Fuel Cells Using Transient Physical Models Simulation of Electrochemical Impedance Spectra of Solid Oxide

A general electrochemical impedance spectroscopy EIS modeling approach by directly solving a one-dimensional transientmodel based on physical conservation laws was applied for simulating EIS spectra of an anode-supported solid oxide fuel cellSOFC button cell consisting of Ni–yttria-stabilized zirconia Ni–scandia-stabilized zirconia ScSZScSZlanthanum strontiummanganate LSM–ScSZ multiple layers. The transient SOFC model has been solved for imposed sinusoidal voltage perturbationsat different frequencies. The results have then been transformed into EIS spectra. Six parameters had to be tuned three for thecathode and three for the anode and have been estimated using data from a symmetric cathode cell and from a button cell. Theexperimental and simulated EIS spectra were in good agreement for a range of temperatures 750–850°C , of feed compositionsmixture of H