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The irreversible chemistry of the Zn anode, attributed to parasitic reactions and the growth of zinc dendrites, is the bottleneck in the commercialization of aqueous zinc-ion batteries. Herein, an efficient strategy via constructing an organic protective layer configured with a honeycomb-like globular-covalent organic framework (G-COF) was constructed to enhance the interfacial stability of Zn anodes. Theoretical analyses disclose that the methoxy and imine groups in G-COF have more negative adsorption energy and electrostatic potential distribution, favorable Zn 2+ adsorption, and diffusion. Experimental results demonstrate that G-COF effectively protects the Zn anode from dendrite formation and surface corrosion, leading to a stable and homogeneous Zn 2+ deposition. Notably, the G-COF@Zn||G-COF@Zn symmetric cell obtained high stability for over 1650 h under 3 mA cm –2 for 1 mA h cm –2 . Full cells assembled with the δ-MnO 2 cathode and G-COF@Zn anode demonstrates exceptional rate capability and consistent cycling over 1000 cycles at a current density of 1 A g –1, achieving a specific capacity of 217 mA h g –1 . Our work provides novel insight into interfacial regulation of Zn anodes for the implementation of practical aqueous zinc-ion batteries with long-term cycling characteristics.
He et al. (Thu,) studied this question.