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Title: Superior performance asymmetric supercapacitors based on a directly grown commercial mass 3D Co3O4@Ni(OH)2 core-shell electrode
Authors: Tang, C.-H.
Yin, X.
Gong, H. 
Keywords: asymmetric supercapacitors
cobalt oxide
core-shell nanostructure
nickel hydroxide
Issue Date: 13-Nov-2013
Citation: Tang, C.-H., Yin, X., Gong, H. (2013-11-13). Superior performance asymmetric supercapacitors based on a directly grown commercial mass 3D Co3O4@Ni(OH)2 core-shell electrode. ACS Applied Materials and Interfaces 5 (21) : 10574-10582. ScholarBank@NUS Repository.
Abstract: Pseudocapacitors based on fast surface Faradaic reactions can achieve high energy densities together with high power densities. Usually, researchers develop a thin layer of active materials to increase the energy density by enhancing the surface area; meanwhile, this sacrifices the mass loading. In this work, we developed a novel 3D core-shell Co3O4@Ni(OH) 2 electrode that can provide high energy density with very high mass loading. Core-shell porous nanowires (Co3O4@Ni(OH) 2) were directly grown on a Ni current collector as an integrated electrode/collector for the supercapacitor anode. This Co3O 4@Ni(OH)2 core-shell nanoarchitectured electrode exhibits an ultrahigh areal capacitance of 15.83 F cm-2. The asymmetric supercapacitor prototypes, assembled using Co3O4@Ni(OH) 2 as the anode, reduced graphene oxide (RGO) or active carbon (AC) as the cathode, and 6 M aqueous KOH as the electrolyte, exhibit very high energy densities falling into the energy-density range of Li-ion batteries. Because of the large mass loading and high energy density, the prototypes can drive a minifan or light a bulb even though the size is very small. These results indicate that our asymmetric supercapacitors have outstanding potential in commercial applications. Systematic study and scientific understanding were carried out. © 2013 American Chemical Society.
Source Title: ACS Applied Materials and Interfaces
ISSN: 19448244
DOI: 10.1021/am402436q
Appears in Collections:Staff Publications

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