Suppressing Dendrite Growth by Dolosse-Structured ZIF-67 Polycrystalline Membranes Through Eliminating Interfacial...

Aqueous Zn-ion batteries (ZIBs) are considered a promising candidate for next-generation energy storage devices, but the Zn dendrite problem limits their practical application potential. Although existing solutions, such as electrolyte additives and electrode coatings, can effectively address this issue, but almost all these solutions are based on a static electrolyte model and overlook the relationship between electrolyte flow and dendrite growth. Herein, inspired by the principle of dolosse to reduce the impact of waves on coastlines, we utilized the epitaxial growth characteristics of metal-organic frameworks (MOFs) to construct a ZIF-67 polycrystalline membrane with macro-microporous on Zn foil (D-67M@Zn). The dolosse-like structure of the membrane effectively eliminates turbulence at the electrode-electrolyte interface, enabling Zn²⁺ to deposit in a stable electrolyte environment, reducing the secondary nucleation rate of Zn, and inhibiting dendrite growth. The macro-microporous skeleton also helps regulate the morphology of Zn deposition, as confirmed by fluid dynamics analysis and AC-STEM. Benefiting from the unique properties of D-67M, both symmetric cells and full cells based on the D-67M@Zn anode exhibit impressive cycling stability.