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

AuthorsAgudosi, Elochukwu Stephen; Abdullah, Ezzat Chan; Numan, Arshid; Khalid, Mohammad; Mubarak, M. S.; Benages-Vilau, Raul; Gómez-Romero, P. CSIC ORCID; Aid, Siti Rahmah; Omar, Nurizan
Binder-free electrode
Energy storage
Issue Date1-Feb-2021
CitationJournal of Electroanalytical Chemistry 882: 114992 (2021)
AbstractIn 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.
Publisher version (URL)
Identifiersdoi: 10.1016/j.jelechem.2021.114992
issn: 1572-6657
Appears in Collections:(CIN2) Artículos

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