In this work, La0.6Sr0.4Co0.8Fe0.2O3-δ - Ce0.9Gd0.1O1.95 (LSCF-GDC) nano-composite cathodes (NCCs) with different LSCF loading levels have been made by the infiltration method. The polarization resistance RP has been characterized by Electrochemical Impedance Spectroscopy, which decreases with the LSCF loading level. The Simple Infiltration Microstructure Polarization Loss Estimation (SIMPLE) model has been used to predict the LSCF-GDC cathodes behavior. The model fits agree within 73% at all temperatures as RP ranges over five orders of magnitude without using fitting parameter. The SIMPLE model has also been validated by fitting the literature existing NCCs produced in the literature, and the SIMPLE model calculated RP agree to within 137% at all tested temperatures and compositions without the use of fitting parameters as the RP varies over four orders of magnitude. The SIMPLE model has also been used to predict the RP change with materials' properties and cathode microstructure. Artificially lowering the oxygen surface exchange resistance of the to one order of magnitude less than Sm0.5Sr0.5CoO3-δ and artificially increasing the ionic conductor ionic conductivity to one order of magnitude greater than Ce0.9Gd0.1O1.95 results in a decrease of the solid oxide fuel cell's operation temperature by ~100 oC.
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