Diffusion media, fuel cells, and fuel cell powered systems

Details Diffusion media, fuel cells, and fuel cell powered systems Diffusion media, fuel cells, and fuel cell powered systems

2007-12-04

2007-12-04

Cantelmo, Gregg (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Having earth feature

C429S006000, C429S006000

Reexamination Certificate

active

10685346

ABSTRACT:
A porous diffusion media according to the present invention is positioned against a catalyst layer of the membrane electrode assembly, the porous matrix comprises carbon paper, and the water transfer particles comprise carbon fibers or powders. Relatively high and relatively low water transfer particle density regions alternate across the porous diffusion media. A first major face of the media may be collectively more hydrophilic than the second major face and the second major face may be collectively more hydrophobic than the first major face. The diffusion media is positioned against the catalyst layer along the first major face of the diffusion media and against a flow field of the fuel cell along the second major face of the diffusion media. The porous diffusion media comprises hydrophobic material disposed along the second major face of the diffusion media.

REFERENCES:
patent: 5350643 (1994-09-01), Imahashi et al.
patent: 5952119 (1999-09-01), Wilson
patent: 5998058 (1999-12-01), Fredley
patent: 6024848 (2000-02-01), Dufner et al.
patent: 6127059 (2000-10-01), Kato
patent: 6194094 (2001-02-01), Sugawara et al.
patent: 6280870 (2001-08-01), Eisman et al.
patent: 6280872 (2001-08-01), Ozaki et al.
patent: 6303245 (2001-10-01), Nelson
patent: 6350539 (2002-02-01), Wood et al.
patent: 6365293 (2002-04-01), Isono et al.
patent: 6368476 (2002-04-01), DeMarinis et al.
patent: 2002/0051901 (2002-05-01), Zuber et al.
patent: 0 846 347 (1998-06-01), None
patent: 0 872 907 (1998-10-01), None
patent: 872907 (1998-10-01), None
patent: WO 01/04980 (2001-01-01), None
patent: WO 01/04980 (2001-01-01), None
“Contact angles from Wikipedia” http://en.wikipedia.org/wiki/Contact—angle.

Affiliated with

Also associated with

Rating

Diffusion media, fuel cells, and fuel cell powered systems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Diffusion media, fuel cells, and fuel cell powered systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diffusion media, fuel cells, and fuel cell powered systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3864477