Abstract
In this work, we studied the effect of A-site deficiency and B-site chemical composition on electrical performance of (La0.25Sr0.25Ca0.45)yTi0.95Ni0.05-xMnxO3-δ (x=0-0.05) (y=1, 0.9474) (LSCTNM-x) fuel electrode. The doped compositions were successfully synthesized by the glycine-nitrate combustion method and then characterized by XRD and SEM to confirm the phase purity and visualize the microstructure of studied electrode layers. Furthermore, the DC four-probe conductivity measurements of porous electrode layers has been done to understand the impact of MIEC material composition on electrical conductivities of LSCTNM. Conductivities have been measured at two different atmospheres: 1% H2 + 1.7% H2O + 97.3% Ar and 98.3% H2 + 1.7% H2O. Results of this study demonstrate that the conductivity is considerably dependent on composition and the LSCTNM materials with 10% A-site deficiency showed the maximal total electrical conductivity of porous electrode layers in 98.3% H2 + 1.7% H2O atmosphere.
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