Research Article

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

Table 1

Binding energy (BE) positions (eV) of the C-, S-, O-, and F-containing species from XPS spectra of a SEI layer formed after spontaneous passivation in DOL/TEGDME (7 : 3) and (i) 1 M Li[TFSI]; (ii) 1 M Li[TFSI] with LiNO3; (iii) 1 M Li[TFSI] with polysulfides; and (iv) 1 M Li[TFSI] with polysulfides and LiNO3, after sputtering (corresponding to Figure 3).

Chemical elementChemical stateBE (eV)

CLi-C282.0
C-C285.0
C=O287.0
COR288.4
O-C-O/COOR290.0
-CF3292.8

SLi2S160.0
Li2S2161.8
SxOy (2 ≤ x ≤ 8, 0 ≤ y ≤ 6)162.5–164.5
167.0
169.0

OLi2O528.3
S=O531.0
C=O531.6
O-C-O/COOR533.1

FLiF685.0
CF3688.5