Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (03): 561-566.doi: 10.3866/PKU.WHXB20100231

• ELECTROCHEMISTRY • Previous Articles     Next Articles

Electrodeposition and Electrochemical Properties of Ternary Sn-Co-Zn Alloy Electrodes as Anodes for Lithium-Ion Batteries

CHANG Yu-Qing, HUANG Ling, SUN Shi-Gang   

  1. State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China
  • Received:2009-07-22 Revised:2009-10-29 Published:2010-03-03
  • Contact: HUANG Ling E-mail:huangl@xmu.edu.cn

Abstract:

A ternary Sn-Co-Zn alloy film was successfully prepared by electrodepositi on copper foil. Electrochemical deposition of the Sn-Co-Zn alloy was studied by cyclic voltammetry (CV) and chronoamperometry (CA). The structure and electrochemical performance of the electroplated Sn-Co-Zn alloy electrodes were also investigated in detail. The CV and CA results revealed that the initial deposition kinetics of the Sn-Co-Zn alloy corresponds to a model that includes a three-dimensional progressive nucleation and diffusion controlled growth. XRD results showed that the electrodeposited Sn-Co-Zn alloy consists of CoSn3, Co3Sn2, and Zn phase. Electrochemical tests indicated that at the first cycle, the discharge capacity (desertion) and columbic efficiency are measured 751 mAh·g-1 and 88%, respectively, at the 30th cycle, the Sn-Co-Zn alloy electrodes still delivered a discharge capacity of 510 mAh·g-1. The good lithium storage performance of the Sn-Co-Zn electrode is ascribed to multi-phase structure of the electrode.

Key words: Lithium-ion battery, Anode, Sn-Co-Zn alloy electrode, Electrodeposition, Electrochemical nucleation and growth

MSC2000: 

  • O646