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Investigation of determining factor on electrochemical stabilities of lithium and sodium metal battery electrolytes

Research Project

Project/Area Number 21K05263
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 InstitutionNational Institute for Materials Science

Principal Investigator

Mandai Toshihiko  国立研究開発法人物質・材料研究機構, エネルギー・環境材料研究センター, 主任研究員 (20810592)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords蓄電池 / 電解液 / アルカリ金属 / 還元安定性 / アート錯体 / 立体構造 / リチウム / ナトリウム / アニオン / 安定性 / 還元 / 酸化 / アルカリ金属電池 / 電解質 / 分解 / 電析
Outline of Research at the Start

本研究では、構造設計の自由度が高いボレート系およびアルミネート系電解質を題材に、アニオンおよび置換基の化学構造から導き出される定量的な物理量と電気化学的安定性を関連付けることで、アニオンの安定性を支配する制御因子を究明する。さらに少電解質量かつ高利用率条件という、実電池動作に則した環境下における開発電解質の特性・界面挙動を重点的に評価し、電池動作におけるその設計コンセプトの妥当性を検証する。金属負極に対する還元耐性と一定水準の耐酸化性を両立する電解質アニオンの設計指針を確立し、電池の高エネルギー密度化に不可欠な金属負極の安定動作を可能とする電解質系を提案する。

Outline of Final Research Achievements

Rechargeable batteries those incorporating reductive metal as the negative electrode active material can achieve an energy density higher than that of current lithium-ion batteries. In this study, we focused on Li and Na metal, which possess strong reducing power among various electrode materials, and aimed to establish a rational design guideline for a stable electrolyte that increases the charge-discharge reaction efficiency. The chemical structure-electrochemical property relationship was systematically evaluated using an art complex-based electrolyte salt as a model system because of its structural design flexibility. It was found that controlling the dissociativity of the electrolyte salt by introducing appropriate branching structure and fluorine substitution is an important guideline in creating an electrolyte that exhibit favorable electrochemical performance against Li and Na metal negative electrodes.

Academic Significance and Societal Importance of the Research Achievements

本研究では、従来の電解液研究で取られてきた電解質分解を前提とした方法論とは根本的なコンセプトを異にし、金属負極に対して化学的に安定な電解液を開発するための設計指針を提案した。本指針に基づけば、広大な探索空間を低次元化することができ、有望材料の探索加速が期待できる。また本研究を通して得られた知見は、社会的にも切望されている高性能な次世代金属電池の実現に真に資する電解質材料を設計開発する上で、重要な指針を提示するものである。

Report

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

    (14 results)

All 2024 2023 2022

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (9 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Journal Article] Mg-Zn-Cl-integrated functional interface for enhancing the cycle life of Mg electrodes2024

    • Author(s)
      Mandai Toshihiko、Tanaka Umi、Watanabe Mariko
    • Journal Title

      Energy Storage Materials

      Volume: 67 Pages: 103302-103302

    • DOI

      10.1016/j.ensm.2024.103302

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Comparative Studies on [B(HFIP)<sub>4</sub>]-Based Electrolytes with Mono- and Divalent Cations2023

    • Author(s)
      Mandai Toshihiko、Naya Hiroko、Masu Hyuma
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 127 Issue: 17 Pages: 7987-7997

    • DOI

      10.1021/acs.jpcc.3c01160

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Oxygen - a fatal impurity for reversible magnesium deposition/dissolution2023

    • Author(s)
      Mandai Toshihiko、Watanabe Mariko
    • Journal Title

      Journal of Materials Chemistry A

      Volume: 11 Issue: 18 Pages: 9755-9761

    • DOI

      10.1039/d3ta01286g

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 2023 Roadmap on molecular modelling of electrochemical energy materials2023

    • Author(s)
      C Zhang et al
    • Journal Title

      Journal of Physics: Energy

      Volume: 5 Issue: 4 Pages: 041501-041501

    • DOI

      10.1088/2515-7655/acfe9b

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Toward Improved Anodic Stability of Ether-Based Electrolytes for Rechargeable Magnesium Batteries2023

    • Author(s)
      Mandai Toshihiko、Yao Masaru、Sodeyama Keitaro、Kagatsume Akiko、Tateyama Yoshitaka、Imai Hiroaki
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 127 Issue: 22 Pages: 10419-10433

    • DOI

      10.1021/acs.jpcc.3c01452

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Presentation] ナトリウムイオン電池の実用化に向けた電極の組成検討2024

    • Author(s)
      万代俊彦、木村伸
    • Organizer
      電気化学会第91回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Fatal Impurity for Electrochemical Mg Deposition/Dissolution2023

    • Author(s)
      Toshihiko Mandai
    • Organizer
      244th ECS Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Specific Combination of [B(HFIP)4]- with Mg2+ as A Metal Anode Battery Electrolyte2023

    • Author(s)
      Toshihiko Mandai
    • Organizer
      74th Annual ISE Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Mg 金属蓄電池の研究開発:現状と展望2023

    • Author(s)
      万代俊彦
    • Organizer
      第 59 回学際領域セミナー
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Mg金属電池用電解液の開発と今後の課題2023

    • Author(s)
      万代俊彦
    • Organizer
      日本化学会第103春季年会
    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Invited
  • [Presentation] Mg金属負極の溶解析出挙動へのZn成分添加効果2023

    • Author(s)
      万代俊彦
    • Organizer
      第64回電池討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Mg析出溶解特性に及ぼす大気成分の影響2023

    • Author(s)
      万代俊彦
    • Organizer
      電気化学会第90回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 化学処理したMg金属負極の界面挙動2023

    • Author(s)
      万代俊彦
    • Organizer
      2023電気化学秋季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] ホウ素系電解液からの各種金属負極の電析挙動2022

    • Author(s)
      万代俊彦
    • Organizer
      第63回電池討論会
    • Related Report
      2022 Research-status Report

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

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