Constructing Co3O4 Nanowire@NiCo2O4 Nanosheet Hierarchical Array as Electrode Material for High-Performance Supercapacitor

Xu, Bo; Pan, Lu; Wang, Yaqi; Liu, Menglong

doi:10.3390/nano14211703

Open AccessArticle

Constructing Co₃O₄ Nanowire@NiCo₂O₄ Nanosheet Hierarchical Array as Electrode Material for High-Performance Supercapacitor

by

Bo Xu

,

Lu Pan

^*,

Yaqi Wang

and

Menglong Liu

School of Chemistry and Materials Engineering, Huainan Normal University, Huainan 232038, China

^*

Author to whom correspondence should be addressed.

Nanomaterials 2024, 14(21), 1703; https://doi.org/10.3390/nano14211703

Submission received: 23 September 2024 / Revised: 21 October 2024 / Accepted: 22 October 2024 / Published: 24 October 2024

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Abstract

The Co₃O₄ nanowire@NiCo₂O₄ nanosheet hierarchical array was constructed on Ni foam using hydrothermal and annealing approaches in turn, from which a NiCo₂O₄ nanosheet could self-assemble on the Co₃O₄ nanowire. The structure and morphology of the Co₃O₄ nanowire@NiCo₂O₄ 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 Co₃O₄ nanowire. The results show that the Co₃O₄ nanowire@NiCo₂O₄ nanosheet hierarchical array could reach a high value of 2034 F g⁻¹ at a current density of 2.5 A g⁻¹. After 5000 galvanostatic charge–discharge cycles, the specific capacitance of the Co₃O₄ nanowire@NiCo₂O₄ nanosheet hierarchical array could still maintain 94.7% of the original value. Therefore, the Co₃O₄ nanowire@NiCo₂O₄ nanosheet hierarchical array would be a desirable electrode material for a high-performance supercapacitor.

Keywords: Co₃O₄ nanowire; NiCo₂O₄ nanosheets; composites; hierarchical array; supercapacitor

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MDPI and ACS Style

Xu, B.; Pan, L.; Wang, Y.; Liu, M. Constructing Co₃O₄ Nanowire@NiCo₂O₄ Nanosheet Hierarchical Array as Electrode Material for High-Performance Supercapacitor. Nanomaterials 2024, 14, 1703. https://doi.org/10.3390/nano14211703

AMA Style

Xu B, Pan L, Wang Y, Liu M. Constructing Co₃O₄ Nanowire@NiCo₂O₄ Nanosheet Hierarchical Array as Electrode Material for High-Performance Supercapacitor. Nanomaterials. 2024; 14(21):1703. https://doi.org/10.3390/nano14211703

Chicago/Turabian Style

Xu, Bo, Lu Pan, Yaqi Wang, and Menglong Liu. 2024. "Constructing Co₃O₄ Nanowire@NiCo₂O₄ Nanosheet Hierarchical Array as Electrode Material for High-Performance Supercapacitor" Nanomaterials 14, no. 21: 1703. https://doi.org/10.3390/nano14211703

APA Style

Xu, B., Pan, L., Wang, Y., & Liu, M. (2024). Constructing Co₃O₄ Nanowire@NiCo₂O₄ Nanosheet Hierarchical Array as Electrode Material for High-Performance Supercapacitor. Nanomaterials, 14(21), 1703. https://doi.org/10.3390/nano14211703

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Constructing Co₃O₄ Nanowire@NiCo₂O₄ Nanosheet Hierarchical Array as Electrode Material for High-Performance Supercapacitor

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