Electrochemical supercapacitive performance of Hematite α-Fe2O3 thin films prepared by spray pyrolysis from non-aqueous medium

Publication date: 1 October 2016
Source:Thin Solid Films, Volume 616
Author(s): Abhijit A. Yadav, T.B. Deshmukh, R.V. Deshmukh, D.D. Patil, U.J. Chavan
In present work, we report the electrochemical supercapacitor performance Hematite α-Fe2O3 thin films prepared by spray pyrolysis from non-aqueous medium. The structural, morphological optical and electrochemical properties of the α-Fe2O3 thin films are studied. The α-Fe2O3 has shown Rhombohedral (Hematite) crystal structure. Scanning electron microscopy results reveal that the α-Fe2O3 thin films have well covered nanoporous surface. The as prepared films exhibited a direct band gap energy varying from 2.36 to 2.14eV. The α-Fe2O3 thin films showed a maximum specific capacitance 451Fg⁻¹ within potential window −1.1 to 0.2V in aqueous 2M KOH electrolyte. Further, α-Fe2O3 electrode based supercapacitor showed 1.3V wide voltage window with specific energy and specific power of 45Whkg⁻¹and 1.25kWkg⁻¹ at 4Ag⁻¹ respectively. Such nanoporous α-Fe2O3 thin film with high performance may be used as a promising material for electrochemical supercapacitors.