Enhancing Zn‐Metal Anode Stability: Key Effects of Electrolyte Additives on Ion‐Shield‐Like Electrical Double Layer and Stable Solid Electrolyte Interphase

Abstract Owing to zinc dendrites and parasitic reactions, aqueous Zn‐metal batteries often suffer from poor reversibility and cyclability. Electrolyte additives present a promising strategy to improve Zn anode stability. However, the ever‐evolving perspectives and mechanisms, paradoxically, complicate battery design, causing a scenario where any electrolyte additive seems to be effective. Herein, it is taken ionic liquid (IL) additives as an example and detailed explored the impact of three typical IL anions, namely OTF − , TFA − , and BF 4 − . It is identified that the primary determinant of electrolyte additives as their electrical double layer (EDL) structures and their subsequent solid‐electrolyte…

• NN
  National Natural Science Foundation of China

  Award: 22105040
• NS
  Natural Science Foundation of Fujian Province

  Awards: 2021J01588, 2023J01524
• NK
  National Key Laboratory of Aerodynamic Design and Research

  Award: 2020YFA0710303
• FS
  Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China

  Award: 2021ZZ127