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1 Materials Science Poland

1 2009

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A new composite, Co-Sn metal oxide anode for lithium ion batteries

Huang F., Lu X. Z., Zhang Y. F., Luo X. Y., Yu C., Wu R.

Materials Science Poland

2009

Vol. 27, No. 1

239--248

The structural and morphological evolution of cobalt-tin (Co-Sn) metal composite oxides, synthesized by the decomposition of CoSn(OH)6 precursor at various temperatures, were investigated by X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM). The precursor was also studied by thermal analysis (TG/DTA). The electrochemical performance of nanosized Co-Sn composite metal oxides was investigated to evaluate their suitability for use as anode materials for Li ion batteries. The results revealed that the samples heat-treated at low temperatures consisted of amorphous CoSnO3, and the samples heat-treated at high temperatures comprised crystalline Co2SnO4 and SnO2. The charge capacity and cyclability were sensitive to the structure and composition of the electrode active materials. The samples heat-treated in the phase transition temperature range exhibited relatively worse electrochemical properties.