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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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2023.4
Concurrently Yokohama National UniversityInstitute for Multidisciplinary Sciences Professor
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2020.10
Concurrently Yokohama National UniversityInstitute of Advanced Sciences Professor
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2018.4
Concurrently Yokohama National UniversityGraduate School of Engineering Department of Materials Science and Engineering Professor
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2018.4
Concurrently Yokohama National UniversityCollege of Engineering Science Department of Chemistry, Chemical Engineering and Life Science 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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Interface ionics : for all-solid-state batteries and solid state ionics devices
Iriyama Yasutoshi, Amezawa Koji, Tateyama Yoshitaka, Yabuuchi Naoaki（ Role： Sole author）
Springer （ ISBN:9789819760381 ）
Language：English Book type：Scholarly book
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車載用リチウムイオン電池の開発と市場 2024
藪内直明（ Role： Joint author , 次世代リチウムイオン電池用正極材料開発）
シーエムシー出版 （ ISBN:978-4-7813-1755-7 ） [Reviewed]
Responsible for pages：10 Language：Japanese Book type：Scholarly book
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ポストリチウムイオン二次電池開発 部材開発から解析・性能診断技術まで
藪内 直明（ Role： Contributor , 「多電子反応を利用する高容量Li過剰型カチオン不規則配列岩塩型正極材料」）
エヌ・ティー・エス （ ISBN:978-4-86043-836-4 ）
Total pages：492 Responsible for pages：75-82 Language：Japanese Book type：Scholarly book
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次世代二次電池の開発動向
藪内 直明（ Role： Contributor , 第II編第1章「リチウム過剰型正極材料の研究開発」）
シーエムシー出版 （ ISBN:978-4-7813-1730-4 ）
Total pages：247 Responsible for pages：47-55 Language：Japanese Book type：Scholarly book
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科学
藪内直明（ Role： Joint author , 結晶構造とイオン拡散－電極材料および固体電解質材料）
岩波書店
Responsible for pages：6 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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Mechanistic study on moisture exposure of Ti-based layered oxides for sodium storage applications
Campéon, BDL; Ishikawa, T; Tomohiro, K; Yabuuchi, N
JOURNAL OF MATERIALS CHEMISTRY A 13 ( 3 ) 2187 - 2197 2025.1
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
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Efficient Pathways to Improve Electrode Performance of P’2 Na2/3MnO2 for Sodium Batteries
Ugata Yosuke, Kuriyama Tomohiro, Yabuuchi Naoaki
Chemical Communications Early Access 2025
Language：English Publishing type：Research paper (scientific journal) Publisher：The Royal Society of Chemistry Joint Work
A Mn-based sodium-containing layered oxide, P'2-type Na2/3MnO2, is revisited as a positive electrode material for sodium-ion batteries, and factors affecting its electrochemical performances are examined. The cyclability of Na2/3MnO2 is remarkably improved by increasing the lower cut-off voltage during cycling even though the reversible capacity is sacrificed. Furthermore, the use of highly concentrated electrolytes, in which the presence of free solvent molecules is eliminated, effectively suppresses the dissolution of Mn ions, thus enabling stable cycling with >85% capacity retention for continuous 300 cycles.
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MXene Electrodes for All Strain-Free Solid-State Batteries
Kawai, K; Lee, H; Nomura, Y; Fujita, M; Kitaura, H; Hosono, E; Nakajima, H; Tsukasaki, H; Mori, S; … Show more authors
Kawai, K; Lee, H; Nomura, Y; Fujita, M; Kitaura, H; Hosono, E; Nakajima, H; Tsukasaki, H; Mori, S; Sakuda, A; Hayashi, A; Yabuuchi, N; Lee, YM; Okubo, M Hide authors
ACS APPLIED MATERIALS & INTERFACES 16 ( 42 ) 57377 - 57385 2024.10
Language：Japanese Publishing type：Research paper (scientific journal) Joint Work
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A Practical and Sustainable Ni/Co-Free High-Energy Electrode Material: Nanostructured LiMnO2
Miyaoka Yuka, Sato Takahito, Oguro Yuna, Kondo Sayaka, Nakano Koki, Nakayama Masanobu, Ugata Yosuke … Show more authors
Miyaoka Yuka, Sato Takahito, Oguro Yuna, Kondo Sayaka, Nakano Koki, Nakayama Masanobu, Ugata Yosuke, Goonetilleke Damian, Sharma Neeraj, Glushenkov M. Alexey, Hiroi Satoshi, Ohara Koji, Takada Koji, Fujii Yasuhiro, Yabuuchi Naoaki Hide authors
ACS Central Science 10 ( 9 ) 1718 - 1732 2024.9
Language：English Publishing type：Research paper (scientific journal) Publisher：American Chemical Society (ACS) Joint Work
Ni/Co-free high-energy positive electrode materials are of great importance to ensure the sustainability of Li-ion battery production and its supply chain in addition to minimizing environmental impact. Here, nanostructured LiMnO2 with both orthorhombic/monoclinic layered domains is synthesized, and its lithium storage properties and mechanism are examined. High-energy mechanical milling is used to convert the metastable and nanosized LiMnO2 adopting the cation-disordered rocksalt structure to an optimal domain-segregated layered LiMnO2. This positive electrode produces an energy density of 820 W h kg–1, achieved by harnessing a large reversible capacity with relatively small voltage hysteresis on electrochemical cycles. Moreover, voltage decay for cycling, as observed for Li-excess Mn-based electrode materials, is effectively mitigated. Furthermore, by determining the structure–property relationships of different LiMnO2 polymorphs, LiMnO2 with similar domain structure and surface area is successfully synthesized with an alternative and simpler method, without the metastable precursor and high-energy mechanical milling. The cyclability of domain-containing LiMnO2 is also improved with the use of a highly concentrated electrolyte coupled with a lithium phosphate coating due to the suppression of Mn dissolution. These findings maximize the possibility of the development of high-energy, low-cost, and practical rechargeable batteries made from sustainable and abundant Mn sources without Ni/Co.
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Yin Jiaxuan, Zhang Yanjia, Kuriyama Tomohiro, Jin Yongcheng, Yabuuchi Naoaki
Chemistry of Materials 36 ( 18 ) 8682 - 8691 2024.9
Language：English Publishing type：Research paper (scientific journal) Publisher：American Chemical Society Joint Work
Lithium-ion batteries are now successfully developed with higher energy densities than classical aqueous-based battery technologies and are used as power sources for electric vehicles and other electric storage applications. Sodium-ion batteries are another emerging battery technology, but their energy density is not high compared to that of their Li counterparts. Anionic redox reactions have attracted attention due to their potential to enhance the reversible capacity and operating voltage of positive electrode materials in Na/Li batteries. To understand the influence of Al substitution on the activation mechanism of anionic redox reactions in Na-/Li-containing Mn-based layered oxides, the P2-type Al-substituted Na2/3Al0.1Mn0.9O2 is designed to explore the difference in the anionic redox behavior. LiyAl0.1Mn0.9O2 is also prepared by electrochemical ion exchange, and the anionic redox behavior was compared for both samples. The Al-substituted Na2/3Al0.1Mn0.9O2 provides better cycling performance with partial activation of anionic redox, which is not observed for P′2-type Na2/3MnO2. Good reversibility for Na2/3Al0.1Mn0.9O2 and LiyAl0.1Mn0.9O2 with anionic redox is achieved, and this improvement originates from the nonexcessive use of anionic redox in electrode materials. This finding opens the possibility to develop high-energy sodium/lithium insertion materials with reversible anionic redox.
Review Papers 【 display / non-display 】
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リチウムイオン電池の基本原理と火災リスク要因
藪内直明
火災 2023.10 [Reviewed] [Invited]
Language：English Publishing type：Rapid communication, short report, research note, etc. (scientific journal) Single Work
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次世代リチウムイオン電池の安全性とエネルギー密度向上
宇賀田洋介、藪内直明
火災 2023.10 [Reviewed] [Invited]
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Single Work
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結晶構造とイオン拡散－電極材料および固体電解質材料
藪内直明
科学 2023.2 [Reviewed] [Invited]
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution) Single Work
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蓄電池研究が拓く脱化石燃料に向けた未来像
藪内直明
現代化学 2023.1 [Reviewed] [Invited]
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media) Single Work
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軟X線・硬X線吸収分光法を用いた正極材の電化補償機構の解明
藪内直明
セラミックス 2023.1 [Reviewed] [Invited]
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Single Work
Awards 【 display / non-display 】
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2025年電気化学会学術賞
2024.12 電気化学会
Individual or group name of awards：藪内直明
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Selected as a fellow of the Royal Society of Chemistry (from the Royal Society of Chemistry)
2023.6 the Royal Society of Chemistry
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令和5年度 科学技術分野の文部科学大臣表彰 科学技術賞 (研究部門)
2023.4 文部科学省 先駆的インサーション材料開発と蓄電池への応用に関する研究
Individual or group name of awards：藪内直明
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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
Grant-in-Aid for Scientific Research 【 display / non-display 】
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チオン・アニオン配列低秩序化の特異性を利用した蓄電池材料の革新
Grant number：23K17954 2023.6 - 2025.3
Grant-in-Aid for Challenging Research (Exploratory)
Authorship：Principal investigator Grant type：Competitive
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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
Other external funds procured 【 display / non-display 】
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ASPIRE 先端国際共同研究推進事業
2024.2 - 2029.3
Japan Science and Technology Agency
Authorship：Coinvestigator(s)
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GteX（革新的GX技術創出事業）
2023.10 - 2028.3
Japan Science and Technology Agency
Authorship：Coinvestigator(s)
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次世代全固体蓄電池材料の評価・基盤技術開発／次世代全固体ＬＩＢ基盤技術開発
2023.4 - 2028.3
Ministry of Economy, Trade and Industry
Authorship：Coinvestigator(s)
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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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再生可能エネルギー最大導入に向けた電気化学材料研究拠点
2021.4 - 2026.3
Ministry of Education, Culture, Sports, Science and Technology
Authorship：Coinvestigator(s)
Presentations 【 display / non-display 】
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Toward high-energy lithium/sodium metal batteries with highly concentrated electrolytes
Y. Ugata and N. Yabuuchi [Invited]
49th International Conference and Exposition on Advanced Ceramics and Composites
Event date： 2025.1
Language：English Presentation type：Oral presentation (invited, special)
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Nanostructured high-capacity positive electrode materials for practical Li-ion battery applications
Naoaki Yabuuchi
The 1st Japan-Korea-China Battery Science Workshop
Event date： 2025.1
Language：English Presentation type：Oral presentation (invited, special)
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Defect Engineered High-energy Insertion Materials for Advanced Li-ion Batteries
Naoaki Yabuuchi [Invited]
POSTECH Signature Conference 2024
Event date： 2024.11
Language：English Presentation type：Oral presentation (keynote)
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Nanostructured Positive Electrode Materials for Li-Ion Battery Applications
Naoaki Yabuuchi [Invited]
PRiME 2024
Event date： 2024.10
Language：English Presentation type：Oral presentation (invited, special)
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Nanostructured Lithium Insertion Materials for Practical Battery Applications
Naoaki Yabuuchi [Invited]
International Battery Materials Association (IBA) 2024
Event date： 2024.9
Language：English Presentation type：Oral presentation (keynote)
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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2025 Introduction to Solid State Physics
College of Engineering Science
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2025 Chemistry, Chemical Engineering and Life Science: Exercise A
College of Engineering Science
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2025 Chemistry, Chemical Engineering and Life Science: Exercise B
College of Engineering Science
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2025 Inorganic Chemistry 1
College of Engineering Science
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2025 Energy Storage Engineering
College of Engineering Science
Committee Memberships 【 display / non-display 】
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JST 日 ASEAN 科学技術・イノベーション協働連携事業審査委員
2024.4 - 2025.3 アドバイザー
Committee type：Academic society
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ICACC 2025
2024.4 - 2025.1 Symposium Organizer, S6: Advanced Materials and Technologies for Rechargeable Energy Storage
Committee type：Academic society
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14th International Conference on Ceramic Materials and Components for Energy and Environmental Systems (CMCEE14)
2024.1 - 2024.8 Symposium Organizer, T1.6 Advanced Batteries and Supercapacitors for Energy Storage Applications
Committee type：Academic society
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PRiME 2024 Meeting
2023.11 - 2024.10 Organizing Committee
Committee type：Academic society
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総務省消防庁 「リチウムイオン蓄電池に係る危険物規制に関する検討会」
2023.4 - 2024.3 委員
Committee type：Other
Social Contribution(Extension lecture) 【 display / non-display 】
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電気化学会 セミナーD “最先端電池技術 2024
Role(s)： Lecturer, Logistic support
2024.2
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第63回 電気化学セミナー “蓄電池の未来 ー学術・技術・人材育成の展望ー
Role(s)： Lecturer
2023.10
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構造物性研究会・コヒーレント構造科学研究会 合同研究会
Role(s)： Lecturer
2023.9
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Interface Ionics for All-Solid-State Batteries
Role(s)： Lecturer
Interface Ionics for All-Solid-State Batteries 2023.6
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2022年度立命館大学SRセンター –研究成果報告会–
Role(s)： Lecturer
2023.6
Media Coverage 【 display / non-display 】
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Cobalt-free electrodes achieved with nickel ions
2024.3
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高エネ密度でコバルトフリーのニッケル系電池材料＝横浜国大など
MIT Technology Review Japan 2024.2
Author：Other
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高エネ密度・長寿命のコバルトニッケルフリー電池材料
MIT Technology Review Japan 2023.7
Author：Other
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全固体電池、トヨタと共同研究の横浜国立大学教授に聞く
日経新聞社 2023.7
Author：Other