PVA-POLYESTER AS HIGHLY CONDUCTIVE AND STABLE POLYMER ELECTROLYTES FOR LITHIUM/SODIUM SECONDARY BATTERIES

The present invention relates to a solid electrolyte comprising a polymer and a salt selected from the group consisting of a lithium salt, a sodium salt and mixtures thereof, wherein the polymer comprises at least 50 mol% of recurring units of formula (I), to a method for the preparation of said electrolyte, its uses and energy storage devices comprising said electrolyte.