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Theoretical Design of Superconcentrated Electrolyte Solutions for Secondary Batteries

Research Project

Project/Area Number 18K14183
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 32010:Fundamental physical chemistry-related
Research InstitutionUniversity of Hyogo (2019)
Waseda University (2018)

Principal Investigator

OKOSHI Masaki  兵庫県立大学, シミュレーション学研究科, 客員研究員(研究員) (00760860)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords二次電池 / 電解液 / 溶液構造 / 超濃厚電解液 / 分子シミュレーション / 理論化学 / 分子動力学 / 量子化学 / 電子状態理論
Outline of Final Research Achievements

Electrolyte solution is one of the main components of alkali-ion (Li / Na) batteries. The present study investigated the physicochemical properties of the superconcentrated solution, which is regarded as a novel class of liquid electrolyte possessing uncommon but favorable properties.
The present study revealed that the superconcentrated solution possess a characteristic network-like structure, in which carrier-ions are trapped. Dynamical ligand-exchange reactions maintain the diffusivity of carrier-ions, unlike the conventional vehicular-type diffusion in common dilute electrolyte solutions. The timing constants are evaluated to be a few-ten-pico-second order.
Detailed analyses showed that a small difference in chemical group of organic anions modulates the macroscopic network structure, and affects the diffusivity of carrier ions.

Academic Significance and Societal Importance of the Research Achievements

リチウムイオン電池に代表される二次電池は、現代社会に不可欠なエネルギー技術である。その需要は拡大し続けており、性能向上が望まれている。特に、電池を構成する主要部材である正極・負極・電解液の最適設計が望まれる。
電解質濃度を通常の3倍以上にまで高めた超濃厚電解液は、従来の電解液とは質的にも異なる新規電解液として期待されている。本研究では、その物理化学的性質を理論化学的手法に基づいて明らかにした。
本研究が見出した特異的なネットワーク様の溶液構造と、その変調によるキャリアイオン拡散機構、また電解質分子のミクロな化学的性質と溶液のマクロな性質の連関は、超濃厚電解液の最適設計に向けた指針となる。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (14 results)

All 2019 2018

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (10 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results) Book (1 results)

  • [Journal Article] 7.大規模量子分子動力学法によるNaイオン二次電池用超濃厚電解液の溶液構造とキャリアイオンダイナミクスの理論的解析2019

    • Author(s)
      大越昌樹、周建斌、中井浩巳
    • Journal Title

      Denki Kagaku

      Volume: 87 Issue: Autumn Pages: 233-238

    • DOI

      10.5796/denkikagaku.19-FE0024

    • NAID

      130007703271

    • ISSN
      2433-3255, 2433-3263
    • Year and Date
      2019-09-05
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Sodium‐ and Potassium‐Hydrate Melts Containing Asymmetric Imide Anions for High‐Voltage Aqueous Batteries2019

    • Author(s)
      Zheng Qifeng、Miura Shota、Miyazaki Kasumi、Ko Seongjae、Watanabe Eriko、Okoshi Masaki、Chou Chien‐Pin、Nishimura Yoshifumi、Nakai Hiromi、Kamiya Takeshi、Honda Tsunetoshi、Akikusa Jun、Yamada Yuki、Yamada Atsuo
    • Journal Title

      Angewandte Chemie International Edition

      Volume: 58 Issue: 40 Pages: 14202-14207

    • DOI

      10.1002/anie.201908830

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Reversible Sodium Metal Electrodes: Is Fluorine an Essential Interphasial Component?2019

    • Author(s)
      K. Doi, Y. Yamada, M. Okoshi, J. Ono, C.-P. Chou, H. Nakai, A. Yamada
    • Journal Title

      Angewandte Chemie International Edition

      Volume: 印刷中 Issue: 24 Pages: 8024-8028

    • DOI

      10.1002/anie.201901573

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] Reversible Sodium Metal Electrodes: Is Fluorine an Essential Interphasial Component?2019

    • Author(s)
      K. Doi, Y. Yamada, M. Okoshi, J. Ono, C.-P. Chou, H. Nakai, A. Yamada
    • Organizer
      10th International Conference on Materials for Advanced Technologies
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Anion Dependences in Solution Structure and Ion Conduction Mechanism in Superconcentrated Electrolyte Solution for Na-ion Battery2019

    • Author(s)
      M. Okoshi, H. Washizu, H. Nakai
    • Organizer
      9th Conference of the Asia-Pacific Association of Theoretical and Computational Chemists
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Reversible Sodium Metal Electrodes: Is Fluorine an Essential Interphasial Component?2019

    • Author(s)
      K. Doi, Y. Yamada, M. Okoshi, J. Ono, C.-P. Chou, H. Nakai, A. Yamada
    • Organizer
      Materials Research Meeting 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 理論化学シミュレーションによる触媒と電池の元素戦略研究2019

    • Author(s)
      大越昌樹
    • Organizer
      第7回元素戦略に基づいた触媒設計シンポジウム
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] ナトリウム金属の高効率析出溶解反応を可能にするフッ素フリー電解液2019

    • Author(s)
      土肥恭輔、山田裕貴、大越昌樹、小野純一、周建斌、中井浩巳、山田淳夫
    • Organizer
      電気化学会第86回大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Theoretical Analysis on Solution Structure and Ion Conduction Mechanism in Superconcentrated Electrolyte Solution for Na-ion Battery2018

    • Author(s)
      M. Okoshi, C.-P. Chou, H. Nakai
    • Organizer
      5th International Conference on Sodium Batteries (ICNaB-2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Naイオン二次電池用高濃度電解液におけるキャリアイオン拡散の理論的解析2018

    • Author(s)
      大越昌樹、周建斌、中井浩巳
    • Organizer
      第21回理論化学討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] 高濃度電解液における溶液構造とキャリアイオン拡散機構の理論的解析2018

    • Author(s)
      大越昌樹、周建斌、中井浩巳
    • Organizer
      第5回電子状態理論シンポジウム
    • Related Report
      2018 Research-status Report
  • [Presentation] Naイオン二次電池用高濃度電解液における溶液構造とキャリアイオン拡散機構の理論的解析2018

    • Author(s)
      大越昌樹、周建斌、中井浩巳
    • Organizer
      第59回電池討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] ナトリウム金属の高効率析出溶解反応を可能にするフッ素フリー電解液2018

    • Author(s)
      土肥恭輔、山田裕貴、大越昌樹、小野純一、周建斌、中井浩巳、山田淳夫
    • Organizer
      第59回電池討論会
    • Related Report
      2018 Research-status Report
  • [Book] リチウムイオン電池の 分析、解析と評価技術 事例集 -劣化、発熱、ガス、内部状態、反応メカニズム-2019

    • Author(s)
      大越昌樹
    • Total Pages
      522
    • Publisher
      技術情報協会
    • ISBN
      9784861047701
    • Related Report
      2019 Annual Research Report

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Published: 2018-04-23   Modified: 2021-02-19  

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