Energy Storage Science and Technology ›› 2020, Vol. 9 ›› Issue (5): 1318-1326.doi: 10.19799/j.cnki.2095-4239.2020.0095

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Research progress on metal oxides/sulfides/selenides anode materials of sodium ion batteries

Guangling WEI1(), Ying JIANG1, Jiahui ZHOU1, Ziheng WANG1, Yongxin HUANG1, Man XIE1(), Feng WU1,2   

  1. 1.School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
    2.Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing 100081, China
  • Received:2020-03-07 Revised:2020-03-25 Online:2020-09-05 Published:2020-09-08
  • Contact: Man XIE E-mail:weiglbit@163.com;xmxm@bit.edu.cn

Abstract:

Low-cost and environmentally friendly sodium-ion batteries (SIBs) have great application prospects in the next generation of low-speed electric vehicle power and large-scale energy storage systems. The key to promoting the commercial application of SIBs is to develop electrode materials with excellent electrochemical performance and a low-cost. It is important to explore and fabricate appropriate high-performance SIB anodes. Compounds composed of oxygen/sulfur/selenium in group VI A as SIB anodes are low cost and environmentally friendly and have high theoretical capacity and safety, therefore attracting extensive attention from researchers. However, oxide/sulfide/selenide-anode materials cannot meet the rate performance demand due to their low electrical conductivity. In addition, the electrochemical cycling process is accompanied by a huge volume expansion, resulting in the crushing of the electrode, hindering the application of oxides/sulfides/selenides. Examining recent literature, this paper reviews the sodium storage mechanism of oxide/sulfide/selenide-anode materials and discusses their advantages and challenges. Some modification methods, such as composites with conductive carbon, structure control, and electrolyte improvement, are summarized as possible solutions to problems such as low conductivity, self-agglomeration, and sluggish kinetics. Finally, the development prospects of oxides/sulfides/selenides are forecasted for SIB anodes.

Key words: sodium ion batteries, anode materials, metal oxides, metal sulfides, metal selenides

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