Electrical properties of solid oxide fuel cell using magnesia stabilized zirconia films prepared by slurry casting

摘要

Magnesia stabilized zirconia (MSZ) films for solid oxide fuel cell (SOFC) were prepared by the slurry casting method using acrylic polymer solution as binder, and poly ammonium acrylate as dispersant. Electrical properties of MSZ films are studied mainly under the various additive conditions of the MgO, binder and dispersant materials into zirconia. It was found that MSZ film of 200μm, which was prepared by optimum additive quantities of l3mol%MgO, the binder of 1% and the dispersant of 2% intozirconia, had a higher conductivity and lower activation energy at 800~900°C. Furthermore, the SOFC using this film indicated a stable generation property with high cell voltage at operating temperature of 860°C. Then, the cell voltage at a high currentdensity operation was found to be greatly reduced mainly by the resistance polarization of the fuel and air electrodes as compared with that of the MSZ electrolyte.