yuki Orikasa; Hye Ryung Byon; Toshiaki Ohta; Yoshiharu Uchimoto, 12th International Conference on Ceramic Materials and Components for Energy and Environmental Applications, Anion Redox Mechanism in Li-Excess Oxides with Different Ionic or Covalent Characters, 22 Jul. 2018 - 27 Jul. 2018

Kentaro Yamamoto; Naoaki Yabuuchi; Koji Nakanishi; Tomoki Uchiyama; Yuki Kobayashi; Rina Yamamoto; Yuki Orikasa; Toshiaki Ohta; Yoshiharu Uchimoto, The 19th International Meeting on Lithium Batteries, Charge Compensation Mechanism in Li-Excess Oxides with Different Ionic or Covalent Characters, 17 Jun. 2018 - 22 Jun. 2018

Kentaro Yamamoto; Naoaki Yabuuchi; Koji Nakanishi; Tomoki Uchiyama; Takahiro Yoshinari; Yuki Kobayashi; Rina Yamamoto; Aruto Watanabe; Jiwon Park; Hye Ryung Byon; Toshiaki Ohta; Yoshiharu Uchimoto, International Battery Association 2018, Charge Compensation Mechanism in Lithium-excess Metal Oxides with Different Ionic or Covalent Characters, 11 Mar. 2018 - 16 Mar. 2018

09 Mar. 2018 - 11 Mar. 2018

05 Dec. 2017 - 07 Dec. 2017

21 Nov. 2017 - 22 Nov. 2017

20 Nov. 2017 - 21 Nov. 2017

14 Nov. 2017 - 16 Nov. 2017

Kentaro Yamamoto; Naoaki Yabuuchi; Koji Nakanishi; Tomoki Uchiyama; Kosuke Nakamoto; Takahiro Yoshinari; Yuki Kobayashi; Rina Yamamoto; Aruto Watanabe; Jiwon. Park; Hye Ryung Byon; Toshiaki Ohta; Yoshiharu Uchimoto, 10th International Conference on Advanced Lithium Batteries for Automobile Applications, Anion Redox in Lithium-Excess Metal Oxides with different ionic or covalent characters, 22 Oct. 2017 - 25 Oct. 2017

12 Sep. 2017 - 14 Sep. 2017

03 Jul. 2017 - 04 Jul. 2017

Kentaro Yamamoto; Koji Nakanishi; Naoaki Yabuuchi; Takahiro Yoshinari; Takanori Kobayashi; Yuki Kobayashi; Rina Yamamoto; Aruto Watanabe; Keisuke Yamanaka; Jiwon Park; Hye Ryung Byon; Yuki Orikasa; Yusuke Tamenori; Toshiaki Ohta; Yoshiharu Uchimoto, Lithium Battery Discussions 2017, Charge compensation mechanism in lithium-rich cathode materials with different ionic or covalent character, 11 Jun. 2017 - 16 Jun. 2017

25 Mar. 2017 - 27 Mar. 2017

03 Mar. 2017 - 03 Mar. 2017

05 Dec. 2016 - 07 Dec. 2016

25 Nov. 2015 - 27 Nov. 2015

16 Sep. 2015 - 18 Sep. 2015

30 Aug. 2015 - 01 Sep. 2015

Kentaro Yamamoto; Daiko Takamatsu; Yuki Orikasa; Hajime Tanida; Zempachi Ogumi; Yoshiharu Uchimoto, The 55th Battery Symposium in Japan, Operando X-ray Absorption Spectroscopic Study on Electrode / Electrolyte Interface, 19 Nov. 2014 - 21 Nov. 2014

19 Nov. 2014 - 21 Nov. 2014

Kentaro Yamamoto; Taketoshi Minato; Shinichiro Mori; Daiko Takamatsu; Yuki Orikasa; Hajime Tanida; Hajime Arai; Yukinori Koyama; Zempachi Ogumi; Yoshiharu Uchimoto, The 10th Japan-France Joint Seminar on Battery, Clarification of the Electronic Structure at LiCoO2 and LiFePO4/Electrolyte Interface via In-operando Total Reflection Fluorescence X-ray Absorption Spectroscopy, 22 Sep. 2014 - 24 Sep. 2014

31 Aug. 2014 - 02 Sep. 2014

Kentaro Yamamoto; Taketoshi Minato; Yuki Orikasa; Daiko Takamatsu; Titus Masese; Takuya Mori; Hajime Tanida; Zempachi Ogumi; Yoshiharu Uchimoto, 7th International Conference on Advanced Lithium Batteries for Automobile Applications, in operando XAFS study on electrode/electrolyte interface in LiFePO4 and LiCoO2, 29 Jul. 2014 - 01 Aug. 2014

Kentaro Yamamoto; Taketoshi Minato; Shinichiro Mori; Daiko Takamatsu; Yuki Orikasa; Hajime Tanida; Hajime Arai; Yukinori Koyama; Zempachi Ogumi; Yoshiharu Uchimoto, The 17th International Meeting on Lithium Batteries, Correlation between the electronic structure at electrode/electrolyte interface and durability in lithium-ion batteries, 10 Jun. 2014 - 14 Jun. 2014

29 Mar. 2014 - 31 Mar. 2014

12 Mar. 2014 - 12 Mar. 2014

Kentaro Yamamoto; Shinichiro Mori; Daiko Takamatsu; Yuki Orikasa; Taketoshi Minato; Hajime Tanida; Zempachi Ogumi; Yoshiharu Uchimoto, INTERNATIONAL BATTERY ASSOCIATION 2014, Investigation Of The Electronic Structure At Cathode/Electrolyte Interface In Lithium Ion Battery Via In-Situ Total-Reflection Fluorescence X-ray Absorption Spectroscopy, 03 Mar. 2014 - 07 Mar. 2014

07 Dec. 2013 - 07 Dec. 2013

20 Nov. 2013 - 22 Nov. 2013

Kentaro Yamamoto; Shinichiro Mori; Daiko Takamatsu; Yuki Orikasa; Taketoshi Minato; Hajime Tanida; Hajime Arai; Zempachi Ogumi; Yoshiharu Uchimoto, The 224th Meetings of ECS, Stability of the Electronic Structure at LiFePO4 Surface during Charge/Discharge Process, 27 Oct. 2013 - 01 Nov. 2013

07 Oct. 2013 - 09 Oct. 2013

07 Oct. 2013 - 09 Oct. 2013

08 Sep. 2013 - 10 Sep. 2013

Kentaro Yamamoto; Shinichiro Mori; Daiko Takamatsu; Yuki Orikasa; Taketoshi Minato; Hajime Tanida; Hajime Arai; Zempachi Ogumi; Yoshiharu Uchimoto, The 19th International Conference on Solid State Ionics, Reversible Change of the Electronic Structure of LiFePO4 surface during Charge/Discharge Process, 02 Jun. 2013 - 07 Jun. 2013

29 Mar. 2013 - 31 Mar. 2013

Mar. 2013 - Mar. 2013

12 Jan. 2013 - 14 Jan. 2013

03 Dec. 2012 - 05 Dec. 2012

01 Dec. 2012 - 01 Dec. 2012

02 Sep. 2012 - 04 Sep. 2012

08 Dec. 2011 - 08 Dec. 2011

29 Nov. 2011 - 01 Dec. 2011

01 Dec. 2010 - 03 Dec. 2010

25 Sep. 2010 - 26 Sep. 2010

Kentaro Yamamoto; Hirotomo Nishihara; Hiroyuki Itoi; Somlak Ittisanronnachai; Takashi Kyotani, Spring-like behavior of 3D graphene network, 20 Jul. 2010 - 21 Jul. 2010

Awards

Mar. 2025

Nov. 2022

Mar. 2022

Dec. 2013

The 7th Asian Conference on Electrochemical Power Sources, 1st Poster Prize, Nov. 2013

Nov. 2011

Research Projects

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Apr. 2022 - Mar. 2024, 22H04616, Studies on reaction layer at solid/solid interface by using operando X-ray reflectometry, 山本健太郎, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Kyoto University, 5200000, 4000000, 1200000, kaken
対象リソースIRI

基盤研究(B), Apr. 2021 - Mar. 2024, 21H02048, Principal investigator, 過剰なフッ化物イオンの挿入・脱離反応を利用した新規鉄系酸化物正極の創成, 山本健太郎, 日本学術振興会, 科学研究費助成事業基盤研究(B), 京都大学, 18070000, 13900000, 4170000, 本研究では酸化物アニオンのレドックスを用いた過剰なフッ化物イオンの挿入・脱離反応ならびにフッ化物イオンの拡散パスの制御により、超高容量・高出力のフッ化物イオン二次電池用正極を創成とその反応機構解明を行う。2021年度はCaxSr1-xFeO2（x = 0, 0.2, 0.4, 0.6, 0.8, 1.0）正極材料の合成とその電気化学特性評価、並びにフッ化物イオン挿入脱離前後のSrFeO2の結晶構造変化、電子構造変化の分析を行なった。SrFeO2は研究計画時に想定していた2個分のフッ化物イオン挿入時の容量（305 mAh g-1）よりも高い容量（350 mAhg-1）を示した。さらに検討した組成の中でCa0.8Sr0.2FeO2が最大の容量を示し、その値は500 mAhg-1を超える極めて高いものであった。CaxSr1-xFeO2（x = 0, 0.2, 0.4, 0.6, 0.8, 1.0）のいずれの組成においても305 mAhg-1よりも高い容量を示し、良好なサイクル特性を示した。フッ化物イオン挿入脱離後のSrFeO2に対して、放射光X線回折を行なったところ、初回充電後からはフッ化物イオンの挿入脱離に対して可逆的に結晶構造が変化しており、その体積膨張率が極めて小さいことが明らかとなった。また、O, F, Fe K-edgeのX線吸収分光測定の結果、充電初期にはFeが電荷補償を担い、充電後期にはOが電荷補償を担っていることが明らかとなった。さらにO K-edgeの共鳴非弾性 X 線散乱測定を行なったところ、Oが電荷補償担う際には分子状の酸素が形成していることが明らかとなった。, kaken
対象リソースIRI

基盤研究(B), Apr. 2020 - Mar. 2023, 20H02846, Coinvestigator, 酸素アニオン制御による新規電極反応を用いた高エネルギー密度正極材料の創造, 大石昌嗣; 尾原幸治; 山本健太郎, 日本学術振興会, 科学研究費助成事業基盤研究(B), 徳島大学, 18070000, 13900000, 4170000, 次世代リチウムイオン二次電池の高容量正極材料として、リチウム過剰系層状酸化物材料（Li2MnO3-LiMeO2, Me=Ni, Co, Mn）が注目されている。リチウム過剰系正極材料は、初期充電過程の結晶再配列により新規構造体が発現することで多量のLiイオンが可逆的に脱離挿入し高容量を示すと我々は考えている。本年度は、0.3Li2MnO3-0.7LiNi1/3Co1/3Mn1/3O2電極の評価を行った。作製した試料を活物質とした合剤電極を用いたセルはリチウム過剰系正極材料特有の挙動である初期充電時に電位平坦部を示し、その後の放電以降は可逆的な充放電サイクルを示した。1サイクルと20サイクルの放電容量が250 mAh g-1を超えており高容量正極特性を示した。充放電後のセルをグローブボックス内にて分解し、電極試料をキャピラリーに封入して、大気非暴露の状態で電極試料の全散乱測定を行った。Pair distribution function (PDF)解析により、充電・放電状態に関わらず短距離秩序は変化せず、金属層内に頑丈なMeO6八面体が存在することが示唆された。一方で初期充電過程の不可逆過程においてカチオンミキシングなどの局所的な構造乱れが導入されることも明らかになった。さらに、PDFデータの構造解析のための構造解析ソフトを独自に開発した。PDFデータの構造解析より、遷移金属層から移動したLi層内の金属カチオンがピラーとして存在するが高容量の発現に重要な役割を果たすことが明らかなった。, kaken
対象リソースIRI

新学術領域研究(研究領域提案型), Apr. 2020 - Mar. 2022, 20H05294, Principal investigator, オペランドX線反射率法を用いた蓄電固体界面イオンダイナミクスの解明, 山本健太郎, 日本学術振興会, 科学研究費助成事業新学術領域研究(研究領域提案型), 京都大学, 3900000, 3000000, 900000, 2021年度は2020年度までに開発した全固体電池における正極／固体電解質の界面構造の分析のためのオペランドX線反射率法をLiCoO2／Li1+xAlxTi2-x(PO4)3(LATP)モデル界面に対して適用し、高電位保持状態における界面反応相の成長過程の分析を行なった。充電前の初期状態において得られたX線反射率プロファイルの解析の結果、LiCoO2/LATPモデル界面には数nmの膜厚の初期被膜が形成していることが明らかとなった。定電流により4.2 V (Li+/Li基準相当)到達まで充電した直後に得られたX線反射率プロファイルの解析の結果、LiCoO2/LATPモデル界面には充電前の初期被膜とは別に数nmの膜厚の界面反応層が形成していることが明らかとなった。さらに4.2 V (Li+/Li基準相当)の電圧下で12 h保持した際に得られたX線反射率プロファイルの解析の結果、4 h未満の電圧保持では、界面反応層の膜厚は緩やかに増加し、界面反応層/LATP界面のラフネスは数nmの範囲で山なりに変化していた。このことから、4 h未満の電圧保持では界面反応層は島状に成長していることが明らかとなった。4 hを超えての電圧保持では界面反応層の膜厚は反応時間の平方根に比例しながら数十nmまで急激に増加し、界面反応層/LATP界面のラフネスは変化していなかった。このことから、4 hを超えての電圧保持では反応層は拡散成長していることが明らかとなった。オペランドX線反射率法により、全固体電池正極／固体電解質の高電圧下における界面反応層の成長形態を明らかにし、低抵抗な正極／固体電解質界面を設計するための基礎的な知見を得ることに成功した。, kaken
対象リソースIRI

Grant-in-Aid for Early-Career Scientists, Apr. 2018 - Mar. 2020, 18K14322, Principal investigator, Improved interfacial reaction between cathode and aqueous electrolyte in lithium-ion secondary batteries based on electrolyte structure control, Yamamoto Kentaro, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists, Kyoto University, 4160000, 3200000, 960000, Lithium-ion secondary batteries using highly concentrated aqueous electrolytes exhibit high rate characteristics in spite of the low ionic conductivity of the electrolyte. However, the mechanism of this behavior is not clearly understood. The purpose of this study is to understand electrochemical parameter of the reaction at the interface between cathode and electrolyte in a highly concentrated aqueous lithium-ion battery. The cathode reaction was divided into lithium ion diffusion in the cathode, interfacial reaction between cathode and electrolyte by using a thin-film cathode, and lithium ion diffusion in the bulk electrolyte, and the electrolyte concentration dependency was evaluated for electrochemical parameters of each process. It was found that the frequency factor of lithium ion insertion/extraction reaction at the interface was significantly improved at high concentrations, resulting in the high rate performance., url
対象リソースIRI

01 Apr. 2024 - 31 Mar. 2025, 固体電解質の還元限界電位の拡張に向けたコート材の研究2

次世代全固体蓄電池材料の評価・基盤技術開発, 01 Apr. 2023 - 31 Mar. 2026, Coinvestigator, 硬X線吸収分光法を用いた正極コート材料の劣化機構解明　in situ 軟X線吸収分光法を用いた硫化物固体電解質の水蒸気劣化／加熱回復機構解明

次世代全固体蓄電池材料の評価・基盤技術開発, 01 Oct. 2023 - 31 Mar. 2026, Coinvestigator, 高エネルギー密度を有する高温作動長寿命リチウム系電池の硬X線放射光解析

30 Nov. 2024, 次世代電池材料開発のための技術指導

01 Apr. 2021 - 31 Mar. 2023, 高エネルギー線を用いたLi-S電池硫黄系正極の充放電機構の解析, 国立研究開発法人科学技術振興機構, 先端的低炭素化技術開発 - 次世代蓄電池

KRI萌芽研究, 01 Apr. 2022 - 31 Jul. 2022, 次世代ハイニッケル正極の不安全現象の解明

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公益社団法人電気化学会関西支部関西電気化学研究会, 世話人, Jan. 2019 - Present

YAMAMOTO Kentaro

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■Ⅲ．社会連携活動実績

１．公的団体の委員等（審議会、国家試験委員、他大学評価委員，科研費審査委員等）