Voltage-dependent stability of Co-free Li[Ni 0.8 Mn 0.2 ]O 2 and Co-containing Li[Ni 0.8 Co 0.1 Mn 0.1 ]O 2 enabled by W-doping and enhanced oxygen-framework stability

Co-free Ni-rich cathodes preserve oxygen-framework stability at high voltage, while W doping suppresses particle cracking and structural degradation, enabling superior capacity retention over Co-containing counterparts.