期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 17, 期 8, 页码 2203-2212出版社
SPRINGER
DOI: 10.1007/s10008-013-2085-4
关键词
Nanocomposite material; Conducting polymer; Electrochemical properties; Electrochemical supercapacitor
资金
- Research Council of K.N. Toosi University of Technology
- Iran National Science Foundation (INSF)
Reduced graphene oxide was synthesized by simple chemical processing of graphite. Electron microscopy investigations of synthesized graphene showed slightly folded transparent sheets with a few square micrometers dimension. Poly(ortho-phenylenediamine)/graphene/Pt electrode was electrochemically fabricated in a 2.0-M H2SO4 solution by means of multiple potential cycling. Due to the catalytic effect of graphene on the oxidative electropolymerization of ortho-phenylenediamine, the ortho-phenylenediamine/graphene (PoPD/GR) nanocomposite showed greatly enhanced electrical properties and excellent capacitive behavior. Electrochemical impedance spectroscopy, galvanostatic charge/discharge curves, and voltammetric investigations revealed that PoPD/GR nanocomposite represented good capacitive behavior with a specific capacitance as high as 308.3 F g(-1) at 0.1 A g(-1). It is almost three times higher than that of pure graphene (111.7 F g(-1)). In addition, the nanocomposite electrode retained more than 99 % of the initial capacity after 1,500 cycles at a current density of 1 A g(-1).
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