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Facile Synthesis of Microsphere Copper Cobalt Carbonate Hydroxides Electrode for Asymmetric Supercapacitor
Liu S.; Hui K.S.; Hui K.N.; Jadhav V.V.; Xia Q.X.; Yun J.M.; Cho Y.R.; Mane R.S.; Kim K.H.
2016
Source PublicationElectrochimica Acta
ISSN134686
Volume188Pages:898
AbstractPorous microspheres copper cobalt carbonate hydroxides (CuxCo2-xCH) pseudocapacitive electrode material comprised of nanoplates via a facile hydrothermal method were presented. Significantly, the crystalline structure, morphology and electrochemical performance of the CuxCo2-xCH can be readily manipulated by varying the Cu/Co molar ratios. Among various stoichiometries of CuxCo2-xCH porous microspheres studied, Cu1.79Co0.21CH consisted of nanoplates with a mean thickness of ∼35 nm showed a high specific capacitance of 789 F g-1 at a current destiny of 1 A g-1 and good rate ability. Furthermore, the optimized Cu1.79Co0.21CH electrode also exhibited remarkable high cycling stability, ca 77.5% after 3000 charge/discharge cycles at current density of 5 A g-1. An asymmetric device was constructed from optimized Cu1.79Co0.21CH materials on nickel foam (NF) as cathode electrode and graphene on NF as anode electrode in a 6 M KOH electrolyte. The asymmetric Cu1.79Co0.21CH/NF//graphene/NF supercapacitor device delivered a specific capacitance of 60.5 F g-1 in a potential range of 0-1.6 V. A high energy density of 21.5 W h kg-1 was achieved at the power density of 200 W kg-1. More significantly, the designed device exhibited excellent cycling stability with 73.3% capacity retention after 5000 cycles. © 2015 Elsevier Ltd. All rights reserved.
KeywordAsymmetric supercapacitor Copper cobalt carbonate hydroxide Hydrothermal method Microsphere Nanoplate
DOI10.1016/j.electacta.2015.12.018
URLView the original
Language英语
The Source to ArticleScopus
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Cited Times [WOS]:67   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
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Liu S.,Hui K.S.,Hui K.N.,et al. Facile Synthesis of Microsphere Copper Cobalt Carbonate Hydroxides Electrode for Asymmetric Supercapacitor[J]. Electrochimica Acta,2016,188:898.
APA Liu S..,Hui K.S..,Hui K.N..,Jadhav V.V..,Xia Q.X..,...&Kim K.H..(2016).Facile Synthesis of Microsphere Copper Cobalt Carbonate Hydroxides Electrode for Asymmetric Supercapacitor.Electrochimica Acta,188,898.
MLA Liu S.,et al."Facile Synthesis of Microsphere Copper Cobalt Carbonate Hydroxides Electrode for Asymmetric Supercapacitor".Electrochimica Acta 188(2016):898.
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