Journal of Electroceramics

, Volume 17, Issue 2–4, pp 661–665 | Cite as

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

2. Energy: Fuel cells, batteries etc.


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.


Lithium ion battery PECVD Anode Metal-silicide 


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Copyright information

© Springer Science + Business Media, LLC 2006

Authors and Affiliations

  1. 1.Department of Material Science and EngineeringKorea UniversitySeoulKorea
  2. 2.Advanced Energy Materials Processing Laboratory, Battery Research CenterKorea Institute of Science and TechnologySeoulKorea

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