Hydrated Eutectic Electrolyte Induced Bilayer Interphase for High‐Performance Aqueous Zn‐Ion Batteries with 100 °C Wide‐Temperature Range

Abstract The practical implementation of aqueous zinc‐ion batteries (AZIBs) encounters challenges such as dendrite growth, parasitic reactions, and severe decay in battery performance under harsh environments. Here, a novel hydrated eutectic electrolyte (HEE) composed of Zn(ClO 4 ) 2 ·6H 2 O, ethylene glycol (EG), and InCl 3 solution is introduced to effectively extend the lifespan of AZIBs over a wide temperature range from −50 to 50 °C. Molecular dynamics simulations and spectroscopy analysis demonstrate that the H 2 O molecules are confined within the liquid eutectic network through dual‐interaction, involving coordination with Zn 2+ and hydrogen bonding with EG, thus weakening the activity of free water…

• NS
  Natural Science Foundation for Distinguished Young Scholars of Anhui Province

  Award: 2108085J25
• NN
  National Natural Science Foundation of China

  Awards: 52302205, 52172173
• NS
  Natural Science Foundation of Anhui Province

  Award: 2208085QE130