fig5

Figure 5. (A) Li-ion transport along the b-axis in LiFePO₄, where the curved trajectories are shown as red arrows, the iron octahedra are orange, the phosphate tetrahedra are blue and lithium ions are green. Copyright from Ref.^[34]. (B) Schematic of SNO electrolyte working principle in a CFC (left) and the electronic structure of the Ni 3d orbitals of SNO (right). Copyright from Ref.^[37]. (C) Hydrogen and lithium dopants for migration pathway (left) along [001] direction in SmNiO₃ and its activation energy (right). Copyright from Ref.^[38].