H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 4/86 (2006.01) H01M 8/04 (2006.01)
Patent
CA 2348789
A polymer electrolyte membrane fuel cell assembly (10) has an anode side (12) and a cathode side (14) separated by the membrane (16) and generating electrical current by electrochemical reactions between a fuel gas and an oxidant. The anode side (12) comprises a hydrophobic gas diffusion backing (24) contacting one side of the membrane (16) and having hydrophilic areas therein for providing liquid water directly to the one side of the membrane (16) through the hydrophilic areas of the gas diffusion backing (24). In a preferred embodiment, the hydrophilic areas of the gas diffusion backing (24) are formed by sewing a hydrophilic thread (34) through the gas diffusion backing (24).
Un ensemble pile à combustible à membrane et électrolyte polymère (10) comporte un côté anode (12) et un côté cathode (14), séparés par la membrane et générant du courant électrique par des réactions électrochimiques entre un gaz combustible et un oxydant. Le côté anode (12) comporte une plaque arrière de diffusion de gaz (24), en contact avec un côté de la membrane (16) et contenant des zones hydrophiles permettant la fourniture d'eau liquide directement à un côté de la membrane (16), à travers lesdites zones de la plaque arrière de diffusion de gaz (24). Dans un mode de réalisation préféré, on forme les zones hydrophiles de la plaque arrière de diffusion de gaz (24) en cousant un fil hydrophile (34) dans celle-ci (24).
Finlayson & Singlehurst
The Regents Of The University Of California
LandOfFree
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