Mechanics: As already mentioned, during discharge, both graphite and Si will swell when lithiated, which results in an overall expansion of the electrode (Figure (a)). The swelling of the active material components upon lithiation results in an electrode thickness expansion of 19.23% at 0.1C operation. Meanwhile, at 1C, given that the electrode did not reach its maximum capacity, it only expanded 14.44%. According to Gómez-Cámer et. al. given an AM ratio of 4.75% Si + 90.25% graphite, with CMC/PAA as a binder material, the electrode expands 8.5% in one discharge. Pietsch et. al. reported electrode thickness change data in a discharge with a graphite/Si anode with 20 wt.% of Si. The cell showed around 30% to 40% expansion at the first cycle. Moreover, recently Moon et. al. also reported electrode thickness variations during battery cycling, by considering a 15 wt.% of Si, and also showed an expansion of around 30% to 40%. Considering the 10 wt.% Si content of our model, and no additional degradation mechanisms, such as SEI formation or binder detachment, we think that our results are within a reasonable range.