Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 109, Issue -, Pages 12-17Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2015.01.008
Keywords
Polymers; Nano composites; Electrical properties
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Funding
- National Natural Science Foundation of China [21174059, 21374046]
- China Postdoctoral Science Foundation [2013M530249]
- Program for Changjiang Scholars and Innovative Research Team in University
- State Key Laboratory of Supramolecular Structure and Materials [SKLSSM201416]
- Testing Foundation of Nanjing University
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Iodine doped polyaniline-reduced graphene oxide composite hydrogel was one-step synthesized using iodine as catalyst and dopant. The structure, composition and the surface morphology of the material were characterized by means of X-ray diffraction (XRD), Fourier transform infrared spectrum (FTIR), scanning electronmicroscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results showed that the reduced graphene oxide was iodine-doped and covered uniformly by the polyaniline nanoparticles doped also with iodine. The electrochemical properties of the hydrogel were evaluated by cyclic voltammetry, galvanostatic charge/discharge and the impedance spectroscope using a symmetrical two-electrode configuration. With the enhanced specific capacitance as 712.5 F g(-1) at a current density of 1 A g(-1) and a good cycling stability about 77% (from 440 to 340 F g(-1)) after 1000 charge/discharge cycles at a current density of 8 A g(-1), the composite hydrogel exhibits great potential in the application of high-performance energy storage devices. (C) 2015 Elsevier Ltd. All rights reserved.
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