Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (02): 373-380.doi: 10.3866/PKU.WHXB201112021

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Electropolymerization and Characterization of Fast Charge-Discharge PPy/F-SWNTs Composite Materials

ZHU Jian-Bo1,2, XU You-Long1,2, WANG Jie1,2, WANG Jing-Ping1,2   

  1. 1. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education, Xi'an Jiaotong University, Xi'an 71004 9. P.R. China;
    2. International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an 71004 9. P.R. China
  • Received:2011-09-26 Revised:2011-11-21 Published:2012-01-11
  • Contact: XU You-Long
  • Supported by:

    The project was supported by the National High-Tech Research and Development Program of China (863) (2007AA03Z249) and National Natural Science Foundation of China (20804030).

Abstract: Fast charge-discharge composite materials of conducting polypyrrole and functionalized single-walled carbon nanotubes doped with p-toluenesulfonate (PPy-TOS/F-SWNTs) were prepared by galvanostatic electrochemical polymerization. Scanning Electron Microscope (SEM) images showed that the composite had a nano-rod structure with a diameter of about 70 nm. Nitrogen adsorption-desorption experinents were used to characterize the specific surface area (BET) (up to 12.64 m2·g-1) and pore sizes of the composite. Electrochemical properties of the composites were studied by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge-discharge (GC) measurements. The specific capacitance of this composite is about 211 F·g-1 (energy density: 18.7 Wh·kg-1) at a current density of 2.5 A·g-1, and 141.8 F·g-1 (energy density: 12.6 Wh·kg-1) at large current density of 80 A·g-1. The composite had excellent cyclability with a capacity retention of about 95.2% after 10000 cycles at a current density of 10 A·g-1. All these results indicate that this new composite material has a very rapidly charge-discharge ability

Key words: Supercapacitor, Electropolymerization, Polypyrrole, SWNTs