TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The composition further comprises an ionic liquid and an organic solvent that enhances ionic conductivity of the composition. Preferred Components: The poly(glycidyl ether) has a structure of formula (R1a-((CH2)m-C(CH2-O-R)-O)n-R2a) (I), (R1a-((CH2)m-C(CH2-S-R)-O)n-R2a) (II), (R1a-((CH2)m-C(CH2-S(=O)-R)-O)n-R2a) (III) or (R1a-((CH2)m-C(CH2-S(=O)2-R)-O)n-R2a) (IV). The poly(glycidyl ether) is polyglycidol. The poly(glycidyl ether) is copolymerized with ethylene oxide. The poly(glycidyl ether) comprises a random or statistical copolymer of two or more glycidyl ether monomers. The poly(glycidyl ether) comprises a pendant linear or branched ether or oligomeric ether side chain with or without a thiol-ether linkage between the pendant ether and polymer backbone. The polymer is blended with another polymer that comprises poly(alkyl glycidyl ether). The polymer is blended with another polymer that is a polyether. The polymer is blended with at least one mechanically strong solid polymer, forming a polymer blend. The mechanically strong solid polymer comprises one or more block copolymers, each block copolymer comprising a poly(glycidyl ether) block or another homopolymer block covalently bound to a polymer block that is a mechanically strong solid at room temperature. The polymer blend or the polymer comprising poly(glycidyl ether) forms a bicontinuous microemulsion. The polymer is a linear or non-linear block copolymer comprising the poly(glycidyl ether) covalently bound to a polymer block that is a mechanically strong solid at room temperature. The polymer is in the form of a solid mesostructured material with ionically conductive domains comprising poly(glycidyl ether) polymeric material. The polymer is blended with one or more linear or non-linear block copolymers, each block copolymer comprising poly(glycidyl ether) covalently bound to a block that is a mechanically strong solid at room temperature, thus forming ionically-conductive, mesoscopic poly(glycidyl ether) domains adjacent to domains rich in a mechanically strong block. The block copolymer is in the form of a miktoarm star. The polymer is blended with one or more linear or non-linear block copolymers, each block copolymer comprising poly(glycidyl ether) covalently bound to a block that is a mechanically strong solid at room temperature, where one or more of the block copolymer is in the form of a non-linear miktoarm star.R, R2a = H or aliphatic or aromatic group;R1a = H, aliphatic or aromatic group, ether of aliphatic or aromatic group, azide, halo, or perfluoroalkane;m = 1 or 2; andn = greater than or equal to 2. EXAMPLE - Poly(allyl glycidyl ether) (PAGE) was mixed with lithium bistrifluoromethanesulfonylimide (LiTFSI). The PAGE-LiTFSI mixture was stirred at 50 degrees C for at least three hours. The PAGE-LITFSI mixture were prepared and stored in a dry glove box under an argon atmosphere.