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Zhang, Luojiang, Hui, K. N., Hui, K. S. 
ORCID: https://orcid.org/0000-0001-7089-7587 and 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).
pp. 150-157.
ISSN 1477-9226
Abstract
High 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 Co 3 O 4 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 Co 3 O 4 @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, Co 3 O 4 and LDH. A hybrid supercapacitor with Co 3 O 4 @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.
| Item Type: | Article |
|---|---|
| Additional Information: | Funding Information: This work was supported by the Research Grants Council of the HKSAR Government (15217917), the Postdoctoral Fellowships Scheme of The Hong Kong Polytechnic University (1-YW3C), the Innovation and Technology Commission of the HKSAR Government to the Hong Kong Branch of National Rail Transit Electrification and Automation Engineering Technology Research Center (1-BBYW), the Science and Technology Development Fund of the Macau SAR (FDCT 098/ 2015/A3 and FDCT 191/2017/A3), and the Multi-Year Research Grants (MYRG2017-00216-FST and MYRG2018-00192-IAPME) from the Research Services and Knowledge Transfer Office at the University of Macau. Publisher Copyright: © The Royal Society of Chemistry. |
| Uncontrolled Keywords: | inorganic chemistry ,/dk/atira/pure/subjectarea/asjc/1600/1604 |
| Faculty \ School: | Faculty of Science |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 04 Apr 2024 09:30 |
| Last Modified: | 04 Apr 2024 09:30 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/94802 |
| DOI: | 10.1039/C8DT03350A |
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