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Preparation of Sn-Coated Mesophase Graphite Powders by Carbothermal Reduction

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Abstract:

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.

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Periodical:

Key Engineering Materials (Volumes 373-374)

Pages:

738-741

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.373-374.738

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Online since:

March 2008

Authors:

Yi Ruei Jhan, Ting Fang, Su Yueh Tsai, Jenq Gong Duh

Keywords:

Capacity Retention, Composite Anode, Cycleability, Mesophase Graphite Powders, Sn

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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