fig2

Figure 2. (A) Crystal structure of rhombohedral LiMO₂ (left) and monoclinic Li₂MnO₃ (right)^[37]. (B) HAADF images (i) and intensity profiles (ii) of the two-phase intergrowth and heterointerface along the [001]_rh zone axis direction^[37]. (C) Increasing stacking disorder results in asymmetric peak broadening with no decrease in the peak area ratio between the superstructure peaks and the 001 direction (inset)^[41]. (D) Morphological and structural designs for a delocalized excess Li system for enabling high electrode density and reversibility^[20]. (E) 2D-ordered cation layered structure with coplanar unhybridized O 2p orbitals (left) and 3D-disordered cation framework with a random spatial distribution of unhybridized O 2p orbitals (right)^[49]. (F) Mixing energy predicted from bonding model for the solid-solution LiMO₂ (M = Ni, Co and Mn) phase^[51]. HAADF: High-angle annular dark-field.