Electrolyte materials for solid oxide fuel cells derived from metal complexes: Gadolinia-doped ceria

Abstract

Gadolinia doped ceria (GDC) powers with different gadolinium contents were successfully prepared by the thermal decomposition of ceria complexes. All the calcined power samples were found to be ceria-based solid-solutiond having a fluorite-type structure. the powers were cold-isostatically pressed and sintered in air at 1500 degree Celsius for 5 h to attain a sintered density of about 90% of its theoretical value. The electrical conductivity of the GDC pellets in air was studied as a function of temperature in the 255-700 agree Celsius range, by using two-probe electrochemical impedance spectroscopy measurements…