Synthesis and Characterization of a NiCo2O4@NiCo2O4 Hierarchical Mesoporous Nanoflake Electrode for Supercapacitor Applications

Chen, Xin, Li, Hui, Xu, Jianzhou, Jaber, F., Musharavati, F., Zalezhad, Erfan, Bae, S., Hui, K. S. ORCID: https://orcid.org/0000-0001-7089-7587, Hui, K. N. and Liu, Junxing (2020) Synthesis and Characterization of a NiCo2O4@NiCo2O4 Hierarchical Mesoporous Nanoflake Electrode for Supercapacitor Applications. Nanomaterials, 10 (7). pp. 1-13. ISSN 2079-4991

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Abstract

In this study, we synthesized binder-free NiCo2O4@NiCo2O4 nanostructured materials on nickel foam (NF) by combined hydrothermal and cyclic voltammetry deposition techniques followed by calcination at 350 °C to attain high-performance supercapacitors. The hierarchical porous NiCo2O4@NiCo2O4 structure, facilitating faster mass transport, exhibited good cycling stability of 83.6% after 5000 cycles and outstanding specific capacitance of 1398.73 F g−1 at the current density of 2 A·g−1, signifying its potential for energy storage applications. A solid-state supercapacitor was fabricated with the NiCo2O4@NiCo2O4 on NF as the positive electrode and the active carbon (AC) was deposited on NF as the negative electrode, delivering a high energy density of 46.46 Wh kg−1 at the power density of 269.77 W kg−1. This outstanding performance was attributed to its layered morphological characteristics. This study explored the potential application of cyclic voltammetry depositions in preparing binder-free NiCo2O4@NiCo2O4 materials with more uniform architecture for energy storage, in contrast to the traditional galvanostatic deposition methods.

Item Type: Article
Uncontrolled Keywords: electrodeposition,nanostructure,nico o,supercapacitors,chemical engineering(all),materials science(all) ,/dk/atira/pure/subjectarea/asjc/1500
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Depositing User: LivePure Connector
Date Deposited: 07 Jul 2020 23:58
Last Modified: 22 Oct 2022 06:26
URI: https://ueaeprints.uea.ac.uk/id/eprint/75953
DOI: 10.3390/nano10071292

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