| 초록 |
Despite their potential as promising alternatives to current lithium-ion batteries, aqueous rechargeable Zn-ion batteries are still far away from practical applications. Here, we present a new class of single-ion conducting electrolytes based on a zinc sulfonated covalent organic framework (TpPa-SO3Zn0.5) to address this challenging issue. TpPa-SO3Zn0.5 is synthesized to exhibit single Zn2+ conduction behavior via its delocalized sulfonates that are covalently tethered to directional pores and achieve structural robustness by its b-ketoenamine linkages. Driven by these structural and physicochemical features, TpPa-SO3Zn0.5 improves redox reliability of the Zn metal anode and acts as an ionomeric buffer layer for stabilizing the MnO2 cathode. Such improvements in the TpPa-SO3Zn0.5–electrode interfaces, along with the ion transport phenomena, enable aqueous Zn–MnO2 batteries to exhibit long-term cyclability, demonstrating the viability of COF-mediated electrolytes for Zn-ion batteries. |
