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Type: Journal article
Title: Controlled growth of CoSₓ nanostrip arrays (CoSₓ-NSA) on nickel foam for asymmetric supercapacitors
Other Titles: Controlled growth of CoS(x) nanostrip arrays (CoS(x)-NSA) on nickel foam for asymmetric supercapacitors
Author: Dubal, D.
Gund, G.
Lokhande, C.
Holze, R.
Citation: Energy Technology: generation, conversion, storage, distribution, 2014; 2(4):401-408
Publisher: Wiley
Issue Date: 2014
ISSN: 2194-4288
Statement of
Deepak P. Dubal, Girish S. Gund, Chandrakant D. Lokhande and Rudolf Holze
Abstract: A high-energy-density asymmetric supercapacitor based on cobalt sulfide nanostrip arrays (CoSₓ-NSA) as the cathode and reduced graphene oxide as the anode has been prepared; the CoSₓ-NSA was synthesized on three-dimensional (3D) nickel (Ni) foam by using a simple and scalable chemical bath deposition (CBD) method. The reduced graphene oxide sheets were deposited on the Ni foam by hydrothermal treatment of the foam in a graphene oxide solution. Novel and unique nanostructured architectures of the CoSₓ electrode provide a large effective surface area. In addition, both of the electrode materials are directly grown on the substrate without any conductive additives or binders, avoiding unnecessary materials. The asymmetric supercapacitor device operates in a wider potential window, achieving a remarkably high energy density, excellent rate capability, and long-term cycling stability. These attractive results make CoSₓ-NSA a promising material for asymmetric supercapacitors of high energy and power density, utilizing an aqueous electrolyte solution.
Keywords: Cobalt sulfide; foams; graphene oxide; pseudocapacitors; supercapacitors
Rights: © 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
DOI: 10.1002/ente.201300193
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Chemical Engineering publications

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