A polymer electrolyte comprising a polymerization product of: a polymer comprising an unsaturated functional group at a terminal thereof and a fluoroalkylene chain, and an ion-conductive polymer comprising an unsaturated functional group at a terminal thereof, wherein the ion-conductive polymer comprising an unsaturated functional group at a terminal thereof is a polymer represented by Formula 1 or Formula 2, and wherein the polymer having an unsaturated functional group at a terminal thereof and a fluoroalkylene chain is a compound represented by Formula 3: wherein, in Formula 1, R 1 and R 2 are each independently a hydrogen or a C1-C5 alkyl group, and L is one selected from groups represented by Formula 1a, wherein, in Formula 1a, R 1 is a C1-C5 alkylene group, R 2 and R 3 are each independently a C1-C5 alkyl group, a is an integer from 1 to 10, k is an integer from 1 to 10, I is an integer from 1 to 10, and * denotes a binding site to a neighboring atom, wherein, in Formula 2, R 1 is a hydrogen or a C1-C5 alkyl group, and L' is one selected from groups represented by Formula 2a, wherein, in Formula 2a, a is an integer from 1 to 10, R 1 is a C1-C5 alkylene group, R 0 and R 2 to R 6 are each independently a C1-C10 alkyl group, a C6-C10 aryl group, or a C1-C10 heteroaryl group, k is an integer from 1 to 10, I is an integer from 1 to 10, and * denotes a binding site to a neighboring atom, wherein, in Formula 3, L 1 and L 3 are each independently a bond or -C(=O)O-R-NH-, wherein R is a divalent, trivalent or tetravalent group and selected from a C1-C20 aliphatic hydrocarbon group, a C5-C40 cycloaliphatic group, a C5-C40 cycloaliphatic urethane group, a C6-C40 aryl group, and a C2-C40 heteroaryl group, A 1 and A 2 are each independently a bond or a divalent, trivalent or tetravalent bonding group, L 2 is a fluoropolyalkylene oxide chain or a perfluoropolyalkylene oxide chain, R 1 and R 2 are each independently a hydrogen or a C1-C5 alkyl group, and n and m are each independently an integer from 1 to 3. a polymer comprising an unsaturated functional group at a terminal thereof and a fluoroalkylene chain, and an ion-conductive polymer comprising an unsaturated functional group at a terminal thereof, wherein the ion-conductive polymer comprising an unsaturated functional group at a terminal thereof is a polymer represented by Formula 1 or Formula 2, and wherein the polymer having an unsaturated functional group at a terminal thereof and a fluoroalkylene chain is a compound represented by Formula 3: wherein, in Formula 1, R 1 and R 2 are each independently a hydrogen or a C1-C5 alkyl group, and L is one selected from groups represented by Formula 1a, wherein, in Formula 1a, R 1 is a C1-C5 alkylene group, R 2 and R 3 are each independently a C1-C5 alkyl group, a is an integer from 1 to 10, k is an integer from 1 to 10, I is an integer from 1 to 10, and * denotes a binding site to a neighboring atom, wherein, in Formula 2, R 1 is a hydrogen or a C1-C5 alkyl group, and L' is one selected from groups represented by Formula 2a, wherein, in Formula 2a, a is an integer from 1 to 10, R 1 is a C1-C5 alkylene group, R 0 and R 2 to R 6 are each independently a C1-C10 alkyl group, a C6-C10 aryl group, or a C1-C10 heteroaryl group, k is an integer from 1 to 10, I is an integer from 1 to 10, and * denotes a binding site to a neighboring atom, wherein, in Formula 3, L 1 and L 3 are each independently a bond or -C(=O)O-R-NH-, wherein R is a divalent, trivalent or tetravalent group and selected from a C1-C20 aliphatic hydrocarbon group, a C5-C40 cycloaliphatic group, a C5-C40 cycloaliphatic urethane group, a C6-C40 aryl group, and a C2-C40 heteroaryl group, A 1 and A 2 are each independently a bond or a divalent, trivalent or tetravalent bonding group, L 2 is a fluoropolyalkylene oxide chain or a perfluoropolyalkylene oxide chain, R 1 and R 2 are each independently a hydrogen or a C1-C5 alkyl group, and n and m are each independently an integer from 1 to 3.