Nanoscale Morphological Changes at Lithium Interface, Triggered by the Electrolyte Composition and Electrochemical Cycling

Figure 3

C1s (a), S2p (b), F1s (c), and O1s (d) core-level XPS spectra of the SEI layer of all four samples under investigation (see Table 1). The spectra are recorded after 30 min sputtering with Ar+. The individual components are presented in different colors. The envelope peaks are colored in black. The spectral intensity is presented as received (in counts per seconds, CPS) without further normalizations.

(a)

(b)

(c)

(d)