Patent ID: 7604887
Filing Date: 2009-10-20
Classification: H01B,H01M,Y02E

Abstract:
1. An electrolyte membrane having ionic conductivity, the electrolyte membrane comprising: a base material, and organic molecules containing ion exchange groups; wherein the organic molecules are chemically bonded to a surface of the base material to form an organic layer, wherein ions are conducted via the ion exchange groups in the organic layer, the base material is a porous membrane, wherein a plurality of through holes that pierce the porous membrane in a direction perpendicular to a surface of the porous membrane are formed in the porous membrane, the organic molecules are chemically, bonded to an inner surface of the through holes and form the organic layer, and in the through holes, a water repellent substance is further provided on a face of the organic layer on a side opposite to a face that is bonded to the base material, and the water-repellent substance fills gaps present in an inner portion of the through holes, wherein the water-repellent substance is a polymer of a precursor material of the water-repellent substance polymerized in capillaries that remain in an inner portion of the through hole, and a smallest cross-sectional area of each of the through holes is in a range of 3 nm