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Journal of Materials Science: Materials in Electronics

Published in:

01-02-2024

Facile hydrothermally grown CuO/Co₃O₄ nanocomposite as an effective electrode material for enhanced supercapacitor applications

Authors: K. Athira, S. Dhanapandian, S. Suthakaran, Manikandan Ayyar

Published in: Journal of Materials Science: Materials in Electronics | Issue 4/2024

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Abstract

In this study, we developed a transition metal oxide based CuO/Co₃O₄ nanocomposites (NCs) by a facile hydrothermal method and the synthesized samples have been used as electroactive material for supercapacitor applications. The as-synthesized CuO/Co₃O₄ NCs were characterized by various techniques such as XRD, FESEM, XPS, etc. FESEM shows the uniform morphology of CuO/Co₃O₄ (1:3) NCs. Powder XRD confirms the formation of CuO/Co₃O₄ NCs without any impurities. XPS revealed the chemical state of metallic species. The electrochemical properties studied by CV, GCD and EIS analysis, confirms the pseudocapacitive behaviour with high specific capacitance at low scan rate. The FESEM image of CuO/Co₃O₄ NCs shows mixture of two different morphologies, spherical and cubical. These specific morphologies provide more active sites for electrochemical redox reactions. For comparison, CuO/Co₃O₄ NCs with different molar ratios were prepared and electrochemical properties were also analysed. The synergistic effect between metal oxides has enhanced the specific capacity of the nanocomposite. Electrochemical investigation of the synthesized samples and the influence of the molar ratios of CuO to Co₃O₄ in the composites were examined. The electrode of CuO/Co₃O₄ NCs exhibited high specific capacitance of 860 F/g at a current density of 2 A/g, which is higher than the previous reports in hydrothermal method. These results highlighted that the outstanding electrochemical performance of CuO/Co₃O₄ NCs, can be considered as a promising electrode material for electrochemical energy storage supercapacitors.

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Title: Facile hydrothermally grown CuO/Co3O4 nanocomposite as an effective electrode material for enhanced supercapacitor applications
Authors: K. Athira
S. Dhanapandian
S. Suthakaran
Manikandan Ayyar
Publication date: 01-02-2024
Publisher: Springer US
Published in: Journal of Materials Science: Materials in Electronics / Issue 4/2024
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI: https://doi.org/10.1007/s10854-024-12022-8

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