Membrane-electrode assembly for a self-humidifying fuel cell

Details Membrane-electrode assembly for a self-humidifying fuel cell Membrane-electrode assembly for a self-humidifying fuel cell

H - Electricity

01

M

H01M 8/10 (2006.01) H01M 4/86 (2006.01) H01M 4/96 (2006.01)

Patent

CA 2459850

The invention relates to a membrane-electrode assembly for a self-humidifying fuel cell. The electrodes of the inventive MEA consist of a catalyst layer that is applied to the membrane side, a microporous electrode layer that borders said catalyst layer and a macroporous electrode layer immediately adjacent to said microporous layer. The latter comprises platelet-shaped graphite on the cathode side and on the anode side carbon black particles with a rough surface and the capacity to store water. As a result of the construction and the morphology of the respective electrode, the co-operation between the two electrodes of the MEA composite and their adaptation to one another, a mass flow is formed from the cathode to the anode, said flow favouring the back-diffusion of the reaction water through the electrolyte, thus guaranteeing sufficient humidification of the electrolyte.

L'invention concerne une unité d'électrodes à membrane destinée à une pile à combustible à humidification automatique. Les électrodes de ladite unité sont composées d'une couche catalytique appliquée côté membrane, d'une couche d'électrode microporeuse adjacente à la couche catalytique, et d'une couche d'électrode macroporeuse consécutive. Ladite couche d'électrode microporeuse comporte côté cathode du graphite en paillettes et côté anode des particules de noir de carbone présentant une surface rugueuse et la capacité de stocker de l'eau. En raison de la conception et de la morphologie de l'électrode respective, de l'interaction entre les deux électrodes dans l'unité d'électrodes à membrane, et de l'adaptation de l'une à l'autre, il y a création d'un flux massique de la cathode vers l'anode favorisant la rétrodiffusion de l'eau de réaction au travers de l'électrolyte, et assurant ainsi une humidification suffisante de l'électrolyte.

Affiliated with

Also associated with

Rating

Membrane-electrode assembly for a self-humidifying fuel cell does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Membrane-electrode assembly for a self-humidifying fuel cell, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Membrane-electrode assembly for a self-humidifying fuel cell will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1599722