Hydrogen Bonding Networks in Hybrid Binders Inhibit Vanadium Dissolution for Stable Aqueous Zinc-Ion Batteries

A hybrid binder is developed by mixing cellulose and polyvinylidene fluoride (PVDF). Hydrogen bonds formed between the hydroxyl groups of cellulose and the fluorine atoms of PVDF enhance the hydrophilicity of the cathode and suppress vanadium dissolution, thereby significantly improving the electrochemical performance of aqueous zinc-ion batteries (AZIBs). The battery not only exhibits a high specific capacity (310 mA h g^-1) but also has a high capacity retention rate (82.3%) over 3000 cycles; their performances are better than those of batteries prepared with PVDF and cellulose alone as binders. In contrast, the B1-based battery exhibits a specific capacity of 156 mAh g^-1 with a capacity retention of 70.9%, while the B2-based battery shows a capacity of 243 mAh g^-1 with 72.5% retention. This direction not only helps to improve the electrochemical performance of ZIBs but also promotes the widespread use of environmentally friendly, renewable materials in battery technology.