fig8

Figure 8. (A) Schematic of the coating/doping modification on NFM424. (B and C) Cycling and rate performance of NFM424 and 1 mol% NAP@NFM424 (2.0-4.0 V). (D) HAADF-STEM micrograph of the layered phase. (E) STEM image showing the cross-section of a modified Na_3-3xAl_xPO₄ particle. (E1) Schematic of the Na_3-3xAl_xPO₄ crystal structure. (E2) Interfacial structure diagram. (A-E) Reproduced with permission^[153]. Copyright 2023, American Chemical Society. HAADF-STEM: High-angle annular dark-field scanning transmission electron microscopy; STEM: scanning transmission electron microscopy; NAP: Na_3-3xAl_xPO₄.