Diffusion media with microporous layer

Details Diffusion media with microporous layer Diffusion media with microporous layer

2006-06-20

2006-06-20

Ryan, Patrick Joseph (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Having earth feature

C429S047000, C429S047000

Reexamination Certificate

active

07063913

ABSTRACT:
Specially prepared gas diffusion media improve the performance of PEM fuel cells. The media are made by first dipping an electrically conductive porous material such as carbon fiber paper into a suspension of hydrophobic polymer and drying the paper to create a desired deposition pattern of hydrophobic polymer on the substrate. Then a paste containing a fluorocarbon polymer and carbon particles is applied to a desired side of the substrate, and thereafter the paste and hydrophobic polymer are sintered together at high temperature on the paper. In particular, nonionic surfactants remain on the carbon fiber paper after the initial hydrophobic polymer is applied to the electrically conductive porous material. When the paste is coated on the dried paper, the paste is in contact with a hydrophilic surface.

REFERENCES:
patent: 5718947 (1998-02-01), Martin et al.
patent: 6350539 (2002-02-01), Wood, III et al.
patent: 2004/0038808 (2004-02-01), Hampden-Smith et al.
patent: 2005/0084742 (2005-04-01), Angelopoulos et al.

Affiliated with

Also associated with

Rating

Diffusion media with microporous layer 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 with microporous layer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diffusion media with microporous layer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3683137