A high energy density asymmetric supercapacitor utilizing a nickel phosphate/graphene foam composite as the cathode and carbonized iron cations adsorbed onto polyaniline as the anode

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dc.contributor.author Mirghni, Abdulmajid Abdallah
dc.contributor.author Madito, M.J. (Moshawe)
dc.contributor.author Oyedotun, Kabir Oyeniran
dc.contributor.author Masikhwa, T.M. (Tshifhiwa)
dc.contributor.author Ndiaye, Ndeye Maty
dc.contributor.author Ray, Sekhar. J.
dc.contributor.author Manyala, Ncholu I.
dc.date.accessioned 2018-05-25T12:34:34Z
dc.date.available 2018-05-25T12:34:34Z
dc.date.issued 2018
dc.description.abstract This work presents the effect of different contents of graphene foam (GF) on the electrochemical capacitance of nickel phosphate Ni3(PO4)2 nano-rods as an electrode material for hybrid electrochemical energy storage device applications. Pristine Ni3(PO4)2 nano-rods and Ni3(PO4)2/GF composites with different GF mass loadings of 30, 60, 90 and 120 mg were synthesised via a hydrothermal method. The electrochemical behavior of pristine Ni3(PO4)2 and Ni3(PO4)2/GF composites were analysed in a three-electrode cell configuration using 6 M KOH electrolyte. The Ni3(PO4)2/90 mg GF composite sample exhibited the highest specific capacity of 48 mA h g 1 at a current density of 0.5 A g 1. The electrochemical behavior of the Ni3(PO4)2/90 mg GF composite was further analysed in a two-electrode hybrid asymmetric device. A hybrid asymmetric device was fabricated with Ni3(PO4)2/90 mg GF as the cathode and carbonized iron cations (Fe3+) adsorbed onto polyaniline (PANI) (C-FP) as the anode material (Ni3(PO4)2/90 mg GF//C-FP) and tested in a wide potential window range of 0.0–1.6 V using 6 M KOH. This hybrid device achieved maximum energy and power densities of 49 W h kg 1 and 499 W kg 1, respectively, at 0.5 A g 1 and had long-term cycling stability. en_ZA
dc.description.department Physics en_ZA
dc.description.librarian am2018 en_ZA
dc.description.sponsorship The South African Research Chairs Initiative (SARChI) of the Department of Science and Technology and the National Research Foundation (NRF) of South Africa (Grant No. 61056). en_ZA
dc.description.uri http://www.rsc.org/journals-books-databases/about-journals/rsc-advances en_ZA
dc.identifier.citation Mirghni, A.A., Madito, M.J., Oyedotun, K.O. et al. A high energy density asymmetric supercapacitor utilizing a nickel phosphate/graphene foam composite as the cathode and carbonized iron cations adsorbed onto polyaniline as the anode. RSC Advances, 2018, 8, 11608-11621. en_ZA
dc.identifier.issn 2046-2069 (online)
dc.identifier.other 10.1039/c7ra12028a
dc.identifier.uri http://hdl.handle.net/2263/65028
dc.language.iso en en_ZA
dc.publisher Royal Society of Chemistry en_ZA
dc.rights © The Royal Society of Chemistry 2018. This article is licensed under the Creative Commons Attribution License. en_ZA
dc.subject Energy density en_ZA
dc.subject Electrochemical behavior en_ZA
dc.subject Graphene foam (GF) en_ZA
dc.subject Nickel compounds en_ZA
dc.subject Three electrode cells en_ZA
dc.subject Polyanilines (PAni) en_ZA
dc.subject Hydrothermal methods en_ZA
dc.subject High energy densities en_ZA
dc.subject Electrochemical energy storage devices en_ZA
dc.subject Electrochemical capacitance en_ZA
dc.subject Asymmetric supercapacitor en_ZA
dc.subject Supercapacitor en_ZA
dc.subject Potassium hydroxide en_ZA
dc.subject Positive ions en_ZA
dc.subject Nanorods en_ZA
dc.subject Iron en_ZA
dc.subject Foams en_ZA
dc.subject Electrolytes en_ZA
dc.subject Electrochemical electrodes en_ZA
dc.subject Cathodes en_ZA
dc.subject Anodes en_ZA
dc.title A high energy density asymmetric supercapacitor utilizing a nickel phosphate/graphene foam composite as the cathode and carbonized iron cations adsorbed onto polyaniline as the anode en_ZA
dc.type Article en_ZA


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