H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 4/94 (2006.01) H01M 2/00 (2006.01)
Patent
CA 2146332
An electrochemical fuel cell is provided for converting a fuel reactant stream and an oxidant reactant stream to a reaction product stream and electrical energy. The fuel cell includes a membrane electrode assembly (52) interposed between two separator layers (54, 56). The separator layers are formed of thin electrically conductive sheet material which is substantially impermeable to the fuel and oxidant reactant streams. The membrane electrode assembly comprises first and second electrode layers (64, 66) formed of porous electrically conductive sheet material. The electrode layers have a catalyst associated therewith, and an ion exchange membrane is interposed between the first and second electrode layers. The electrode layers include passages, such as the interstitial spaces within the electrode material or grooves (64a, 66a) formed in the surface of the electrode material, for flowing a reactant stream between an inlet and outlet within the electrode layer.
Cette invention concerne une pile à combustible servant à produire de l'énergie électrique et un flux de produit de réaction à partir d'un flux de réactif combustible et d'un flux de réactif comburant. La pile à combustible comprend une électrode à membrane (52) disposée entre deux couches de matériau séparateur (54, 56) formé de feuilles minces conductrices essentiellement imperméables aux flux de combustible et de comburant. L'électrode à membrane comporte une première et une seconde couches (64, 66), faites de matériau mince conducteur et poreux et revêtues d'un catalyseur, une membrane échangeuse d'ions étant interposée entre elles. Les couches conductrices comportent des passages sous forme de vides interstitiels ou des gorges (64a, 66a) servant à véhiculer les réactifs entre un orifice d'entrée et un orifice de sortie de l'ensemble électrode multicouche.
Prater Keith B.
Voss Henry H.
Wilkinson David Pentreath
Ballard Power Systems Inc.
Borden Ladner Gervais Llp
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