Structural Stabilization of 4.6 V LiCoO2 Through Tri‐Site Co‐Doping with Al‐Mg‐F

). Al, Mg, and F are doped at three distinct lattice sites, and the contributions of each dopant are investigated using advanced synchrotron X-ray analyses and electron microscopies. Al and Mg delay the detrimental transition to the H1-3 phase and facilitate a smoother phase transition, thereby preserving particle robustness. The electronegative anion dopant F mitigates oxygen oxidation and ensures a wider range of transition metal redox reactions. These enhancements enable the particles to withstand numerous cycles without severe cracking or surface degradation, thereby significantly improving cyclability. Consequently, the tri-site doping strategy effectively minimizes capacity sacrifice and bolsters battery performance, with every dopant functioning synergistically.