Concerning the mechanical behavior of the composite electrodes, most of the studies are done at the experimental level, focusing mainly on macroscopic observables such as the thickness change of the electrode upon lithiation . As a result, the influence of Si volume expansion on the composite electrode microstructure still lacks investigation, and this is especially true in modelling, where the 3D location of each electrode component should be resolved explicitly due to the tight link between degradation mechanisms and microstructure.