Chem. J. Chinese Universities ›› 2019, Vol. 40 ›› Issue (9): 1972.doi: 10.7503/cjcu20190083

• Physical Chemistry • Previous Articles     Next Articles

Preparation of V2O3 Hollow Spheres for Lithium Sulfur Batteries

LI Xin,CHEN Liang(),MA Xiaotao,ZHANG Ding,XU Shoudong,ZHOU Xianxian,DUAN Donghong,LIU Shibin()   

  1. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2019-01-29 Online:2019-09-10 Published:2019-09-09
  • Contact: CHEN Liang,LIU Shibin E-mail:chenliang@tyut.edu.cn;sbliu@tyut.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(21706171, 21506141, 21606158);? the Key Research and Development Program of Shanxi Province, China(No.201803D121120).(201803D121120)

Abstract:

The prepared V2O5 hollow spheres were reduced to V2O3 hollow spheres with the assistance of NH3 at high temperature. The morphology and structure of the V2O3 hollow spheres were characterized by transmission electron microscopy(TEM), scanning electron microscopy(SEM), powder X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS). The powder of V2O3 hollow spheres and sulfur was mixed directly without further thermal treatment and the mixture was used as the cathode of lithium-sulfur batteries. The electrochemical test show that the initial capacity reaches 1375 mA·h/g and the capacity after 100 cycles is 815 mA·h/g at 0.2C; even at 1C, the initial capacity reaches 710 mA·h/g and the capacity after 500 cycles is 530 mA·h/g. The results indicate that the addition of V2O3 hollow sphere in the lithium sulfur battery can effectively improve the cycle performance.

Key words: Vanadium trioxide, Cathode material, Lithium sulfur battery

CLC Number: 

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