阳极
锂(药物)
材料科学
复合数
星团(航天器)
纳米-
化学工程
纳米技术
复合材料
化学
电极
计算机科学
物理化学
内分泌学
程序设计语言
工程类
医学
作者
Tomokazu Morita,Norio Takami
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2006-02-01
卷期号:153 (2): A425-A425
被引量:137
摘要
Nanosilicon cluster-SiO x -C composites including nanosize Si particles were prepared by using the disproportionation of silicon mono-oxide and the polymerization of furfuryl alcohol. The applicability of nanosilicon composites as anode material for rechargeable lithium batteries was investigated on the basis of X-ray diffraction measurement, observation by transmission electron microscopy (TEM) and electrochemical studies. TEM analysis showed that Si clusters in the range of 2-10 nm were distributed homogeneously within silicon oxide phases. The nanosilicon composite anode had a large capacity of ca. 700 mAh/g and a long cycle life of >200 cycles. The improvement of cyclability is due to the nanosize Si particles and their uniform dispersion within the silicon oxide phase retained by the carbon matrix, which could effectively suppress the pulverizing of Si particles by the volume change during lithium insertion and extraction.
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