Sn-Sb合金的氢电弧等离子体法制备及其电化学性能

采用氢电弧等离子体方法成功地合成了锡锑合金纳米颗粒, 通过TEM、XRD、恒电流充放电测试等手段研究了其形态、结构及电化学行为. 结果表明: 锡锑合金纳米颗粒为球形形貌, 颗粒平均直径为138 nm, 由Sn和SnSb两相组成；经电化学性能测试, 该锡锑纳米颗粒首次嵌锂容量高达930 mAh•g−1, 可逆容量为701 mAh•g−1, 20次循环后容量仍为566 mAh•g−1, 容量保持率为81％. 用氢电弧等离子体方法制备的Sn-Sb合金纳米材料是有希望的锂离子电池负极材料.

Synthesis and Electrochemical Properties of Sn-Sb Alloy Prepared by Hydrogen Plasma-metal Reaction

Sn-Sb alloy nanoparticles were prepared by hydrogen plasma-metal reaction. The morphology, crystal structure, and electrochemical action of the nanoparticles were investigated by transmission electron microscopy (TEM), X-ray diffraction (XRD), and galvanostatic cycling tests. The results show that the particles are spherical in shape, with average particle diameter of 138 nm, and composed of Sn and SnSb phases. Electrochemical cycling tests of model cells show that the specific capacity is far more than that of carbon materials. The lithiation capacity and delithiation capacity in the first cycle reached 930 mAh•g−1 and 701 mAh•g−1, respectively, and it has a good cycling stability. The capacity retention at the 20th cycle is 81%, and the reversible specific capacity is 566 mAh•g−1. The Sn-Sb alloy nanomaterial prepared by hydrogen plasma-metal reaction can be considered as candidate for the anode materials of lithium ion battery.