Bifunctional Hydrophobic Conductive Interface Enabling Scalable and Highly Stable Aqueous Zinc‐Ion Batteries

Aqueous zinc‐ion batteries (ZIBs) have emerged as promising candidates for next‐generation energy storage systems, owing to the intrinsic‐safety aqueous electrolyte and high‐energy‐density electrode materials. However, their electrochemical performance is limited by two critical interface issues: vulnerability to electrolyte corrosion and insufficient active material adhesion. Here, we develop a bifunctional hydrophobic conductive interface, which effectively mitigates electrode detachment and corrosion. The as‐assembled MnO 2 //Zn batteries retain a high specific capacity of 141.6 mAh g −1 after 1500 cycles at 1.0 C. The prototype pouch cell with a high energy density of 100 Wh kg −1 delivers a long cycle life of 1000 cycles. This advancement not only enhances the electrochemical performance of ZIBs but also paves the way for safe, cost‐efficient, and high‐performance energy storage solutions.