Layer by layer synthesis of Sn-Co-C microcomposites and their application in lithium ion batteries  

作　　者：周向阳 邹幽兰 杨娟 谢静 王松灿 

机构地区：[1]School of Metallurgical Science and Engineering, Central South University

出　　处：《Journal of Central South University》2013年第2期326-331,共6页中南大学学报（英文版）

基　　金：Projects(51074185, 51274240) supported by the National Natural Science Foundation of China;Project supported by the Fundamental Research Funds for the Central Universities

摘　　要：Alloy anodes were studied for pursuing Sn-based microcomposite synthesis, assembly and performance for lithium ion batteries. The self-assembled Sn-Co-C composites with nano-scaled microstructures were prepared via solution method and carbothermal technology. The morphology and physical structure were investigated with scanning electron microscope (SEM) and X-ray diffraction (XRD). The as-prepared materials were assembled to half cell coin for the purpose of discussing the galvanostatic cycling, cyclic voltammetry and rate-capability performance. Results reveal that nanoscaled CoSn 2 alloys covered with Sn and C layer by layer are wrapped by cross-linked porous carbon network to form spherical microstructure. This distinguishing feature of Sn-Co-C composites provides a possible solution to the problems of Sn particle aggregation and poor electron transport, and has strong effect on improving electrochemical performance.Alloy anodes were studied for pursuing Sn-based microcomposite synthesis, assembly and performance for lithium ion batteries. The self-assembled Sn-Co-C composites with nano-scaled microstructures were prepared via solution method and carbothermal technology. The morphology and physical structure were investigated with scanning electron microscope （SEM） and X-ray diffraction （XRD）. The as-prepared materials were assembled to half cell coin for the purpose of discussing the galvanostatic cycling, cyclic voltammetry and rate-capability performance. Results reveal that nanoscaled CoSn2 alloys covered with Sn and C layer by layer are wrapped by cross-linked porous carbon network to form spherical microstructure. This distinguishing feature of Sn-Co-C composites provides a possible solution to the problems of Sn particle aggregation and poor electron transport, and has strong effect on improving electrochemical performance.

关 键 词：Sn-Co-C composite HYDROLYSIS carbothermal technology electrochemical performance lithium ion battery 

分 类 号：TM912[电气工程—电力电子与电力传动]