Fig. 4: The composition and 3D nanostructure of SEI.
From: Thermoresponsive ether-based electrolyte for wide temperature operating lithium metal batteries
a, b C 1 s, F 1 s and Li 1 s spectra of SEI in TO- (a) and THF-based (b) electrolytes at the sputtering times of 0, 25, and 50 s. c Relative compositions of Li-containing and C-containing species in SEI formed in designed electrolytes. d Depth sputtering profiles and 3D renders of the Li SEI in Li||Li cells with TO-based electrolytes. Normalized intensity is obtained through 1000/(intensity) conversion. e, f Cryo-TEM images of deposited Li in the cell with TO- (e) and THF-based (f) electrolytes.
