Margaret S Fleming

US Patent:

20070218343, Sep 20, 2007

Filed:

Mar 17, 2006

Appl. No.:

11/378224

Inventors:

Chunxin Ji - Pennfield NY, US
Gerald Fleming - Wolfeboro NH, US
Margaret Fleming - Wolfeboro NH, US
Mark Mathias - Pittsford NY, US

International Classification:

H01M 4/94
H01M 4/88
C01D 3/00
H01M 4/96

US Classification:

429042000, 502101000, 423449600, 429044000, 423447200

Abstract:

Diffusion media for fuel cell is made by preparing an aqueous dispersion comprising a powder resin, a binder material, and a fiber material comprising carbon fibers, of these; forming a layer of the dispersion on a support; removing water from the layer to form a fiber layer; molding the fiber layer; and carbonizing or graphitizing the molded layer.

US Patent:

20070218346, Sep 20, 2007

Filed:

Mar 20, 2006

Appl. No.:

11/384706

Inventors:

Chunxin Ji - Pennfield NY, US
Gerald Fleming - Wolfeboro NH, US
Margaret Fleming - Wolfeboro NH, US
Mark Mathias - Pittsford NY, US

International Classification:

H01M 4/94
H01M 4/96
B32B 9/00
D01F 9/12

US Classification:

429044000, 428408000, 423447200

Abstract:

A gas diffusion media for a fuel cell, such as a proton exchange membrane fuel cell, is provided. The gas diffusion media includes carbonizable acrylic pulp fibers instead of conventional phenolic resin as a binder material. The acrylic fibers are mixed with the carbon fiber dispersion during the papermaking step, thus eliminating the phenolic resin impregnation step typically associated with conventional gas diffusion media manufacturing processes. The mat is then cured and carbonized to produce gas diffusion media.