摘要
锂离子电池因其质量轻,能量密度高等优良性能,是近几年来电化学界研究的热点。但锂离子电池用石墨作负极还存在一些问题,需要对石墨改性处理。本文介绍了石墨的一种改性方法:沥青包覆石墨法,可有效降低石墨的比表面积,从而大幅度提高了石墨负极材料的首次可逆容量和库仑效率,改善电池的循环性能等。
Lithium-ion battery is becoming the power sources of choice for modern consumer electronic devices ,because of its small mass density and large capacity density. The method for modification of graphite negative electrode in lithium-ion batteries is reviewed from the essences of graphite modification：pitch coating graphite. With this method,surface area could be reduced effectively and the first reversible capacity and coulombic efficiency are improved.
出处
《炭素》
2007年第2期16-19,共4页
Carbon
关键词
锂离子电池
石墨
负极材料
沥青
包覆
Lithium-ion battery
graphite
negative electrode materials
pitch
coating
