to the lower BE component (NTFSI,dec-2, yellow), while the total intensity remains about constant. Hence, upon annealing to 450 K the lower BE component, which was related above to a TFSI decomposition product, may contain also contributions from a BMP decomposition product, which resulted from reaction between the BMPdec-1 species (green) and Li. Upon annealing to 500 K, these processes continue and become more pronounced. But still, there are no significant changes in the total N1s intensity. Hence, so far there was no desorption of N-containing species. Here we should note that all spectra recorded after 500 K annealing of the multilayer film show a higher intensity than before and after that measurement, indicating that this is due to a systematic effect of the measurement.