Silicon has garnered significant interest as an anode material in lithium-ion batteries due to its high practical capacity of around 3579 mAh.g-1 at Li15Si4 phase.[1] However, its notable volume expansion of approximately 300% in a fully intercalated state leads to particle pulverization, the dynamic formation of a solid electrolyte interface (SEI), and a subsequent loss of electrical contact and capacity. [2] Solutions to address this issue include utilizing silicon composites instead of pure silicon, [3,4] employing partial lithiation or delithiation processes,[5] and optimizing external pressure to enhance electrical particle contact.[6] The objective of this study is to investigate the electrochemical performance and dilatometry behavior of multilayer pouch cells (single to 27 layer) under external mechanical pressure. By employing one-third of the silicon capacity to stabilize the electrochemical performance of 70% silicon-content anodes, the 5-stacked layer cell under 0.04 MPa exhibited an irreversible expansion of approximately 5% after three cycles of formation at 0.1C, and a total thickening of 14% after 200 cycles at 0.5C. SEM images emphasizes the milling process of silicon.