Incompatible electrode/electrolyte interface often leads to dendrite growth, parasitic reactions and corrosion, posing significant challenges to the application of Zn anodes. Herein, we introduce a biomimetic antifreeze protein localized gel electrolyte (ALGE) with multifunctional capabilities to address these issues by combining electrolyte modification with interface optimization. ALGE modifies the Zn2+ solvation structure and the hydrogen-bond network adjacent to zinc anode, effectively suppressing hydrogen evolution. Additionally, ALGE promotes (002)Zn crystal plane-dominated deposition by protein-zinc surface interactions, enabling a long-range dendrite-free deposition. The absence of by-products and inhibited corrosion further highlights the practical potential of ALGE. Symmetric cells with ALGE-modified zinc demonstrate an impressive lifespan of 610h under a current density of 10 mA/cm2 and a capacity of 10 mAh/cm2. The pouch cell integrating a manganese dioxide cathode and ALGE-modified Zn anode retains 85% of its capacity after 200 cycles at 1 A/g. This localized gel electrolyte strategy offers a practical and scalable approach to stabilizing Zn anodes for next-generation energy storage systems.
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