Synergistic Tip Effect Suppression and Solvation Regulation for High‐Performance Aqueous Zinc‐Ion Batteries

ABSTRACT Aqueous zinc‐ion batteries (AZIBs) offer a safe and sustainable energy storage solution, yet their practical deployment is impeded by uncontrolled Zn dendrite formation and parasitic reactions originating from unstable electrode–electrolyte interfaces. Here, we introduce sodium anthraquinone‐2,6‐disulfonate (A26DA) as a multifunctional electrolyte additive that simultaneously regulates Zn ²⁺ solvation chemistry and interfacial Zn deposition. The anthraquinone‐2,6‐disulfonate dianion (A26DA ²⁻ ), featuring a highly electronegative and π‐conjugated architecture, strongly coordinates with Zn ²⁺ , regulating the [Zn(H ₂ O) ₆ ] ²⁺ solvation sheath and effectively suppressing water activity. This molecular‐level solvation engineering promotes uniform Zn nucleation and mitigates dendritic growth, thereby stabilizing interfacial electrochemistry. Benefiting from this tailored Zn ²⁺ microenvironment, the A26DA‐modified Zn anode delivers an elevated Coulombic efficiency of 99.3% and long‐term cycling stability exceeding 2000 h. This work unveils a scalable molecular design strategy based on π‐conjugated sulfonate coordination chemistry to enable high‐performance, dendrite‐free AZIBs.