TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The polymer comprises comb-branch polymer having a backbone consisting of poly(alkylenes, polyacrylates, polymethacrylates, polyalkylmethacrylates, polystyrene, polytetrahydrofuran, poly(ethylene glycol), poly(vinyl acetate), polysiloxane, poly(ethylene oxide), poly(propylene oxide), polyether, or polyepoxide. It further includes comb-branch polytetrahydrofuran ether, a comb-branch polyepoxide ether, comb-branch polyvinyl ether, comb-branch polyacrylate ether, or comb-branch polystyrene ether. The comb-branch polyepoxide ether is of formula (I).R4 = (CH2CH2O), (CH2CH2CH2O), (CH2CH2CH2CH2O), or (CH2CHR5O);R5 = CH3, CH3O, or CH3OCH2CH2O;R6 = O, NH, Si, or P, preferably CH2;n = 2-20, preferably 2-7;andx/y = 1-30, preferably 1, 2.5, 5, or 10.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The salt comprises perfluoroalkylsulfonyl methides and imides, perfluoroalkylsulfonates and alkylsulfonates, in which alkyl includes lower and higher alkyls. The solvating moieties are not all identical. They comprise hydroxyls, methoxy, pyridines, pyrazines, oxazoles, phosphates, acrylates, or carbonates, preferably imidazoles. The side chain comprises alkyl, lower alkyl, allyl, alkyl ethers, lower alkyl ethers, allyl ethers, or alkylated poly(ethylene glycols). It comprises 1,3-propanediol units.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The platinum catalyst is organoplatinum catalyst. The cation comprises alkali metal, alkali earth metal, hydrogen, tetraalkyl ammonium, trialkyl ammonium, imidazolium, or pyridium. It preferably comprises lithium. EXAMPLE - A comb-branch copolymers were grafted with lithium salt 3 by a hydrosilylation reaction under a platinum catalyst retained in the salt. The equivalent amount of salt and copolymer were dissolved in tetrahydrofuran and refluxed for 3 days when 75% of allyl groups were consumed. Diethyl ether was added to precipitate the catalyst. After removal of diethyl ether, a slightly yellowish polymer was recovered and then dried. The polymer was subjected to dialysis using a membrane with a molecular cut-off of 6000-8000 for 8 days. The solution was concentrated and cast on a Teflon(TM) coated substrates. The films were transferred into a drying piston with phosphorus (V) oxide as a drying agent, and dried under vacuum at 65degreesC for 3 days. Transparent free-standing films, i.e. single-ion conductors, were obtained.