Credit: Philip Minnmann, Lars Quillman, Simon Burkhardt, Felix H. Richter and Jürgen Janek
Figure 1. Schematic illustration of the measurement setup with electron-blocking (top) and ion-blocking (bottom) electrodes as well as representative impedance
spectra. The corresponding transmission line model used for fitting the impedance spectra measured in these different cases is displayed in a simplified way. The
exact equivalent circuit elements used to model the impedance contributions of electronic (blue), ionic (orange), and interfacial (grey) processes are depicted at
the bottom of the figure. The two resistor elements rel, 1 and rel, 2 in the electronic transport process are attributed to electronic bulk transport and interfacial
charge transfer, respectively.