Journal Article lithium-ion battery Li-Mn-O cathodes Li-ion batteries Li-rich Mn-based oxides Li-rich cathode materials Li-rich cathodes Li‐ion battery Li‐rich Mn‐based oxides Li‐rich NMC O2-type Li-rich compounds T#2‐Li0.69CoO2 configuration entropy expandable fast Li‐ion diffusion network high energy cathode high‐energy‐density local structural adaptability multianionic redox practicability quasi-3D Li-ion diffusion network reversible capacity rhombohedral symmetry segreation layer single‐layer LiCo(Ni)O2 stabilization mechanisms sulfuration superstructure techno‐economic analysis tetrahedra coordination twin structure