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Affiliation |
Faculty of Engineering, Division of Materials Science and Chemical Engineering |
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Job Title |
Professor |
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Research Fields, Keywords |
エネルギー, 固体化学, 電池 |
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Mail Address |
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Related SDGs |
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YABUUCHI Naoaki
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Degree 【 display / non-display 】
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Doctor of Engineering - Osaka City University
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Master of Engineering - Osaka City University
Campus Career 【 display / non-display 】
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2018.4
Duty Yokohama National UniversityFaculty of Engineering Division of Materials Science and Chemical Engineering Professor
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2018.4
Concurrently Yokohama National UniversityCollege of Engineering Science Department of Chemistry, Chemical Engineering and Life Science Professor
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2018.4
Concurrently Yokohama National UniversityGraduate school of Engineering Science Department of Chemistry, Chemical Engineering and Life Science Professor
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2018.4
Concurrently Yokohama National UniversityGraduate School of Engineering Department of Materials Science and Engineering Professor
External Career 【 display / non-display 】
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2014.4-2018.3
Tokyo Denki University Associate Professor
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2011.4-2013.3
Tokyo University of Science Lecturer
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2010.4-2011.3
Tokyo University of Science Assistant Professor
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2006.10-2008.9
Massachusetts Institute of Technology Postdoctoral Associate
Books 【 display / non-display 】
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月刊機能材料2022年7月号 特集ナトリウムイオン二次電池用部材の開発動向
藪内直明（ Role： Sole author , ナトリウムイオン電池用層状檀家物電極材料の研究）
CMC出版
Responsible for pages：15-22 Language：Japanese Book type：Scholarly book
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Transition Metal Oxides for Electrochemical Energy Storage
Naoaki Yabuuchi（ Role： Sole author , Chapter 6 “Anionic Redox Reaction in Li -Excess High-Capacity Transition-Metal Oxides”）
Wiley‐VCH GmbH
Responsible for pages：121-144 Language：English Book type：Scholarly book
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モビリティ用電池の化学
藪内直明（日本化学会 編集）（ Role： Contributor , 次世代高エネルギー密度正極材料（第Ⅱ部、5章））
化学同人 （ ISBN:9784759814040 ）
Total pages：200 Language：Japanese Book type：Scholarly book
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ナトリウムイオン電池用層状酸化物の研究開発
藪内直明（ Role： Joint author）
AndTech
Language：Japanese Book type：Scholarly book
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鈴木 隆之, 石丸 臣一, 小林 大祐, 保倉 明子, 宮坂 誠, 藪内 直明（ Role： Sole author）
東京電機大学出版局 （ ISBN:9784501631604 ）
Language：Japanese Book type：Scholarly book
Thesis for a degree 【 display / non-display 】
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Solid State Chemistry and Electrochemistry of LiCo1/3Ni1/3Mn1/3O2 for Advanced Lithium-Ion Batteries
2006.3
Doctoral Thesis Single Work
Papers 【 display / non-display 】
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Extended conjugated carbonyl-containing polymer as a negative electrode material for Na-ion batteries
Sugawara Kazuki, Yabuuchi Naoaki, Miyasaka Makoto
POLYMER JOURNAL 54 ( 9 ) 1111 - 1118 2022.9 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
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Unexpectedly Large Contribution of Oxygen to Charge Compensation Triggered by Structural Disordering: Detailed Experimental and Theoretical Study on a Li₃NbO₄–NiO Binary System
福間 隆太朗, 原田 真帆, 趙 文文, 澤村 美穂, 野田 祐輔, 中山 将伸, 後藤 真人, 菅 大介, 島川 祐一, 米村 雅雄, 池田 直宏, 綿貫 竜太, 福山 小百合, 韓 貞姫, 福満 … Show more authors
福間 隆太朗, 原田 真帆, 趙 文文, 澤村 美穂, 野田 祐輔, 中山 将伸, 後藤 真人, 菅 大介, 島川 祐一, 米村 雅雄, 池田 直宏, 綿貫 竜太, 福山 小百合, 韓 貞姫, 福満 仁志, 山中 恵介, 山岸 弘奈, 太田 俊明, 藪内 直明 Hide authors
ACS Central Science 8 ( 6 ) 775 - 794 2022.6
Language：English Publishing type：Research paper (scientific journal) Publisher：American Chemical Society (ACS) Joint Work
Dependence on lithium-ion batteries for automobile applications is rapidly increasing. The emerging use of anionic redox can boost the energy density of batteries, but the fundamental origin of anionic redox is still under debate. Moreover, to realize anionic redox, many reported electrode materials rely on manganese ions through π-type interactions with oxygen. Here, through a systematic experimental and theoretical study on a binary system of Li₃NbO₄–NiO, we demonstrate for the first time the unexpectedly large contribution of oxygen to charge compensation for electrochemical oxidation in Ni-based materials. In general, for Ni-based materials, e.g., LiNiO₂, charge compensation is achieved mainly by Ni oxidation, with a lower contribution from oxygen. In contrast, for Li₃NbO₄–NiO, oxygen-based charge compensation is triggered by structural disordering and σ-type interactions with nickel ions, which are associated with a unique environment for oxygen, i.e., a linear Ni–O–Ni configuration in the disordered system. Reversible anionic redox with a small hysteretic behavior was achieved for LiNi₂/₃Nb₁/₃O₂ with a cation-disordered Li/Ni arrangement. Further Li enrichment in the structure destabilizes anionic redox and leads to irreversible oxygen loss due to the disappearance of the linear Ni–O–Ni configuration and the formation of unstable Ni ions with high oxidation states. On the basis of these results, we discuss the possibility of using σ-type interactions for anionic redox to design advanced electrode materials for high-energy lithium-ion batteries.
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Unexpectedly Large Contribution of Oxygen to Charge Compensation Triggered by Structural Disordering: Detailed Experimental and Theoretical Study on a Li3NbO4-NiO Binary System
Fukuma Ryutaro, Harada Maho, Zhao Wenwen, Sawamura Miho, Noda Yusuke, Nakayama Masanobu, Goto Masat … Show more authors
Fukuma Ryutaro, Harada Maho, Zhao Wenwen, Sawamura Miho, Noda Yusuke, Nakayama Masanobu, Goto Masato, Kan Daisuke, Shimakawa Yuichi, Yonemura Masao, Ikeda Naohiro, Watanuki Ryuta, Andersen Henrik L., D'Angelo Anita M., Sharma Neeraj, Park Jiwon, Byon Hye Ryung, Fukuyama Sayuri, Han Zhenji, Fukumitsu Hitoshi, Schulz-Dobrick Martin, Yamanaka Keisuke, Yamagishi Hirona, Ohta Toshiaki, Yabuuchi Naoaki Hide authors
ACS CENTRAL SCIENCE 8 ( 6 ) 775 - 794 2022.5 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
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Metastable and Nanosized Li1.2Nb0.2V0.6O2 for High-Energy Li-ion Batteries
QI Ruijie, CAMPÉON Benoît D. L., KONUMA Itsuki, SATO Yoshihiko, KANEDA Yuko, KONDO Masashi, YABUUCH … Show more authors
QI Ruijie, CAMPÉON Benoît D. L., KONUMA Itsuki, SATO Yoshihiko, KANEDA Yuko, KONDO Masashi, YABUUCHI Naoaki Hide authors
Electrochemistry 90 ( 3 ) 037005 - 037005 2022.3 [Reviewed]
DOI Web of Science CiNii Research
Language：English Publishing type：Research paper (scientific journal) Publisher：公益社団法人 電気化学会 Joint Work
<p>A Li-excess cation-disordered rocksalt oxide, Li<sub>1.2</sub>Nb<sub>0.2</sub>V<sub>0.6</sub>O<sub>2</sub>, with higher theoretical capacity than traditional stoichiometric and layered oxides, is synthesized and tested as positive electrode materials for battery applications. Although Li<sub>1.2</sub>Nb<sub>0.2</sub>V<sub>0.6</sub>O<sub>2</sub> cannot be synthesized by conventional calcination method, a single phase and metastable oxide is successfully synthesized by high-energy mechanical milling. Electrode performance of metastable and nanosized Li<sub>1.2</sub>Nb<sub>0.2</sub>V<sub>0.6</sub>O<sub>2</sub> is significantly improved by heat treatment at 600 °C. Heat treated Li<sub>1.2</sub>Nb<sub>0.2</sub>V<sub>0.6</sub>O<sub>2</sub> with a partial cation ordered layered structure delivers a high reversible specific capacity of 320 mAh g<sup>−1</sup> on the basis of highly reversible two-electron redox of V ions. Moreover, inferior cyclability originating from the dissolution of V ions is successfully improved by using concentrate electrolyte solution, and over 90 % capacity retention is achieved after 50 cycles. This finding opens a new way to design high-capacity metastable Li-excess oxides for advanced Li-ion batteries with higher energy density.</p>
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Rational material design of Li-excess metal oxides with disordered rock salt structure
Naoaki Yabuuchi
Current Opinion in Electrochemistry 34 100978 2022.3 [Reviewed] [Invited]
Language：English Publishing type：Research paper (scientific journal) Publisher：Elsevier Single Work
Review Papers 【 display / non-display 】
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Tunining cation migration
Naoaki Yabuuchi
Nature Materials 19 372 - 373 2020.2 [Reviewed] [Invited]
Language：English Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Single Work
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リチウムイオン電池の発展の歴史と将来展望
藪内 直明
PF NEWS 37 9 - 14 2020.2 [Reviewed] [Invited]
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution) Single Work
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酸化物イオンの電荷補償を利用する蓄電池用マンガン系高容量正極材料
ケミカル・エンジニアリング 63 ( 9 ) 676 - 682 2018.9
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)
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酸化物イオンの電荷補償を利用するリチウムイオン電池用高容量正極材料
固体物理 53 ( 6 ) 51 - 58 2018.6
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)
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特集 層状物質 「ナトリウムイオン電池用クロム・チタン系層状酸化物」
日本セラミックス協会誌 セラミックス 53 ( 5 ) 348 - 390 2018
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)
Awards 【 display / non-display 】
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Featured in the List of 2020 ANNUAL MOST CITED PAPERS, Ranked 1st, Electrochemistry
2021.2 THE ELECTROCHEMICAL SOCIETY OF JAPAN Crystal Structures and Electrode Performance of Alpha-NaFeO2 for Rechargeable Sodium Batteries
Individual or group name of awards：Naoaki YABUUCHI, Hiroaki YOSHIDA, Shinichi KOMABA
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Featured in the List of CONTINUOUSLY HIGHLY CITED PAPERS, Ranked 5th, Electrochemistry
2021.2 THE ELECTROCHEMICAL SOCIETY OF JAPAN Crystal Structures and Electrode Performance of Alpha-NaFeO2 for Rechargeable Sodium Batteries
Individual or group name of awards：Naoaki YABUUCHI, Hiroaki YOSHIDA, Shinichi KOMABA
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Global Star Award
2019.1 The American Ceramics Society, Engineering Ceramic Division
Individual or group name of awards：Naoaki YABUUCHI
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The Periodic Table of Younger Chemists (Niobium)
2018.12 International Union of Pure and Applied Chemistry (IUPAC)
Individual or group name of awards：Naoaki YABUUCHI
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Clarivate Analytics, Highly Cited Researchers
2018.11 Clarivate Analytics
Individual or group name of awards：Naoaki YABUUCHI
Grant-in-Aid for Scientific Research 【 display / non-display 】
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格子の膨張収縮を生じない高濃度電荷蓄積を実現する高耐久性電極材料の創製
Grant number：21K18815 2021.7 - 2023.3
Grant-in-Aid for Challenging Research (Exploratory)
Authorship：Principal investigator Grant type：Competitive
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アニオンレドックスの可逆性を支配する原理解明と革新的蓄電池材料設計への応用
Grant number：21H04698 2021.4 - 2027.3
科学研究費補助金 Grant-in-Aid for Scientific Research(A)
Investigator(s)：藪内直明
Grant type：Competitive
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蓄電固体デバイスの創成に向けた界面イオンダイナミクスの科学
Grant number：19H05812 2019.6 - 2024.3
科学研究費補助金 Grant-in-Aid for Scientific Research on Innovative Areas
Investigator(s)：入山恭寿
Grant type：Competitive
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蓄電固体界面の機能開拓と界面新材料開発
Grant number：19H05816 2019.6 - 2024.3
科学研究費補助金 Grant-in-Aid for Scientific Research on Innovative Areas
Investigator(s)：藪内直明
Grant type：Competitive
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ナノ構造制御による相変化抑制を実現する革新的インサーション材料の創製 研究課題
Grant number：19K22229 2019.6 - 2021.3
科学研究費補助金 Grant-in-Aid for challenging Exploratory Research
Investigator(s)：藪内直明
Grant type：Competitive
Other external funds procured 【 display / non-display 】
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水を基軸とする未踏蓄電機能材料の開拓
Grant number：JPMJCR21O6 2021.10 - 2026.3
Japan Science and Technology Agency CREST
Authorship：Coinvestigator(s)
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表面改質を施したリチウム過剰系高容量正極材料の実証試験
2019.10 - 2020.9
Japan Science and Technology Agency A-STEP機能検証フェーズ
Investigator(s)：藪内直明
Presentations 【 display / non-display 】
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Nanostructured Li-excess High-capacity Electrode Materials for Li Storage Applications
Naoaki Yabuuchi [Invited]
46th International conference and exposition on advanced ceramics and composites (ICACC2022)
Event date： 2022.1
Language：English Presentation type：Oral presentation (invited, special)
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Metastable and Nanosized Materials for High-Capacity Positive Electrode Materials
Naoaki Yabuuchi [Invited]
6th International Conference on Advanced Eelectromaterials (ICAE 2021)
Event date： 2021.11
Language：English Presentation type：Oral presentation (invited, special)
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Nanostructured Electrode Materials for High Energy Li Batteries
Naoaki Yabuuchi [Invited]
International Workshop on Materials Science at Osaka Prefecture Univeristy
Event date： 2021.10
Language：English Presentation type：Oral presentation (invited, special)
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Materials design of Li-excess rocksalt oxides for Li storage applications
Naoaki Yabuuchi [Invited]
IBA 2021 Annual Meeting
Event date： 2021.10
Language：English Presentation type：Oral presentation (invited, special)
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Nanostructured High-Capacity Positive Electrode Materials for Li-Ion Batteries
Naoaki Yabuuchi [Invited]
240th ECS Meeting
Event date： 2021.10
Language：English Presentation type：Oral presentation (invited, special)
Past of Collaboration and Commissioned Research 【 display / non-display 】
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Panasonic
Funded Research offered by Enterprises
Project Year： 2021.9 - 2022.3
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LG Japan
Funded Research offered by Enterprises
Project Year： 2021.8 - 2022.7
Charge of on-campus class subject 【 display / non-display 】
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2022 Inorganic Chemistry 1
College of Engineering Science
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2022 Energy Storage Engineering
College of Engineering Science
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2022 Introduction to Solid State Physics
College of Engineering Science
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2022 Solid State Chemistry
Graduate school of Engineering Science
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2022 Chemistry, Chemical Engineering and Life Science: Exercise A
College of Engineering Science
Committee Memberships 【 display / non-display 】
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総務省消防庁「リチウムイオン蓄電池に係る火災予防上の安全対策に関する検討会」
2022.3 委員
Committee type：Government
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電気化学会普及委員会
2022.3 - 2024.2 委員長
Committee type：Academic society
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JST 戦略的創造研究推進事業 個人型研究 (さきがけ) 研究領域
2022.2 領域アドバイザー
Committee type：Government
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Symposium Organizer of ICACC 2022
2022.1 Symposium Organizer of Session 6
Committee type：Academic society
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Materials Research Meeting (MRM) 2021
2021.12 Lead organizer for Sympsium E-1
Committee type：Academic society
Social Contribution(Extension lecture) 【 display / non-display 】
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有機分子・バイオエレクトロニクス分科会講習会「SDGsに向けたクリーンエネルギー有機デバイスの最前線」
Role(s)： Lecturer
応用物理学会 2022.3
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高安全、長寿命、高エネルギー密度の水系リチウムイオン電池の開発に成功
Role(s)： Official expert
国立大学法人 横浜国立大学 横浜国立大学プレスリリース 2021.11
Audience： University students, Graduate students, Teachers, Researchers, Scientific organization, Company, Media, Other
Type：Newspaper, magazine
▪横浜国立大学の藪内教授らの研究グループは、高い安全性と従来リチウムイオン電池と同等以上の長寿命を実現した。
▪プレスリリース（2021年11月23日掲載）の他、次の新聞等にも掲載された。
(1)2021年11月23日 朝日新聞 記事
(2)2021年11月25日 電波新聞
(3)2021年11月26日 化学工業日報
(4)2021年12月10日 科学新聞
(5)2021年12月10日 日経産業新聞 -
2021年度第2回電池製造技術分科会
Role(s)： Lecturer
一般社団法人日本粉体工業技術会 2021.11
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Niobium Technology for Clean Energy
Role(s)： Lecturer
The Embassy of Brazil in Tokyo, CBMM and Sojitz Corporation 2021.11
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令和３年度第３回 iMATERIA 研究会「中性子回折で解明するセラミックスの機能」
Role(s)： Lecturer
茨城県中性子利用研究会 2021.10
Media Coverage 【 display / non-display 】
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「リチウム過剰」正極材を改良
日経産業新聞 2022.6
Author：Other
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汎用材料で電池３割安く
日経新聞 2022.6
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「リチウム過剰」の電池正極材、高電圧でも安定動作
日経産業新聞 2022.5
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安全・長寿命で高エネ密度
科学新聞 2021.12
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安全性高いリチウムイオン電池
日経産業新聞 2021.12