Structural, Spectroscopic and Electrical Characterization of Strontium doped Lanthanum Cobaltite (LSC) as Cathode for SOFC

Abstract

Abstract Lanthanum Strontium Cobaltite (LSC) thin films with 0.1, 0.2, 0.3, and 0.4 mol % strontium were synthesized by spray pyrolysis technique (SPT). These thin films were sintered at 1100 ℃ and structural characterization has been studied by XRD for confirmation of phase and to find the crystalline size. By using FESEM surface morphological analysis was done to calculate grain size. Elemental analyses were done by EDAX. The morphological structure was studied by AFM and it was found uniform and spongy morphology of LSC thin films. At different positions, FWHM was calculated by using Micro Raman spectroscopy. The surface properties of the thin film were studied by XPS. The D. C. electrical resistivity and dielectric constant were measured with a variation of temperature, and it exhibited semiconducting behavior. Impedance study of LSC samples was studied and it was found that space charge polarization occurs in the samples.