Stability studies of polypyrole- derived carbon based symmetric supercapacitor via potentiostatic floating test

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dc.contributor.author Bello, Abdulhakeem
dc.contributor.author Barzegar, Farshad
dc.contributor.author Madito, M.J. (Moshawe)
dc.contributor.author Momodu, Damilola Y.
dc.contributor.author Khaleed, Abubakar A.
dc.contributor.author Masikhwa, T.M. (Tshifhiwa)
dc.contributor.author Dangbegnon, Julien K.
dc.contributor.author Manyala, Ncholu I.
dc.date.accessioned 2016-08-11T05:47:25Z
dc.date.issued 2016-09
dc.description.abstract This work present the synthesis and electrochemical performance of mesoporous carbon material derived from the activation and carbonisation of polypyrole (PPY). Electrochemical performance of the PPY derived carbon was investigated in a two electrode cell in a 6 M KOH alkaline electrolyte. The symmetric device was subjected to floating test (voltage holding) for ~200 h at a voltage of 1.2 V and the specific capacitance as well as the resistance of device was determined after every 10 h of floating. The device exhibited a specific capacitance of 179 F g-1 at 0.5 A g-1 and 158 F g-1 at 10 A g-1. In addition, after floating for ~120 h the resistance was constant with a very slow decrease in capacitance. Beyond ~120 h, a quick decrease in capacitance was observed with a corresponding increase in resistance, indicating a possible deterioration to the electrodes. Remarkably, at the end of floating, the specific capacitance calculated at 5 A g-1 was 120 F g-1 (~25% decay in capacitance from the initial value 160.5 F g-1 at 5 A g-1) suggesting good stability of the device over a long period of time (~8 days). en_ZA
dc.description.department Physics en_ZA
dc.description.embargo 2017-09-30
dc.description.librarian hb2016 en_ZA
dc.description.sponsorship South African Research Chairs Initiative of the Department of Science and Technology and National Research Foundation of South Africa (Grant No. 97994). en_ZA
dc.description.uri http://www.elsevier.com/locate/electacta en_ZA
dc.identifier.citation Bello, A, Barzegar, F, Madito, MJ, Momodu, DY, Khaleed, AA, Masikhwa, TM, Dangbegnon, JK & Manyala, N 2016, 'Stability studies of polypyrole- derived carbon based symmetric supercapacitor via potentiostatic floating test', Electrochimica Acta, vol. 213, pp. 107-114. en_ZA
dc.identifier.issn 0013-4686 (print)
dc.identifier.issn 1873-3859 (online)
dc.identifier.other 10.1016/j.electacta.2016.06.151
dc.identifier.uri http://hdl.handle.net/2263/56253
dc.language.iso en en_ZA
dc.publisher Elsevier en_ZA
dc.rights © 2016 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. 213, pp. 107-114, 2016. doi : 10.1016/j.electacta.2016.06.151. en_ZA
dc.subject Polypyrole en_ZA
dc.subject Activated carbon en_ZA
dc.subject Supercapacitor en_ZA
dc.subject Potentiostatic floating en_ZA
dc.subject Aqueous electrolyte en_ZA
dc.title Stability studies of polypyrole- derived carbon based symmetric supercapacitor via potentiostatic floating test en_ZA
dc.type Postprint Article en_ZA


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