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| Preparation and Property of Nanometer Cu--Sn Alloy Anode Material for Lithium--Ion Batteries |
| REN Jianguo; HE Xiangming; JIANG Changyin; WAN Chunrong |
| Materials Chemistry Laboratory; Institute of Nuclear and New Energy Technology; Tsinghua University; Beijing 102201 |
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Cite this article:
REN Jianguo; HE Xiangming; JIANG Changyin; WAN Chunrong. Preparation and Property of Nanometer Cu--Sn Alloy Anode Material for Lithium--Ion Batteries. Acta Metall Sin, 2006, 42(7): 727-732 .
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Abstract A reverse microemulsion technique was applied to prepare nanometer lithium storage alloy. Nanometer particles of copper-tin alloy with amorphous structures were successfully prepared. Because the electrode pulverization problem can be relieved by its small particle size, nanometer copper-tin alloy anode had a good cycle performance. However, a great irreversible capacity was caused by the formation of a SEI layer on the surface of nanometer alloy and the contact resistance between nanometer particles resulted in the poor electric conductivity. It is proved by experiments that the match of particle size and conductive agent content has a great impact on the electrochemical performance of the nanometer copper-tin alloy anode. When the conductive agent content increased to 40%, the nanometer copper-tin alloy with particle size of 50-60nm presented the best performance.
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Received: 13 October 2005
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