the charge profiles of coin cells under three
fabrication conditions: no SLMP prelithiation (red), SLMP dropcast
onto the Si-CNT anode (black), and pressure-activated SLMP
(p-SLMP, blue). The charge profiles for drop-cast SLMP and
anodes without SLMP show a pronounced sloping voltage plateau
during the first 0.5 mAh of charge, which is attributed to SEI
formation on the silicon and CNT current collector. As mentioned
previously, the SEI formation will cause irreversible capacity loss,
and the presence of such a voltage plateau indicates that an Si-CNT
anode has not been properly prelithiated. When an Si-CNT has
been properly prelithiated, the voltage profile from SEI formation is
not present, as shown for the p-SLMP (blue) in Figure 5a.