TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The polymer is copolymer obtained by polymerizing monomer salt and chemical crosslinking component. The monomer salt is of formula (1).Y1,Y2 = substituent having polymerizable functional group such as acrylate, acrylamide, allyl, styryl or vinyl group;X- = ionic functional group in ionic bond;R1,R2 = 1-5C linear or branched alkyl;andR3-R5 = 1-20C linear or branched alkyl and/or 6C or more long-chain alkyl group. EXAMPLE - 2-acrylamide-2-methyl-1-propane sulfonic acid (AMPS) (in g) (10.36) was dissolved in methanol (450 ml) and water (50 ml). Silver carbonate (8.27) was added to the obtained solution, stirred for 8 hours, and filtered, to obtained colorless and transparent liquid (A). Liquid (A) was concentrated, to obtain silver-salt of AMPS as white crystal precipitate. The white crystal (11.3) was filtered and dried. Solution (S1) was obtained by dissolving 2-ethyl methacrylate dimethyl dodecyl ammonium chloride (4.5) in methanol (10 ml). Solution (S2) was obtained by dissolving silver salt of AMPS (4.2) in mixed solvent containing acetonitrile (8 ml) and methanol (2 ml). Solution (S1) was dripped into solution (S2) (9.5 ml), stirred and precipitate, to obtain white solid of silver chloride. The white solid was filtered, concentrated, and methanol and acetonitrile were completely removed, to obtain colorless and transparent salt of monomer A. Non-aqueous electrolyte (1mol/l) was obtained by dissolving lithium perchloride in mixed solvent containing ethylene carbonate and ethylmethyl carbonate at a ratio of 1/3. Salt of monomer (A) (0.03) and diethylene glycol diacrylate (0.049), were mixed. Non-aqueous electrolyte (0.7 ml) was added to the obtained solution, stirred and dissolved, to obtain monomer solution. The monomer solution was degassed. Solution (0.3 ml) obtained by dissolving benzoyl peroxide (0.009) in non-aqueous electrolyte (0.6 ml), was added to the monomer solution, and stirred. The obtained transparent solution was heated at 80degreesC, to obtain lithium ionic conductive gel-form electrolyte. The obtained electrolyte had ionic conductivity of 8.3 mS/cm, and favorable mechanical strength and electrochemical stability.