物理化学学报 >> 2006, Vol. 22 >> Issue (06): 752-755.doi: 10.3866/PKU.WHXB20060621

研究简报 上一篇    下一篇

Sn-Sb合金的氢电弧等离子体法制备及其电化学性能

王忠;田文怀;李星国   

  1. 北京科技大学材料物理与化学系, 北京 100083; 北京大学化学与分子工程学院, 北京 100871
  • 收稿日期:2005-11-01 修回日期:2006-01-10 发布日期:2006-05-31
  • 通讯作者: 李星国 E-mail:xgli@pku.edu.cn

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

WANG Zhong;TIAN Wen-Huai;LI Xing-Guo   

  1. Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, P. R. China; College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
  • Received:2005-11-01 Revised:2006-01-10 Published:2006-05-31
  • Contact: LI Xing-Guo E-mail:xgli@pku.edu.cn

PDF (PC)

3580

赞

摘要： 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.

关键词: 纳米材料, 锡锑合金, 锂离子电池, 负极材料

Abstract: 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.

Key words: Nanomaterial, Sn-Sb alloy, Lihium ion battery, Anode material