摘要
Si doped composite material was prepared by coating artificial graphite with the mixture of phenol resin and polysilicone and following with heat treatment at 1 050 ℃ in an argon gas atmosphere. The structure and characteristics of the composite carbon were determined by means of XRD, SEM, BET surface area and electrochemical measurements. The new carbon material has a disordered carbon/graphite composite structure, with silicon doped in the disordered carbon. Compared with the pristine graphite, the electrochemical performance is improved for the Si doped composite carbon with large reversible capacity of 312.6 mAh/g, high initial charge/discharge efficiency of 88.61%, and excellent cycle stability. The prototype batteries using the composite carbon as anode material have large discharge capacity of 845 mAh and high capacity retention ratio of 95.80% at the 200th cycle.
Si doped composite material was prepared by coating artificial graphite with the mixture of phenol resin and polysilicone and following with heat treatment at 1 050 ℃ in an argon gas atmosphere. The structure and characteristics of the composite carbon were determined by means of XRD, SEM, BET surface area and electrochemical measurements. The new carbon material has a disordered carbon/graphite composite structure, with silicon doped in the disordered carbon. Compared with the pristine graphite, the electrochemical performance is improved for the Si doped composite carbon with large reversible capacity of 312.6 mAh/g, high initial charge/discharge efficiency of 88.61%, and excellent cycle stability. The prototype batteries using the composite carbon as anode material have large discharge capacity of 845 mAh and high capacity retention ratio of 95.80% at the 200th cycle.
出处
《中国有色金属学会会刊：英文版》
CSCD
2003年第5期1062-1065,共4页
Transactions of Nonferrous Metals Society of China
关键词
锂离子电池
碳
阳极
掺硅
Li ion battery
carbon
anode
Si doped
capacity
