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| Structure and Properties of Three-dimensional Reticular Sn-Co Alloy Electrodes as Anode Material for Lithium Batteries |
| HUANG Ling;JIANG Hong-Hong;KE Fu-Sheng;FAN Xiao-Yong;ZHUANG Quan-Chao;YANG Fang-Zu;SUN Shi-Gang |
| (Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China) |
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Abstract The three-dimensional reticular Sn-Co alloy deposits were prepared by electroplating. The structure and electrochemical performance of the electroplated three-dimensional reticular Sn-Co alloys have been investigated in detail. Experimental results show that the Sn-Co alloy film is of hexagonal solid solution, with Sn as the solvent, Co as the solute. Electrochemical tests show that the three-dimensional reticular Sn-Co alloy coating electrodes can deliver a discharge capacity of 493.4 mAh•g−1 in the first cycle. At the 50th cycle the charge was 329.6 mAh•g−1. The three-dimensional reticular structure in Sn-Co alloy electrode was beneficial in reducing the irreversible capacity of Sn-Co alloy electrode at initial charge-discharge, and in relaxing the volume expansion during cycling, which improved the cyclability of Sn-Co alloy electrode. They are also beneficial to diffusion of Li into /out of macroporous materials, and improve coulomb efficiency in charge-discharge cycle.
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Received: 19 June 2006
Published: 06 December 2006
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Corresponding Authors:
HUANG Ling
E-mail: huangl@xmu.edu.cn
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