Symmetric supercapacitors based on porous 3D interconnected carbon framework

dc.contributor.authorBello, Abdulhakeem
dc.contributor.authorBarzegar, Farshad
dc.contributor.authorMomodu, Damilola Y.
dc.contributor.authorDangbegnon, Julien K.
dc.contributor.authorTaghizadeh, Fatemeh
dc.contributor.authorManyala, Ncholu I.
dc.contributor.emailncholu.manyala@up.ac.zaen_ZA
dc.date.accessioned2015-02-11T09:56:35Z
dc.date.available2015-02-11T09:56:35Z
dc.date.issued2015-01
dc.description.abstractThe 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.librarianhj2015en_ZA
dc.description.sponsorshipA. 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.urihttp://www.elsevier.com/locate/electactaen_ZA
dc.identifier.citationBello, 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.issn0013-4686 (print)
dc.identifier.issn1873-3859 (online)
dc.identifier.other10.1016/j.electacta.2014.11.051
dc.identifier.urihttp://hdl.handle.net/2263/43632
dc.language.isoenen_ZA
dc.publisherElsevieren_ZA
dc.rightsCrown 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.2014.11.051en_ZA
dc.subjectGraphene foam (GF)en_ZA
dc.subjectPolyvinyl alcoholen_ZA
dc.subjectKOH activationen_ZA
dc.subjectSymmetric supercapacitoren_ZA
dc.subjectElectric double-layer capacitors (EDLCs)en_ZA
dc.titleSymmetric supercapacitors based on porous 3D interconnected carbon frameworken_ZA
dc.typePostprint Articleen_ZA

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