The BEs are essentially identical to those of the core level spectra recorded earlier upon deposition of a (sub-)monolayer BMP-TFSI film on pristine graphite (0001) at room temperature (RT) or on a pre-lithiated HOPG substrate at 80 K (see Table ). The observation of identical spectra upon BMP-TFSI deposition on the pristine graphite (0001) at room temperature and on the pre-lithiated graphite (at 80 K) was basis of our previous claim that at 80 K surface segregation of Li dissolved in the bulk of HOPG is kinetically inhibited and that therefore BMP-TFSI adsorbs molecularly intact on the pre-lithiated graphite, without any measurable interaction with (bulk dissolved) Li. Figure : XP spectra recorded (from bottom to top) after RT deposition of a monolayer film of BMP-TFSI on a graphite (0001) substrate, subsequent stepwise deposition of Li (see figure) and finally stepwise annealing to the temperatures indicated. Symbols at the top of the panels represent BEs calculated for adsorbed BMP-TFSI, for adsorbed initial reaction products (see Table ) and for adsorbed binary Li compounds (see legend in the figure and Table ).