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C 2016, 2(3), 21; doi:10.3390/c2030021

Synergetic Hybrid Aerogels of Vanadia and Graphene as Electrode Materials of Supercapacitors

1
Department of Polymer Engineering, The University of Akron, Akron, OH 44325, USA
2
Department of Polymer Science, The University of Akron, Akron, OH 44325, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Dusan Losic
Received: 7 April 2016 / Revised: 27 June 2016 / Accepted: 11 July 2016 / Published: 4 August 2016
(This article belongs to the Special Issue Graphene Aerogels)
View Full-Text   |   Download PDF [2072 KB, uploaded 4 August 2016]   |  

Abstract

The performance of synergetic hybrid aerogel materials of vanadia and graphene as electrode materials in supercapacitors was evaluated. The hybrid materials were synthesized by two methods. In Method I, premade graphene oxide (GO) hydrogel was first chemically reduced by L-ascorbic acid and then soaked in vanadium triisopropoxide solution to obtain V2O5 gel in the pores of the reduced graphene oxide (rGO) hydrogel. The gel was supercritically dried to obtain the hybrid aerogel. In Method II, vanadium triisopropoxide was hydrolyzed from a solution in water with GO particles uniformly dispersed to obtain the hybrid gel. The hybrid aerogel was obtained by supercritical drying of the gel followed by thermal reduction of GO. The electrode materials were prepared by mixing 80 wt % hybrid aerogel with 10 wt % carbon black and 10 wt % polyvinylidene fluoride. The hybrid materials in Method II showed higher capacitance due to better interactions between vanadia and graphene oxide particles and more uniform vanadia particle distribution. View Full-Text
Keywords: supercapacitors; aerogel; hybrid materials; graphene; vanadia supercapacitors; aerogel; hybrid materials; graphene; vanadia
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Fu, X.; Chen, Y.; Zhu, Y.; Jana, S.C. Synergetic Hybrid Aerogels of Vanadia and Graphene as Electrode Materials of Supercapacitors. C 2016, 2, 21.

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