Low‐cost and Non‐flammable Eutectic Electrolytes for Advanced Zn‐I 2 Batteries

Abstract As a burgeoning electrolyte system, eutectic electrolytes based on ZnCl 2 /Zn(CF 3 SO 3 ) 2 /Zn(TFSI) 2 have been widely proposed in advanced Zn‐I 2 batteries; however, safety and cost concerns significantly limit their applications. Here, we report new‐type ZnSO 4 ‐based eutectic electrolytes that are both safe and cost‐effective. Their universality is evident in various solvents of polyhydric alcohols, in which multiple −OH groups not only involve in Zn 2+ solvation but also interact with water, resulting in the high stability of electrolytes. Taking propylene glycol‐based hydrated eutectic electrolyte as an example, it features significant advantages in non‐flammability and low price that is…

• NC
  National Computational Infrastructure
• AG
  Australian Government
• AI
  Australian Institute of Nuclear Science and Engineering
• UO
  University of Adelaide
• AR
  Australian Research Council

  Awards: DE230100032, DP220102596, FL170100154, DP200100365, DE230100471