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. 2020 Oct 27;11:5429. doi: 10.1038/s41467-020-19246-2

Fig. 3. X-ray photoelectron spectroscopy (XPS) characterization of SEI formed in ether-based electrolyte with and without fibroin.

Fig. 3

Li deposition was carried out at a current density of 1 mA cm−2 and a capacity of 1 mAh cm−2 on Cu foil for 10 cycles. a N1s spectra, b C1s spectra, c O1s spectra, and d F1s spectra.