中国物理B ›› 2022, Vol. 31 ›› Issue (9): 98201-098201.doi: 10.1088/1674-1056/ac6b21

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Designing a P2-type cathode material with Li in both Na and transition metal layers for Na-ion batteries

Jianxiang Gao(高健翔)1, Kai Sun(孙凯)1,†, Hao Guo(郭浩)1, Zhengyao Li(李正耀)1, Jianlin Wang(王建林)2, Xiaobai Ma(马小柏)1, Xuedong Bai(白雪东)2, and Dongfeng Chen(陈东风)1,‡   

  1. 1 China Institute of Atomic Energy, Beijing 102413, China;
    2 State Key Laboratory for Surface Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2022-01-13 修回日期:2022-04-22 接受日期:2022-04-28 出版日期:2022-08-19 发布日期:2022-08-19
  • 通讯作者: Kai Sun, Dongfeng Chen E-mail:ksun@ciae.ac.cn;dongfeng@ciae.ac.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12105372 and 51991344), President's Foundation of China Institute of Atomic Energy (Grant No. 16YZ202212000201), and Chinese Academy of Sciences (Grant No. XDB33000000).

Designing a P2-type cathode material with Li in both Na and transition metal layers for Na-ion batteries

Jianxiang Gao(高健翔)1, Kai Sun(孙凯)1,†, Hao Guo(郭浩)1, Zhengyao Li(李正耀)1, Jianlin Wang(王建林)2, Xiaobai Ma(马小柏)1, Xuedong Bai(白雪东)2, and Dongfeng Chen(陈东风)1,‡   

  1. 1 China Institute of Atomic Energy, Beijing 102413, China;
    2 State Key Laboratory for Surface Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2022-01-13 Revised:2022-04-22 Accepted:2022-04-28 Online:2022-08-19 Published:2022-08-19
  • Contact: Kai Sun, Dongfeng Chen E-mail:ksun@ciae.ac.cn;dongfeng@ciae.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 12105372 and 51991344), President's Foundation of China Institute of Atomic Energy (Grant No. 16YZ202212000201), and Chinese Academy of Sciences (Grant No. XDB33000000).

摘要: P2-type layered oxides have been considered as promising cathode materials for Na-ion batteries, but the capacity decay resulting from the Na+/vacancy ordering and phase transformation limits their future large-scale applications. Herein, the impact of Li-doping in different layers on the structure and electrochemical performance of P2-type Na0.7Ni0.35Mn0.65O2 is investigated. It can be found that Li ions successfully enter both the Na and transition metal layers. The strategy of Li-doping can improve the cycling stability and rate capability of P2-type layered oxides, which promotes the development of high-performance Na-ion batteries.

关键词: Na0.7Ni0.35Mn0.65O2, Li-doping, P2-type cathode, Na-ion batteries

Abstract: P2-type layered oxides have been considered as promising cathode materials for Na-ion batteries, but the capacity decay resulting from the Na+/vacancy ordering and phase transformation limits their future large-scale applications. Herein, the impact of Li-doping in different layers on the structure and electrochemical performance of P2-type Na0.7Ni0.35Mn0.65O2 is investigated. It can be found that Li ions successfully enter both the Na and transition metal layers. The strategy of Li-doping can improve the cycling stability and rate capability of P2-type layered oxides, which promotes the development of high-performance Na-ion batteries.

Key words: Na0.7Ni0.35Mn0.65O2, Li-doping, P2-type cathode, Na-ion batteries

中图分类号:  (Electrodes)

  • 82.45.Fk
88.80.ff (Batteries) 71.20.Dg (Alkali and alkaline earth metals)