Debunking Common Myths & Misconceptions About NMC Positive Electrode Materials for Li‐ion Batteries

ABSTRACT LiNi x Mn y Co z O 2 (NMC) and LiNi x Co y Al z O 2 (NCA) positive electrode materials for lithium‐ion batteries have existed in the literature for a quarter century, yet myths surrounding many aspects of them abound. In this perspective, four myths are tackled, including the energy density correlation with nickel amount, the (lack of) phase transitions in most high‐nickel materials, the cycle lifetime as compared to LiFePO 4 , and the practical use of lithium‐ and manganese‐rich NMCs as compared to mid‐nickel NMCs. The aim of this perspective is to describe and debunk these myths to better inform the continued development of lithium‐ion batteries.