Lithium-Conducting Ionic Melt Electrolytes from Polyether-Functionalized Fluorosulfonimide Anions

摘要

Ionic melt electrolytes consisting of lithium salts of fluorosulfonimide and fluorosulfonate anions covalently attached to oligomeric polyether chains were synthesized and characterized with respect to structure and ion transport characteristics. Conductivities are high relative to true polymer electrolytes. Galvanostatic DC polarization studies suggest that salt concentration polarization does not occur in the ionic melt electrolytes, whereas it does occur in otherwise similar electrolytes consisting of binary lithium salts dissolved in a liquid oligomeric polyether solvent.