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Wu, Shuxing, Guo, Hengzhi, Hui, Kwan San 
ORCID: https://orcid.org/0000-0001-7089-7587 and Hui, Kwun Nam
(2019)
Rational design of integrated CuO@CoxNi1−x(OH)2 nanowire arrays on copper foam for high-rate and long-life supercapacitors.
Electrochimica Acta, 295.
pp. 759-768.
ISSN 0013-4686
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Abstract
Rational electrode architectural design, favorable electrode composition, and versatile synthesis approach play a significant role in developing advanced electrodes for high-performance supercapacitor. In this work, we report a facile approach for fabricating 1D hierarchical CuO@CoxNi1−x(OH)2 nanowire arrays grown on 3D highly conductive copper foam. The optimized CuO@Co0.2Ni0.8(OH)2 electrode delivers an ultrahigh specific capacity of 374.7 mAh g−1 at 2 A g−1 with exceptional rate capability (301.7 mAh g−1 at 50 A g−1) and remarkable cycling stability (95.9% after 10 000 cycles at 50 A g−1). A flexible asymmetric solid-state supercapacitor (ASC) is fabricated using the optimized CuO@Co0.2Ni0.8(OH)2 as the positive electrode, activated carbon-coated nickel foam as the negative electrode, and polyvinyl alcohol/KOH gel as electrolyte. The flexible ASC operating with a potential window of 0–1.6 V delivers an energy density of 46.5 Wh kg−1 with a power density of 526.9 W kg−1. The ASC also exhibits excellent cycling stability with a capacity retention of 84.3% after 10 000 cycles at a current density of 7 A g−1.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | copper oxide,nickel–cobalt hydroxide,copper foam,nanowire arrays,flexible asymmetric supercapacitor |
| Faculty \ School: | Faculty of Science > School of Mathematics (former - to 2024) |
| UEA Research Groups: | Faculty of Science > Research Groups > Emerging Technologies for Electric Vehicles (EV) Faculty of Science > Research Groups > Energy Materials Laboratory |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 06 Nov 2018 09:30 |
| Last Modified: | 25 Sep 2024 13:43 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/68774 |
| DOI: | 10.1016/j.electacta.2018.10.183 |
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