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高等学校化学研究 ›› 2020, Vol. 36 ›› Issue (4): 690-693.doi: 10.1007/s40242-020-0198-8

• Articles • 上一篇    下一篇

Operando Observation of Structural Evolution and Kinetics of Li[Ni0.6Co0.2Mn0.2]O2 at Elevated Temperature

ZHANG Guobin1,2, PAN Xuelei1, YU Kesong1, YAN Mengyu1, XIONG Fangyu1, WU Liming1, DENG Xuanwei1, ZHANG Haining1, MAI Liqiang1,3   

  1. 1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China;
    2. Department of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, P. R. China;
    3. Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan 528200, P. R. China
  • 收稿日期:2020-06-20 修回日期:2020-07-17 出版日期:2020-08-01 发布日期:2020-07-30
  • 通讯作者: YAN Mengyu, MAI Liqiang E-mail:mlq518@whut.edu.cn;ymymiles@whut.edu.cn
  • 基金资助:
    Supported by the Project of the Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, China(No.XHT2020-003), the National Natural Science Foundation of China(No.51521001), the National Key Research and Development Program of China(No.2016YFA0202603) and the Fundamental Research Funds for the Central Universities of China(No.WUT: 205201019).

Operando Observation of Structural Evolution and Kinetics of Li[Ni0.6Co0.2Mn0.2]O2 at Elevated Temperature

ZHANG Guobin1,2, PAN Xuelei1, YU Kesong1, YAN Mengyu1, XIONG Fangyu1, WU Liming1, DENG Xuanwei1, ZHANG Haining1, MAI Liqiang1,3   

  1. 1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China;
    2. Department of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, P. R. China;
    3. Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan 528200, P. R. China
  • Received:2020-06-20 Revised:2020-07-17 Online:2020-08-01 Published:2020-07-30
  • Contact: YAN Mengyu, MAI Liqiang E-mail:mlq518@whut.edu.cn;ymymiles@whut.edu.cn
  • Supported by:
    Supported by the Project of the Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, China(No.XHT2020-003), the National Natural Science Foundation of China(No.51521001), the National Key Research and Development Program of China(No.2016YFA0202603) and the Fundamental Research Funds for the Central Universities of China(No.WUT: 205201019).

摘要: Li[Ni0.6Co0.2Mn0.2]O2(NCM622) is one of the best commercialized cathodes in the battery field. However, poor cyclability at relatively high temperature hinders its multiple usages. Here, operando tests were performed to investigate the phase transitions and electron/ion transfer process of layered NCM622 at 25 and 55℃. The identified spinel structure resulting in the poor cyclability at 55℃ guides the commercialization of batteries at high temperature.

关键词: Lithium-ion battery, NCM622, High temperature, In situ X-ray diffraction (XRD)

Abstract: Li[Ni0.6Co0.2Mn0.2]O2(NCM622) is one of the best commercialized cathodes in the battery field. However, poor cyclability at relatively high temperature hinders its multiple usages. Here, operando tests were performed to investigate the phase transitions and electron/ion transfer process of layered NCM622 at 25 and 55℃. The identified spinel structure resulting in the poor cyclability at 55℃ guides the commercialization of batteries at high temperature.

Key words: Lithium-ion battery, NCM622, High temperature, In situ X-ray diffraction (XRD)