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Vertically stacked bilayer CuCo2O4/MnCo2O4 heterostructures on functionalized graphite paper for high-performance electrochemical capacitors
Liu S.1; San Hui K.2; Hui K.N.3; Yun J.M.4; Kim K.H.1,4
2016
Source PublicationJournal of Materials Chemistry A
ISSN20507488
Volume4Issue:21Pages:8061
Abstract

Cobaltite systems with spinel structures are promising cathode materials for next-generation high-performance electrochemical capacitors because of their high electrochemical stability. However, increasing the mass loading of active materials without sacrificing the geometry of the nanostructures remains a challenge. In this study, we propose vertically stacked bilayer spinel heterostructures constructed from hierarchical CuCo2O4/MnCo2O4 on graphite paper as highly capable supercapacitor electrodes. A two-step hydrothermal method with post annealing treatment is used in the preparation of the heterostructures. The CuCo2O4/MnCo2O4 electrode delivers a remarkable specific capacitance of 1434 F g-1 at 0.5 A g-1, considerable high-rate capability (810 F g-1 at 15 A g-1), and an excellent cycling stability, maintaining 81.4% at 10 A g-1 after 5000 cycles. An electrochemical capacitor device operating at 1.6 V is also constructed using CuCo2O4/MnCo2O4 and graphene as positive and negative electrodes, respectively. The device shows a high energy density of 42.1 W h kg-1 at a power density of 400 W kg-1, as well as good cycling stability (88.4% retention after 10000 cycles). The concept of stacking heteronanostructures can potentially enrich the electrochemical performance of metal oxides for next-generation electrochemical capacitors. © The Royal Society of Chemistry 2016.

DOI10.1039/c6ta00960c
URLView the original
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Materials Science ; Energy & Fuels
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS IDWOS:000378102400010
The Source to ArticleScopus
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Cited Times [WOS]:117   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Affiliation1.Pusan Natl Univ, Dept Mat Sci & Engn, San 30 Jangjeon Dong, Busan 609735, South Korea
2.Hanyang Univ, Dept Mech Convergence Engn, 17 Haengdang Dong, Seoul 133791, South Korea
3.Univ Macau, Inst Appl Phys & Mat Engn, Ave Univ, Taipa, Macau, Peoples R China
4.Pusan Natl Univ, Global Frontier R&D Ctr Hybrid Interface Mat, 30 Jangjeon Dong, Busan 609735, South Korea
Recommended Citation
GB/T 7714
Liu S.,San Hui K.,Hui K.N.,et al. Vertically stacked bilayer CuCo2O4/MnCo2O4 heterostructures on functionalized graphite paper for high-performance electrochemical capacitors[J]. Journal of Materials Chemistry A,2016,4(21):8061.
APA Liu S.,San Hui K.,Hui K.N.,Yun J.M.,&Kim K.H..(2016).Vertically stacked bilayer CuCo2O4/MnCo2O4 heterostructures on functionalized graphite paper for high-performance electrochemical capacitors.Journal of Materials Chemistry A,4(21),8061.
MLA Liu S.,et al."Vertically stacked bilayer CuCo2O4/MnCo2O4 heterostructures on functionalized graphite paper for high-performance electrochemical capacitors".Journal of Materials Chemistry A 4.21(2016):8061.
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