Patent ID: 6517964
Filing Date: 2003-02-11
Classification: H01M,Y02E

Abstract:
A membrane electrode assembly comprising:(a) a pair of electrodes, at least one of the electrodes being formed of a sheet of a compressed mass of expanded graphite particles having a plurality of transverse fluid channels passing through the sheet between first and second opposed surfaces of the sheet, the channels being separated by walls of compressed expandable graphite; (b) an ion exchange membrane having opposed surfaces positioned between the electrodes such that the walls formed on one of the opposed surfaces of the at least one electrode abuts the ion exchange membrane; and (c) a catalyst material disposed such that at least a portion of an opposed surface of the ion exchange membrane is adjacent the catalyst, wherein, the catalyst is supported on a catalyst support material which comprises elongate electrically anisotropic particles of expanded graphite, the particles of expanded graphite being from about 2 to about 50 microns in length.