Porosity Control of LSM/YSZ Cathode Coating Deposited by Electrospraying
Résumé
The deposition of a composite electrode, which consisted of a mixture of a solid electrolyte (YSZ) and an electrocatalytic material (LSM), on an YSZ substrate was studied using the electrostatic spray deposition (ESD) technique. Films with various morphologies were obtained. The surface morphology was strongly influenced by the deposition temperature, precursor solution flow rate, and nozzle to substrate distance as a function of the nature of precursor solution. Processes involved in the porous film formation were discussed. Powder X-ray diffraction analysis showed that only the LSM hexagonal phase and the cubic YSZ phase were formed in the LSM/YSZ composite cathode after thermal treatment at 800 °C.