Fig. 4.

SEM images of top view morphology of the interfacial layer-coated Li foils after extended stripping and plating. Li foil symmetric cells coated with a graphene, b electrospun fiber, c ZnO/CNT, and d CNT, cycled at 1 mA cm^–2 with a capacity of 1 mAh cm⁻² after (a) 210, b 180, c 280, and d 520 cycles. The insets show digital photographs of the corresponding Li foils with interfacial layers after testing. The schematics under each figure show the Li deposition/dendrite growth process. Scale bar, 20 μm for a, 5 μm for b, 200 μm for c, and 2 μm for d