Effect of Ceria Content of CeScSZ Powder on the Phase Stability and Electrical Conductivity of SOFC Electrolyte
In this paper, CeScSZ powders with ceria-doped content were synthesized by 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-doped content at a certain calcination temperature. Ionic conductivities of the CeScSZ powders were also studied at the range of 500 ~ 900 °C. In here, the XRD peaks of cubic structure were found only on the ceria-doped powders more than 1 mole% even at the calcination temperature of 1500 °C. Meanwhile, the behaviour of ionic conductivities showed little different characteristics from the XRD pattern, namely, 1 mole% ceria-doped 10ScSZ powder showed the highest conductivity. Therefore, electrolyte film was fabricated by using the synthesized 1Ce10ScSZ powder and single cell of SOFC with anode-supported electrolyte was fabricated by tape casting and co-sintering process. As a result, the SOFC cell showed power density of 1.2 W/cm2 at 2 A/cm2, 800 °C with low ohmic resistance of under 0.1 W·cm2.
 Ju Hee Kang, Young Mi Kim, Ho-Sung Kim, Moo Sung Lee, Jae Hyuk Jang, Jin-Hun Jo “Fabrication characteristics of SOFC single cell using nanocrystalline 1Ce10ScSZ electrolyte powder prepared by co-precipitation process,” J. Full Cell and Technology, 2012, Vol 9, pp. 011015.