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An asymmetric supercapacitor with excellent cycling performance realized by hierarchical porous NiGa 2 O 4 nanosheets
Liu S.2; Hui K.S.3; Hui K.N.1; Li H.-F.1; Ng K.W.1; Xu J.1; Tang Z.1; Jun S.C.2
2017
Source PublicationJournal of Materials Chemistry A
ISSN20507496 20507488
Volume5Issue:36Pages:19046-19053
Abstract

Rational design of the composition and electrochemically favorable structural configuration of electrode materials are highly required to develop high-performance supercapacitors. Here, we report our findings on the design of interconnected NiGa O nanosheets as advanced cathode electrodes for supercapacitors. Rietveld refinement analysis demonstrates that the incorporation of Ga into NiO leads to a larger cubic lattice parameter that promotes faster charge-transfer kinetics, enabling significantly improved electrochemical performance. The NiGa O electrode delivers a specific capacitance of 1508 F g at a current density of 1 A g with a capacitance retention of 63.7% at 20 A g , together with excellent cycling stability after 10000 charge-discharge cycles (capacitance retention of 102.4%). An asymmetric supercapacitor device was assembled by using NiGa O and Fe O as cathode and anode electrodes, respectively. The ASC delivers a high energy density of 45.2 W h kg at a power density of 1600 W kg with exceptional cycling stability (94.3% cell capacitance retention after 10000 cycles). These results suggest that NiGa O can serve as a new class cathode material for advanced electrochemical energy storage applications.

DOI10.1039/c7ta05493a
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:000411232100014
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Cited Times [WOS]:20   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Affiliation1.Universidade de Macau
2.Yonsei University
3.University of East Anglia
Recommended Citation
GB/T 7714
Liu S.,Hui K.S.,Hui K.N.,et al. An asymmetric supercapacitor with excellent cycling performance realized by hierarchical porous NiGa 2 O 4 nanosheets[J]. Journal of Materials Chemistry A,2017,5(36):19046-19053.
APA Liu S..,Hui K.S..,Hui K.N..,Li H.-F..,Ng K.W..,...&Jun S.C..(2017).An asymmetric supercapacitor with excellent cycling performance realized by hierarchical porous NiGa 2 O 4 nanosheets.Journal of Materials Chemistry A,5(36),19046-19053.
MLA Liu S.,et al."An asymmetric supercapacitor with excellent cycling performance realized by hierarchical porous NiGa 2 O 4 nanosheets".Journal of Materials Chemistry A 5.36(2017):19046-19053.
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