SOLID-STATE ELECTROLYTE INCLUDING A METAL-ORGANIC FRAMEWORK

A solid-state polymer electrolyte including, based on the weight of the electrolyte: from 60 to 75 wt. % of polyethylene oxide (PEO); from 20 to 30 wt. % of a lithium salt (LiX); and, from 1 to 20 wt. % of a zirconium (IV) benzene-1,3,5-tricarboxylate (BTC) metal-organic framework (MOF). The solid-state polymer electrolyte has an X-ray diffraction (XRD) pattern of MOF-808 and has the general formula ZrO(OH)(BTC)(L), wherein L is an anion selected from the group consisting of fluoride, formate (COO), acetate (CHCOO), propionate (CHCHCOO) and benzoate (CHCOO). The solid-state polymer electrolyte may have: an enthalpy of melting (ΔH) of less than 50 Jg; and, an ionic conductivity of at least 30 μScm, as determined by electrochemical impedance spectroscopy (EIS) at 20° C.