高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

硅/石墨复合物用作锂离子电池负极材料

于海英; 谢海明; 张凌云; 颜雪冬; 杨桂玲; 王荣顺   

  1. 东北师范大学化学学院, 功能材料化学研究所, 长春 130024
  • 收稿日期:2005-07-06 修回日期:1900-01-01 出版日期:2006-07-10 发布日期:2006-07-10
  • 通讯作者: 王荣顺

Silicon/graphite Composite Anode Materials for Lithium Ion Batteries

YU Hai-Ying; XIE Hai-Ming; ZHANG Ling-Yun; YAN Xue-Dong; YANG Gui-Ling; WANG Rong-Shun*   

  1. Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
  • Received:2005-07-06 Revised:1900-01-01 Online:2006-07-10 Published:2006-07-10
  • Contact: WANG Rong-Shun

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被引次数

27

摘要： 以石墨和纳米硅粉为原料, 利用机械球磨的方法制备了硅/石墨复合物, 用作锂离子电池负极材料. 采用XRD, SEM以及电化学测试等手段对材料进行了结构表征和性能测试. 通过球磨不同质量比的硅和石墨, 并对相应的复合物进行充放电测试, 寻找到了硅和石墨的最佳比例, 其值为1∶9. 实验结果表明, 所得材料既具备高于纯纳米硅的循环性能, 又具有比石墨高的可逆容量.

关键词: 锂离子电池, 硅, 石墨, 复合物

Abstract: A silicon-graphite composite was studied as a means of preparation of silicon-based anode material for lithium ion batteries. The composite was obtained by milling the mixture of nano-silicon powder and fine graphite particle with different mass ratios of silicon to graphite. The crystal structure and the electrochemical performance were characterized by XRD, SEM and electrochemical performance testing. The mass ratio of silicon to graphite, 1:9, was found through the charge-discharge measurement. Studied results demonstrate that this obtained material shows better cycling performance than pure nano-silicon and higher reversible capacity than graphite.

Key words: Lithium ion battery, Silicon, Graphite, Composite

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