TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The electrolyte salt comprises a combination of cation including lithium (Li+), sodium (Na+), or potassium (K-1), and an anion from hexafluorophosphate (PF-6), tetrafluoroborate (BF-4), chloride (Cl-), bromide (Br-), iodide (I-), perchlorate (ClO4-), arsenic hexafluoride (AsF6-), CF3CO2-, CF3SO3-, N(CF3SO2)2, or C(CF2SO2)3- (all not defined).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The electrolyte solvent is cyclic carbonates, linear carbonates, lactones, ethers, esters, sulfoxides, acetonitriles, lactams, ketones, or their halogen derivative.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The polymerizable monomer is a compound having a polymerizable functional group from vinyl group, epoxy group, allyl group, or (meth)acryl group. It is 0.1-10, preferably 0.01-5 pts.wt. EXAMPLE - N-methyl-2-pyrrolidone (NMP) was added with lithium cobalt oxide (LiCoO2) (94 wt.%) as a cathode active material, carbon black (3wt.%) and polyvinylidene fluoride (3 wt.%) to form slurry for a cathode. The slurry was coated on aluminum foil having a thickness of 20 mu m, and dried to form a cathode via roll press. NMP was added with carbon powder (96 wt.%) as an anode active material, PVDF (3 wt.%) and carbon black (1 wt.%) to form mixed slurry for an anode. The slurry was coated on copper foil having a thickness of 10 mu m, and dried to form an anode via roll press. In fabrication of the battery, the cathode and anode, and the separator coated with the polymerization initiator were used. Also, an electrolyte was prepared by adding di(trimethylopropene) tetraacrylate (5 pts.wt) to electrolyte solution (100 pts.wt.), that was, a non-aqueous electrolyte solvent including ethylene carbonate and ethyl methyl carbonate in a ratio of 1:2 (v:v) and containing 1M lithium hexafluorophosphoric acid. After 3 hours from the injection, polymerization was carried out at 80 degrees C for 4 hours under nitrogen atmosphere to obtain a coin-type secondary battery.