Figure 4: Characterization of SEI layers formed in different electrolytes.
From: The synergetic effect of lithium polysulfide and lithium nitrate to prevent lithium dendrite growth
SEM images of the SEI layers formed in the electrolyte (a) with the addition of only LiNO3 (5 wt%) and (b) with the addition of both Li2S8 (0.18 M) and LiNO3 (5 wt%) after ten cycles (scale bars, 10 μm). X-ray photoelectron spectroscopy (XPS) analysis of the SEI layers, C1s, S2p and F1s spectra are presented, including peak deconvolution and assignments. (c–e) XPS spectra of the SEI layer shown in a. (f–h) XPS spectra of the SEI layer shown in b. PS, lithium polysulfide (Li2S8).
