Compositional Gradient Design of Ni-Rich Co-Poor Cathodes Enhanced Cyclability and Safety in High-Voltage Li-Ion Batteries

, almost equivalent to the state-of-the-art Ni-content 90% cathodes at 2.7-4.3 V. In commercial-grade full cells, a superior cycle life of 80.5% capacity retention is achieved at 1C within 2.7-4.5 V after 1700 cycles, exhibiting promising opportunities in compositional gradient design for Ni-rich cathodes.