Today, much of the focus is now being given to composite electrodes made of graphite and nanosized Si (n-Si) , where graphite acts as an electrochemically active and mechanically stable framework to buffer the volume expansion of the n-Si particles. Such approach essentially relies on a compromise between cycling stability, provided by graphite, and higher specific capacities, provided by Si. Composite electrodes with low n-Si content (< 25 wt.%) are of particular interest, since they potentially enable manufacturing processes that are compatible with the current LIBs, while significantly increasing their specific capacity, when compared to graphite only electrodes . For instance, as few as 10 wt.% of Si could, theoretically, contribute to approximately half of the electrode's capacity. Still, similar to electrodes made of Si only, the huge volume of expansion of the n-Si particles results in composite electrodes that, to some extent, also suffer from pretty significant microstructural changes. These changes result in electrode thickness variations , loss of electrical particle contact within the microstructure , continued consumption of electrolyte , all of which affects the electrode's electrochemical performance . All those phenomena depend on the exact particles location along the electrode, where the heterogeneous distribution of electrode components in 3D becomes important when trying to understand the coupled mechanical and electrochemical behavior of graphite/Si composite electrodes .