Investigation of different aqueous electrolytes on the electrochemical performance of activated carbon-based supercapacitors

dc.contributor.authorBarzegar, Farshad
dc.contributor.authorMomodu, Damilola Y.
dc.contributor.authorFashedemi, Omobosede O.
dc.contributor.authorBello, Abdulhakeem
dc.contributor.authorDangbegnon, Julien K.
dc.contributor.authorManyala, Ncholu I.
dc.contributor.emailncholu.manyala@up.ac.zaen_ZA
dc.date.accessioned2017-09-21T06:04:13Z
dc.date.available2017-09-21T06:04:13Z
dc.date.issued2015-12
dc.description.abstractIn this study, porous activated carbons (AC) were synthesized by an environmentally friendly technique involving chemical activation and carbonization, with an in-depth experimental study carried out to understand the electrochemical behaviour in different aqueous electrolytes (KOH, LiCl, and Na2SO4). The electrochemical performance of the AC electrode was evaluated by different techniques such as cyclic voltammetry, galvanostatic charge/discharge and impedance spectroscopy. The results obtained demonstrate that the AC materials in different electrolytes exhibit unique double layer properties. In particular, the AC electrode tested in 6 M KOH showed the best electrochemical performance in terms of specific capacitance and efficiency. A specific capacitance of 129 F g 1 was obtained at 0.5 A g 1 with a corresponding solution resistance of 0.66 U in an operating voltage window of 0.8 V, with an efficiency of 100% at different current densities.en_ZA
dc.description.departmentChemistryen_ZA
dc.description.departmentPhysicsen_ZA
dc.description.librarianam2017en_ZA
dc.description.sponsorshipThe South African Research Chairs Initiative of the Department of Science and Technology and National Research Foundation of South Africa (Grant No. 97994). F. Barzegar and D. Y. Momodu acknowledge financial support from the University of Pretoria and the NRF while A. Bello acknowledge the University of Pretoria's financial support for their postdoctoral fellowships.en_ZA
dc.description.urihttp://www.rsc.org/advancesen_ZA
dc.identifier.citationBarzegar, F., Momodu, D.Y., Fashedemi, O.O., Bello, A., Dangbegnon, J.K. & Manyala, N.I. Investigation of different aqueous electrolytes on the electrochemical performance of activated carbon-based supercapacitors. RSC Advance, 2015, 5, 107482-107487.en_ZA
dc.identifier.issn2046-2069 (online)
dc.identifier.other10.1039/c5ra21962k
dc.identifier.urihttp://hdl.handle.net/2263/62482
dc.language.isoenen_ZA
dc.publisherRoyal Society of Chemistryen_ZA
dc.rights© The Royal Society of Chemistry 2015en_ZA
dc.subjectElectrolytesen_ZA
dc.subjectCapacitanceen_ZA
dc.subjectElectrochemical performanceen_ZA
dc.subjectActivated carbons (AC)en_ZA
dc.titleInvestigation of different aqueous electrolytes on the electrochemical performance of activated carbon-based supercapacitorsen_ZA
dc.typeArticleen_ZA

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