Electrodeposition of MnPO4·H2O thin film and their characterization as supercapacitor material by potentiodynamic method

• Published in: Journal of energy storage 2022-06, Vol.50, p.104677, Article 104677
• Main Authors: El Mouahid, H., Bou-ouzoukni, Y., Kaichouh, G., Bouziane, K., Zarrouk, A., Guessous, A.
• Format: Article
• Language: English
• Subjects: MnPO4·H2O electrodeposition; Potentiodynamic method; SEM/EDX/XRD/CV/GCD/EIS; Supercapacitor
• ISSN: 2352-152X; 2352-1538
• DOI: 10.1016/j.est.2022.104677

The MnPO4·H2O thin film for supercapacitor applications was prepared by potentiodynamic electrodeposition on a platinum electrode. The morphology and microstructure were examined by scanning electron microscope coupled to an energy dispersive X-ray spectroscopy (SEM/EDX) and X-ray diffraction (XRD) respectively. The electrochemical performance of the films obtained was studied by cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) methods with various electrolytes. Electrical measurements were performed by electrochemical impedance spectroscopy (EIS). The electrochemical results indicate that the MnPO4·H2O thin film in the microsphere form has a high specific capacitance of the order of 213 F g−1 at 5 mV s−1 within a potential window of 0.5 V with 3 M NaOH as electrolyte. •MnPO4·H2O thin film for supercapacitor applications was prepared by potentiodynamic electrodeposition.•Thin film prepared has a monoclinic structure confirmed by XRD analysis.•CV, GCD and EIS tests show that MnPO4·H2O can be used as a supercapacitor electrode.