Conclusion
To summarize, an in situ ion sieve interphase based on 2D Zn2(bim)4 MOF with a pore size of ~2.1 Å was developed for high-performance zinc anodes using a novel gel vapor deposition method. This MOF protective interphase with fine pores can physically reject the transport of large Zn2+-H2O coordination pairs and facilitate the desolvation of Zn2+ at the electrode/electrolyte interface, as evidenced by Raman spectra and impedance analysis. As a result, it significantly extends the lifespan of Zn//Zn symmetric cells (~1000 h at 0.5 mA cm-2, 0.5 mAh cm-2, and ~700 h at 1 mA cm-2, 1 mAh cm-2). Furthermore, when the Zn@Zn2(bim)4 anode was paired with a MnO2 cathode, the full cell demonstrated improved rate performance and stable cycling over 1200 cycles at 1 A g-1. The GVD method allows for the in situ layered growth of a 2D MOF into a continuous layer, and the unique pore sizes can physically desolvate zinc ions and alleviate water-induced corrosion. This work offers insights into the regulation of Zn2+ transport with the size effect of MOF channels and provides a route for interface construction to extend the cycle life of zinc anodes.