Synthesis and physical properties of new fluoroether sulfones

Abstract Eight new strategically designed fluoroether sulfone solvents have been synthesized through different synthetic pathways for potential applications in lithium-sulfur battery electrolytes. The structures of these compounds have been confirmed by 1 H-NMR, 13 C-NMR and elemental analysis. Several 1,2-dimethoxyethane (DME)-based electrolyte formulations have been prepared with these solvents to derive an electrolyte with good ionic conductivity (>5 mS cm −1 at 25  ℃). The viscosity of these new additives has also been determined as it is directly related to the ionic conductivity. Three of these solvents that contain a trifluoromethyl group displayed acceptable ionic conductivity.