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3D heterostructured cobalt oxide@layered double hydroxide core-shell networks on nickel foam for high-performance hybrid supercapacitor
Zhang, Luojiang1,2; Hui, K. N.3; Hui, K. S.4; Or, Siu Wing1,2
2019-01-07
Source PublicationDALTON TRANSACTIONS
ISSN1477-9226
Volume48Issue:1Pages:150-157
AbstractHigh performance of an electrode relies largely on scrupulous design of nanoarchitectures and smart hybridization of bespoke active materials. Here, a 3D heterostructured core-shell architecture was fabricated as a supercapacitor electrode, in which Co3O4 nanowire cores were grown on nickel foam prior to the in situ deposition of layered double hydroxide (LDH) nanosheet shells. Owing to the unique configuration and hybridization, the as-fabricated Co3O4@LDH core-shell electrode exhibited high capacities of 818.6 C g(-1) at 2 A g(-1) and 479.3 C g(-1) at 40 A g(-1) (3.2 C cm(-2) at 7.8 mA cm(-2) and 1.87 C cm(-2) at 156 mA cm(-2)), which were much higher than those of the individual components, namely, Co3O4 and LDH. A hybrid supercapacitor with Co3O4@LDH as the positive electrode and graphene nanosheets as the negative electrode yielded an energy density of 53.2 W h kg(-1) and a power density of 16.4 kW kg(-1), which outperformed devices reported in the literature; the device also exhibited long-term cycling stability and retained 71% of its initial capacity even after 10 000 cycles at 6 A g(-1). The rational design of the core-shell architecture may lead to the development of new strategies for fabricating promising electrode materials for electrochemical energy storage.
DOI10.1039/c8dt03350a
URLView the original
Indexed BySCI
Language英语
WOS Research AreaChemistry
WOS SubjectChemistry, Inorganic & Nuclear
WOS IDWOS:000453681400019
PublisherROYAL SOC CHEMISTRY
Fulltext Access
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Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Hong Kong Polytech Univ, Dept Elect Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China;
2.Natl Rail Transit Electrificat & Automat Engn Tec, Hong Kong Branch, Hong Kong, Peoples R China;
3.Univ Macau, Inst Appl Phys & Mat Engn, Ave Univ, Taipa, Macau, Peoples R China;
4.Univ East Anglia, Fac Sci, Norwich NR4 7TJ, Norfolk, England
Recommended Citation
GB/T 7714
Zhang, Luojiang,Hui, K. N.,Hui, K. S.,et al. 3D heterostructured cobalt oxide@layered double hydroxide core-shell networks on nickel foam for high-performance hybrid supercapacitor[J]. DALTON TRANSACTIONS,2019,48(1):150-157.
APA Zhang, Luojiang,Hui, K. N.,Hui, K. S.,&Or, Siu Wing.(2019).3D heterostructured cobalt oxide@layered double hydroxide core-shell networks on nickel foam for high-performance hybrid supercapacitor.DALTON TRANSACTIONS,48(1),150-157.
MLA Zhang, Luojiang,et al."3D heterostructured cobalt oxide@layered double hydroxide core-shell networks on nickel foam for high-performance hybrid supercapacitor".DALTON TRANSACTIONS 48.1(2019):150-157.
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