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Ultralow Concentration Zwitterionic Additives Enable Rapid Adsorption Equilibrium Promoting Long‐Life Aqueous Zinc‐Ion Battery
Author(s) -
Wang Longyang,
Liu Renke,
Xue Shiyan,
Xu Lei,
Jia Xinwang,
Yao Jia,
Zhang Jun,
Wan Houzhao,
Wang Hao,
Tao Li
Publication year - 2025
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202501347
Abstract Aqueous zinc‐ion batteries (AZIBs) face challenges in practical applications due to unstable electrode‐electrolyte interfaces and zinc dendrite growth. This study introduces an ultra‐low concentration (5 mmol L⁻¹) zwitterionic additive, Pyridinium‐1‐Propane‐3‐sulfonate (PPS), to reconstruct the electric double layer (EDL) and regulate zinc surface reactions. Compared with structurally similar ionic additive N‐Butylsulfonicpyridinium (BSO 3 Py) and imidazole‐based zwitterionic additive 3‐(1‐Methyl‐1H‐imidazol‐3‐ium‐3‐yl) propane‐1‐sulfonate (MPS), PPS exhibits superior parallel adsorption on zinc. Its dynamic adaptation to Zn 2+ deposition achieves rapid adsorption equilibrium, optimizing zinc active site utilization. Sulfonic acid groups form a robust interfacial layer through intermolecular interactions, while the hydrophobic pyridine ring blocks water/sulfate contact. Symmetric batteries with PPS achieved 700 hours of cycling at 20 mA cm⁻ 2 and cumulative plating capacity exceeding 7000 mAh, alongside 99.81% Coulombic efficiency at 5 mA cm⁻ 2 . Zn‐VO 2 full batteries retained 247.46 mAh g⁻¹ after 1200 cycles at 5 A g⁻¹. This interfacial engineering strategy provides a scalable solution for stable AZIBs.

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