The analysis of the model also reveals less obvious contributions. Figure indicates that no clear relationships can be inferred between surface areas or void fractions and the diffusion coefficient. These factors played a more secondary role, slightly adjusting the obtained values with contributions of the order of 0.2. For instance, the model identifies a positive relation between the void fraction and the contribution to the diffusion coefficient, which aligns with the physical understanding that lower void fractions correspond to lower diffusion rates within the material, assuming other parameters are equal. Conversely, larger surface areas imply more interaction with the pore walls, which slows down the diffusion of particles.