Electrochemical characteristics of silicon-metals coated graphites for anode materials of lithium secondary batteries

In Chul Kim, Dongjin Byun, Joong Kee Lee

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


Four kinds of silicon-metals (Cu, Ni, Sn)-graphite composites for anode active materials of lithium secondary batteries were prepared by sequential employment of PECVD (Plasma enhance chemical vapor deposition) and RF(Radio-frequency)-magnetron sputtering method. The silicon-copper-graphite composite showed the highest reversible capacity and cyclability among the silicon-metal composite graphite samples prepared. The enhanced electrochemical performance of silicon-copper-graphite composite is attributed to the formation of copper silicide on the surface of graphite. The copper silicide plays an important role as a buffering layer against volume change of silicon during the intercalation/deintercalation due to the chemical bonding of silicon and copper, and has lower interfacial impedance than that of other silicon-metal-graphite composites which may lead to low irreversible capacity.

Original languageEnglish
Pages (from-to)661-665
Number of pages5
JournalJournal of Electroceramics
Issue number2-4
Publication statusPublished - 2006 Dec

Bibliographical note

Funding Information:
Acknowledgement This research was supported by a grant(code #05K1501-01920) from ’Center for Nanostructured Materials Technology’ under ’21st Century Frontier R&D Programs’ of the Ministry of Science and Technology, Korea.

Copyright 2008 Elsevier B.V., All rights reserved.


  • Anode
  • Lithium ion battery
  • Metal-silicide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering
  • Materials Chemistry


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