Symmetric supercapacitors based on porous 3D interconnected carbon framework

Show simple item record Bello, Abdulhakeem Barzegar, Farshad Momodu, Damilola Y. Dangbegnon, Julien K. Taghizadeh, Fatemeh Manyala, Ncholu I. 2015-02-11T09:56:35Z 2015-02-11T09:56:35Z 2015-01
dc.description.abstract The construction and design of novel porous carbons for electric double-layer capacitors (EDLCs) application to meet the increasing demand and supply of energy is eminent. This is important because the pore volume (PV)/micropore volume (MV) in the porous network architecture of the carbon is mostly responsible for the ion traps in energy storage. Three dimensional carbon materials based on graphene materials with relatively high specific surface area (SSA) represents a promising material candidate for EDLCs applications. In this work, we synthesized highly porous carbon from graphene foam (GF) and polyvinyl alcohol PVA as a sacrificial template, and investigate their performance as electrodes for EDLCs applications. The as-produced carbons present a fairly large surface area (502 m2 g−1), and a highly porous interconnected framework with mesopore walls and micropore texture which are suitable as electrode for energy storage. As electrode material in a symmetric configuration the activated graphene foam (AGF) showed a specific capacitance of 65 F g−1, energy density of 12 Wh kg−1, power density of 0.4 kW kg−1, good rate performance and excellent long term stability in 1 M Na2SO4 aqueous with no capacitance loss after 3000 cycles. en_ZA
dc.description.librarian hj2015 en_ZA
dc.description.sponsorship A. Bello acknowledges University of Pretoria and NRF financial support for his Postdoc fellowship, while D. Y. Momodu and F. Barzegar acknowledge financial support from University of Pretoria and the NRF for PhD bursaries. en_ZA
dc.description.uri en_ZA
dc.identifier.citation Bello, A, Barzegar, F, Momodu, D, Dangbegnon, J, Taghizadeh, F & Manyala, N 2015, 'Symmetric supercapacitors based on porous 3D interconnected carbon framework', Electrochimica Acta, vol. 151, pp. 386-392. en_ZA
dc.identifier.issn 0013-4686 (print)
dc.identifier.issn 1873-3859 (online)
dc.identifier.other 10.1016/j.electacta.2014.11.051
dc.language.iso en en_ZA
dc.publisher Elsevier en_ZA
dc.rights Crown Copyright © 2014 Published by Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Electrochimica Acta. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Electrochimica Acta, vol. 151, pp. 386-392, 2015. doi : 10.1016/j.electacta.2014.11.051 en_ZA
dc.subject Graphene foam (GF) en_ZA
dc.subject Polyvinyl alcohol en_ZA
dc.subject KOH activation en_ZA
dc.subject Symmetric supercapacitor en_ZA
dc.subject Electric double-layer capacitors (EDLCs) en_ZA
dc.title Symmetric supercapacitors based on porous 3D interconnected carbon framework en_ZA
dc.type Postprint Article en_ZA

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