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Analysis of transport phenomena in lithium electrolyte solution focusing on counter anion

Research Project

Project/Area Number 19K15688
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 36020:Energy-related chemistry
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Uchida Satoshi  国立研究開発法人産業技術総合研究所, エネルギー・環境領域, 研究員 (40725420)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords輸送現象 / 電解液 / イオン輸送 / 電解液中のイオン輸送特性の解析 / 電解液の物性評価 / 電解液の構造解析 / Anion / Lithium
Outline of Research at the Start

リチウムイオン電池はスマートフォンなどの小型機器用から電気自動車用の大型電源に至るまで広く利用されているが、未だに科学的理解の追い付いていない部分が多く存在する。特に電解液設計は経験的に行われている。本研究では様々な電解液の基礎物性を測定・解析することで、電荷担体であるリチウムイオンではなく、対イオン(アニオン)が電解液の物性に与える影響を明らかにする。科学的理解の伴った電解液の設計指針を立てることで、リチウムイオン電池の性能を大幅に向上させることを目的とする。

Outline of Final Research Achievements

The electrolyte solutions for lithium-ion batteries including LiPF6 or LiFSA salt with various solvent compositions were prepared and its density, conductivity, viscosity, and diffusion coeffcient of the constituents were measured. In addition, the coodination structure of lithium ions in each electrolyte solution was analyzed using Raman spectroscopy. Ion transport phenomena in the electrolytes were analyzed using the above data and classical theories such as the Stokes-Einstein equation.

Academic Significance and Societal Importance of the Research Achievements

非水系電解液中のリチウムイオンまたは対アニオンの輸送現象は、単溶媒系の電解液をモデル系として用いて解析されてきた。一方で、リチウムイオン電池で実用的に用いられる電解液は二種以上の溶媒を用いた混合溶媒系であり、その複雑さから解析研究が手薄であった。本研究はで実用電解液中での輸送現象を解析し、学術的な視点から産業的に重要な知見を得たという点で、大きな社会的意義を持つ。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (6 results)

All 2022 2020 2019

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

  • [Journal Article] How does the solvent composition influence the transport properties of electrolyte solutions? LiPF6 and LiFSA in EC and DMC binary solvent2020

    • Author(s)
      Satoshi UCHIDA, Tetsu KIYOBAYASHI
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: online Issue: 18 Pages: 10875-10887

    • DOI

      10.1039/d1cp00967b

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] EC+DEC溶媒とEC+DMC溶媒の輸送特性はなぜ・どのように異なるのか?2022

    • Author(s)
      内田悟史、清林哲
    • Organizer
      電気化学会第89回大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 電解液中のイオン輸送挙動の解析および束縛空間内における電解液状態の推測2022

    • Author(s)
      内田悟史
    • Organizer
      電気化学会第89回大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] How does the solvent composition influence the transport properties of electrolyte solutions?2020

    • Author(s)
      Satoshi UCHIDA, Tetsu KIYOBAYASHI
    • Organizer
      PRiME2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] How does the solvent composition influence the transport properties of electrolyte solutions?2020

    • Author(s)
      Satoshi Uchida, Tetsu Kiyobayashi
    • Organizer
      Pacific Rim Meeting on Electrochemical and Solid-State Science 2020
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 混合溶媒ベースの電解液中におけるイオンの配位状態と拡散挙動2019

    • Author(s)
      内田悟史、清林哲、竹市信彦
    • Organizer
      第60回電池討論会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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