Optimisation of NiO electrodeposition on 3D graphene electrode for electrochemical energy storage using response surface methodology

Agudosi, Elochukwu Stephen and Abdullah, Ezzat Chan and Numan, Arshid and Khalid, Mohamad Sukeri and Mubarak, Nabisab Mujawar and Benages-Vilau, Raú and Gómez-Romero, Pedro and Aid, Siti Rahmah and Omar, Nurizan (2021) Optimisation of NiO electrodeposition on 3D graphene electrode for electrochemical energy storage using response surface methodology. Journal of Electroanalytical Chemistry.

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Abstract

In this study, NiO was electrodeposited on a 3D graphene electrode to produce a nanocomposite with enhanced electrochemical properties. The electrodeposition process parameters such as electrolyte concentration, deposition time, and deposition potential were statistically optimised using response surface methodology. The statistical analysis showed that the optimal electrodeposition conditions to be 0.3 M, 10 min, and -1.2 V for electrolyte concentration, deposition time, and deposition potential, respectively. Furthermore, the predicted model and experimental results for the specific capacity of G-NiO were determined to be 240.91 C/g and 240.58 C/g at 3 mV/s. The results show that the electrochemical deposition technique can be employed as a fast and reliable synthesis route to develop graphene-based metal oxide nanocomposites. The structural and morphological properties were determined by XRD and FESEM studies. The electrochemical measurements revealed the excellent electrochemical performance of 3D graphene NiO composite (G-NiO) for energy storage applications.

Item Type:	Article
Uncontrolled Keywords:	Optimization ANOVA Electrodeposition NiO Binder-free electrode Energy storage
Subjects:	T Technology > TP Chemical technology
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	nwokealisi
Date Deposited:	26 Oct 2023 11:51
Last Modified:	26 Oct 2023 11:51
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/17440

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