In the present study, iron oxide (α-Fe2O3) thin films with good adhesion on stainless steel substrates are deposited by liquid phase deposition (LPD) technique, which is additive and binder-free. Iron oxyhydroxide (FeOOH) thin films are formed by means of a ligand-exchange equilibrium reaction of metal-fluoro complex ions and an F−ions consuming reaction by using boric acid (H3BO3) as a scavenging agent. These films are annealed at 500 °C to get α-Fe2O3 thin films. The transformation from hydrophobic to hydrophilic nature of the films is observed due to annealing. The films are characterized by different techniques. The α-Fe2O3 film is checked for electrochemical supercapacitive performance in Na2SO3 solutions of various concentrations. Specific capacitance is calculated from cyclic voltammetry at numerous scan rates (5–200) mV s−1. The highest obtained value of specific capacitance is 582 F g−1 at 5 mV s−1 for 0.5 M Na2SO3 electrolyte. The maximum values of specific power and specific energy are 6.9 and 53.4 Wh kg−1 from the charge-discharge curve at the current density 2 mA cm−2 in 0.5 M Na2SO3 electrolyte.
Journal of Solid State Electrochemistry – Springer Journals
Published: Nov 12, 2016
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