Journal
RSC ADVANCES
Volume 7, Issue 54, Pages 34192-34196Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra04801g
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Funding
- Russian Foundation for Basic Research [15-08-00142-a]
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In this paper, a combination of the pseudocapacitances of both an enzymatically synthesized polyaniline/multi-walled carbon nanotube (PANI/MWCNT) composite with a core shell structure and a gel polymer redox electrolyte was used to improve the specific characteristics of a supercapacitor (SC). The gel of polyvinyl alcohol in sulfuric acid containing sodium 1,2-naphthoquinone-4-sulfonate (PVA/H2SO4/NQS) was used as a gel polymer redox electrolyte. Electrochemical studies have shown that the redox behavior of NQS is a diffusion-controlled and quasi-reversible process. The PANI/MWCNT composite in 13 mM NQS solution had a high specific capacitance of ca. 1100 F g(-1) at a scan rate of 5 mV s-1 (three electrode cell configuration). The symmetrical flexible SC device based on the PANI/MWCNT composite and the PVA/NQS gel redox electrolyte had a power density of 1.8 kW kg(-1) and an energy density of 23.3 W h kg(-1). After 3000 cycles of potential scanning, the specific capacitance of the SC device decreased by less than 7%.
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