High energy density lithium-ion (Li-ion) batteries are indispensable for powering electric and hybrid vehicles, next-generation electronics, and power grids. These Li-ion batteries contain high energy density cathodes based on transition metal oxides. Among numerous investigated potential materials, the LiNi1/3Mn1/3Co1/3O2 cathode has been shown to deliver the best performance at a high potential of 4.5 V versus Li/Li+ with high reversible capacity.High energy density lithium-ion (Li-ion) batteries are indispensable for powering electric and hybrid vehicles, next-generation electronics, and power grids. These Li-ion batteries contain high energy density cathodes based on transition metal oxides. Among numerous investigated potential materials, the LiNi1/3Mn1/3Co1/3O2 cathode has been shown to deliver the best performance at a high potential of 4.5 V versus Li/Li+ with high reversible capacity.