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Investigation of oxygen release and its influence on electrochemical properties of cathode active materials for lithium ion battery

Research Project

Project/Area Number 18K05288
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 InstitutionTohoku University

Principal Investigator

Nakamura Takashi  東北大学, 多元物質科学研究所, 准教授 (20643232)

Co-Investigator(Kenkyū-buntansha) 木村 勇太  東北大学, 多元物質科学研究所, 助教 (60774081)
Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywordsリチウムイオン電池 / リチウム過剰系正極 / 酸素脱離 / Li過剰系正極 / 酸素欠損 / アニオン欠陥 / 正極材料 / Liイオン二次電池 / 正極
Outline of Final Research Achievements

In this work, we investigated the oxygen release behavior of Li-rich cathode materials for lithium ion batteries by combining thermogravimetry and coulometric titration techniques, and succeeded to reveal the mechanism of the oxygen release. Oxygen-deficient Li-rich cathodes was prepared by using the electrochemical cell for the coulometric titration, and influences of oxygen defects on electrochemical performance was studied. From these attempts, it was revealed that the introduction of oxygen vacancy improved capacity retention. Findings of this work greatly contribute to the development of advanced battery materials.

Academic Significance and Societal Importance of the Research Achievements

本研究では、固体イオニクス的手法を電池材料に適用することで、これまで明らかにされてこなかった酸化物系正極材料からの酸素脱離現象を定量的に評価し、そのメカニズムに迫ることに成功した。これは学術的に極めて重要な知見である。また酸化物イオン伝導体を使った電気化学セルを活用することで、任意量の酸素空孔を含有した酸素欠損正極を合成することに成功し、酸素欠損導入により容量維持率が大きく改善することを見出した。以上の成果はクリーンエネルギー技術の開発に資するものであり、将来的には持続可能な社会の発展に貢献することが期待できる。

Report

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

    (13 results)

All 2019 2018 Other

All Int'l Joint Research (1 results) Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results) Presentation (10 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Int'l Joint Research] Justus Liebig University Giessen(ドイツ)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Guidelines for All-Solid-State Battery Design and Electrode Buffer Layers Based on Chemical Potential Profile Calculation2019

    • Author(s)
      Nakamura Takashi、Amezawa Koji、Kulisch Joern、Zeier Wolfgang G.、Janek Juergen
    • Journal Title

      ACS Applied Materials & Interfaces

      Volume: 11 Issue: 22 Pages: 19968-19976

    • DOI

      10.1021/acsami.9b03053

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Defect chemical studies on oxygen release from the Li-rich cathode material Li1.2Mn0.6Ni0.2O2-d2019

    • Author(s)
      Nakamura Takashi、Gao Hongze、Ohta Kento、Kimura Yuta、Tamenori Yusuke、Nitta Kiyofumi、Ina Toshiaki、Oishi Masatsugu、Amezawa Koji
    • Journal Title

      Journal of Materials Chemistry A

      Volume: 7 Issue: 9 Pages: 5009-5019

    • DOI

      10.1039/c8ta12484a

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] Oxygen release from Li-rich cathode material for lithium ion batteries2019

    • Author(s)
      Takashi Nakamura
    • Organizer
      International Conference on Energy, Resources, Environment and Sustainable Development
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Defect chemical studies on oxygen release of Li-rich cathode material Li1.2Mn0.6Ni0.2O22019

    • Author(s)
      Takashi Nakamura, Hongze Gao, Kento Ohta, Yuta Kimura, Yusuke Tamenori, Kiyofumi Nitta, Toshiaki Ina, Masatsugu Oishi, Koji Amezawa
    • Organizer
      22nd International Conference on Solid State Ionics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influence of oxygen deficiency on electrochemical properties of Li-rich positive electrode material Li1.2Mn0.6Ni0.2O22019

    • Author(s)
      Kento Ohta,Takashi Nakamura, Yuta Kimura,Kazuki Tsuruta, Yusuke Tamenori, Koji Amezawa
    • Organizer
      22nd International Conference on Solid State Ionics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 固体電解質リアクターにより合成した酸素欠損Li過剰系正極の電極特性2019

    • Author(s)
      中村崇司、太田健斗、木村勇太、鶴田一樹、為則雄祐、雨澤浩史
    • Organizer
      2019年電気化学秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Li過剰系正極材料の酸素不定比性とそれが材料特性に与える影響2019

    • Author(s)
      太田健斗、中村崇司、木村勇太、鶴田一樹、為則雄祐、雨澤浩史
    • Organizer
      第45回固体イオニクス討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Mechanism of oxygen release from Li-rich cathode material for lithium ion batteries2019

    • Author(s)
      T. Nakamura, H. Gao, K. Ohta, Y. Kimura, Y. Tamenori, K. Amezawa
    • Organizer
      ECI Conference: Non-Stoichiometric Compounds VII
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 欠陥化学に基づいたリチウムイオン 電池酸化物正極における 酸素脱離メカニズムの解明2019

    • Author(s)
      中村崇司、Hongze Gao、太田健斗、 木村勇太、鶴田一樹、為則雄祐、雨澤浩史
    • Organizer
      電気化学会第86回大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 酸素脱離によるリチウム過剰系正極材料Li1.2Mn0.6Ni0.2O2の電極特性変化2019

    • Author(s)
      太田健斗、Hongze Gao、中村崇司、木村勇太、為則雄祐、鶴田一樹、雨澤浩史
    • Organizer
      電気化学会第86回大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 酸素脱離によるリチウム過剰系正極材料Li1.2Mn0.6Ni0.2O2の電子状態および結晶構造変化2018

    • Author(s)
      太田 健斗、Hongze Gao、中村 崇司、木村 勇太、雨澤 浩史
    • Organizer
      2018年電気化学会秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Li過剰系正極材料Li1.2Mn0.6Ni0.2O2の酸素脱離に伴う電気化学的特性変化2018

    • Author(s)
      太田健斗、Hongze Gao、中村崇司、木村勇太、 為則雄祐、鶴田一樹、雨澤浩史
    • Organizer
      第44回固体イオニクス討論会
    • Related Report
      2018 Research-status Report

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

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