TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Method: The polymeric electrolyte composition may be coated to cathode and/or anode surface(s). The coated cathode and/or anode is heated to 40-100degreesC. The sol-forming electrolyte is formed by impregnating an electrolytic solution in a polymer, and has a weight average molecular weight of 500-100000. The cathode is prepared by dissolving lithium cobalt oxide (94 g), Super P conductive carbon (3 g), polyvinylidenefluoride (PVDF) (3 g) in N-methylpyrrolidone (NMP) (500 g) to produce a cathode active material composition; coating an aluminum foil with the cathode active material composition; and drying the coated aluminum foil. The anode is prepared by dissolving mezocarbon fiber (89.8 g), oxalic acid (0.2 g), and PVDF (10 g) in NMP (500 g) to produce an anode active material composition; coating copper foil with the anode active material composition; and drying the coated copper foil. The polymeric electrolyte is prepared by mixing epichlorohydrin polyglycol epoxy resin (2.5, 2, 1.5, or 1 g) and diethyl triethylamine (2.5, 1, 1.5, or 2 g), electrochemically polymerizable material (3 g) with electrolytic solution (100 g); and hermetically sealing and heating the mixture at 80degreesC for 3 hours for hardening. It may also be prepared by mixing 1,6-diisocyanatohexane (0.1 g), polyethylene glycol dimethacrylate (0.1 g) and azoisobutyronitrile (0.005 g) with electrolytic solution (2.9 g) 1.15 M lithium hexafluorophosphate (LiPF6) mixed with ethylene carbonate/ethylmethyl carbonate/diethyl carbonate (EC/EMC/DEC) in a volume ration of 3:3:4, or mixing polyethylene glycol (0.1 g) having a weight average molecular weight of 400 and tributyl tin diacetate (0.05 g) with aqueous solution of 1.15 M LiPF6 (2.9 g) mixed with EC/EMC/DEC in a volume ratio of 3:3:4; and polymerizing at 80degreesC for 2 hours. The heating temperature for the thermal polymerization is 20-90degreesC. The urethane-based resins are produced by polymerization in the presence of tin catalyst, followed by reaction between unsaturated groups in the urethane-based resins.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The electrolyte comprises 50-99.9 pbw electrolytic solution. It includes 0.1-10 pbw electrochemically polymerizable material polymerized at 4.2-6 V.Preferred Materials: The sol-forming polymer is obtained by polymerization of 0.1-10 pbw thermopolymerizable material as sol-forming polymer precursor. The thermopolymerizable material includes mixtures of epoxy-based resins and amine compounds, acrylic based resins or urethane-based resin precursors. The epoxy-based resins are epichlorohydrin-polyglycol epoxy resins of formula (I). The amine compounds include diethyl triamine, or hexamethyldiamine. The urethane-based precursors include mixture of 1,6-diisocyanatohexane and polyethylene glycol, or a mixture of 1,4-diisocyanatohexane and polyethylene glycol. The acryl-based resin consists of polyethyleneglycol di(meth)acrylate. The polymerizable material consists of 3,4-methylenedioxyacetophene, 1,4-benzodioxan-6-yl methylketone, o-terphenyl, o-benzylbiphenyl, p-benzylbiphenyl, diphenyleneoxide, hydrogenated o-terphenyl, or biphenyl. The separator is made of polypropylene or polyethylene. The support film comprises polyethylene terephthalate substrate, mylar film, or glass substrate.n = 2-20 (preferably 2-10). EXAMPLE - Polymeric electrolyte composition was prepared by mixing epichlorohydrin polyglycol epoxy resin (2.5 g), diethyl trimethylamine (2.5 g), 3,4-methylenedioxy-acetophenone (3 g) with electrolytic solution (100 g). An ethylene carbonate/ethylmethyl carbonate/propylene carbonate/fluorinated benzene electrolytic solution mixed in a volume ratio of 30:55:5:10 was used as electrolytic solution. The resultant product was hermetically sealed and heated at 80degreesC for 3 hours. A lithium battery comprising the polymeric sol electrolyte, showed good discharge characteristics even at high-rate state of 2 C, and safety.