Continuing with the subsequent reactions, we observe that for the case of cEC -a tipping point is reached at an earlier stage due to the termination reactions where the oEC -is either fragmented to the doubly charged carbonate anion CO 2- 3 and C 2 H 4 or a dimerization has taken place where two oEC -are condensed to yield BDC 2-or EDC 2-dimers. In Figure (b) we show the z-density distribution of each molecular species. We can distinguish between two types of profiles; while the two dimer-like end-products show a broad peak around z = 7 nm away from the electrode, lithium carbonate has sharper density distribution with a peak located closer to the electrode. The broad profile of the dimer species is due to the diffusion and migration of the radical cEC -away from the electrode, implying that the dimerization reactions do not only occur near the electrode. On the other hand, the sharper density of lithium carbonate could be explained by its relatively small solubility. Overall the qualitative aspects of the formed layer are in line with the general understanding of a dense inorganic layer at the electrode side and organic compounds at the electrolyte side (see Figure ).