ELECTROLYTE FOR AN INEXPENSIVE, ELECTROLYTE-SUPPORTED HIGH-TEMPERATURE FUEL CELL HAVING HIGH POWER AND HIGH MECHANICAL STRENGTH

摘要

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