A Stable High-Performance Zn-Ion Batteries Enabled by Highly Compatible Polar Co-Solvent.

ABSTRACT: Uncontrollable growth of Zn dendrites, irreversible dissolution of cathode material and solidification of aqueous electrolyte at low temperatures severely restrict the development of aqueous Zn-ion batteries. In this work, 2,2,2-trifluoroethanol (TFEA) with a volume fraction of 50% as a highly compatible polar-solvent is introduced to 1.3 M Zn(CF₃SO₃)₂ aqueous electrolyte, achieving stable high-performance Zn-ion batteries. Massive theoretical calculations and characterization analysis demonstrate that TFEA weakens the tip effect of Zn anode and restrains the growth of Zn dendrites due to electrostatic adsorption and coordinate with H₂O to disrupt the hydrogen bonding network in water. Furthermore, TFEA increases the wettability of the cathode an

SUBMITTER: Yang S 

PROVIDER: S-EPMC11425257 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature