Synthesis and Characterization of La[sub 0.6]Sr[sub 0.4]Co[sub 0.2]Fe[sub 0.8]O[sub 3−δ] and Ba[sub 0.5]Sr[sub 0.5]Co[sub 0.8]Fe[sub 0.2]O[sub 3−δ]

This study compares the electrical transport and the oxygen exchange properties of two mixed conducting materials between 600 and , namely (LSCF) and (BSCF). Both materials were synthesized by spray pyrolysis and characterized by the electrical conductivity relaxation technique. LSCF has the higher electrical conductivity ( between 450 and ), while BSCF shows faster oxygen exchange kinetics and diffusion. The expansion of both materials between 600 and ( , below up to at ) does not match with the common electrolytes for solid oxide fuel cells.