Suhasini2026-02-052013Journal of Electroanalytical Chemistry, 2013, 690, , pp. 13-1815726657https://doi.org/10.1016/j.jelechem.2012.11.040https://idr.nitk.ac.in/handle/123456789/26880Manganese dioxide has been considered as a promising material for electrochemical supercapacitors. In order to obtain a high specific capacitance, MnO<inf>2</inf> has been electrodeposited from an aqueous acidic solution of MnSO<inf>4</inf> consisting of an ionic surfactant, namely, sodium lauryl sulphate (SLS) on stainless steel. The electrodeposited films of MnO<inf>2</inf> in the presence of the surfactant possess greater porosity and hence greater surface area in relation to the films prepared in the absence of the surfactant. Cyclic voltammetry and galvanostatic charge-discharge cycling experiments reveal that specific capacitance is higher by about 22% due to the effect of SLS. © 2012 Published by Elsevier B.V.CapacitorsCyclic voltammetryElectrodepositionManganese oxideSodiumAqueous acidic solutionCharge discharge cyclingCharge/dischargeDeposition methodsElectrochemical supercapacitorElectrodeposited filmsGalvanostaticsIonic surfactantsManganese dioxideSpecific capacitanceStainless steel substratesSulphatesSuper capacitorSurface areaSurface active agents