Polymer electrolyte coatings for lithium anodes in SOCl2 cells

Polymer electrolytes based on poly[bis-((methoxyethoxy)ethoxy) phosphazene] (MEEP) or its composites with poly(ethylene oxide) (PEO) or poly[(ethylene glycol)diacrylates)] (PEGDA) have been investigated as coatings on the lithium anode to alleviate the voltage delay of Li/SOCl2 cells. Cells with the polymer electrolyte-coated anodes exhibited significantly lower voltage delays and better capacity retention when discharged after two weeks of storage at 70 °C.