Fig. 6

2D materials composited Na/Zn metal anodes. a Schematic representation of the preparation of Na@r-GO composites. Densely stacked GO films can expand greatly owning to the gas evolved during the reduction reaction. Upon contact with r-GO, the melted Na can be absorbed into the space between the r-GO sheets. b–d SEM images of GO films with different thickness and their corresponding Na@r-GO composite films, whose thickness are roughly 20-times of that of GO. Reprinted with permission from [137]. Copyright 2017, Wiley–VCH. e Schematic representing Zn deposition behaviour on MXene@Sb-300 and Ti foil. Reprinted with permission from [124]. Copyright 2021, Elsevier. 2D materials composited Na/Zn metal anodes can also homogenize the metal deposition