摘要
硅基材料以其超高的理论容量(～4 200 mAh/g,Li4.4Si)受到广泛关注.但是锂的嵌入会造成硅的晶格结构发生巨大变化(>300%),并逐渐粉化,导致材料循环性能很差.该研究通过高能球磨、水热以及焙烧等处理方法制备Si/C复合材料,有效改善其性能.
Si-based materials have received tremendous attention owing to the extremely high theoretical capacity of about 4 200 mAh/g with the formation of Li4.4Si.However,dramatic volume variation（300%） during charge/discharge processes could pulverize the electrode materials,leading to poor cyclic performances.To solve this problem,Si/C composite was synthesized via high energy mechanical milling,hydrothermal treatment and annealing process,and its electrochemical performances were apparently improved.
出处
《华南师范大学学报（自然科学版）》
CAS
北大核心
2009年第A01期1-2,共2页
Journal of South China Normal University(Natural Science Edition)
基金
国家973计划(2009CB220100)
绿色化学合成技术国家重点实验室培育基地开放研究基金
台达环境与教育基金会资助
关键词
锂离子二次电池
硅基负极材料
核壳结构
Lithium-ion battery
Si based anode material
core-shell structure
作者简介
苏利伟（1984-），男，河北人，研究方向：锂离子电池材料，Email：slwhot2334@mail．nankai．edu．cn．
通信作者，Email：zhouzhen@nankai．edu.cn
