Effect of the synthesis method of SnSb anode materials on their electrochemical properties

Chaoli Yin, Hailei Zhao, Hong Guo, Xianliang Huang, and Weihua Qiu Department of Inorganic Nonmetallic Materials, University of Science and Technology Beijing, Beijing 100083, China

摘 要：SnSb alloy powders for the anode of Li-ion batteries were synthesized by two kinds of reduction precipitation methods: solution titration and rapid mixing. Two kinds of SnSb alloy powders showed different phase compositions and particle morpholo-gies although the same starting materials were used. The SnSb alloy electrode synthesized by titration exhibits high reversible spe-cific capacity and good cycling stability, whereas the rapid-mixing sample shows high irreversible capacity and fast capacity fade. The broad particle size distribution of SnSb powders synthesized by titration is considered to be responsible for the improvement of cycling stability. The initial charge-discharge efficiency exceeding 80/ has been obtained for the titration sample. The electro-chemical reaction process of two kinds of synthesized SnSb composite electrodes was characterized by cyclic voltammetry and AC impedance techniques.

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