| 초록 |
Despite the potential of aqueous zinc (Zn)-ion batteries as a cost-competitive and safer power source, practical applications have been plagued by the chemical/electrochemical instability of Zn anodes with aqueous electrolytes. Here, ionic liquid (IL) skinny gels are reported as a water-repellent ion-conducting protective layers customized for Zn anodes. The IL skinny gel (thickness ≈500 nm), consisting of hydrophobic IL solvent, Zn salts, and thiol-ene polymer skeleton, prevents the access of water molecules to Zn anodes while allowing Zn2+ conduction. The IL-gel-skinned Zn anode enables sustainable Zn plating/stripping cyclability under 90% depth of discharge (DODZn) without water-triggered interfacial side reactions. Driven by advantageous effects, a Zn-ion full cell (IL-gel-skinned Zn-anode||aqueous-electrolyte-containing MnO2 cathode) exhibits high cycling performance (95.7% capacity retention after 600 cycles) compared to conventional aqueous Zn-ion batteries. |
