fig7

Figure 7. (A) Schematic representation of dendrite-free Li anode (inset: NPCN ink screen printed onto polyethylene terephthalate substrate) by designing NPCN-wrapped 3D metal foam. (B) SEM and (C) TEM images of NPCN. (D) Cycling performance of Li/Cu/NPCN|C/S, Li/Cu foam|C/S and Li/Cu foil|C/S full cells of sulfur at 1 C. Reproduced with permission from Ref.^[121] (Copyright 2019, American Chemical Society). NPCN: N-doped porous carbon nanosheets; SEM: scanning electron microscope; TEM: transmission electron microscope.