Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (06): 1515-1520.doi: 10.3866/PKU.WHXB20100603

• ELECTROCHEMISTRY • Previous Articles     Next Articles

Novel Polypyrrole/Mesoporous Carbon Nanocomposite Electrode for an Electrochemical Hybrid Capacitor

ZHANG Jing, KONG Ling-Bin, CAI Jian-Jun, YANG Zhen-Sheng, LUO Yong-Chun, KANG Long   

  1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, P. R. China; School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, P. R. China
  • Received:2010-01-01 Revised:2010-02-21 Published:2010-05-28
  • Contact: KONG Ling-Bin E-mail:konglb@lut.cn

Abstract:

With mesoporous carbon (CMK-3) serving as a support, we prepared a novel nanocomposite of polypyrrole/mesoporous carbon (PPy-CMK-3) by an in situ chemical polymerization method. An electrochemical hybrid capacitor was successfully designed using a PPy-CMK-3 composite and CMK-3 as positive and negative electrodes, respectively. The electrochemical capacitance performance of this kind of hybrid capacitor was investigated in 1.0 mol·L-1 NaNO3 electrolyte solution. The discharge capacity of the hybrid capacitor reached 57 F·g-1 under a current density of 5.0 mA·cm-2 and cell voltage of 1.4 V. The energy density of the hybrid capacitor reached 17 Wh·kg-1 with a power density of 2.5×102 W·kg-1. When the current density was increased from 5.0 to 50 mA·cm-2, the capacity of the hybrid capacitor remained at about 80% and it showed excellent high rate charge-discharge performance. Furthermore, the PPy-CMK-3/CMK-3 hybrid capacitor containing this PPy-CMK-3 nanocomposite could be active easily and it possessed a high charge-discharge efficiency and good cycle performance.

Key words: Mesoporous carbon, Polypyrrole, Electrochemical hybrid capacitor, Energy density

MSC2000: 

  • O646