He X; Liu X; Li G; Chen Q; He L; Ma D; Wang Y; Zhang L; Zhang P
ACS Appl Mater Interfaces 2025[Dec]; ? (?): ? PMID41388961show ga
Aqueous zinc-ion batteries (AZIBs) are considered among the most promising energy storage systems because of their low cost, high safety, and high theoretical capacity. However, challenges including Zn(2+) desolvation, side reactions, and dendritic growth significantly hinder their rate capability and cycling stability. In this study, we propose a molecule-substitution-induced anchoring strategy by introducing kojic acid molecules with carbon-based (C horizontal lineO) and hydroxyl (C-OH) groups to modulate the Zn(2+) solvation structure, lower the desolvation activation energy, and effectively suppress undesirable side reactions. More importantly, its pyranone ring (C-O-C) can anchor onto the Zn surface to form an adsorption layer, which induces the uniform deposition of Zn(2+) ions and consequently suppresses dendrite formation. At a current density of 1 mA cm(-2) and an areal capacity of 1 mAh cm(-2), the symmetric cell demonstrated an ultralong lifespan of 2800 h and a high Coulombic efficiency of 99.72%. Furthermore, the assembled Zn||delta-MnO(2) full cell had a capacity retention of 95% after 1500 cycles at 3 A g(-1). Even at an elevated temperature of 50 degrees C, the cell retained a capacity of 197.9 mAh g(-1) after 200 cycles.
ACS+Appl+Mater+Interfaces 2025 ; ? (?): ?
