For each material injection scenario, the average over 30-70 M 𝛥𝑡 of tortuosity factor, effective diffusivity and electrical conductivity. Table summarizes the average values over the simulation times 𝑡 = 30 -70 𝑀 𝛥𝑡 of the tortuosity factor, effective diffusivity, and electrical conductivity of these eight simulations. These parameters are used to describe the microstructural features of the filaments. It is important to notice that we do not intend here to use these properties to capture the efficiency in the transport of lithium ions and electrons in the final battery electrode. The latter originates from using the extruder-produced filament in the 3D printing process afterwards, and in order to be rigorous in concluding about the material distribution impact on electrochemical performance descriptors (e.g. charge and discharge kinetics, capacity utilization) we would need to consider also the simulation of the 3D process, something that it is out of scope of the work reported in this article. Nevertheless, our modeling tool allows determining a filament formulation F1, which offers the lowest tortuosity factor and the highest effective diffusivity, that, based on the discussion above, needs to be considered with caution while intending to extrapolate to its implications in terms of the final electrode electrochemical performance. In simulations with two types of particles, as here, higher porosity means more voids which will give lower tortuosity factor, but it also means fewer particle-particle connections, which will reduce electrical conductivity. This is contrary to experimental filament measurements , where the highest electronic conductivity was found for the filament F1. This discrepancy may be due to the fact that our model assumes that carbon nanofibers are uniformly distributed within BC particles, whereas in carbon nanofibers tend to be more complexly distributed. In other words, our model lacks of spatial resolution to capture carbon nanofibers orientations that can contribute at enhancing the electronic conductivity.