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![]() | |
2017 | |
Source Publication | Journal of Materials Chemistry A
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ISSN | 20507496 20507488 |
Volume | 5Issue: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. |
DOI | 10.1039/c7ta05493a |
URL | View the original |
Indexed By | SCI |
Language | 英语 |
WOS Research Area | Chemistry ; Materials Science ; Energy & Fuels |
WOS Subject | Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary |
WOS ID | WOS:000411232100014 |
Fulltext Access | |
Citation statistics | |
Document Type | Journal article |
Collection | INSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING |
Affiliation | 1.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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