ELECTROLYTE FOR COST-EFFECTIVE, ELECTROLYTE-SUPPORTED HIGH-TEMPERATURE FUEL CELL HAVING HIGH PERFORMANCE AND HIGH MECHANICAL STRENGTH

摘要

An electrolyte for an electrolyte-supported fuel cell having high power and a high mechanical strength, which comprises essentially a zirconium(IV) oxide (= ZrO2) doped with ytterbium(III) oxide (= Yb2O3), where the proportion of ytterbium(III) oxide is 3.5-6.5 mol%, based on the zirconium(IV) oxide, and the thermal expansion coefficient of the electrolyte material at 800°C is in the range from 10.6*10-6 K-1 to 11.1*10-6 K-1, is provided.