Facile room temperature synthesis of CoOOH for high-performance supercapacitor application: comparison with other metal oxyhydroxides (MOOH; M = Al, Mn or Fe)

• Published in: Journal of solid state electrochemistry 2024-07, Vol.28 (7), p.2071-2079
• Main Authors: Paunkumar, Ponnusamy, Sasmal, Ananta, Nayak, Arpan Kumar, Babu, Sundaram Ganesh
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Aqueous electrolytes; Capacitance; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Cobalt oxyhydroxide; Condensed Matter Physics; Electrochemical impedance spectroscopy; Electrochemistry; Electrodes; Energy Storage; Fourier transforms; Infrared spectroscopy; Iron; Manganese; Original Paper; Physical Chemistry; Room temperature; Supercapacitors; Synthesis
• ISSN: 1432-8488; 1433-0768
• DOI: 10.1007/s10008-023-05741-1

In this study, a facile synthesis of Cobalt oxyhydroxide (CoOOH) via the co-precipitation method at room temperature under vigorous stirring and compared the supercapacitor performance with that of manganese, aluminum, and iron oxyhydroxides. The prepared materials were confirmed by X-ray Diffraction (XRD), and Fourier Transform-Infrared Spectroscopy (FT-IR). The structural and surface area were investigated by Scanning Electron Microscopy (SEM), and Bruner-Emmert-Teller (BET) analyses. These materials were examined for their capacitance performance by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS) in 1 M KOH aqueous electrolyte solution. Among these oxyhydroxides, CoOOH showed excellent capacitance than other oxyhydroxides. The CoOOH electrode exhibits a specific capacitance of 1096 F g − 1 at 25 mV s − 1 and 670 F g − 1 at 1 A g − 1 current density found from CV and GCD, respectively. Furthermore, the CoOOH electrode was investigated for cyclic stability and exhibited 91% capacitance retention after 5000 cycles. Graphical Abstract