Constructing Co<sub>3</sub>O<sub>4</sub> Nanowire@NiCo<sub>2</sub>O<sub>4</sub> Nanosheet Hierarchical Array as Electrode Material for High-Performance Supercapacitor

Constructing Co<sub>3</sub>O<sub>4</sub> Nanowire@NiCo<sub>2</sub>O<sub>4</sub> Nanosheet Hierarchical Array as Electrode Material for High-Performance Supercapacitor

The Co<sub>3</sub>O<sub>4</sub> nanowire@NiCo<sub>2</sub>O<sub>4</sub> nanosheet hierarchical array was constructed on Ni foam using hydrothermal and annealing approaches in turn, from which a NiCo<sub>2</sub>O<sub>4</sub> nanos...

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Bibliographic Details
Main Authors: Bo Xu, Lu Pan, Yaqi Wang, Menglong Liu
Format: Article
Language:English
Published: MDPI AG 2024-10-01
Series:Nanomaterials
Subjects:
Co<sub>3</sub>O<sub>4</sub> nanowire
NiCo<sub>2</sub>O<sub>4</sub> nanosheets
composites
hierarchical array
supercapacitor
Online Access:https://www.mdpi.com/2079-4991/14/21/1703
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Summary:The Co<sub>3</sub>O<sub>4</sub> nanowire@NiCo<sub>2</sub>O<sub>4</sub> nanosheet hierarchical array was constructed on Ni foam using hydrothermal and annealing approaches in turn, from which a NiCo<sub>2</sub>O<sub>4</sub> nanosheet could self-assemble on the Co<sub>3</sub>O<sub>4</sub> nanowire. The structure and morphology of the Co<sub>3</sub>O<sub>4</sub> nanowire@NiCo<sub>2</sub>O<sub>4</sub> nanosheet hierarchical array were characterized via XRD, EDS, SEM, and FESEM, respectively. The electrochemical performance of the composite array was measured via a cyclic voltammetry curve, galvanostatic current charge–discharge, charge–discharge cycle, and electrochemical impedance and then compared with the Co<sub>3</sub>O<sub>4</sub> nanowire. The results show that the Co<sub>3</sub>O<sub>4</sub> nanowire@NiCo<sub>2</sub>O<sub>4</sub> nanosheet hierarchical array could reach a high value of 2034 F g<sup>−1</sup> at a current density of 2.5 A g<sup>−1</sup>. After 5000 galvanostatic charge–discharge cycles, the specific capacitance of the Co<sub>3</sub>O<sub>4</sub> nanowire@NiCo<sub>2</sub>O<sub>4</sub> nanosheet hierarchical array could still maintain 94.7% of the original value. Therefore, the Co<sub>3</sub>O<sub>4</sub> nanowire@NiCo<sub>2</sub>O<sub>4</sub> nanosheet hierarchical array would be a desirable electrode material for a high-performance supercapacitor.
ISSN:2079-4991

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