Fig. 3.
a Ion transport mechanisms in Nafion–Zn-X protective layers [54].
Copyright 2020, Wiley–VCH. b Schematic illustration of the synthesis of HsGDY and the sub-ångström ion tunnel of HsGDY; c Electric and concentration field simulation with protuberances of bare Zn and coated Zn [55]. Copyright 2020, Wiley–VCH. d Schematic illustration of the Zn deposition process on bare Zn, Zn@Ca-Mont and Zn@Zn-Mont anodes [58]. Copyright 2021, Elsevier