摘要
鉴于天然微晶石墨资源丰富,嵌锂容量较高的特点,对天然微晶石墨进行了粉体分级和表面包覆处理,以提高微晶石墨用作锂离子电池负极材料的首次循环效率、可逆容量和使用寿命。实验表明,微晶石墨经过颗粒分级和表面包覆碳膜的处理后,其首次循环效率提高至90%,循环稳定性也得到了明显改善。
In view of rich source and high capacity,natural microcrystalline graphite were treated by particle grading and surface coating in order to improve the initial cycle efficiency,reversible capacity and cycle life as an anode material for lithium ion battery.The experiments results proved that the first cycle efficiency of microcrystalline graphite was increased to be 90% and cycle stability was also improved after particle grading and surface coating.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2010年第4期674-676,共3页
Journal of Functional Materials
基金
重庆市自然科学基金资助项目(CSTC
2009BB4206)
关键词
微晶石墨
表面包覆
负极材料
锂离子电池
microcrystalline graphite
surface coating
anode materials
lithium ion battery
