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2023 Fiscal Year Final Research Report

Development of New Solid State Ionics Materials through Design of Functional Interface

Planned Research

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Project AreaScience on Interfacial Ion Dynamics for Solid State Ionics Devices
Project/Area Number 19H05816
Research Category

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionYokohama National University

Principal Investigator

Yabuuchi Naoaki  横浜国立大学, 大学院工学研究院, 教授 (80529488)

Co-Investigator(Kenkyū-buntansha) 林 晃敏  大阪公立大学, 大学院工学研究科, 教授 (10364027)
大久保 將史  早稲田大学, 理工学術院, 教授 (20453673)
菅 大介  京都大学, 化学研究所, 准教授 (40378881)
喜多條 鮎子  山口大学, 大学院創成科学研究科, 准教授 (50446861)
Project Period (FY) 2019-06-28 – 2024-03-31
Keywords蓄電池
Outline of Final Research Achievements

To develop advanced batteries and electrode materials, detailed studies on science of electrode materials and interfaces with electrolytes have been conducted. New electrode materials with higher charge carrier density have been successfully found. A new solid electrolyte with superior ionic conductivity has been also developed. Moreover, a key material to realize practical all-solid-state batteries, which is a near dimensionally invariable high capacity electrode material, has been obtained, and the operation of all-solid-state batteries without external pressure is experimentally proved. These findings for battery materials and interfaces with electrolytes result in the development of high-performance batteries in the future.

Free Research Field

エネルギー化学

Academic Significance and Societal Importance of the Research Achievements

将来的な脱炭素社会実現には蓄電池の高性能化が必要不可欠であり、また、夢の電池として全固体電池を上げることができる。本研究課題では蓄電固体界面をキーワードに様々な電池材料開発を進め、多くの新しい材料開発に成功した。さらに、実用的な全固体電池実現の鍵となる電極材料の体積変化を生じないという材料の開発にも成功した。これまで、全固体電池の課題として寿命向上が課題であったが、体積不変の材料を用いることで、従来の液系リチウムイオン電池よりも長寿命な電池ができることが確認された。これらの発見は将来的な脱炭素社会の実現に大きく寄与する成果であるといえる。

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Published: 2025-01-30  

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