Annealing optimization of graphitized Co3O4@CuO@NiO composite electrodes for supercapacitor applications. Issue 5 (23rd May 2022)

• Record Type: Journal Article
• Authors: Obodo, Raphael M.; Mbam, Sylvester M.; Iwueke, David C.; Ramzan, Muhamed; Ijeh, Rufus; Ahmad, Ishaq; Maaza, Maalik; Ezema, Fabian I.
• Is Part Of: Energy storage. Volume 4:Issue 5(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-05-23
• Subjects: annealing -- electrode -- graphene oxide -- hydrothermal -- supercapacitor; Energy storage -- Periodicals; Energy storage; Periodicals; 621.04205
• DOI: 10.1002/est2.347
• Languages: English
• ISSNs: 2578-4862

Abstract

Abstract: In recent times, carbon‐based material has received a keen interest in the fabrication of electrodes because it enhances the performance of energy storage devices. Amalgamated composites of three transition metals (Co3 O4 @CuO@NiO) and graphene oxide (GO) were fabricated employing the hydrothermal method. The performance of some fabricated electrodes was optimized by annealing using various temperatures, examined for supercapacitor application using a three‐electrode system. Our results indicate that Co3 O4 @CuO@NiO‐amalgamated electrode optimized using 100°C temperature shows enhanced features compared to deposited and other samples annealed at various temperatures. These discoveries also showed that Co3 O4 @CuO@NiO‐amalgamated electrode optimized using 100°C temperature delivered a specific capacitance of 1312 F/g from cyclic voltammetry analysis using 10.0 mV/s scan rate and 1258 F/g from galvanostatic charge–discharge analysis using 1.0 A/g current density. The cycling stability of electrodes annealed at 100°C was 92.5% after 10 000 cycles, indicating that annealing at 100°C enriched electrode characteristics. Abstract : Graphical Abstract