锂离子电池硅基负极材料改性研究进展  

Improvement progress of the Si-based materials for lithium-ion batteries

作　　者：赵铁鹏[1] 高德淑[1] 李朝晖[1] 雷钢铁[1] 周姬[1] 

机构地区：[1]湘潭大学化学学院环境友好化学与应用省部共建教育部重点实验室,湖南湘潭411105

出　　处：《电源技术》2009年第1期65-68,共4页Chinese Journal of Power Sources

基　　金：湖南省自然科学基金项目(NO06JJ4093);湘潭市科技局(06KH01041)资助项目

摘　　要：锂离子电池硅基负极材料由于理论容量较高(4200mAh/g),成为最具吸引力的新一代负极材料。然而,硅在充放电过程中体积变化较大,引起电池容量的快速衰减,从而导致电池的循环性能变差。为解决此问题,表面处理、多相掺杂、形成硅化物等方法被用来改善硅基负极材料的电化学性能。综述了以上方法对硅基负极材料改性研究的最新进展,并对各种改性方法进行了简单的评述。With a high theoretical specific capacity of 4 200 mAh/g, silicon becomes one of the most attractive new materials among the anode materials for rechargeable lithium ion batteries. However, silicon powders exhibit a drastic volume variation during cycling, resulting in a rapid decline of capacity, and thus leading to a poor cyclic performance. In order to solve this problem, many methods, such as multi-phase-doped, surface etched, silicon compounds, and carbon-dispersed silicon composite were used to improve the materials＇ electrochemical performances. The effects of these methods on their electrochemical characteristics were reviewed. And various improvement methods were given briefly.

关 键 词：锂离子电池 负极材料 纳米硅 硅薄膜 硅化物 

分 类 号：TM912[电气工程—电力电子与电力传动]