Preparation and Characterization of Solid Electrolyte for It-Sofc Applications Using Atmospheric Plasma Spray Technique: An Inside Understanding by Pas Analysis and Molecular Dynamic Simulation

The zirconia-based solid electrolyte doped with various components of dopant was prepared using the atmospheric plasma spray (APS) system for the intermediate temperature solid oxide fuel cell (IT-SOFC) applications. The influence of spray parameters on the in-flight particle was analyzed by the Spray Watch diagnostic system for obtaining the optimized preparation conditions. The surface morphology, phase composition, ohmic resistance, ionic conductivity and activation energy were characterized using field emission scanning electronic microscopy (FE-SEM), X-ray diffraction (XRD) and AC impedance spectroscopy. For the further insight understanding, the positron annihilation spectroscopy (PAS) and molecular dynamic (MD) technique were adopted to analyzed the micro-defect and ionic transport mechanism in a microscopic scale.