Patent ID: 6759157
Filing Date: 2004-07-06
Classification: B01D,C08J,H01M,Y02E,Y02P

Abstract:
A method for making a proton conducting polymeric membrane, comprisingdissolving a polymer in an organic solvent to form a polymer solution; adding an oxyacid to the polymer solution; casting the oxyacid-containing polymer solution onto a casting surface; and removing the organic solvent so as to form a proton conducting polymeric membrane, wherein the oxyacid is selected from the group consisting of boric, carbonic, cyanic, isocyanic, silicic, nitric, nitrous, phosphoric, phosphorous, hypophosphorous, arsenic, arsenious, antimonic, sulfuric, sulfurous, selenic, selenious, telluric, chromic, dichromic, perchloric, chloric, chlorous, hypochlorous, bromic, bromous, hypobromous, periodic, iodic, hypoiodous, permanganic, manganic, pertechnetic, technetic, perrhennic, rehnnic acids, and their condensation products and optionally bears one or more groups selected from the group consisting of alkyl, fluoroalkyl, alkoxy, flouroalkoxy, alkylamino, fluoroalkylamino, aryl, aryloxy, and arylamino groups, and wherein the aryl, aryloxy or arylamino groups optionally bear one or more functionality selected from the group consisting of halo, alkyl, fluoroalkyl, alkoxy, fluoroalkoxy, alkylamino, and fluoroalkylamino groups.