Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (06): 812-816.DOI: 10.6023/A1106153 Previous Articles    

Full Papers


孟祥德a,b, 张俊红a, 王妍妍b, 刘海a   

  1. a 天津大学内燃机燃烧学国家重点实验室 天津 300072;
    b 军事交通学院 天津 300161
  • 投稿日期:2011-06-15 修回日期:2011-11-21 发布日期:2011-11-29
  • 通讯作者: 孟祥德

Modification of Nature Graphite Anode

Meng Xiangdea,b, Zhang Junhonga, Wang Yanyanb, Liu Haia   

  1. a State Key Laboratory of Engines, Tianjin University, Tianjin 300072;
    b Military Transportation University, Tianjin 300161
  • Received:2011-06-15 Revised:2011-11-21 Published:2011-11-29

Nature graphite, as anode in rechargeable lithium ion battery, has been attracting widely attention. In this paper, aiming to the disadvantage effect of volume and surface active group on the electrochemical performance of nature graphite anode, graphite intercalation compound and expanded graphite were prepared via bromination and calcination to obtain advanced high rate performance and cycle life. The structural characteristics of samples were measured by XRD (X-ray diffraction), SEM (scanning electron microscope) and BET (Brunauer, Emmett and Taylor) techniques. The results show separation of graphitic layers and a larger diameter size of graphitic grain. Constant current charging-discharging and cyclic voltammetry were carried out, indicating the improved high rate performance and cyclic stability of the modified graphite.

Key words: nature graphite, anode, modification, bromination