Polymer Electrolyte and Method of Preparing Same

A polymer electrolyte includes a polymer matrix including a polymer having a repeating unit represented by the formula and an ionic liquid. Rto Rare each one of a substituted or unsubstituted C-Calkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, or combinations thereof. Each Ris one of hydrogen, a halogen group, a nitrile group, a nitro group, an amine group, a substituted or unsubstituted C-Calkyl group, a substituted or unsubstituted C-Calkoxy group, a substituted or unsubstituted aryl group, a substituted or unsubstituted C-Cheteroaryl group, or combinations thereof. Substituents of Rto Rare each one of a halogen group, a cyano group, a nitro group, a C-Calkyl group, or combinations thereof, x is an integer of 1 to 8, and n is an integer of 60 to 3200.