Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (02): 291-298.doi: 10.3866/PKU.WHXB20100227

• ELECTROCHEMISTRY • Previous Articles     Next Articles

Copolymerization and Capacitive Performance of Composite Carbon Nanotubes/Polyaniline/Nickel Hexacyanoferrate Films

ZANG Yang, HAO Xiao-Gang, WANG Zhong-De, ZHANG Zhong-Lin, LIU Shi-Bin   

  1. College of Chemistry &Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
  • Received:2009-08-31 Revised:2009-11-28 Published:2010-01-26
  • Contact: HAO Xiao-Gang E-mail:xghao@tyut.edu.cn

Abstract:

Electroactive composite films of carbon nanotubes/polyaniline/nickel hexacyanoferrate (CNTs/PANI/NiHCF) were synthesized on platinum substrates modified with CNTs by a one-step co-polymerization using cyclic voltammetry. The composite films were characterized by Fourier transforminfrared spectroscopy (FT-IR), energy dispersive X-ray spectroscopy (EDS), and scanning electron microscopy (SEM). Cyclic voltammetry (CV), galvanostatic charge/discharge, and electrochemical impedance spectroscope (EIS) methods were used to study the cycling stability and the electrochemical capacitive performance of the CNTs/PANI/NiHCF films. Results showed that three-dimensional porous network composite films with uniform distributions of PANI and NiHCF nanoparticles on the CNTs were formed by this new method. The specific capacitance of the inorganic-organic hybrid films were 262.28 F·g-1 with a specific energy of 29.51 Wh·kg-1 at a current density of 2 mA·cm-2. The specific power was 10228.61 W·kg-1 at a current density of 10 mA·cm-2. Meanwhile, CNTs/PANI/NiHCF films showed a capacity decay of only 19.92% after 2000 charge/discharge cycles and had a coulombic efficiency of over 99%. Therefore, the composite films exhibit outstanding power performance, fast dynamics of charge transport and are excellent materials for use in supercapacitors.

Key words: Supercapacitor, Polyaniline, Nickel hexacyanoferrate, Carbon nanotube, Composite film, Electrochemical co-polymerization, Capacitive performance

MSC2000: 

  • O646