Acta Phys. -Chim. Sin. ›› 2009, Vol. 25 ›› Issue (04): 611-616.doi: 10.3866/PKU.WHXB20090403

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Fabrication and Performance of Cu6Sn5 Alloy Anode Using Porous Cu as Current Collector

FAN Xiao-Yong, ZHUANG Quan-Chao, WEI Guo-Zhen, KE Fu-Sheng, HUANG Ling, DONG Quan-Feng, SUN Shi-Gang   

  1. School of Materials Science and Engineering, Chang'an University, Xi'an 710061, P. R. China; 2State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China
  • Received:2008-10-31 Revised:2009-01-07 Published:2009-03-31
  • Contact: FAN Xiao-Yong, SUN Shi-Gang E-mail:fandajiao@yahoo.com.cn;sgsun@xmu.edu.cn

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Abstract:

Porous Cu was fabricated by electrodeposition through a kinetic template of hydrogen bubbles. The product was subsequently annealed to increase its structural stability. The Cu-Sn alloy was then electrodeposited onto porous Cu which served as a current collector. X-ray diffraction (XRD) studies ascertained that the composition of the Cu-Sn alloy was Cu6Sn5 and scanning electron microscopy (SEM) investigations showed a three-dimensional (3D) porous structure of the electrode. The first charge/discharge capacities of the Cu6Sn5 alloy electrode were measured respectively at 735 and 571 mAh·g-1, and a good retention of the capacities has been determined. Interfacial properties of the Cu6Sn5 alloy electrode in a commercial electrolyte were also studied by electrochemical impedance spectroscopy (EIS).

Key words: Porous Cu current collector, Cu6Sn5 alloy, Lithiumion battery, Anode, Electrochemicalimpedance spectroscopy

MSC2000: 

  • O646