Patent ID: 7629071
Filing Date: 2009-12-08
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A gas diffusion electrode suitable for use with a solid polymer electrolyte membrane, said gas diffusion electrode comprising: (a) a supporting layer, said supporting layer being an electrically-conductive, porous structure, wherein said supporting layer is carbon fiber paper; (b) a first cushioning layer, said first cushioning layer having a thickness of about 1 to 100 microns and being an electrically-conductive, porous structure consisting of a nonwoven mat of electrically-conductive fibers bound together with a first polymeric binder, wherein said electrically-conductive fibers are carbon nanofibers; and (c) a second cushioning layer, said second cushioning layer consisting of electrically-conductive particles and a second polymeric binder, said electrically-conductive particles consisting of carbon black; (d) wherein said first cushioning layer is positioned between said supporting layer and said second cushioning layer and is in direct contact with both said supporting layer and said second cushioning layer.