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Liu, Shude, Hui, Kwan San 
ORCID: https://orcid.org/0000-0001-7089-7587 and Hui, Kwun Nam
(2015)
1D hierarchical MnCo2O4 nanowire@MnO2 sheet core–shell arrays on graphite paper as superior electrodes for asymmetric supercapacitors.
ChemNanoMat, 1 (8).
pp. 593-602.
ISSN 2199-692X
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Abstract
Heterostructured metal oxide core–shell architectures have attracted considerable attention owing to their superior electrochemical performance in supercapacitors compared to a single structure. Here, we report a simple and effective synthesis of hierarchical MnCo2O4 nanowire@MnO2 sheet core–shell nanostructures anchored on graphite paper for use in supercapacitors. The proposed electrode exhibits a specific capacitance of 2262 F g−1 at 1 A g−1. In addition, good rate capability and excellent cycling performance are observed. An asymmetric supercapacitor with operating potential at 1.6 V is demonstrated using MnCo2O4@MnO2 as cathode and graphene/nickel foam (NF) as anode. The MnCo2O4@MnO2//graphene/NF asymmetric device shows a high energy density of 85.7 Wh kg−1 at a power density of 800 W kg−1 while maintaining a high energy density of 34.7 Wh kg−1 at 24 kW kg−1. Moreover, the device demonstrates a long-term cycling stability of 81.6 % retention of its initial specific capacitance.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | asymmetric supercapacitor,core–shell,heterostructures,mnco2o4 nanowire,mno2 sheet |
| Related URLs: | |
| Depositing User: | Pure Connector |
| Date Deposited: | 06 Feb 2018 11:30 |
| Last Modified: | 04 Dec 2024 01:28 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/66231 |
| DOI: | 10.1002/cnma.201500105 |
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