4.7 Article

Binder-free hierarchical core-shell-like CoMn2O4@MnS nanowire arrays on nickel foam as a battery-type electrode material for high-performance supercapacitors

期刊

JOURNAL OF ENERGY STORAGE
卷 36, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.est.2021.102377

关键词

Binder-free Electrode; Nanowire arrays; CoMn2O4@MnS; Battery-type; High- performance supercapacitor

资金

  1. UAEU Program for Advanced Research (UPAR) [31S312]

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Binder-free hierarchical core-shell-like CoMn2O4@MnS heterostructures have been successfully grown on the surface of nickel foam, providing superhighways for ultra-fast transfer of electrons and ions. The as-prepared core-shell-like CoMn2O4@MnS NWAs electrode exhibits outstanding specific capacity, remarkable rate capability, and excellent cycling stability, making it an advanced battery-type electrode material for supercapacitor applications.
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-shelllike 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.

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