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Creation of new high-performance fluoride ion conductors using double salts

Research Project

Project/Area Number 21K14422
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 26040:Structural materials and functional materials-related
Research InstitutionThe University of Tokyo

Principal Investigator

Kawahara Kazuaki  東京大学, 大学院工学系研究科(工学部), 助教 (90869570)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsフッ化物イオン電池 / フッ化物イオン伝導体 / 複塩 / フッ化物複塩 / フルオロアンチモン酸カリウム / 電子顕微鏡 / 全変動正則化
Outline of Research at the Start

フッ化物イオン電池は現行のリチウムイオン電池を凌駕するエネルギー密度を持つと期待されている。しかし、材料のフッ化物イオン伝導度が小さいことに由来する複数の課題があり、室温で1mS/cm以上のフッ化物イオン伝導度を示す材料の開発が望まれている。研究代表者は複数のフッ化物の化合物であるフッ化物複塩、KSbF4を新規に合成し、室温で0.1mS/cmのフッ化物イオン伝導度を示すことを見出ている。本研究では、複塩の構成元素や組成を最適化することで、室温で1mS/cm以上のフッ化物イオン伝導度を示す材料を開発する。またイオン伝導メカニズムの解析により、高速イオン伝導体創出の指針を構築する。

Outline of Final Research Achievements

In this study, we developed solid materials exhibiting high fluoride ion conductivity using double salts for room-temperature operation of fluoride ion batteries. Room temperature ionic conductivity of 10^-4 S/cm was achieved by using fluoride double salts containing Sb. In particular, it was discovered that the ionic conductivity can be improved by more than one order of magnitude compared to conventional materials by doping alkali metal or halogens. Additionally, to clarify the fluoride ion conduction mechanism of solid electrolytes, we developed a noise reduction method for atomic resolution electron microscope images of fluorides.

Academic Significance and Societal Importance of the Research Achievements

本研究を通して、Sbを含むフッ化物複塩を用いることで、室温で10^-4 S/cm以上の高いフッ化物イオン伝導度を実現できることが分かった。特に、アルカリ金属やハロゲンの添加により、イオン伝導度を向上可能であることが分かった。本成果はこれまで検討されてこなかったフッ化物複塩がフッ化物イオン電池の室温動作、社会実装を実現する有望な材料候補であることを示している。

Report

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

    (18 results)

All 2024 2023 2022 2021

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (13 results) (of which Int'l Joint Research: 4 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Fast reconstruction of scanning transmission electron microscopy images using Markov random field model2023

    • Author(s)
      Kusumi Taichi、Katakami Shun、Ishikawa Ryo、Kawahara Kazuki、Shibata Naoya、Okada Masato
    • Journal Title

      Ultramicroscopy

      Volume: 253 Pages: 113811-113811

    • DOI

      10.1016/j.ultramic.2023.113811

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] La-Al Intermetallic Alloy Anode for Realizing High-Energy Fluoride-Ion Battery2023

    • Author(s)
      Shun Sasano, Ryo Ishikawa, Kazuaki Kawahara, Naoya Shibata, Yuichi Ikuhara
    • Journal Title

      Journal of The Electrochemical Society

      Volume: 170 Issue: 12 Pages: 120523-120523

    • DOI

      10.1149/1945-7111/ad136e

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fluoride Ion Conductivity of Rb Doped KSbF42023

    • Author(s)
      Kawahara Kazuaki、Ishikawa Ryo、Shibata Naoya、Ikuhara Yuichi
    • Journal Title

      Journal of The Electrochemical Society

      Volume: 170 Pages: 020528-020528

    • DOI

      10.1149/1945-7111/acbca5

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Atomic-resolution STEM image denoising by total variation regularization2022

    • Author(s)
      Kawahara Kazuaki、Ishikawa Ryo、Sasano Shun、Shibata Naoya、Ikuhara Yuichi
    • Journal Title

      Microscopy

      Volume: 71 Issue: 5 Pages: 302-310

    • DOI

      10.1093/jmicro/dfac032

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] ハロゲン添加KSbF4のフッ化物イオン伝導2024

    • Author(s)
      川原一晃、石川亮、柴田直哉、幾原雄一
    • Organizer
      セラミックス協会2024年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] LaF3を基にしたフッ化物イオン伝導体の開発2023

    • Author(s)
      川原一晃、石川亮、佐々野駿、柴田直哉、幾原雄一
    • Organizer
      第64回電池討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Atomic-resolution STEM Image Denoising by Total Variation Regularization2023

    • Author(s)
      Kazuaki Kawahara, Ryo Ishikawa, Shun Sasano, Naoya Shibata, Yuichi Ikuhara
    • Organizer
      IAMNano2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Atomic-resolution STEM image denoising by total variation regularization2023

    • Author(s)
      Kazuaki Kawahara, Ryo Ishikawa, Shun Sasano, Naoya Shibata, Yuichi Ikuhara
    • Organizer
      The 20th International Microscopy Congress
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 全三階変動を用いた原子分解能STEM像のノイズ除去2023

    • Author(s)
      川原一晃、石川亮、佐々野駿、柴田直哉、幾原雄一
    • Organizer
      日本顕微鏡学会第79回学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] LaF3を基にしたフッ化物イオン伝導体の開発2023

    • Author(s)
      川原一晃、石川亮、柴田直哉、幾原雄一
    • Organizer
      日本セラミックス協会2023年年会
    • Related Report
      2022 Research-status Report
  • [Presentation] Fluoride ion conductivity of Cs-doped KSbF42022

    • Author(s)
      K. Kawahara, R. Ishikawa, N. Shibata, Y. Ikuhara
    • Organizer
      23rd International Conference on Solid State Ionics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Total variation正則化を用いた原子分解能STEM像のノイズ除去2022

    • Author(s)
      川原一晃、石川亮、佐々野駿、柴田直哉、幾原雄一
    • Organizer
      日本顕微鏡学会第78回学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Cs添加KSbF4のフッ化物イオン伝導2022

    • Author(s)
      川原一晃、石川亮、柴田直哉、幾原雄一
    • Organizer
      第63回電池討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] Cs添加KSbF4(K1-xCsxSbF4)のフッ化物イオン伝導2022

    • Author(s)
      川原一晃、石川亮、柴田直哉、幾原雄一
    • Organizer
      セラミックス協会2022年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Rb添加KSbF4のフッ化物イオン伝導2021

    • Author(s)
      川原一晃、石川亮、柴田直哉、幾原雄一
    • Organizer
      日本セラミックス協会第34回秋季シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] Rb添加KSbF4(K1-xRbxSbF4)のフッ化物イオン伝導2021

    • Author(s)
      川原一晃、石川亮、柴田直哉、幾原雄一
    • Organizer
      第62回電池討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] Fluoride ion conductivity of potassium tetrafluoroantimonate2021

    • Author(s)
      K. Kawahara, R. Ishikawa, K. Nakayama, N. Shibata, Y. Ikuhara
    • Organizer
      14th Pacific Rim Conference on Ceramic and Glass Technology
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Patent(Industrial Property Rights)] マルコフランダムフィールドモデルを用いた電子顕微鏡画像の画像修復装置2023

    • Inventor(s)
      岡田真人、片上舜、久住太一、柴田直哉、石川亮、川原一晃
    • Industrial Property Rights Holder
      岡田真人、片上舜、久住太一、柴田直哉、石川亮、川原一晃
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-075963
    • Filing Date
      2023
    • Related Report
      2023 Annual Research Report

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

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