Patent ID: 6503652
Filing Date: 2003-01-07
Classification: C04B,H01M,Y02E,Y02P,Y10T

Abstract:
A method of manufacturing an electrode for an electrochemical fuel cell, comprising:(a) providing a sheet of compressed mass of expanded graphite particles having a plurality of perforations defined by walls of the expanded graphite particles, and the perforations passing through the sheet between first and second opposed surfaces of the sheet; (b) coating the sheet with a thermosettable organic resin, said coating step comprising filling a portion of said perforations with the thermosettable organic resin; (c) curing and baking the sheet, and reopening a portion of the filled perforations during the curing and baking step; and (d) activating the thermosettable organic resin to form a high surface area carbon on the walls of the perforations; wherein at least about 20% of the perforations of the sheet are both filled in step (b) and reopened in step (c).