Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 6, Issue 5, Pages 465-469Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2004.03.005
Keywords
lithium ion battery; mechanochemical reduction; anode materials; carbon-coating
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A carbon-coated nano-Si dispersed oxides/graphite composite has been prepared and investigated as a potential anode material for lithium ion batteries. The nano-Si dispersed oxides were synthesized by mechanochemical reduction of SiO by A1, and carbon has been coated onto the ball milled mixture of nano-Si dispersed oxide/graphite by utilizing pyrolysis of coal-tar pitch at 900degreesC in an argon flow. The carbon-coated composites show excellent cycling performance with a reasonable value of the first irreversible capacity. The superior electrochemical characteristics are attributed to the uniform distribution of nano-sized Si phase, the buffering action of graphite and an enhanced connection for electronic and ionic conduction by carbon-coating. (C) 2004 Elsevier B.V. All rights reserved.
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