Patent ID: 8372539
Filing Date: 2013-02-12
Classification: H01M,Y02E

Abstract:
1. A substrate for the formation of a flow field plate for a proton exchange membrane fuel cell, the substrate comprising at least one resin-impregnated sheet of compressed particles of exfoliated graphite comprising two major surfaces, wherein the substrate is assembled in the proton exchange membrane fuel cell, the substrate having an active area with flow field channels thereon, wherein the flow field channels have a depth of from about 0.2 mm to about 2.0 mm, wherein the active area is provided with mirror image corrugations on each of the major surfaces, which form ridges and furrows, the sheet of compressed particles of exfoliated graphite having a local web thickness in the active area which is no more than about 40% greater than the minimum web thickness of the active area, wherein the at least one resin-impregnated sheet of compressed particles of exfoliated graphite has a density of at least about 1.5 g/cc.