Binary Electrolyte Additive‐Reinforced Interfacial Molecule Adsorption Layer for Ultra‐Stable Zinc Metal Anodes

Abstract Aqueous zinc ion batteries (AZIBs) face challenges due to the limited interface stability of Zn anode, which includes uncontrolled hydrogen evolution reaction (HER) and excessive dendrite growth. In this study, a natural binary additive composed of saponin and anisaldehyde is introduced to create a stable interfacial adsorption layer for Zn protection via reshaping the electric double layer (EDL) structure. Saponin with rich hydroxyl and carboxyl groups serves as “anchor points”, promoting the adsorption of anisaldehyde through intermolecular hydrogen bonding. Meanwhile, anisaldehyde, with a unique aldehyde group, enhances HER suppression by preferentially facilitating electrocatalytic coupling with H…

• NN
  National Natural Science Foundation of China

  Awards: 52172241, 52372229
• SR
  Shenzhen Research Institute, City University of Hong Kong
• BA
  Basic and Applied Basic Research Foundation of Guangdong Province

  Award: 2024A1515011008