Claims

1. A polymer electrolyte formed by the method comprising:(a) obtaining a mixture in an oily phase by adding a solvent to a surfactant;(b) soaking an ionic conductive polymer membrane in the mixture, stirring and adding an ionic conductive material and pure water to the mixture, and neutralizing the mixture with a base;(c) adding a precursor of a porous support to the mixture and mixing the mixture; and(d) drawing the ionic conductive polymer membrane out of the mixture and washing and drying the ionic conductive polymer membrane,wherein inorganic conductive nano-particles are impregnated into at least one selected from the group consisting of micro-channels of the ionic conductive polymer membrane, and polymer backbone of the ionic conductive polymer membrane the micro-channels being formed by agglomeration of polar portions of an ionic conductive polymer constituting the ionic conductive polymer membrane.

2. The polymer electrolyte of claim 1, wherein the ionic conductive material is at least one selected from the group consisting of a heteropoly acid of formula (1) below, a phosphoric acid of formula (2) below, a sulfuric acid, and salts of these materials: ##STR00003## where X is one selected from the group consisting of boron (B), aluminum (Al), gallium (Ga), tin (Sn), phosphorous (P), antimony (Sb), tellurium (Te), iodine (I), and transition metals; Y is a transition metal; m1 is an integer from 1 to 10; n1 is an integer from 2 to 100, R is selected from the group consisting of C1-C20 hydroxyalkyl, C1-C20 alkyl, phenyl, phenyl substituted with C1-C20 alkyl group, vinyl, C1-C20 halogenated alkyl, halogenated phenyl, halogenated methylphenyl, and amine groups; m2 is an integer from 1 to 10; and n2 is an integer from 0 to 20.

3. The polymer electrolyte of claim 1, wherein the solvent in step (a) is at least one selected from the group consisting of isooctane, n-hexane, cyclohexane, dodecane, toluene, decane, heptane, hexadecane, and 1-hexanol, and an amount of the solvent is in the range of 8000 to 12000 parts by weight based on 100 parts by weight the ionic conductive material.

4. The polymer electrolyte of claim 1, wherein the surfactant in step (a) comprises a non-ionic surfactant selected from the group consisting of benzyltrimethylammonium hydroxide, polyoxyethylene nonylphenylether, and polyoxyethylene dodecylether, and an ionic surfactant selected from the group consisting of dioctyl sulfosuccinate, sorbitan monoleate, sorbitan monopalmitate, sorbitan sesquioleate, and sodium bis(2-ethylhexyl)sulfoxylmate.

5. The polymer electrolyte of claim 1, wherein an amount of the pure water in step (b) is in the range of 1-10 parts by weight based on 100 parts by weight the ionic conductive polymer constituting the ionic conductive polymer membrane, and the base in step (b) is one selected from the group consisting of ammonia water and sodium hydroxide.

6. The polymer electrolyte of claim 1, wherein the precursor of the porous support in step (c) is at least one selected from the group consisting of zirconium alkoxide, titanium alkoxide, silicon alkoxide, and aluminum alkoxide, and an amount of the precursor is in the range of 5-90 parts by weight based on 100 parts by weight the ionic conductive material.

7. The polymer electrolyte of claim 1, wherein an alcoholic solvent is used as a washing solvent in step (d), and the drying is performed at a temperature of 80-120.