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Journal of Electrochemistry ›› 2014, Vol. 20 ›› Issue (1): 51-55.doi: 10.13208/j.electrochem.130227

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Electrochemical Performance of Si-C Composites Prepared by Discharge-Plasma Assisted Milling

CHEN Yu-long, HU Ren-zong, LIU Hui, SUN Wei, ZHU Min*   

  1. School of Materials Science and Engineering, South China University of Technology,Guangdong Key Lab of Advanced Materials for Energy Storage, Guangzhou 510640, China
  • Received:2013-02-27 Revised:2013-07-01 Online:2014-02-25 Published:2014-02-24
  • Contact: ZHU Min E-mail:memzhu@scut.edu.cn

Abstract: Silicon-carbon (Si-C) composites, with microstructure of multi-scaled Si particles being homogenously dispersed in micro-sized carbon matrix, had been prepared by dielectric barrier discharge plasma assisted two-step milling for the first time. The Si-C composite anode had a discharge capacity of 1259 mAh·g-1 at the first cycle, while the capacity retained 474 and 396 mAh·g-1 after 20 and 100 cycles, respectively. Charge-discharge curves and AC impedance response indicated that both silicon and carbon phases in the composite anode were involved during the lithiation/delithiation reactions and the electron transport resistance in the Si-C composite anode was much lower than that in the pure Si anode.

Key words: lithium-ion batteries, anode, Si-C composites, discharge plasma, ball milling

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