Electrochemical supercapacitive properties of SILAR-Deposited Mn3O4 electrodes. (December 2018)

• Record Type: Journal Article
• Authors: Nwankwo, M.C.; Nwanya, A.C.; Agbogu, A.; Ekwealor, A.B.C.; Ejikeme, Paul M.; Bucher, R.; Osuji, R.U.; Maaza, M.; Ezema, Fabian I.
• Is Part Of: Vacuum. Volume 158(2018)
• Page Start: 206
• Page End: 214
• Publication Date: 2018-12
• Subjects: Mn3O4 thin film -- SILAR -- Optical properties -- Potentiostatic charge-discharge -- Electrochemical impedance spectroscopy; Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2018.09.057
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: In this study, successive ionic layer adsorption and reactions (SILAR), a simple and cost-effective method was used to successfully synthesize Mn3 O4 thin film electrodes on fluorine-doped tin oxide (FTO) and stainless steel (ss) substrates. The synthesized films were characterized using scanning electron microscopy (SEM), X-Ray diffraction (XRD) and UV–vis–NIR spectroscopy. The electrochemical energy storage behavior of the electrodes was evaluated using cyclic voltammetery (CV), potentiostatic charge-discharge (c-d) technique and electrochemical impedance spectroscopy (EIS) in 1M solution of Na2 SO4 electrolyte. The highest specific capacitance of 786.2Fg -1 was obtained at a scan rate of 5 mVs −1 for the 80-cycle film electrode. The SILAR deposited Mn3 O4 thin film electrodes is a promising material for pseudocapacitor application based on the electrochemical properties obtained. Highlights: Body-centered tetragonal Hausmannite Mn3 O4 thin films were deposited by SILAR method. The highest Csp obtained was 786.2Fg -1 in 1M Na2 SO4 electrolyte. The deposited thin films show good supercapacitor behaviour.