Building the Stable Oxygen Framework in High‐Ni Layered Oxide Cathode for High‐Energy‐Density Li‐Ion Batteries

High-Ni layered oxide cathodes hold a great promise for fabricating high-energy lithium-ion batteries. However, the oxygen evolution during cycling is crucial factor in structure deterioration, potential change, and capacity decay of cathodes, limiting commercial application high-Ni (Ni > 0.9) oxides Herein, we demonstrate feasible approach to enhance stability framework, through surface immobilization with yttrium bulk stabilization aluminum oxides. As expected, benefiting from oxygen-stabilized interfacial parasitic reaction are mitigated obviously battery operation, along improved thermal cathode. Correspondingly, as-prepared delivers high reversible capacity, impressive cycle ability, low polarization upon cycling. Such significant improvement on electrochemical performance primarily attributed strong affinities both at layer bulk, which synergistically stabilizes framework via raising energy barrier evolution. Therefore, building stable critical enhancing density output, cathodes.