Patent ID: 7527887
Filing Date: 2009-05-05
Classification: C08J,H01B,H01M,Y02E

Abstract:
1. A structure of the proton exchange membranes with different molecular permeabilities, wherein its structure includes a polymer substrate phase and a nano-scale cationic exchange group aggregate uniformly distributed in the polymer substrate phase, with its physical characteristics in that the rate of reverse permeability of the water molecules on the cathode back to the anode in the proton exchange membrane structure is greater than the permeability of methanol molecules from the anode to the cathode, wherein the methanol permeability is less than 1*10 −6 cm 2 /sec and proton conductivity is larger than 1*10 −2 S/cm in methanol solutions, wherein organic polymer membrane substrate is added with non-fluoro resin to form a composite membrane, and wherein the non-fluoro resin is any one of those selected from the group consisted of polyacrylate, polyester, polyetheretherketone, polysulfone (PSF), polyether, polyamide, polyphenylene oxide and polyethylene oxide.