Bahmani, F;
Kazemi, SH;
Wu, Y;
Liu, L;
Xu, Y;
Lei, Y;
(2019)
CuMnO2-reduced graphene oxide nanocomposite as a free-standing electrode for high-performance supercapacitors.
Chemical Engineering Journal
, 375
, Article 121966. 10.1016/j.cej.2019.121966.
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Abstract
Free-standing electrodes have attracted wide attention for advanced supercapacitors. Herein, direct deposition of CuMnO2 and CuMnO2-reduced graphene oxide (rGO) nanocomposite on nickel foam (NF) substrates was performed through a simple hydrothermal process. The simultaneous deposition makes full use of the synergistic effect formed by the large pseudocapacitance of CuMnO2 and excellent electrical conductivity of rGO, which results a greater performance improvement of the nanocomposite comparing with that of bare CuMnO2. Remarkably, the CuMnO2-rGO/NF electrode displays a large specific capacitance of 1727 F g-1 at 3 A g-1 and manifests exceptional cycling stability with a retention ratio of 125% of the initial capacitance over consecutive 5000 cycles. Furthermore, a rGO/NF//CuMnO2-rGO/NF asymmetric supercapacitor exhibits great electrochemical performance by delivering high energy density (37.5 Wh kg-1) and high power density (4250 W kg-1) as well as excellent cycling stability (3.3% decay after 4000 cycles). The presented results suggest that CuMnO2-rGO nanocomposite can be considered as a potential candidate for highly stable and high-rate supercapacitors.
| Type: | Article |
|---|---|
| Title: | CuMnO2-reduced graphene oxide nanocomposite as a free-standing electrode for high-performance supercapacitors |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.cej.2019.121966 |
| Publisher version: | https://doi.org/10.1016/j.cej.2019.121966 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Free-standing electrode, nanocomposite, synergistic effect, asymmetric supercapacitors |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10076840 |
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