Chemistry: electrical current producing apparatus – product – and – Fuel cell – subcombination thereof – or method of making or... – Method of making a fuel cell – fuel cell stack – or...
Reexamination Certificate
2011-06-07
2011-06-07
Walker, K (Department: 1726)
Chemistry: electrical current producing apparatus, product, and
Fuel cell, subcombination thereof, or method of making or...
Method of making a fuel cell, fuel cell stack, or...
C429S492000
Reexamination Certificate
active
07955758
ABSTRACT:
A technique for fabricating an MEA. The technique includes providing a polymer electrolyte proton conducting membrane, and then spraying a catalyst ink directly on the membrane to form a catalyst layer. In one embodiment, the catalyst ink includes the proper ionomer to carbon ratio, such as 0.8/1, for the desired fuel cell performance. In another embodiment, the catalyst ink includes too little ionomer for the proper ionomer to carbon ratio for the desired fuel cell performance. An ionomer layer is sprayed on the membrane before the catalyst layer to provide the proper final ionomer to carbon ratio.
REFERENCES:
patent: 5234777 (1993-08-01), Wilson
patent: 5316871 (1994-05-01), Swathirajan et al.
patent: 5330860 (1994-07-01), Grot et al.
patent: 6074692 (2000-06-01), Hulett
patent: 6277513 (2001-08-01), Swathirajan et al.
patent: 6524736 (2003-02-01), Sompalli et al.
patent: 7232624 (2007-06-01), Kim
patent: 7316794 (2008-01-01), O'Brien
patent: 2002/0034675 (2002-03-01), Starz et al.
patent: WO 03/095509 (2003-11-01), None
Wilson, M.S., Gottesfeld, S., “Thin-Film Catalyst Layers for Polymer Electrolyte Fuel Cell Electrodes”, Journal of Applied Electrochemistry 22 (1992) 1-7.
Doyle John C.
Yan Susan G.
GM Global Technology Operations LLC
Miller John A.
Miller IP Group, PLC
Walker K
LandOfFree
Membrane electrode assembly prepared by direct spray of... 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 prepared by direct spray of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Membrane electrode assembly prepared by direct spray of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2679561