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Nanocrystalline triple-doped ceria based solid electrolyte materials  (CuxMn0.1-xZr0.1Ce0.8O2, where x = 0, 0.02, 0.04, 0.06, 0.08 and 0.1, as  well as Cu0.08Mn0.02ZryCe0.9-yO2, where y = 0 and 0.1) for intermediate  temperature solid oxide fuel cells were successfully synthesized by  co-precipitation method with sonication and sintered at 1150°C for 4 h in  air. Relative densities of all the samples were above 90-96%. All systems  were characterized by XRD, SEM-EDS and TG-DSC-MS for the investigation of  structure and microstructure with elemental composition. The electrical  conductivity of these materials was measured by AC impedance spectroscopy in  the temperature range of 500-750°C in air. It was shown that  Cu0.08Mn0.02Zr0.1Ce0.8O2 ceramics possessed the maximum conductivity of 8 •  10−3 S/cm at 600°C in air.

Electrical properties of Cu-Mn-Zr co-doped ceria electrolytes for intermediate temperature solid oxide fuel cell application