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Development of electrode materials which form in-situ formed electrolyte for solid-state batteries

Research Project

Project/Area Number 21K05243
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 36020:Energy-related chemistry
Research InstitutionKyushu University

Principal Investigator

Inoishi Atsushi  九州大学, 先導物質化学研究所, 准教授 (10713448)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords固体電解質その場形成負極 / Ca(BH4)2 / TiH2 / MgH2 / MgCl2 / LiBH4 / LiH / コンバージョン反応 / その場形成固体電解質 / 全固体電池 / 水素化物 / 塩化マグネシウム / ハロゲン化マグネシウム / 自己生成型固体電解質 / 全固体リチウム電池
Outline of Research at the Start

申請者は、全固体電池中で水素化物材料にリチウムイオンを挿入すると、放電生成物が「自己生成型固体電解質」として機能し、予め電極合材中に固体電解質を含有しなくても充放電反応が進行することを見出した。しかし、なぜこのような反応が進行するのかは明確になっておらず、本研究では水素化物以外の材料系について、「自己生成型固体電解質」により充放電が進行する活物質を探索しそれらを比較することで、生成物のリチウムイオン導電性、金属の電子導電性、粒子径、ヤング率、界面の緻密性が電池特性に及ぼす影響を明確にする。

Outline of Final Research Achievements

At the beginning of the research, it was discovered that all-solid-state lithium-ion batteries using magnesium compounds such as MgH2, Mg(BH4)2 could be charged and discharged without containing a solid electrolyte in the electrode mixture. In this research,TiH2 with high electronic conductivity and Ca(BH4)2 with high ionic conductivity were newly developed as negative electrodes which form in-situ formed electrolyte.

Academic Significance and Societal Importance of the Research Achievements

固体電解質その場形成は全固体電池の実質的な負極用量を大幅に向上する技術であり、蓄電池のエネルギー密度向上に寄与する。また、固体電解質その場形成の反応は電極反応を進行させる際のイオン導電パスを自身の放電生成物に依存するものであり、コンバージョン反応の進行しやすさを理解する上で好適な題材である。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (12 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (2 results) Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (5 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Remarks (1 results)

  • [Int'l Joint Research] University of Glasgow(英国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] 國立陽明交通大學(台湾)

    • Related Report
      2022 Research-status Report
  • [Journal Article] <i>In situ</i> Electrolyte Design: Understanding the Prospects and Limitations of a High Capacity Ca(BH<sub>4</sub>)<sub>2</sub> Anode for All Solid State Batteries2024

    • Author(s)
      Chen Yixin、Sakamoto Ryo、Inoishi Atsushi、Okada Shigeto、Sakaebe Hikari、Albrecht Ken、Gregory Duncan H.
    • Journal Title

      Batteries & Supercaps

      Volume: 7 Issue: 4

    • DOI

      10.1002/batt.202300550

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] TiH2-based anode: In situ formation of solid electrolyte for high volumetric energy density with minimal content of conducting agent2024

    • Author(s)
      Chen Yixin、Inoishi Atsushi、Okada Shigeto、Sakaebe Hikari、Albrecht Ken
    • Journal Title

      Journal of Energy Storage

      Volume: 86 Pages: 111286-111286

    • DOI

      10.1016/j.est.2024.111286

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Electrode thickness dependence of charge?discharge performance and reaction distribution of an in-situ-formed solid electrolyte for MgH2 anodes2024

    • Author(s)
      Chen Yixin、Inoishi Atsushi、Yoshii Kazuki、Sato Hiroki、Okada Shigeto、Sakaebe Hikari、Albrecht Ken
    • Journal Title

      Electrochimica Acta

      Volume: 485 Pages: 144083-144083

    • DOI

      10.1016/j.electacta.2024.144083

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] High capacity all-solid-state lithium battery enabled by in situ formation of an ionic conduction path by lithiation of MgH22022

    • Author(s)
      Inoishi Atsushi、Sato Hiroki、Chen Yixin、Saito Hikaru、Sakamoto Ryo、Sakaebe Hikari、Okada Shigeto
    • Journal Title

      RSC Advances

      Volume: 12 Issue: 17 Pages: 10749-10754

    • DOI

      10.1039/d2ra01199a

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] TiH2を利用した高体積エネルギー密度水素化物負極の構築2023

    • Author(s)
      陳 伊新、猪石 篤、岡田 重人、アルブレヒト 建、栄部 比夏里
    • Organizer
      第64回電池討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] XAFSを利用した革新電池の研究開発2022

    • Author(s)
      猪石篤
    • Organizer
      第25回 XAFS討論会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 固体電解質を自己生成するハロゲン化マグネシウム負極を用いた全固体リチウム電池の大容量化2022

    • Author(s)
      猪石篤、陶山美幸、陳伊新、坂本遼、アルブレヒト建、岡田重人、栄部比夏里
    • Organizer
      第63回電池討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] Large-capacity All-solid-state Lithium Batteries by in-situ Formation of Hydride-type Li+ ion Conductor2022

    • Author(s)
      Atsushi Inoishi, Yixin Chen, Ryo Sakamoto, Ken Albrecht, Shigeto Okada, Hikari Sakaebe
    • Organizer
      17th Asian Conference on Solid State Ionics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 水素化物負極のリシエーション過程における固体電解質自己生成機構2021

    • Author(s)
      猪石篤 、陳伊新、佐藤寛基、坂本遼 、泉博章、南浩成、栄部比夏里、岡田重人
    • Organizer
      第62回電池討論会
    • Related Report
      2021 Research-status Report
  • [Remarks] Professor Jeng-Kuei Chang 研究室HP

    • URL

      https://sites.google.com/view/jkclab/home?authuser=0

    • Related Report
      2022 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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