TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The lithium cationic single-ion conducting inorganic filler comprises an inorganic filler particle and an ionic hydrophilic group introduced onto a surface of the inorganic filler particle. The electrolyte solution comprises at least one lithium salt from lithium perchlorate (LiClO4), lithium triflate (LiCF3SO3), lithium hexafluorophosphate (LiPF6), lithium tetrafluoroborate (LiBF4), or lithium trifluoromethanesulfonylimide (LiN(CF3SO2)2). Preferred Material: The inorganic filler particle is silica, talc, alumina (Al2O3), gamma-lithium aluminum oxide, titanium dioxide, zeolite, molybdenum phosphate hydrate, or tungsten phosphate hydrate. Preferred Composition: An introduction ratio of the ionic hydrophilic group on the surface of the inorganic filler particle is 0.001-99.999 wt.%. The lithium cationic single-ion conducting inorganic filler is added at 1-100 wt.%, based on the total weight of polymers constituting the second polymer matrix. The lithium salt is dissolved in the electrolyte solution at 1-200 wt.%, based on the total weight of polymers constituting the first polymer matrix and the second polymer matrix. Preferred Method: The operation of synthesizing the lithium cationic single-ion conducting inorganic filler comprises substituting a surface hydroxyl group (-OH) of the inorganic filler particle by a functional group containing a sulfonic acid group (-SO3H) or a carboxyl group (-COOH); and substituting a proton (H+) of the sulfonic acid group (-SO3H) or carboxyl group (-COOH) by a lithium ion (Li+).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The lithium cationic single-ion conducting inorganic filler comprises an inorganic filler particle and an ionic hydrophilic group introduced onto a surface of the inorganic filler particle. The electrolyte solution comprises at least one lithium salt from lithium perchlorate (LiClO4), lithium triflate (LiCF3SO3), lithium hexafluorophosphate (LiPF6), lithium tetrafluoroborate (LiBF4), or lithium trifluoromethanesulfonylimide (LiN(CF3SO2)2). Preferred Material: The inorganic filler particle is silica, talc, alumina (Al2O3), gamma-lithium aluminum oxide, titanium dioxide, zeolite, molybdenum phosphate hydrate, or tungsten phosphate hydrate. Preferred Composition: An introduction ratio of the ionic hydrophilic group on the surface of the inorganic filler particle is 0.001-99.999 wt.%. The lithium cationic single-ion conducting inorganic filler is added at 1-100 wt.%, based on the total weight of polymers constituting the second polymer matrix. The lithium salt is dissolved in the electrolyte solution at 1-200 wt.%, based on the total weight of polymers constituting the first polymer matrix and the second polymer matrix. Preferred Method: The operation of synthesizing the lithium cationic single-ion conducting inorganic filler comprises substituting a surface hydroxyl group (-OH) of the inorganic filler particle by a functional group containing a sulfonic acid group (-SO3H) or a carboxyl group (-COOH); and substituting a proton (H+) of the sulfonic acid group (-SO3H) or carboxyl group (-COOH) by a lithium ion (Li+).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The lithium cationic single-ion conducting inorganic filler further comprises a hydrophobic group introduced onto the surface of the inorganic filler particle. Preferred Material: The ionic hydrophilic group is a single- or a multiple-species functional group from SO3-Li+, SO2C6H4COO-Li+, C6H3(SO2NH2)COO-Li+, CH(COO-Li+)CH2COOLi+, C6H3(OH)COO-Li+, C6H2(NO2)2COO-Li+, CH2C(CH3)2COO-Li+, Si(CH3)2(CH2)xC(CF3)2(CF2)SO3-Li+, Si(CH3)2(CH2)xC(CF3)2(CF2)COO-Li+, Si(CH2)xC(CF3)2(CF2)SO3-Li+, Si(CH2)xC(CF3)2(CF2)COO-Li+, Si(CF3)2(CF2)SO3-Li+, Si(CF3)2(CF2)yCOO-Li+, Si(CF2)ySO3-Li+, or Si(CF2)yCOO-Li+. The hydrophobic group is a single- or multiple-species group from (CH2)3CH3, (CH2)5CH3, (CH2)6CH3, Si(CH3)2C2H5, CF2CH3, C2H5, Si(C2H5)3, Si(CH3)3, Si(CH3)2C(CH3)2CH(CH3)2, SCN(CH3)2, Si(C6H5)2CH3, Si(CH3)2C6H5, SiH(CH3)2, or Si(CH3)2CH=CH2. The electrolyte solution is made of ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, methylethyl carbonate, tetrahydrofuran, 2-methyltetrahydrofuran, dimethoxyethane, methyl formate, ethyl formate, and/or gamma-butyrolactone. The co-solvent is acetone, dimethylformamide, dimethylsulfoxide, and/or N-methylpyrrolidone.x,y=0-10.Preferred Composition: The electrolyte solution is impregnated into the first polymer matrix and the second polymer matrix at 1-1000 wt.%, based on the total weight of polymers constituting the first polymer matrix and the second polymer matrix.    TECHNOLOGY FOCUS - POLYMERS - Preferred Material: The first porous polymer is polyethylene, polypropylene, polyimide, polysulfone, polyurethane, polyvinylchloride, cellulose, nylon, polyacrylonitrile, polyvinylidene fluoride, polytetrafluoroethylene, a copolymer or their blend. The second porous polymer is a vinylidene fluoride based polymer, an acrylate based polymer, a copolymer or their blend. The second porous polymer is a copolymer of vinylidene fluoride and hexafluoropropylene, a copolymer of vinylidene fluoride and trifluoroethylene, a copolymer of vinylidene fluoride and tetrafluoroethylene, polymethylacrylate, polyethylacrylate, polymethylmethacrylate, polyethylmethacrylate, polybutylacrylate, polybutylmethacrylate, polyvinylacetate, polyethylene oxide, polypropylene oxide, a copolymer or their blend. Preferred Parameter: The first polymer matrix has a thickness of 1-25 microns and the second polymer matrix has a thickness of 0.1-15 microns. EXAMPLE - 10 g Hydrophobic surface treated silica was dispersed in 400 mL of 1,2-dichloroethane and then vigorously stirred in a reactor at more than 400 rpm under a nitrogen atmosphere. At this time, a solution of chlorosulfonic acid in 1,2-dichloroethane was gradually added to the resultant mixture and stirred for 24 hours. A resultant polymer obtained by filtration of the reaction solution was dried, washed three times, and neutralized in a lithium hydroxide solution, to finally obtain a lithium cationic single-ion conducting inorganic filler. In order to manufacture a composite polymer electrolyte for a lithium secondary battery, first, a copolymer of vinylidene fluoride and hexafluoropropylene was dissolved with the lithium cationic single-ion conducting inorganic filler in acetone used as a co-solvent to obtain a uniform mixed solution. Here, the lithium cationic single-ion conducting inorganic filler was contained in the mixed solution at 20 wt.%, based on the total weight of polymers in the mixed solution. The mixed solution was cast on a porous polyethylene film and the co-solvent was then evaporated. As a result, a composite polymer matrix bilayer structure in which a compact microporous polymer matrix was coated on a surface of the porous polyethylene film was obtained. The obtained composite polymer matrix structure was transferred into a glove box of an argon atmosphere and then immersed in an electrolyte solution in which 1 M lithium hexafluorophosphate was contained in a mixture solvent (1:1, molar ratio of ethylene carbonate and dimethyl carbonate), to produce a polymer electrolyte. In order to measure a charge/discharge cycle, individual unit batteries were manufactured using the composite polymer electrolyte and the separation film/liquid electrolyte system.