中国物理B ›› 2022, Vol. 31 ›› Issue (5): 58101-058101.doi: 10.1088/1674-1056/ac4481

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Enhancement of electrochemical performance in lithium-ion battery via tantalum oxide coated nickel-rich cathode materials

Fengling Chen(陈峰岭)1,2, Jiannan Lin(林建楠)4, Yifan Chen(陈一帆)4, Binbin Dong(董彬彬)4, Chujun Yin(尹楚君)1,2, Siying Tian(田飔莹)1,2, Dapeng Sun(孙大鹏)1,2, Jing Xie (解婧)1,2, Zhenyu Zhang(张振宇)4,†, Hong Li(李泓)2,3,‡, and Chaobo Li(李超波)1,2,§   

  1. 1 Institute of Microelectronics, Chinese Academy of Sciences, Beiing 100029, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    4 Beijing Welion New Energy Technology Co., Ltd, Beijing 102402, China
  • 收稿日期:2021-11-20 修回日期:2021-12-13 发布日期:2022-04-27
  • 通讯作者: Zhenyu Zhang,E-mail:zyzhang@solidstatelion.com;Hong Li,E-mail:hli@iphy.ac.cn;Chaobo Li,E-mail:lichaobo@ime.ac.cn E-mail:zyzhang@solidstatelion.com;hli@iphy.ac.cn;lichaobo@ime.ac.cn
  • 基金资助:
    Project supported by the Key Laboratory Fund (Grant No.6142804200303) from Science and Technology on Microsystem Laboratory,the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences:Original Innovation Projects from 0 to 1(Grant No.ZDBS-LY-JSC010),the Key Research and Development Project of the Department of Science and Technology of Jiangsu Province,China (Grant No.BE2020003),the Beijing Municipal Science and Technology Commission (Grant No.Z191100004719001),and the National Key Research and Development Program of China (Grant No.2017YFB0405400).

Enhancement of electrochemical performance in lithium-ion battery via tantalum oxide coated nickel-rich cathode materials

Fengling Chen(陈峰岭)1,2, Jiannan Lin(林建楠)4, Yifan Chen(陈一帆)4, Binbin Dong(董彬彬)4, Chujun Yin(尹楚君)1,2, Siying Tian(田飔莹)1,2, Dapeng Sun(孙大鹏)1,2, Jing Xie (解婧)1,2, Zhenyu Zhang(张振宇)4,†, Hong Li(李泓)2,3,‡, and Chaobo Li(李超波)1,2,§   

  1. 1 Institute of Microelectronics, Chinese Academy of Sciences, Beiing 100029, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    4 Beijing Welion New Energy Technology Co., Ltd, Beijing 102402, China
  • Received:2021-11-20 Revised:2021-12-13 Published:2022-04-27
  • Contact: Zhenyu Zhang,E-mail:zyzhang@solidstatelion.com;Hong Li,E-mail:hli@iphy.ac.cn;Chaobo Li,E-mail:lichaobo@ime.ac.cn E-mail:zyzhang@solidstatelion.com;hli@iphy.ac.cn;lichaobo@ime.ac.cn
  • About author:2021-12-18
  • Supported by:
    Project supported by the Key Laboratory Fund (Grant No.6142804200303) from Science and Technology on Microsystem Laboratory,the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences:Original Innovation Projects from 0 to 1(Grant No.ZDBS-LY-JSC010),the Key Research and Development Project of the Department of Science and Technology of Jiangsu Province,China (Grant No.BE2020003),the Beijing Municipal Science and Technology Commission (Grant No.Z191100004719001),and the National Key Research and Development Program of China (Grant No.2017YFB0405400).

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摘要： Nickel-rich cathode materials are increasingly being applied in commercial lithium-ion batteries to realize higher specific capacity as well as improved energy density. However, low structural stability and rapid capacity decay at high voltage and temperature hinder their rapid large-scale application. Herein, a wet chemical method followed by a post-annealing process is utilized to realize the surface coating of tantalum oxide on LiNi0.88Mn0.03Co0.09O2, and the electrochemical performance is improved. The modified LiNi0.88Mn0.03Co0.09O2 displays an initial discharge capacity of ～ 233 mAh/g at 0.1 C and 174 mAh/g at 1 C after 150 cycles in the voltage range of 3.0 V-4.4 V at 45℃, and it also exhibits an enhanced rate capability with 118 mAh/g at 5 C. The excellent performance is due to the introduction of tantalum oxide as a stable and functional layer to protect the surface of LiNi0.88Mn0.03Co0.09O2, and the surface side reactions and cation mixing are suppressed at the same time without hampering the charge transfer kinetics.

关键词: LiNi0.88Mn0.03Co0.09O2, tantalum oxide, surface coating, lithium-ion battery, cathode material

Abstract: Nickel-rich cathode materials are increasingly being applied in commercial lithium-ion batteries to realize higher specific capacity as well as improved energy density. However, low structural stability and rapid capacity decay at high voltage and temperature hinder their rapid large-scale application. Herein, a wet chemical method followed by a post-annealing process is utilized to realize the surface coating of tantalum oxide on LiNi0.88Mn0.03Co0.09O2, and the electrochemical performance is improved. The modified LiNi0.88Mn0.03Co0.09O2 displays an initial discharge capacity of ～ 233 mAh/g at 0.1 C and 174 mAh/g at 1 C after 150 cycles in the voltage range of 3.0 V-4.4 V at 45℃, and it also exhibits an enhanced rate capability with 118 mAh/g at 5 C. The excellent performance is due to the introduction of tantalum oxide as a stable and functional layer to protect the surface of LiNi0.88Mn0.03Co0.09O2, and the surface side reactions and cation mixing are suppressed at the same time without hampering the charge transfer kinetics.

Key words: LiNi0.88Mn0.03Co0.09O2, tantalum oxide, surface coating, lithium-ion battery, cathode material

中图分类号:  (Surface treatments)

  • 81.65.-b
81.40.Np (Fatigue, corrosion fatigue, embrittlement, cracking, fracture, and failure) 81.15.-z (Methods of deposition of films and coatings; film growth and epitaxy) 47.20.Hw (Morphological instability; phase changes)