Energy Storage Science and Technology ›› 2023, Vol. 12 ›› Issue (1): 139-149.doi: 10.19799/j.cnki.2095-4239.2022.0337

• Energy Storage Materials and Devices • Previous Articles     Next Articles

Progress of the Jahn-Teller effect suppression method for manganese-based sodium-ion battery cathode materials

Shaocong WANG(), Wei LI(), Ruiqin HUANG, Yifei GUO, Zheng LIU()   

  1. School of Chemical and Biological Engineering, Guilin University of Technology, Guangxi Key Laboratory of Electromagnetic Chemical Functional Substances, Guilin 541004, Guangxi, China
  • Received:2022-06-17 Revised:2022-06-26 Online:2023-01-05 Published:2023-02-08
  • Contact: Wei LI, Zheng LIU E-mail:1012780687@qq.com;liwei1986gllg@163.com;lisa4.6@163.com

Abstract:

In this study, the research results in recent years of the Jahn-Teller effect suppression methods for manganese-based sodium-ion battery cathode materials at home and abroad were reviewed. Doping and coating are the main methods to suppress the Jahn-Teller effect in manganese-based electrode materials. This study first introduces the crystal structures and electrochemical properties of manganese base-transition metal oxides and Na2MnPO4F polyanionic compounds in sodium-ion battery cathode materials. Then, it focuses on two inhibition methods, doping and cladding, and their inhibition effects. Doping is, therefore, better than coating in suppressing the Jahn-Teller effect. The hot spots of doping research are mainly related to metal cation doping, nonmetal anion doping, oxygen vacancy generation, and coating, which can effectively isolate the electrode material from the electrolyte and suppress the Jahn-Teller effect to a certain extent. Finally, it is concluded that the most effective way to suppress the Jahn-Teller effect is to start from the material's structure by controlling the Mn—O bond length to ensure that the material structure is not distorted and the Mn3+ concentration is reduced accordingly. This study's systematic review of Jahn-Teller effect suppression methods is expected to provide a theoretical basis for future suggestions of novel Jahn-Teller effect suppression techniques.

Key words: sodium ion batteries, polyanionic compounds, cathode materials, Jahn-Teller effect, manganese ions

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