Dual‐strategy modification on P2‐Na0.67Ni0.33Mn0.67O2 realizes stable high‐voltage cathode and high energy density full cell for sodium‐ion batteries

A dual strategy of Mg2+ doping integrated with ZrO2 surface modification is applied on P2-Na0.67Ni0.33Mn0.67O2 to optimize its electrochemical performance. The damaged P2–O2 phase transition as well as side reactions between cathode and electrolyte are both suppressed after dual-strategy modification, thus realizing stable high-voltage cathode and high energy density full cell for sodium ion batteries.