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Updated: May 19, 2026

Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
Synergistic Tip Effect Suppression and Solvation Regulation for High-Performance Aqueous Zinc-Ion Batteries
Siyi Li1, Weicheng Li2, Zhihao Deng1
1Shanghai Key Laboratory of Functional Materials Chemistry, Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, China.
None:
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 Zn2+ solvation chemistry and interfacial Zn deposition. The anthraquinone-2,6-disulfonate dianion (A26DA2-), featuring a highly electronegative and π-conjugated architecture, strongly coordinates with Zn2+, regulating the [Zn(H2O)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 Zn2+ 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.
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