Spray pyrolysed titanium oxide thin films using different ingredients for supercapacitive charaterizations

摘要

Titanium oxide (TiO_2) thin films have been prepared on stainless steel at 673 K using spray pyrolysis technique. Equimolar Aqueous solutions of different ingredients like titanium tri chloride, titanium iso propox-ide, and potassium titanium oxalate were used for the deposition of TiO_2 thin films. As-prepared thin films were characterized using X-ray diffraction, scanning electron microscopy, and Fourier-transform infrared spectroscopy (FT-IR). Prepared samples exhibit tetragonal type crystal structure with dense surface morphology. Electrochemical characterizations were carried out using cyclic voltamme-tery, Galvanostatic chronopotentiometry and electrochemical impedance spectroscopy. TiO_2 thin films of potassium titanium oxalate shows good physical and electrochemical performance, with a high value of specific capacitance 557.50 F/g, Specific energy 20.41 Wh/kg, specific power 28.00 kW/kg and observed internal resistance 0.382 Ω.