Preparation and electrochemical properties of nano-Si/C composites

被引：0
|
作者：
Chen Xiao-hong [1 ]
Song Huai-he [1 ]
Yang Shu-bin [1 ]
机构：
[1] Beijing Inst Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
来源：
NEW CARBON MATERIALS | 2007年 / 22卷 / 03期
关键词：
heavy oil; Si powders; composite; lithium ion secondary battery; anode materials;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A nano-Si/C composite as the anode material for a lithium-ion secondary battery was prepared by polymerization and condensation of petroleum heavy oil with dispersed nano-Si powders at 460 degrees C and carbonization at 900 degrees C. The influences of adding nano-Si powders to heavy oil on yield, microstructures and electrochemical properties were investigated. Results showed that the addition of nano-Si powders is beneficial for increasing the yield of solid products. Nano-Si powders were uniformly embedded in the carbon matrix and the crystallinity of nano-Si powders had no change before and after polymerization. The nano-Si/C composite had a first reversible capacity of 498 mAh/g and a cycle efficiency of 90 %.
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页码：235 / 241
页数：7
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