期刊
ELECTROCHEMICAL AND SOLID STATE LETTERS
卷 7, 期 10, 页码 A306-A309出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.1792242
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Si composite negative electrodes for lithium secondary batteries degrade in the dealloying period with an abrupt increase in internal resistance that is caused by a breakdown of conductive network made between Si and carbon particles. This results from a volume contraction of Si particles after expansion in the previous alloying process. Due to the large internal resistance, the dealloying reaction is not completed while Si remains as a lithiated state. The anodic performance is greatly improved either by applying a pressure on the cells or loading a larger amount of conductive carbon in the composite electrodes. (C) 2004 The Electrochemical Society.
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