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

作者：Zhou Xiang yang; Zou You lan; Yang Juan^*; Xie Jing; Wang Song can

来源：Journal of Central South University, 2013, 20(2): 326-331.

DOI：10.1007/s11771-013-1491-1

• Sn-Co-C composite
• hydrolysis
• carbothermal technology
• electrochemical performance
• lithium ion battery

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.

• 出版日期2013-2
• 单位中南大学