Abstract Using nano-Si, graphite and potato starch as raw materials, Si-graphite /carbon composites were prepared in this paper. The effects of preparation conditions of the composites on their electrochemical performances were investigated. The morphology and crystalline structure of composites were further studied by scanning electron microscopy and X-ray diffractometer. The results show that the composite prepared under the optimum condition (m(Si)/m(graphite) in composite is 1∶4, milling time is 10 h) shows a good cycling performance with a reversible capacity of 466 mA·h/g after 20 cycles. The following analysis indicates that both nano-Si and graphite in composite contribute to the total reversible capacity. Moreover, the morphology and crystalline structure of graphite with higher content in the composites are the key factors affecting the capacity of the composites.
The project supported by the National Natural Science Foundation of China (Grant No. 21203258), and sharing fund of Chongqing University's large-scale equipment (Grant No. 2013121543); the Fundamental Research Funds for the Central Universities (Grant No. CQDXWL-2013-018).
ZHAO Shuo, CHEN Ming-Lu, XIAN Xiao-Chao, ZHANG Yong, XIANG Jun, SUN Lei-Ming.Electrochemical Performances of Si-graphite/carbon Composites as Anode Materials for Lithium-Ion Batteries[J] Chemcial Industry and Engineering, 2014,V31(3): 50-55
2014, Vol. 31 
