We analyzed data from a symmetric cell featuring Ba0.95La0.05FeO3- (BLF) as the electrode materials and a samarium-doped ceria as the electrolyte. The cell was operated at 550 °C in an N2/O2 atmosphere under varying oxygen partial pressures (pO2 = 21, 40, 60, 80, and 100%). EIS data were collected across the frequency range 100 mHz to 20 kHz with five points recorded per decade. The data were regressed using 2×ZARC ECM, with the parameters provided in Table .