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Erschienen in: Journal of Materials Science: Materials in Electronics 2/2020

04.12.2019

Facile synthesis of MnO2@NiCo2O4 core–shell nanowires as good performance asymmetric supercapacitor

verfasst von: Xiuhua Wang, Yuan Yang, Peng He, Fuqiang Zhang, Jiping Tang, Zeyu Guo, Ronghui Que

Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 2/2020

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Abstract

Hierarchical MnO2@NiCo2O4 core–shell nanostructures are well fabricated via a simple two-step hydrothermal process. The MnO2@NiCo2O4 core–shell nanostructures materials electrode presents a high capacitance of 684 F g−1 at 2 A g−1 current density, 40 times higher than that of the single MnO2 nanowires electrode. And 87.4% retain is approached even at a high current density of 15 A g−1, showing satisfactory rate capability. Furthermore, the theoretical analysis reveals the surface capacitance contribution is predominant in the capacitive contribution. The asymmetric supercapacitor assembled with MnO2@NiCo2O4 exhibited a maximum energy density of 35.6 Wh kg−1 and a maximum power density of 745.1 W kg−1. After 7000 charge–discharge cycling at a current density of 4 A g−1, it still can maintain 90% of the initial capacitance. These results suggest that MnO2@NiCo2O4 is the promising candidate of supercapacitors.

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Metadaten
Titel
Facile synthesis of MnO2@NiCo2O4 core–shell nanowires as good performance asymmetric supercapacitor
verfasst von
Xiuhua Wang
Yuan Yang
Peng He
Fuqiang Zhang
Jiping Tang
Zeyu Guo
Ronghui Que
Publikationsdatum
04.12.2019
Verlag
Springer US
Erschienen in
Journal of Materials Science: Materials in Electronics / Ausgabe 2/2020
Print ISSN: 0957-4522
Elektronische ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-019-02649-3

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