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One-pot synthesized mesoporous Ni–Co hydroxide for high performance supercapacitors
journal contribution
posted on 2017-05-01, 00:00 authored by Y Qiao, P Jia, X Zhang, N Cai, T Shen, X Hao, Y Tang, X Wang, Lingxue KongLingxue Kong, Weimin GaoMesoporous Ni(OH)2/Co(OH)2 electrode materials were synthesized via a simple one-pot procedure by combining homogeneous precipitation and stepwise precipitation method. The configuration of the porous Ni(OH)2/Co(OH)2 electrode materials synthesized provides 3D electron transmission channels through a high conductive Co(OH)2 distributed in the peripheral nanolayer of the composites, which is beneficial to rate capability and cycle stability. The Ni(OH)2/Co(OH)2 electrode materials have a specific surface area of 229 m2 g−1, which is approximately 40% higher than that of Ni(OH)2 (163 m2 g−1). Their specific capacitance is up to 1202 and 1022 F g−1 at the current densities of 10 and 20 A g−1, respectively. Furthermore, the capacitance retention of the electrode materials at the current density of 10 A g−1 is 98% after 5000 cycles. The synthesis method provides a novel simple route to fabricate heterostructure materials for capacitors with high electrochemical performance. [Figure not available: see fulltext.]
History
Journal
IonicsVolume
23Issue
5Pagination
1229 - 1238Publisher
SpringerLocation
Berlin, GermanyPublisher DOI
ISSN
0947-7047eISSN
1862-0760Language
engPublication classification
C1 Refereed article in a scholarly journal; C Journal articleCopyright notice
2016, SpringerUsage metrics
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Categories
Keywords
Ni–Co hydroxideElectrode materialsMesoporousSupercapacitorsScience & TechnologyPhysical SciencesChemistry, PhysicalElectrochemistryPhysics, Condensed MatterChemistryPhysicsNi-Co hydroxideULTRAHIGH VOLUMETRIC CAPACITANCEELECTROCHEMICAL PROPERTIESELECTRODE MATERIALASYMMETRIC SUPERCAPACITORSHYDROTHERMAL SYNTHESISCARBON NANOSHEETSNICKEL-HYDROXIDEENERGY DENSITYDOPED CARBONNANOFLAKES