Synthesis and characterization of porous carbon derived from activated banana peels with hierarchical porosity for improved electrochemical performance

Show simple item record

dc.contributor.author Fasakin, Oladepo
dc.contributor.author Dangbegnon, Julien K.
dc.contributor.author Momodu, Damilola Y.
dc.contributor.author Madito, M.J. (Moshawe)
dc.contributor.author Oyedotun, Kabir O.
dc.contributor.author Eleruja, M.A.
dc.contributor.author Manyala, Ncholu I.
dc.date.accessioned 2018-04-25T05:53:28Z
dc.date.issued 2018-02
dc.description.abstract Banana peels, a common fruit waste was adopted as a material precursor in this study to synthesize highly porous activated carbon from banana peels (ABP) which serves as an electrode material for a symmetric supercapacitor device. The activation was done using KOH pellets at different carbonization temperatures ranging from 750 °C to 950 °C. The ABP sample obtained from the 900 °C carbonization temperature (ABP900) exhibited unique material properties such as hierarchical porous nano-architecture containing micropores, and mesopores with the highest specific surface area (1362 m2 g−1). Electrochemical performance investigation in different neutral aqueous electrolytes showed that the best response was obtained in NaNO3 for the ABP900 electrode. The symmetric device subsequently assembled using 1 M NaNO3 operated in a potential window of 1.8 V, exhibited a specific capacitance of 165 F g−1 with a corresponding energy density of 18.6 W h kg−1 at 0.5 A g−1. A 100% capacitance retention and columbic efficiency were obtained after 10000 continuous charge-discharge cycles at 5 A g−1. Remarkably, after subjecting the symmetric device to a voltage holding test for 60 h, the specific capacitance was observed to increase from 165 F g−1 to 328 F g−1 with a corresponding increased energy density to about 36.9 W h kg−1 at 0.5 A g−1, suggesting a 98% increase in device energy density from its initial value after voltage holding. Thus, the results reported showcase the ABP900 material as a potential nanostructured porous material useful in the design of high-performance electrodes for stable electrochemical capacitors. en_ZA
dc.description.department Physics en_ZA
dc.description.embargo 2019-02-01
dc.description.librarian hj2018 en_ZA
dc.description.sponsorship The South African Research Chairs Initiative (SARChI) of the Department of Science and Technology, the National Research Foundation (NRF) of South Africa (Grant No. 61056). en_ZA
dc.description.uri http://www.elsevier.com/locate/electacta en_ZA
dc.identifier.citation Fasakin, O., Dangbegnon, J.K., Momodu, D.Y. et al. 2018, 'Synthesis and characterization of porous carbon derived from activated banana peels with hierarchical porosity for improved electrochemical performance', Electrochimica Acta, vol. 262, pp. 187-196. en_ZA
dc.identifier.issn 0013-4686 (print)
dc.identifier.issn 1873-3859 (online)
dc.identifier.other 10.1016/j.electacta.2018.01.028
dc.identifier.uri http://hdl.handle.net/2263/64713
dc.language.iso en en_ZA
dc.publisher Elsevier en_ZA
dc.rights © 2018 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. A definitive version was subsequently published in Electrochimica Acta, vol. 262, pp. 187-196, 2018. doi : 10.1016/j.electacta.2018.01.028. en_ZA
dc.subject Activated banana peel (ABP) en_ZA
dc.subject Electrodes en_ZA
dc.subject High energy density en_ZA
dc.subject Raman spectra en_ZA
dc.subject Electrolytes en_ZA
dc.subject Capacitors en_ZA
dc.subject Supercapacitors (SCs) en_ZA
dc.subject Electrochemical capacitors (ECs) en_ZA
dc.subject Rice husk en_ZA
dc.subject Hydrated ions en_ZA
dc.title Synthesis and characterization of porous carbon derived from activated banana peels with hierarchical porosity for improved electrochemical performance en_ZA
dc.type Postprint Article en_ZA


Files in this item

This item appears in the following Collection(s)

Show simple item record