In situ electrochemical polymerization of a nanorod-PANI-Graphene composite in a reverse micelle electrolyte and its application in a supercapacitor.
Highly porous nanorod-PANI-Graphene composite films were prepared by in situ electrochemical polymerization onto an ITO substrate in a reverse micelle electrolyte. The morphology and microstructure of the composite films were analyzed by using a field emission scanning electron microscope. It was observed that the films were highly porous and the nanorod PANI films were inserted by graphene nanosheets. This indicated that a good conductive network between PANI nanorods and graphene sheets was formed. Further electrochemical tests involved cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) in 1 mol L(-1) HClO(4) solution. The results showed that the composite film had a favorable capacitance with a high electron transfer rate and low resistance. The highest specific capacitance that could be achieved was as high as 878.57 F g(-1) with the charge loading of 500 mC at a current density of 1 A g(-1). The GCD at different charge loadings showed good cycle stability with a low fading rate of specific capacitance after 1000 cycles. The results demonstrated that the nanorod-PANI-Graphene composite was proved to be of great potential as an electrode material for supercapacitors.
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, P.R. China.
Liwen
L
Hu
Jiguo
J
Tu
Shuqiang
S
Jiao
Jungang
J
Hou
Hongmin
H
Zhu
Derek J
DJ
Fray
D055664:Electrochemical Techniques; D004573:Electrolytes / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D008823:Micelles; D043942:Nanotubes / Q000737:chemistry*; D010316:Particle Size; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D013499:Surface Properties
D004573:Electrolytes; D008823:Micelles; D011108:Polymers; D006108:Graphite