Solid Polymer Electrolyte for Improving the Safety of the Lithium-Sulfur Battery

Polymer electrolytes that containing: 1) Polymer matrix Polyvinylidene fluoride (PVDF), 2) Ionic liquid / quaternary ammonium salt, 3) Lithium salt - LiN(CF3So2)2, 4) Plasticizer - tetraglym (G4) have been investigated using: scanning electron microscopy, impedance, cyclic voltammetry and galvanostatic studies in the lithium-sulfur system. The prospects of the polymer electrolyte use for improving the safety of lithium-sulfur batteries are shown. Developed polymer electrolytes are promising for use in Li - S batteries in a wide temperature range from minus 20°C to plus 100°C, and for long-term storage of Li-S batteries.