Energy Storage Science and Technology ›› 2020, Vol. 9 ›› Issue (5): 1350-1369.doi: 10.19799/j.cnki.2095-4239.2020.0179

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Recent progress and application challenges in V-based polyanionic compounds for cathodes of sodium-ion batteries

Hongming YI1,2(), Zhiqiang LYU1,2, Huamin ZHANG1, Mingming SONG3, Qiong ZHENG1(), Xianfeng LI1()   

  1. 1.Dalian Institute of Chemical Physics, Dalian 116023, Liaoning, China
    2.University of Chinese Academy of Sciences, Beijing 100039, China
    3.Dalian Bolong New Materials Co. Ltd. , Dalian 116023, Liaoning, China
  • Received:2020-05-17 Revised:2020-05-28 Online:2020-09-05 Published:2020-09-08
  • Contact: Qiong ZHENG,Xianfeng LI E-mail:yihm@dicp.ac.cn;zhengqiong@dicp.ac.cn;lixianfeng@dicp.ac.cn

Abstract:

Sodium-ion batteries have potential applications in the field of electric bicycles, low-speed electric vehicles, and stationary energy storage due to the abundance and low cost of sodium resources. Of the various cathode materials proposed for sodium-ion batteries, vanadium (V)-based polyanionic compounds have become a research hotpot due to their high energy density, high power density, and stable structure. However, the low intrinsic conductivity and improper preparation method of such compounds impede their bulk electron and ion transfer, which limit the specific capacity, rate capability, and structure stability of these materials. In this review, starting from an analysis of the cell structure and sodium storage characteristics of several typical V-based polyanionic compounds, we review the charge transfer process, strategy for improving the kinetics, and progress in V-based polyanionic compounds from the perspective of the microstructure and mesoscopic electrode structure. Meanwhile, combined with a discussion of the practical applications of V-based polyanionic compounds, the important research directions to promote the further development of V-based polyanionic compounds are summarized.

Key words: sodium-ion batteries, cathode materials, V-based polyanionic compounds, charge transfer kinetics, low-cost and scale preparation, industrialization

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