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Acta Phys. Chim. Sin.  2014, Vol. 30 Issue (9): 1659-1666    DOI: 10.3866/PKU.WHXB201406162
ELECTROCHEMISTRY AND NEW ENERGY     
Preparation and Electrochemical Properties of Functionalized Graphene/Polyaniline Composite Electrode Materials
WANG Li-Li, XING Rui-Guang, ZHANG Bang-Wen, HOU Yuan
School of Rare Earth, Inner Mongolia University of Science & Technology, Baotou 014010, Inner Mongolia Autonomous Region, P. R. China
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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 wordsFunctionalized graphene      Polyaniline      Supercapacitor      Electrochemical property      Solvent-blending     
Received: 19 May 2014      Published: 16 June 2014
MSC2000:  O646  
Fund:  

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

Corresponding Authors: ZHANG Bang-Wen     E-mail: bangwenz@126.com
Cite this article:

WANG Li-Li, XING Rui-Guang, ZHANG Bang-Wen, HOU Yuan. Preparation and Electrochemical Properties of Functionalized Graphene/Polyaniline Composite Electrode Materials. Acta Phys. Chim. Sin., 2014, 30(9): 1659-1666.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB201406162     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2014/V30/I9/1659

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