as the cathode . The EIS spectrum was regressed using the fGP-DRT model and a 3×ZARC ECM (the obtained ECM parameters are reported in Table ). The Nyquist plot, recovered DRT with the regressed ECM, and real and imaginary parts of the impedance are displayed in the left panel of Figure . We observe that the DRT from the fGP-DRT and the ECM are consistent and that the fGP-DRT matches closely the experimental impedance.