But for the negative electrode, as long as the Fermi level is below the LUMO of the electrolyte, electron transfer is prevented, and the electrolyte remains stable. Unfortunately, it has been seen that once the negative electrode has been lithiated (battery charged), a majority of them have shown a Fermi level that is above the LUMO of the electrolyte. At this point, one would think that this would lead to the reduction of the electrolyte.