Electrochemical supercapacitive performance of spray deposited NiSnO3 thin films

Abstract Mixed transition metal oxides with hierarchical and porous structures are considered to be the promising electrodes for high-performance supercapacitors. Nickel-Tin-Oxide (NiSnO 3 ) thin films are deposited by spray pyrolysis for electrochemical supercapacitors. These films are characterized by X-ray diffraction (XRD), scanning electron microscopy and UV–Vis spectrophotometer. XRD patterns confirm formation of Perovskite NiSnO 3 . NiSnO 3 thin films show flake and spongy type of morphology. The band gap energy is found to be in the range of 3.31–3.56 eV. The pseudocapacitive behavior of NiSnO 3 electrodes has been investigated through cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy (EIS) measurements in 2 M aqueous KOH. NiSnO 3 electrode shows maximum specific capacitance of 386 F g − 1 at scan rate  20 mV s − 1 . Further, 92.63% retention in specific capacitance is observed after 1000 charge/discharge cycles. EIS study reveals low solution and charge transfer resistance. These features make NiSnO 3 electrode attractive for high-performance supercapacitors.