期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 153, 期 7, 页码 A1341-A1344出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.2199435
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Silicon/carbon and silicon/carbon/graphite composites have been synthesized at room temperature using concentrated H2SO4 as a dehydration agent. As a ductile matrix, the novel amorphous carbon obtained from the dehydration process could effectively buffer the volume change of silicon particles during discharge-charge cycling. The introduction of graphite in the silicon/carbon composite further improved the cycling performance. The composite with 30 wt % of amorphous carbon replaced by graphite demonstrated a stable capacity of 712.8 mAh g(-1) and a high capacity retention ratio of 84.1% at 0.1 C over 50 cycles, suggesting it is a favorable candidate as anode material for lithium-ion batteries. (c) 2006 The Electrochemical Society.
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