Figure 5: Stacked in situ7Li NMR spectra of the SiNW-CFGDL composite obtained during the potentiostatic experiment and enlarged to show the weaker, broader peaks.

The spectra are extracted from the data shown in Figure 4b and plotted from 150 mV on discharge to 430 mV on charge in the first three cycles. The discharge was stopped at 0 V for the (a) 1st and (b) 2nd cycles and (c) 30 mV for the 3rd cycle. P1–3 are assigned to the 7Li environments as explained in the legend to Fig. 4.