Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (9): 1659-1666.doi: 10.3866/PKU.WHXB201406162

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Preparation and Electrochemical Properties of Functionalized Graphene/Polyaniline Composite Electrode Materials

WANG Li-Li, XING Rui-Guang, ZHANG Bang-Wen, HOU Yuan   

  1. School of Rare Earth, Inner Mongolia University of Science & Technology, Baotou 014010, Inner Mongolia Autonomous Region, P. R. China
  • Received:2014-05-19 Revised:2014-06-16 Published:2014-08-29
  • Contact: ZHANG Bang-Wen E-mail:bangwenz@126.com
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (51164026), Inner Mongolia University of Science and Technology Innovation Fund, China (2012NCL007).

Abstract:

Octadecylamine functionalized graphene (ODA-G) was synthesized by the grafting of graphene oxide (GO) with ODA followed by reduction with hydrazine hydrate. Subsequently, ODA-G/polyaniline (PANI) composites were prepared using a facile solvent-blending procedure. ODA-G and ODA-G/PANI composites were characterized by Fourier transform infrared spectrometry (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), Raman spectroscopy, and transmission electron microscopy (TEM). The electrochemical properties of the composites were measured based on cyclic voltammetry (CV), galvanostatic charge/discharge, and ac impedance spectroscopy. The results show that ODA-G as a support material provides additional electron transfer paths, as well as active sites, for the electrochemical redox reaction of PANI, which helps to increase its pseudocapacitance. A specific capacitance of 782 F·g-1 is obtained for 2%(w)ODA-G/PANI at a current density of 1.0 A·g-1, compared with 426 F·g-1 for PANI. Furthermore, ODA-G/PANI exhibits better stability than PANI.

Key words: Functionalized graphene, Polyaniline, Supercapacitor, Electrochemical property, Solvent-blending

MSC2000: 

  • O646