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›› 2008, Vol. 8 ›› Issue (5): 993-997.

• 材料工程专栏 • 上一篇    下一篇

锂离子电池负极用Sb-活性炭复合材料的制备及其性能表征

李艳红 吴锋 吴川 白莹   

  1. 北京理工大学化工与环境学院 北京理工大学化工与环境学院 北京理工大学化工与环境学院
  • 收稿日期:2008-05-27 修回日期:2008-07-18 出版日期:2008-10-20 发布日期:2008-10-20
  • 通讯作者: 李艳红

Preparation and Characterization of Sb-Active Carbon Composite as Negative Electrode for Li-ion Batteries

LI Yan-hong WU Feng WU Chuan BAI Ying   

  1. School of Mechanical and Power Energy Eng.，Shanghai Jiaotong University School of Chemical Engineering & Environment, Beijing Institute of Technology School of Mechanical and Power Energy Eng.，Shanghai Jiaotong University
  • Received:2008-05-27 Revised:2008-07-18 Online:2008-10-20 Published:2008-10-20
  • Contact: LI Yan-hong

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被引次数

66

摘要： 以Sb2O3和活性炭为原料，采用碳热还原法制备Sb-活性炭复合材料. 通过XRD及SEM、恒流充放电循环、慢速扫描循环伏安等方法对其结构形貌和电化学嵌脱锂性能进行了研究. 结果表明，Sb2O3碳热还原成金属Sb，还原剂比例越大，得到的Sb金属颗粒越小，材料颗粒分布越均匀. 在原料摩尔比Sb2O3:C(活性炭)=1:4条件下，产物的性能最优，首次放电比容量为893 mA×h/g，循环8次后，充电比容量为548 mA×h/g，比容量保持率为88%.

关键词: 锂离子电池, 负极材料, 碳热还原, Sb-碳复合材料

Abstract: Sb-active carbon composite was prepared by carbothermal reduction from Sb2O3 and active carbon. The so-prepared material was characterized by XRD and SEM. Electrochemical lithium insertion/extraction characteristics of the material were determined by constant current charge-discharge and cyclic voltammetry methods. The results show that Sb2O3 is reduced to metallic Sb. More homogeneous composite can be obtained by increasing the molar ratio of reductant in raw materials. The Sb-active carbon composite heated for 12 h with a molar ratio of Sb2O3:C 1:4 exhibits the best electrochemical lithium insertion/extraction characteristics and possesses the initial lithium specific insertion capacity of 893 mA×h/g. Even after 8 cycles, Sb-active carbon composite still shows high lithium specific extraction capacity as 548 mA×h/g, which is 88% of initial lithium specific extraction capacity.

Key words: Li-ion battery, anode material, carbothermal reduction, Sb-C composite

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