Patent ID: 7625651
Filing Date: 2009-12-01
Classification: C08J,H01B,H01M,Y02E,Y02P

Abstract:
1. A polymer electrolyte comprising: an ionic conductive polymer membrane; and inorganic conductive nano-particles including an ionic conductive material impregnated into a porous support, wherein the inorganic conductive nano-particles are impregnated into at least one selected from the group of microchannels formed by aggregation of polar portions of the ionic conductive polymer membrane, and between polymer backbones of the ionic conductive polymer membrane, wherein the ionic conductive material is a heteropoly acid of formula (1) below: 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, wherein the porous support is at least one selected from the group consisting of silica, alumina, zirconia, zeolite, and titania, and the porous support has a pore size of from 0.1 to 50 nm, and an amount of the porous support is in the range of 10-90 parts by weight based on 100 parts by weight the inorganic conductive nano-particles, an amount of the ionic conductive material is in the range of 10-90 parts by weight based on the inorganic conductive nano-particles, and an amount of the ionic conductive nano-particles is in the range of 3-90 parts by weight based on 100 parts by weight the polymer electrolyte, and a mixed weight ratio of the porous support and the ionic conductive material is 1:9 to 9:1, and the ionic conductive polymer membrane comprises at least one ionic conductive polymer selected from the group consisting of a 4-fluorinated sulfonated polymer and a benzene sulfonated polymer membrane having a benzene ring; wherein the inorganic conductive nano-particles have a size of from about 0.1 to about 50 nm; and wherein the ionic conductive polymer membrane has a thickness of from 30 to 200 μm.