摘要
负极理论容量最大的硅在充放电过程中,体积过度膨胀粉化导致容量衰减快,成为其作为商用负极材料的最大障碍。碳材料不仅具有一定的电化学活性,结构也较稳定,可以作为硅电极的"缓冲基体";具有高容量和优良循环性能的硅-碳复合负极材料已经成为该领域的研究热点。按照碳材料的分类,评述了Si/C复合电极材料,并初步展望了该领域的研究方向。
Silicon shows the largest theoretical capacity as an anode material in lithium ion batteries. However, its commercialization is greatly prevented by drastic capacity fade during cyclings. Carbon materials possess stable structure as well as good electro-conductivity, and are considered as ideal ＂buffering matrix＂ for silicon anode. The research on Si/C composites with high capacity and good cycling properties has caused great attention. Herein, various Si/C composite anodes based on categories of carbon materials are reviewed and possible approaches for future work are proposed.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2009年第19期104-108,共5页
Materials Reports
基金
国家十一五科技支撑计划项目(2008BAE60B00)
关键词
锂离子电池
负极材料
硅-碳复合材料
缓冲基体
lithium-ion batteries, anode materials, silicon-carbon composites, buffering matrix
