物理化学学报 >> 2002, Vol. 18 >> Issue (02): 180-182.doi: 10.3866/PKU.WHXB20020218

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二元共聚物热解碳包覆的石墨负极材料

陈继涛;周恒辉;常文保;慈云祥   

  1. 北京大学化学与分子工程学院，北京　100871
  • 收稿日期:2001-08-16 修回日期:2001-10-11 发布日期:2002-02-15
  • 通讯作者: 常文保 E-mail:dxhx@chem.pku.edu.cn

pyrolytic Carbon Coated Graphite Anode for Lithium Ion Battery

Chen Ji-Tao;Zhou Heng-Hui;Chang Wen-Bao;Ci Yun-Xiang   

  1. College of Chemistry and Molecular Engineering, Peking University,Beijing　100871
  • Received:2001-08-16 Revised:2001-10-11 Published:2002-02-15
  • Contact: Chang Wen-Bao E-mail:dxhx@chem.pku.edu.cn

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摘要： 以苯萘二元共聚物包覆天然石墨后进行热处理，用所制备的包覆石墨作为锂离子电池的负极材料，与包覆前石墨材料相比较，可逆容量提高了10％，不可逆容量降低了7％，循环性能也得到了大的改善. X射线分析表明，改性后该石墨晶体中三方石墨的含量增高.

关键词: 锂离子电池, 负极材料, 包覆天然石墨, 苯萘共聚物

Abstract: Carbon-coated natural graphite has been prepared by mixing graphite particles with benzene-naphthalene copolymer and thermaly treating the mixture under a nitrogen gas flow. The coated natural graphite showed about 10％higher reversible capacity and about 7％ lower irreversible capacity as an anode material for lithium ion battery with pristine graphite. The cycling behavior of graphite was also improved after being coated. The X-ray diffraction (XRD) results showed that the rhombohedral phase fraction of natural graphite increased after being coated.

Key words: Lithium ion battery, Anode material, Coated natural graphite,