fig7

Figure 7. (A) Formation process of common mosaic SEI film and heterojunction-type SEI film. Reproduced with permission from Ref.^[86]. Copyright 2022, American Chemical Society. (B) Schematic diagram of the design concept of the 3D Li-B-C-Al alloy and EDS mapping of the Li-B-C-Al alloy. Reproduced with permission from Ref.^[89]. Copyright 2022, Wiley. (C) Illustration of the formation and effects of MCI layer on Li metal anode protection. Reproduced with permission from Ref.^[91]. Copyright 2022, Elsevier. (D) Schematic of the fabrication of ultrathin Li/Li-Sn electrode and digital photos of molten Li on Cu foil and Sn-coated Cu foil at 200 °C. (E) Schematic illustration of plating/stripping behaviors of bare Li and Li/Li-Sn electrode. Reproduced with permission from Ref.^[92]. Copyright 2021, Wiley.