Upon annealing to 400 K, the BMP-related NBMP+Li peak (red) is no longer detected. Hence, at this point the molecular BMP-like species were fully converted to the BMPdec-1 species, and accordingly the peak at 400.5 eV increased slightly in intensity. Also one of the TFSI decomposition products (TFSIdec-1, blue-yellow) disappeared. Nevertheless, the total N1s intensity remained about constant, indicating that formation of volatile reaction products is still small at this point. This is different from the monolayer case, where the loss in N1s intensity due to desorption was considerable after similar treatment. Upon annealing to 450 K, there seems to be a slight intensity transfer from the higher BE component (NBMP,dec-1, green)