Effect of Ceria Content of CeScSZ Powder on the Phase Stability and Electrical Conductivity of SOFC Electrolyte

Abstract

The CeScSZ powders with ceria-doped content were synthesized by the co-precipitation process. The crystal lattice parameter and XRD peak pattern of powders were investigated with the increase of calcination temperature and the change of ceria-doping content at a certain calcination temperature. Moreover, ionic conductivities of the CeScSZ powders were studied in the range of 500 to 900°C. Electrolyte film was fabricated using the synthesized 1Ce10ScSZ powder and single cell of SOFC with anode-supported electrolyte was fabricated by a tape casting and co-sintering process. As a result, the SOFC cell showed power density of 1.2 W/cm 2 at 2 A/cm 2 , 800°C with low ohmic resistance of under 0.1 Ω·cm 2 .