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Chen, Xin, Xie, Rui, Li, Hui, Jaber, F., Musharavati, F., Zalnezhad, E., Bae, S., Hui, K. S. 
ORCID: https://orcid.org/0000-0001-7089-7587 and Hui, K. N.
(2020)
Supercapacitor performance of porous nickel cobaltite nanosheets.
Scientific Reports, 10.
ISSN 2045-2322
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Abstract
In this work, nickel cobaltite (NiCo2O4) nanosheets with a porous structure were fabricated on nickel foam as a working electrode for supercapacitor applications. The nanosheets were fabricated by electrochemical deposition of nickel–cobalt hydroxide on the nickel foam substrate at ambient temperature in a three-electrode cell followed by annealing at 300 °C to transform the coating into a porous NiCo2O4 nanosheet. Field emission scanning electron microscopy and transmission electron microscopy revealed a three-dimensional mesoporous structure, which facilitates ion transport and electronic conduction for fast redox reactions. For one cycle, the NiCo2O4 electrodeposited nickel foam has a high specific capacitance (1734.9 F g−1) at a current density (CD) of 2 A g−1. The electrode capacitance decreased by only approximately 12.7% after 3500 cycles at a CD of 30 A g−1. Moreover, a solid-state asymmetric supercapacitor (ASC) was built utilising the NiCo2O4 nanosheets, carbon nanotubes, and a polyvinyl alcohol-potassium hydroxide gel as the anode, cathode, and solid-state electrolyte, respectively. The ASC displayed great electrochemical properties with a 42.25 W h kg−1 energy density at a power density of 298.79 W kg−1.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | general ,/dk/atira/pure/subjectarea/asjc/1000 |
| Faculty \ School: | Faculty of Science > School of Engineering (former - to 2024) |
| UEA Research Groups: | Faculty of Science > Research Groups > Energy Materials Laboratory |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 14 Nov 2020 01:16 |
| Last Modified: | 25 Sep 2024 15:09 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/77697 |
| DOI: | 10.1038/s41598-020-75946-1 |
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