Preparation of Sn-Coated Mesophase Graphite Powders by Carbothermal Reduction
Recently, combination of ductile carbonaceous materials with the metallic Sn has received a great deal of interest to be a novel anode material for lithium ion batteries, because of their higher capacity than the conventional graphite anodes and better cycleability than the pure Sn anodes. Electrochemical performance of the Sn/C composite anodes is influenced by the material system, particle size and size distribution of Sn as well as the amount of deposited Sn. This study revealed that a favorable Sn/C composite anode exhibited reduced size and uniformly distributed tin particles. The crystal structure, morphology and elemental distribution were analyzed by XRD patterns, SEM and EPMA, respectively. The carbothermal-reducted Sn/Mesophase graphite powder (MGP) composite anodes exhibited much higher capacity than the bare MGP, and the initial efficiency was also much higher than the metallic tin anode in literatures.
M.K. Lei, X.P. Zhu, K.W. Xu and B.S. Xu
Y. R. Jhan et al., "Preparation of Sn-Coated Mesophase Graphite Powders by Carbothermal Reduction", Key Engineering Materials, Vols. 373-374, pp. 738-741, 2008