Patent ID: 7445867
Filing Date: 2008-11-04
Classification: H01M,Y02E

Abstract:
1. An electrode structure for a polymer electrolyte fuel cell, comprising: a pair of electrode catalyst layers, and a polymer electrolyte membrane held between the electrode catalyst layers, said polymer electrolyte membrane comprising a sulfonation product of a polymer, wherein said polymer comprises a main chain having a plurality of divalent aromatic residues bound to one another directly or through oxy groups or divalent groups other than aromatic residues, and side chains comprising sulfonated aromatic groups, and wherein the number of divalent aromatic residues comprised in the main chain of said polymer is denoted by X, the number of oxy groups comprised in the main chain of said polymer is denoted by Y, and the value X/Y is within the range of from 2.0 to 9.0.