Govindan Suresh Kumar (2025) Exploring the synergistic effects of rGO and MWCNT in NiO-based mesoporous hybrid nanostructures for supercapacitor applications. Journal of Industrial and Engineering Chemistry, 153. pp. 783-796. ISSN 1226-086X

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Abstract

In this study, we present a microwave-assisted synthesis to produce NiO, MWCNT@NiO, and rGO@NiO hybrid
nanostructures efficiently. Comprehensive characterizations, including XRD, FTIR, FESEM, TEM, EDX, and BET
confirmed the formation and structural integrity of MWCNT@NiO and rGO@NiO nanostructures. The nano�structures’ electrochemical efficiency was examined in a 2 M KOH electrolyte. The specific capacitance of the
rGO@NiO nanostructure is found to be the highest, with 491F/g at a current density of 1 A/g, compared to pure
NiO (255F/g) and MWCNT@NiO (370F/g). This greater performance comes from the collaborative properties of
the reduced graphene oxide, providing better ion diffusion, charge transfer efficiency, and active surface area
with exemplary stability of capacitance of 91 % after 5000 cycles, which is much better cycling and mechanical
stability than that of MWCNT@NiO and pure NiO. Furthermore, the electrochemical performance of the
rGO@NiO ASC device was assessed using 1 M KOH as the electrolyte throughout a potential range of 0 to 1.2 V.
At a current density of 1A/g, the device provided 31.92 Wh/kg energy density and 599.96 W/kg power density.
The ASC device demonstrated good charge–discharge behavior, indicating superior capacitance properties and
efficient ion transport. Thus, the rGO@NiO hybrid nanostructure can be a potential material for supercapacitor
applications.

Item Type: Article
Uncontrolled Keywords: NiO Microwave synthesis Supercapacitor r-GO MWCNTS Hybrid nanostructure ASC device
Divisions: PSG College of Arts and Science > Department of Physics
Depositing User: Dr. B Sivakumar
Date Deposited: 28 Mar 2026 06:42
Last Modified: 28 Mar 2026 06:42
URI: https://ir.psgcas.ac.in/id/eprint/2757

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