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Binder-free hierarchical core-shell-like CoMn2O4@MnS nanowire arrays on nickel foam as a battery-type electrode material for high-performance supercapacitors
- Source :
- Journal of Energy Storage. 36:102377
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Binder-free hierarchical core-shell-like CoMn2O4@MnS heterostructures have been successfully grown on the surface of nickel (Ni) foam using facile two-step hydrothermal deposition route. In supercapacitor applications, the as-prepared core-shell-like CoMn2O4@MnS composite electrode has been used successfully as a battery-type material. Scanning electron microscope (SEM) and transmission electron microscope characterizations reveal that the as-prepared CoMn2O4@MnS electrode delivers a dandelion-like heterostructures that contains the MnS nanoparticles grown on the surface of CoMn2O4 nanowire arrays (NWAs), resulting a core-shell-like structure. In addition to increasing electrochemical behaviour and precise surface area, the novel core-shell-like heterostructures provide superhighways for the ultra-fast transfer of electrons and ions. The probable plateaus of cyclic voltammetry and galvanostatic charge-discharge experiments suggest that Faradic battery-type redox activity is given by the as-prepared core-shell-like CoMn2O4@MnS NWAs electrode. As a battery-type material, core-shell-like CoMn2O4@MnS NWAs electrode exhibits a outstanding specific capacity of (~213.0 mA h g−1 at 2 Ag−1), remarkable rate capability (~89.91% retains even at 10 A g−1), and excellent cycling stability (~91.42% at 6 A g−1 over 5000 cycles), which are much higher than those of the bare CoMn2O4 electrode. The excellent energy storage performance corroborates that CoMn2O4@MnS NWAs can serve as an advanced battery-type electrode material for supercapacitor applications.
- Subjects :
- Supercapacitor
Materials science
Renewable Energy, Sustainability and the Environment
Scanning electron microscope
020209 energy
Nanowire
Energy Engineering and Power Technology
Nanoparticle
02 engineering and technology
021001 nanoscience & nanotechnology
Electrochemistry
Chemical engineering
Transmission electron microscopy
Electrode
0202 electrical engineering, electronic engineering, information engineering
Electrical and Electronic Engineering
Cyclic voltammetry
0210 nano-technology
Subjects
Details
- ISSN :
- 2352152X
- Volume :
- 36
- Database :
- OpenAIRE
- Journal :
- Journal of Energy Storage
- Accession number :
- edsair.doi...........7c22c21920dc157699c068e22efbec0b