Chemical adsorption of NiO nanostructures on nickel foam-graphene for supercapacitor applications

dc.contributor.authorBello, Abdulhakeem
dc.contributor.authorMakgopa, Katlego
dc.contributor.authorFabiane, Mopeli
dc.contributor.authorDodoo-Arhin, David
dc.contributor.authorOzoemena, Kenneth I.
dc.contributor.authorManyala, Ncholu I.
dc.contributor.emailncholu.manyala@up.ac.zaen_US
dc.date.accessioned2014-10-09T06:02:38Z
dc.date.available2014-10-09T06:02:38Z
dc.date.issued2013-10
dc.description.abstractFew-layer graphene was synthesized on a nickel foam template by chemical vapor deposition. The resulting three-dimensional (3D) graphene was loaded with nickel oxide nanostructures using the successive ionic layer adsorption and reaction technique. The composites were characterized and investigated as electrode material for supercapacitors. Raman spectroscopy measurements on the sample revealed that the 3D graphene consisted of mostly few layers, while X-ray diffractometry and scanning electron microscopy revealed the presence of nickel oxide. The electrochemical properties were investigated using cyclic voltammetry, electrochemical impedance spectroscopy, and potentiostatic charge–discharge in aqueous KOH electrolyte. The novelty of this study is the use of the 3D porous cell structure of the nickel foam which allows for the growth of highly conductive graphene and subsequently provides support for uniform adsorption of the NiO onto the graphene. The NF-G/NiO electrode material showed excellent properties as a pseudocapacitive device with a high-specific capacitance value of 783 F g-1 at a scan rate of 2 mV s-1. The device also exhibited excellent cycle stability, with 84 % retention of the initial capacitance after 1000 cycles. The results demonstrate that composites made using 3D graphene are versatile and show considerable promise as electrode materials for supercapacitor applications.en_US
dc.description.librarianhb2014en_US
dc.description.sponsorshipSouth African Research Chairs Initiative of the Department of Science and Technology (SARChI-DST) and the National Research Foundation (NRF). University of Pretoria.en_US
dc.description.urihttp://link.springer.com/journal/11665en_US
dc.identifier.citationBello, A, Makgopa, K, Fabiane, M, Dodoo-Ahrin, D, Ozoemena, KL & Manyala, N 2014, 'Chemical adsorption of NiO nanostructures on nickel foam-graphene for supercapacitor applications', Journal of Materials Science, vol. 48, no. 19, pp. 6707-6712.en_US
dc.identifier.issn0022-2461 (print)
dc.identifier.issn1573-4803 (online)
dc.identifier.other10.1007/s10853-013-7471-x
dc.identifier.urihttp://hdl.handle.net/2263/42312
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.rights© Springer Science+Business Media New York 2013. The original publication is available at : http://link.springer.com/journal/11665.en_US
dc.subjectChemical adsorptionen_US
dc.subjectNiO nanostructuresen_US
dc.subjectNickel foam-graphene (NF-G)en_US
dc.subjectSupercapacitor applicationsen_US
dc.titleChemical adsorption of NiO nanostructures on nickel foam-graphene for supercapacitor applicationsen_US
dc.typePostprint Articleen_US

Files

Original bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Bello_Chemical_2013.pdf
Size:
4.08 MB
Format:
Adobe Portable Document Format
Description:
Postprint Article

License bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description: