Phisics and Electronic Science

Effect of silicon/carbon composite structure on its electrochemical performance as a lithium-ion battery anode

  • Xiaohua TIAN ,
  • Chenlu YU ,
  • Han ZHENG ,
  • Zhuo SUN ,
  • Zhejuan ZHANG ,
  • Xianqing PIAO
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  • Engineering Research Center for Nanophotonics and Advanced Instrument (Ministry of Education), School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China

Received date: 2021-04-23

  Online published: 2022-01-18

Abstract

Porous silicon/hard carbon composite (Si@CTS) was successfully fabricated using liquidphase encapsulation and a low-temperature pyrolysis process, in which silicon particles from cutting waste in the manufacturing of crystalline silicon solar cells was used as a raw material and chitosan as carbon source. In this paper, the electrochemical performance of Si@CTS and a mixture of Si@CTS and graphite (Si@CTS/G) as anode materials of a lithium-ion battery was studied. The Si@CTS electrode showed a high discharge specific capacity of 1672.8 mAh/g and a high initial coulombic efficiency of 84.45%. After 100 cycles, the Si@CTS retained a reversible capacity of 626.4 mAh/g. The discharge specific capacity of the Si@CTS/G composite was 698.1 mAh/g; hence, the discharge specific capacity of the Si@CTS/G composite was higher than that of Si@CTS and offered better stability. The findings are critical for mass manufacture and deployment of silicon/carbon anodes with high capacity and stability in lithium-ion batteries.

Cite this article

Xiaohua TIAN , Chenlu YU , Han ZHENG , Zhuo SUN , Zhejuan ZHANG , Xianqing PIAO . Effect of silicon/carbon composite structure on its electrochemical performance as a lithium-ion battery anode[J]. Journal of East China Normal University(Natural Science), 2022 , 2022(1) : 52 -61 . DOI: 10.3969/j.issn.1000-5641.2022.01.007

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