Fig. 4. Estimated specific energy (Eg) and energy density (Ev) values of Si/Si-B/Si-D||IC cells at 25 °C.

A Specific energy and energy density vs. Si fraction for LE-based cells at a fixed areal capacity of 3 mAh cm⁻². B Specific energy and energy density vs. areal capacity for LE-based cells at various Si contents. C Specific energy and energy density for Si||NMC811 cells using various kinds of electrolytes at a fixed areal capacity of 3 mAh cm⁻². D Effect of electrolyte thickness on the specific energy and energy density of Si/Gr (20/80, by wt.)||NMC811 cells at a fixed capacity of 5 mAh cm⁻² (LE liquid electrolyte, PE polymer electrolyte, GE glass electrolyte (LIPON), CE ceramic electrolyte (LLZO)); note that the E_v values for GE and CE overlap in C and D. All the calculation details are in Supporting Tables 3 and 4.