All simulations were carried out by using the GrainGeo and DiffuDict modules of GeoDict 2023 (Math2Market). Input parameters were taken from experiments whenever possible. Experimental weight percentages were converted to volume percentages by using the values of density from bibliography: 4.78 g cm -3 for NMC and 1.8 g cm -3 for CBD, before considering its internal porosity. The internal porosity of CBD was left as a parameter for fitting, between the values of 0 % and 60 %. Values much larger than this reach the upper limit for which the whole available volume left by the AM backbone is occupied by CBD. The total porosity values were taken from those determined from the electrodes from their volume and the density of their components. For each of these selected electrodes, the corresponding thickness as measured with calipers was set as the z dimension of the simulation box, resulting in the same mass loading as in experiments. Convergence tests were performed by repeating the whole workflow with increasing system size in the x and y dimensions, repeating each condition three times for different random seeds. It was determined that the deviation in final Deff value was consistently below 1 % for systems larger than 150 µm x 150 µm. While this is acceptable, the final system size was set as 200 µm x 200 µm as a safety margin. The selected voxel size was 0.25 µm, which yielded reliable Deff values. No significant difference was observed for lower values.