fig7

Figure 7. Functional separators with catalytic transition metal compounds for shuttle effect inhibition. (A) Cyclic-voltammetry profiles of Fe₃C-N-rGO coated separator and TEM image of Fe₃C-N-rGO. (B) Schematic illustration of Mo₂N@NCNS. (C) Preparation schematic diagram of g-C₃N₄@MQDs. (D) In situ Raman spectra in discharging processes of the cells with TiB₂/PP separators. (E) Long life cycle performance and Coulombic efficiency at 5C Li-S cells with Co₂B@CNT-separator. This figure is quoted with permission from Pan et al.^[89], Ma et al.^[91], Yang et al.^[41], Li et al.^[93], and Guan et al.^[94], respectively.