Unveiling the Over‐Lithiation Behavior of NCM523 Cathode Towards Long‐Life Anode‐Free Li Metal Batteries

NCM523||Cu) achieve outstanding capacity retention of 93.3% after 100 cycles at 0.5 C and 78.5% after 200 cycles at 1 C. The findings establish a research paradigm for designing superior over-lithiated transition metal oxide cathode materials and underscore the critical role of the lithium reservoir in extending the cycle life of AFLMBs.