Patent ID: 7220514
Filing Date: 2007-05-22
Classification: H01M,Y02E

Abstract:
1. A polymer electrolyte fuel cell comprising: a hydrogen ion conductive polymer electrolyte membrane; a pair of electrodes which have catalyst layers sandwiching said hydrogen ion conductive polymer electrolyte membrane therebetween and gas diffusion layers in contact with said catalyst layers; a conductive separator plate having a gas flow channel for supplying a fuel gas to one of said electrodes; and a conductive separator plate having a gas flow channel for supplying an oxidant gas to the other electrode, characterized in that said catalyst layers comprise a hydrogen ion conductive polymer electrolyte and conductive carbon particles carrying a catalyst metal, and the hydrogen ion conductive polymer electrolyte is provided in pores of an agglomerate structure of the conductive carbon particles, wherein the diameter of the hydrogen ion conductive polymer electrolyte is not smaller than 5 nm and not greater than 40 nm, and wherein the polymer electrolyte is in the form of particles.