Core-shell assembly of CoO@NiO-ZnO nanoarrays as battery-type electrodes for high-performance supercapatteries
Core-shell Co 3 O 4 @NiO-ZnO nanocomposite arrays are successfully fabricated by annealing metal-organic framework assisted precursors and are investigated as binder-free battery-type electrodes for supercapacitors with a remarkably enhanced performance. The Co 3 O 4 @NiO-ZnO electrode delivers ultr...
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Published in | Inorganic chemistry frontiers Vol. 6; no. 9; pp. 2481 - 2487 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Published |
10.09.2019
|
Online Access | Get full text |
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Summary: | Core-shell Co
3
O
4
@NiO-ZnO nanocomposite arrays are successfully fabricated by annealing metal-organic framework assisted precursors and are investigated as binder-free battery-type electrodes for supercapacitors with a remarkably enhanced performance. The Co
3
O
4
@NiO-ZnO electrode delivers ultrahigh areal capacitance/capacity (4678 mF cm
−2
/1965 C cm
−2
/302 C g
−1
at a current density of 2 mA cm
−2
) and excellent cycling stability (83% retention over 10 000 cycles), due to multiple advantages offered by the intriguing core-shell structure, such as large surface area, fast electrolyte penetration, efficient charge transport, highly exposed active sites, and the synergistic effect between them. Moreover, an assembled supercapattery using Co
3
O
4
@NiO-ZnO arrays as a positive electrode and active carbon as a negative electrode yields a high energy density of 162 μW h cm
−2
at a high power density of 1.676 mW cm
−2
and a superior capacitance retention of 93% over 10 000 cycles. These excellent results indicate that this efficient strategy can be extended to prepare core-shell-type multi-metallic oxide arrays for high-performance supercapatteries.
Core-shell Co
3
O
4
@NiO-ZnO nanoarrays are fabricated by annealing metal-organic framework assisted precursors and investigated as battery-type electrode for supercapattery. |
---|---|
Bibliography: | 2 Electronic supplementary information (ESI) available: Photograph of NF, FT-IR, EDS and N adsorption-desorption isotherms, the electrochemical performances. See DOI 10.1039/c9qi00607a |
ISSN: | 2052-1553 |
DOI: | 10.1039/c9qi00607a |