Abstract
A nano-structured La 0.8Sr 0.2Co 0.5Fe 0.5O 3 + Y 2O 3 doped ZrO 2 (LSCF + YSZ) composite cathode was prepared by impregnation of a LSCF-containing solution into porous YSZ structure presintered on the YSZ electrolyte. The result shows that the LSCF phase was formed at 700 °C, forming a nano-structured, effective and functional LSCF + YSZ composite cathode that not only produces high triple phase boundaries for the O 2 reduction reaction, but also provides a structurally stable interface between the LSCF and YSZ. The electrode polarization resistance for the O 2 reduction reaction is from 0.539 to 0.047 Ω cm 2 between 600 and 750 °C, indicating the promising potential the LSCF + YSZ as a high performance cathode for intermediate temperature solid oxide fuel cells.
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