摘要
Electrochemically active Sn-Si-C composite was synthesized by high energy ball milling(HEBM) in Ar atmosphere.The so-obtained composite was characterized by X-ray diffraction and field emission scanning electron microscopy.Lithium insertion/extraction characteristics of the composites were examined by constant current charge-discharge and cyclic voltammetry methods.The results show that there is no new alloy generated by HEBM.The composite synthesized by two-step HEBM resulted in initial lithium insertion specific capacity as high as 1224 mA×h/g and higher reversible lithium extraction specific capacity of 855 mA×h/g.
Electrochemically active Sn-Si-C composite was synthesized by high energy ball milling（HEBM） in Ar atmosphere.The so-obtained composite was characterized by X-ray diffraction and field emission scanning electron microscopy.Lithium insertion/extraction characteristics of the composites were examined by constant current charge-discharge and cyclic voltammetry methods.The results show that there is no new alloy generated by HEBM.The composite synthesized by two-step HEBM resulted in initial lithium insertion specific capacity as high as 1224 mA×h/g and higher reversible lithium extraction specific capacity of 855 mA×h/g.
出处
《过程工程学报》
CAS
CSCD
北大核心
2011年第5期869-874,共6页
The Chinese Journal of Process Engineering
基金
Supported by National Key Programfor Basic Research of China(973)(No.2002 CB211800
2009 CB220100-G)
