Hierarchical Interface Enabled by a Guest‐Anionic Chemistry for High‐Rate Aqueous Zinc‐ion Batteries

Abstract The poor reversibility of the zinc anode caused by interfacial side reactions and dendritic growth poses significant constraints on the practical application of aqueous zinc‐ion batteries. Herein, a co‐solute, acesulfame potassium, with strongly polar, zincophilic guest anions is introduced into a conventional low‐concentration aqueous electrolyte. This regulation enhances the electrolyte‘s ionic conductivity and accelerates the desolvation process of zinc ions at the electrode/electrolyte interface. Furthermore, the introduced acesulfame anions give rise to the formation of a stable solid electrolyte interface with a hierarchical crystalline‐amorphous bilayer structure that effectively suppresses…

• NN
  National Natural Science Foundation of China

  Award: 22371167
• NS
  Natural Science Foundation of Shandong Province

  Awards: ZR2022ZD29, ZR2024MB030