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

被引:12
作者
Wang Li-Li [1 ]
Xing Rui-Guang [1 ]
Zhang Bang-Wen [1 ]
Hou Yuan [1 ]
机构
[1] Inner Mongolia Univ Sci & Technol, Sch Rare Earth, Baotou 014010, Inner Mongolia, Peoples R China
基金
中国国家自然科学基金;
关键词
Functionalized graphene; Polyaniline; Supercapacitor; Electrochemical property; Solvent-blending; GRAPHENE; PERFORMANCE; GRAPHITE; ELECTROPOLYMERIZATION;
D O I
10.3866/PKU.WHXB201406162
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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.
引用
收藏
页码:1659 / 1666
页数:8
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