Low temperature processed composite cathodes for Solid-oxide fuel Cells

Low temperature processed composite cathodes for solid-state fuel cell (SOFC) have been developed, consisting of La0.6Sr0.4Ti0.1Fe0.9O3 and Ag, as low as 800 °C process temperature. Using micro-tubular design, the performances of the cathodes have been investigated at the operating temperatures of 650 and 700 °C. The cell consists of NiO–Y stabilized zirconia (YSZ) as an anode (support tube), Sc stabilized zirconia (ScSZ) as an electrolyte, Gd doped ceria (GDC) for an inter-layer between the electrolyte and the cathodes. The single performance has varied depending upon the types of cathodes, and the composite cathode with 50 wt% La0.6Sr0.4Ti0.1Fe0.9O3 and 50 wt% Ag has shown comparable performance to the cell with standard LSCF–GDC cathode.

► Development of new composite cathodes consisting of Ag and La0.6Sr0.4Ti0.1Fe0.9O3. ► Sintering temperature of the new cathode is as low as 800 °C ► Comparable performance for the cell with the composite cathodes. ► One of ideal cathodes for low temperature SOFC below 700 °C.