期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 426, 期 1-2, 页码 432-437出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2006.08.029
关键词
Cu2Sb; SnSb; Sn/SnSb; alloy powder; electrochemical performance
Cu2Sb, SnSb and Sn/SnSb mesoscopic alloy powders were prepared by chemical reduction, respectively. The crystal structures and particle morphology of CuSb, SnSb and Sn/SnSb were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM). The electrochemical performances of the Cu2Sb, SnSb and Sn/SnSb electrodes were investigated by galvanostatic charge and discharge cycling and electrochemical impedance spectroscopy (EIS). The results showed the first charge and discharge capacities of SnSb and Sn/SnSb were higher than Cu2Sb, but after 15 cycles, the charge capacity fading rates of Cu2Sb, Sn/SnSb and Sn/SnSb were 26.16%, 55.33% and 47.39%, respectively. Cu2Sb had a better cycle performance, and Sn/SnSb multiphase alloy was prior to pure SnSb due to the existence of excessive Sn in Sn/SnSb system. (c) 2006 Elsevier B.V. All rights reserved.
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