fig7

Figure 7. Sodium-storage mechanism of SGHC-8: (A) ex situ Raman spectra during discharge/charge, (B) Raman contour map, (C) selected-area electron diffraction (SAED) pattern of SGHC-8, (D) ex situ XRD patterns collected during discharge/charge within 0.01-2.5 V, and (E) schematic representation of the proposed Na⁺ storage mechanism. XRD: X-ray diffraction.