Fig. 4: Nanostructures of the formed SEIs and Li metal protection mechanisms. | Nature Communications

Fig. 4: Nanostructures of the formed SEIs and Li metal protection mechanisms.

From: High-energy and fast-charging lithium metal batteries enabled by tuning Li+-solvation via electron-withdrawing and lithiophobicity functionality

Fig. 4

The cryo-TEM images of the SEIs formed in TMEE-2M (a) and DME-2M (e) electrolytes. b, f Local magnification of the interface between the Li deposit and vacuum (white regions in a and e), highlighting the composition and nanostructure of the SEIs. Regions outlined with light yellow are Li2O nanocrystals. Representative HRTEM images (c, g) and corresponding fast Fourier transform (FFT) patterns (d, h) of the crystalline lattices within the SEI. Schematic illustration of the observed SEIs structures in TMEE-2M (i) and DME-2M (j) electrolytes, and corresponding Li metal protection mechanisms.

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