The methodology reported is schematized in Figure and can be summarized as follows. First, experimental electrodes must be produced, and through different calendering thicknesses, and characterized to obtain a range of porosities values. By assembling symmetric cells with blocking electrolyte, the tortuosity factors of the different electrodes with different porosities are obtained through the analysis of their impedance with a transmission line model appropriate for the experimental system. At this step it is important that the adherence of the electrode with the current collector is as good as possible, otherwise the range of exploitable electrode porosities will be severely reduced due to an excessive contact resistance at low porosities.