Energy Storage Science and Technology ›› 2020, Vol. 9 ›› Issue (5): 1416-1427.doi: 10.19799/j.cnki.2095-4239.2020.0169

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Modulating anionic redox reaction in layered transition metal oxides for sodium-ion batteries

Wei ZHENG(), Qiong LIU, Zhouguang LU()   

  1. Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, Guangdong, China
  • Received:2020-05-08 Revised:2020-05-28 Online:2020-09-05 Published:2020-09-08
  • Contact: Zhouguang LU E-mail:zhengorwei@163.com;luzg@sustech.edu.cn

Abstract:

Sodium-ion batteries (SIBs) are attractive for large-scale energy storage due to the abundance and low cost of sodium resources. However, cathode materials with single transition metal redox have limited capacity, hindering their further application. Recently, layered transition metal oxides have shown high specific capacity owning to the redox of transition metals and oxygen and have emerged as a new path to optimize the electrochemical performance of cathodes. Therefore, it is important to investigate the special structure and evolution mechanism in anionic redox reaction. In this study, the formation mechanism and structural regulation in anionic redox reaction are presented. This review is expected to offer a reference for designing high-performance cathode materials in SIBs.

Key words: sodium-ion batteries, cathode materials, layered transition metal oxides, anionic redox reaction, modulating lattice oxygen redox

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