Bond formation and breakage is crucial upon energy storage in lithium transition metal oxides (Li Me O 2 , = Ni, Co, Mn), i.e. the conventional cathode materials Li ion batteries. Near-edge X-ray absorption finestructure spectroscopy (NEXAFS) of L K edge performed first discharge LiNi x Co (1?x)/2 Mn ( 0.33: NCM111, 0.6: NCM622, 0.8: NCM811) combination with charge transfer multiplet (CTM) calc...