ELECTRODE STRUCTURE FOR SOLID-POLYMER TYPE FUEL CELL

摘要

An electrode structure which has a pair of electrode catalyst layers (1) and (1) and a polymer electrolyte film(2) sandwiched between the electrode catalyst layers (1) and (1). The polymer electrolyte film (2) comprises a product of the sulfonation of a polymer comprising: a main chain comprising divalent aromatic residues bonded to one another directly or through an oxy group or a divalent group other than aromatic residues; and side chains comprising an aromatic group capable of being sulfonated. When the number of the divalent aromatic residues contained in the main chain of that polymer i s indicated by X and the number of the oxy groups contained therein is indicat ed by Y, then X/Y is in the range of from 2.0 to 9.0. Alternatively, when the number of the groups capable of being sulfonated contained in the main chain of that polymer, that of the divalent aromatic residues contained in the mai n chain and undergoing no sulfonation, and that of the oxy groups contained in the main chain are indicated by A, B, and C, respectively, then (B/C)x(B+C)- A is in the range of from 35 to 380.