The total intensity of the O1s peaks remains constant. Hence, there is no desorption of Ocontaining species during Li post-deposition at RT. Upon annealing to 400 K, there are no significant changes, except for the disappearance of the low-BE peak. Also further annealing to 450 K and 500 K has no significant effect on the composition of the high-BE peak, and the low-BE peak remains absent. Only upon annealing to 650 K we find a significant loss of total O1s intensity by about 60%. The intensity ratio in the two components remains, however, about constant. Finally, upon annealing to 700 K, most of the O1s intensity is lost. The slight down-shift in BE seems to indicate that the remaining intensity is solely due to the lower-BE component (blue-yellow) in the combined OTFSI+Li/OTFSI,dec-1 peak. The comparable trend in the relative loss of intensity in the N1s and O1s peaks is most simply explained by desorption of both N-and O-containing species.