Acta Chimica Sinica ›› 2014, Vol. 72 ›› Issue (8): 927-934.DOI: 10.6023/A14040286 Previous Articles     Next Articles



马占玲a, 宋艳芳b, 夏永姚b, 何军坡a   

  1. a 聚合物分子工程国家重点实验室 复旦大学高分子科学系 上海 200433;
    b 上海市分子催化和功能材料重点实验室 复旦大学化学系 上海 200433
  • 投稿日期:2014-04-16 发布日期:2014-05-30
  • 通讯作者: 何军坡
  • 基金资助:
    项目受国家科技部“973”,“863”基金(Nos. 2008AA032102,2011CB605701)资助.

Preparation and Capacitance of Copper-Doped Activated Carbon From Polyacrylonitrile (PAN) Precursor

Ma Zhanlinga, Song Yanfangb, Xia Yongyaob, He Junpoa   

  1. a State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433;
    b Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433
  • Received:2014-04-16 Published:2014-05-30
  • Supported by:
    Project supported by the Ministry of Science and Technology of China (Nos. 2008AA032102, 2011CB605701).

Polyacrylonitrile (PAN) is a widely used precursor for activated carbon using KOH as the activation agent. In the present work, we prepared activated carbon with high BET surface (2241 m2/g) by optimizing the activation temperature and the dosage of KOH. On this basis, we obtained PAN-based activated carbon doped with copper. The preparation is through a three-step process: (1) the nucleophilic reaction between nitrile groups and hydroxylamine (NH2OH), introducing multi amino and oximido groups in PAN; (2) complexation of Cu2+ with oximido groups on modified PAN, resulting in a dark green colored complex; (3) carbonization of the complex in the presence of KOH at high temperature. The present method of doping-in-precursor may provides more homogeneous blending of metal in carbon matrix than simple mixing of activated carbon and copper. The copper-doped activated carbon was characterized by XPS, FT-IR and SEM. The doped copper undergoes the Faradic reactions to produce pseudo-capacitance, thus improving the specific capacitance of activated carbon electrodes from 208.3 F/g to 289.7 F/g (0.5 A/g). Nevertheless, the cycle stability of copper-doped activated carbon was lower than that of pure activated carbon after several recharge cycles. This was probably caused by the irreversible Faradic reaction of doped copper.

Key words: polyacrylonitrile, chemical complexation method, copper-doping, activated carbon