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Citation: XIE Jian, ZHAO Xin-Bing, YU Hong-Ming, QI Hao, CAO Gao-Shao, TU Jiang-Ping. Preparation, Characterization and Electrochemical Li-absorption/extraction Behaviors of Nanosized Co-Sn Intermetallic Compounds[J]. Acta Physico-Chimica Sinica, ;2006, 22(11): 1409-1412. doi: 10.3866/PKU.WHXB20061120 shu

Preparation, Characterization and Electrochemical Li-absorption/extraction Behaviors of Nanosized Co-Sn Intermetallic Compounds

1.
Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China

Received Date: 10 April 2006
Available Online: 6 November 2006

Three nanosized Co-Sn intermetallic compounds, namely, CoSn2, CoSn, and Co3Sn2, were prepared by solvothermal route and studied as new candidate anode materials for secondary lithium-ion batteries. The as-prepared powders were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and field emission scanning electron microscopy (FESEM). It was found that these three intermetallic compounds showed a high charge-discharge stability. However, they exhibit low electrochemical activity, especially for Co3Sn2, whose first charge capacity is only 93 mAh•g−1, because Li-ions cannot reach the interior of the crystal due to the low Li-ions diffusion rate.
- Lithium-ion batteries;Anode materials;Solvothermal method;Electrochemical performances
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