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研究论文

BaFeSi/C复合物作为锂离子电池负极材料的研究

  • 冯瑞香 ,
  • 董华 ,
  • 艾新平 ,
  • 杨汉西
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  • 武汉大学化学学院,武汉大学化学学院,武汉大学化学学院,武汉大学化学学院 湖北武汉430072 ,湖北武汉430072 ,湖北武汉430072 ,湖北武汉430072

收稿日期: 2004-11-28

  修回日期: 2004-11-28

  网络出版日期: 2004-11-28

The Investigation of BaFeSi/C Alloy Composite as Anode Materials for Li-ion Battery

  • FENG Rui-xiang ,
  • DONG Hua ,
  • AI Xin-ping~ ,
  • YANG Han-xi
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  • (Department of Chemistry, Wuhan University, Wuhan 430072, China

Received date: 2004-11-28

  Revised date: 2004-11-28

  Online published: 2004-11-28

摘要

采用机械球磨法制备BaFeSi/C复合物,并考察了其作为锂离子电池负极材料的电化学性能.结果表明,这种复合材料具有较高的初始放电容量、合适的充放电平台和良好的循环可逆性.XRD和XPS研究证明:BaFeSi/C复合物循环性能的提高主要源于惰性导电组分FeSi2、BaSi2和外层石墨骨架的协同作用,它们的存在不仅有效地缓冲了活性组分硅的体积变化,同时在很大程度上增强了复合材料的电子导电性和离子导电性.

本文引用格式

冯瑞香 , 董华 , 艾新平 , 杨汉西 . BaFeSi/C复合物作为锂离子电池负极材料的研究[J]. 电化学, 2004 , 10(4) : 391 -396 . DOI: 10.61558/2993-074X.1591

Abstract

A novel BaFeSi/C composite was prepared by mechanical ball milling, and lithium insertion reactions on the composite electrode were investigated by cyclic voltammetry ,charge-discharge measurements, XRD and XPS spectroscopy. It is demonstrated that the capacity retention with indiscernible capacity decas during charge-discharge cycling. The improved cycling ability of the composite is suggested from a cooperative action by inactive FeSi_(2 )and BaSi_2 matrix and outer graphite shell, which both buffer the volumetric changes of the active Si phase and provide a good connection for electronic and ionic conduction during lithium insertion and extraction processes.
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