Ultrafine GDC electrolyte slurries for intermediate temperatures microtubular SOFC applications

Gd-doped CeO₂ (GDC) slurries were processed by wet atomizing system for intermediate temperatures microtubular solid oxide fuel cell (SOFC) applications. The SOFC was fabricated using supporting porous anode tubes of NiO and GDC, and the cathode consisted of La₆Sr₄Co₂Fe₈O_3-y. The SOFC was tested with humidified (3% H₂O) hydrogen as fuel and the static air as oxidant, and the tubular cell maintained its high performance even at 500°C. The results showed a comparable performance even processed with decreasing co-sintering temperature from 1350° to 1250°C. The open circuit voltage of the cell under conditions of 3% 1120/97% H₂ fuel and air was ∼ 0.85 v at 500°C, which is lower than using ceria-based electrolyte. This is an abstract of a paper presented at the 20th Annual Saudi-Japan Symposium on Catalysts in Petroleum Refining and Petrochemicals (Dharan, Saudi Arabia 12/5-6/2010).