Amorphous silicon/carbon multilayer thin films as the anode for high rate rechargeable Li-ion batteries

Jun Wang*, Yongfeng Tong, Zhuang Xu, Weihua Li, Pengxun Yan, Yip-Wah Chung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We have synthesized the amorphous silicon/carbon (Si/C) multilayer thin films on Cu substrate and investigated their applications as the anode for high rate rechargeable Li-ion batteries. X-ray diffraction and Raman spectrum revealed that the films were amorphous. The electrochemical evaluation was performed with constant current charge/discharge test under various loading currents in PC. The results showed a high first initial capacity of 3107 mAh g-1 and a high first coulombic efficiency of 83% at 15C rate (60 A/g). In the following cycles, a capacity of 2000 mAh g-1 at 30C (120 A/g) and 1500 mAh g-1 at 60C (240 A/g) were attained with a retention of 99%. The test predicted that the Si/C multilayer thin films were a promising anode material for lithium ion batteries.

Original languageEnglish (US)
Pages (from-to)37-39
Number of pages3
JournalMaterials Letters
Volume97
DOIs
StatePublished - Feb 20 2013

Keywords

  • Lithium ion battery
  • Microstructure
  • Physical vapor deposition
  • Si/C multilayer thin films

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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