fig4

Figure 4. Monofunctional separators with carbon materials, MOF/COF and polymers for Li-S batteries. (A) SEM and TEM images of PCN. (B) Schematic of Li-S cells with GO-coated separator. (C) Fabrication process of batteries with CPC separators. (D) Schematic illustrations of Li-S cells with TB-BAA/SWCNT/PP separators. This figure is quoted with permission from Liu et al.^[56], Jiang et al.^[62], Zhang et al.^[67], and Sun et al.^[69], respectively.