Returning to our graphite/Si composite electrodes, it should be noted that Si is considered to be a challenging material to model, due to its severe volume change and potential hysteresis upon lithiation/delithiation. Many modelling efforts have been done in establishing the connection between the electrochemical and mechanical behavior of Si . Some of these works decouple both phenomena , while others empirically relate the Si potential to its inner mechanical stress . Modeling graphite/Si composite electrodes is even more challenging, and it is currently understudied from a computational perspective. In the work of Sturm et. al. , the electrode is treated as a single empirical phase, where properties such as open-circuit voltage (OCV) and maximum solid lithium concentration are considered as effective parameters.