Electric Field Propelled Anion‐Type Solvation Structure Reconstruction With Accelerated Kinetics for Low‐Temperature Zinc Metal Batteries

ABSTRACT Organic‐rich eutectic electrolytes, which have been prevalent to address the electrolyte freezing and Zn dendrite growth challenges for low‐temperature aqueous zinc‐based batteries, suffer from sluggish Zn 2+ desolvation kinetics and mass transport. Here, we introduce aprotic acetone as a cosolvent to improve the performance of aqueous Zn(BF 4 ) 2 ‐based electrolyte under cold environments. Leveraging dynamic keto‐enol tautomerism in the primary solvation sheath of Zn 2+ propelled by the electrical double layer electric field, an anion‐type solvation structure is established, which shortens the Zn 2+ desolvation path with accelerated kinetics and constructs a tough and tight interface with a gradient…

• NN
  National Natural Science Foundation of China

  Awards: U25A20238, 52472215, 92572201, 22205123, 22202011
• NS
  Natural Science Foundation of Shandong Province

  Awards: ZR2022QB004, ZR2022QB056