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电化学(中英文) ›› 1997, Vol. 3 ›› Issue (1): 86-91. 

• 研究论文 • 上一篇    下一篇

锂离子电池负极碳材料的表面改性与修饰Ⅱ.具有“核壳”结构的碳及其对电池性能的影响

马树华,国汉举,李季,梁洪泽,景遐斌,王佛松   

  1. 中国科学院长春应用化学研究所
  • 收稿日期:1997-02-28 修回日期:1997-02-28 出版日期:1997-02-28 发布日期:1997-02-28

Surface Modifications of Carbon Materials Used as Anode of Lithium Ion BatteryⅡ.The Carbon Material with Core Shell Structure and Its Positive Effect on Cell Performance of Graphite Anode

Ma Shuhua * Guo Hanju Li Ji Liang Hongze Jing Xiabin Wang Fosong   

  1. (Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
  • Received:1997-02-28 Revised:1997-02-28 Published:1997-02-28 Online:1997-02-28

摘要: 以具有气相碳化形式的精制煤焦油沉积碳为壳层材料、人造石墨(AG)及中间相石墨微球(2800℃)为核材料制备了核壳结构的碳及碳电极.核壳结构碳及核壳结构碳电极的充放电研究表明碳负极的稳定充放电容量及首次充放电效率都得到了较大的改善,循环伏安研究表明在0.7V(vsLi+/Li)左右用于形成碳电极表面钝化膜的溶剂的还原分解峰显著减小,显示了核壳结构碳材料电极对电极表面钝化膜的影响作用,X射线衍射研究揭示了石墨及石墨电极上的无定形碳壳层的存在

关键词: 锂离子电池, 碳材料, 负极, 改性与修饰

Abstract: The carbon powders and film electrode with core shell structure were prepared by carbonization in gas state with using refined coal as shell material and Artificial Graphite and Mesocarbon Microbeads (2 800 ℃) graphite as core material. Galvanostatic charge/discharge measurement showed that both steady charge/discharge capacity and first charge/discharge efficiency were improved. Cyclic voltammetry indicated that the peak at about 0.7 V vs. Li +/Li characteristic of decomposition of electrolyte got weakened, and a more compact film was formed. X ray diffraction measurement suggested the existence of amorphous carbon shell on the carbon powders and carbon film.

Key words: Lithium ion battery, Carbon material, Anode, Modification, Core shell structure

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