Energy Storage Science and Technology ›› 2020, Vol. 9 ›› Issue (5): 1383-1395.doi: 10.19799/j.cnki.2095-4239.2020.0220

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Research progress of transition metal oxide micro-nano structured arrays for sodium-ion batteries

Siyu ZHOU(), Zheng TANG, Jingrui FAN, Yougen TANG, Dan SUN, Haiyan WANG()   

  1. Chemistry and Chemical Engineering of Central South University, Changsha 410083, Hunan, China
  • Received:2020-06-19 Revised:2020-07-03 Online:2020-09-05 Published:2020-09-08
  • Contact: Haiyan WANG E-mail:1282068071@qq.com;wanghy419@csu.edu.cn

Abstract:

Sodium ion battery is expected to be widely applied in the field of scalable energy storage due to its abundant sodium resources and relatively low cost. As electrode materials for sodium-ion battery, the transition metal oxides generally store sodium based on conversion reaction, which have high theoretical capacity and good application prospect. However, the electrochemical performance of traditional transition metal oxide electrodes is greatly limited by large volume change, poor cycle performance, voltage hysteresis, inferior rate performance and low initial coulombic efficiency. In order to overcome the above limitations, the active material is usually designed as a self-supported array electrode with a three-dimensional structure. With the advantages of large open space, suitable specific surface area, good conductivity, and close contact between active material and current collector, the 3D array electrode can significantly improve the performance of transition metal oxides when applied in sodium ion batteries. In the present work, the research advances of transition metal oxide micro-nano structured arrays for sodium-ion batteries in recent years have been reviewed, and the outlook has also been given.

Key words: transition metal oxides, array structure, sodium-ion battery

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