Brennstoffzellenelektrode, Verfahren zur Herstellung und Brennstoffzelle mit solcher Elektrode

摘要

A fuel cell provides a high output at a high current density. The fuel cell has an anode electrode (24) and a cathode electrode (26) comprising a gas diffusion layer (6a, 6b), a water-repellent layer (30a, 30b) disposed on the gas diffusion layer (6a, 6b) and containing a carbon material and polytetrafluoroethylene, and an electrode catalyst layer (32a, 32b) disposed on the water-repellent layer (30a, 30b) and containing a carbon material carrying a catalyst. The electrode catalyst layer (32a, 32b) has maximum and minimum thicknesses that differ from each other by less than 30 mu m. The electrode catalyst layer (32a, 32b) has cracks whose area is less than 10 % of a total area of the electrode catalyst layer (32a, 32b).