Different material formulations are used to design various model particle properties, which in turn have different effects on the microstructure of the extruded filament. Particles with a lower Young modulus lead to less porous filament microstructures. It should be noted that we still need to ensure that the mechanical properties of the filaments meet the requirements of the subsequent 3D printing of the electrode. It should also be added that in this 3D printing process, the filament partially melts in the printing nozzle at a specific temperature, which could imply a further reorganization of the particles' distribution in the printed electrode. The exploration of these aspects cannot be done by the model presented in this article, due to its specific design to simulate extrusion processes.