Fig. 7 | Nature Communications

Fig. 7

From: Lithiophilic-lithiophobic gradient interfacial layer for a highly stable lithium metal anode

Fig. 7

Well-confined stripping and plating behavior of the GZCNT-coated Li foil. ah SEM images with various magnifications of cross-sectional view morphology of the Li cells coated with a CNT (ad) or GZCNT (eh) interfacial layer and cycled at a current density of 1 mA cm–2 with a stripping/plating capacity of 1 mAh cm–2 after 520 cycles. i, j Li stripping/plating mechanism of Li foils coated with a i CNT and j GZCNT interfacial layer where, after extended stripping/plating, a mossy Li layer forms between the CNT layer and Li foil (i), while the Li deposits nucleate at the surface of the underlying lithiophilic part of GZCNT, leading to a tightly anchored Li/CNT interface while the upper lithiophobic layer that avoids the deposition of Li, consequently avoiding dendrite growth from the electrode and any corrosion layer between the CNT and Li foil. Scale bar, 100 μm for a, e, 20 μm for b, f, 5 μm for c, g, and 1 μm for d, h