Fuel cell with increased generation efficiency

Details Fuel cell with increased generation efficiency Fuel cell with increased generation efficiency

H - Electricity

01

M

H01M 4/86 (2006.01) H01M 4/96 (2006.01) H01M 8/02 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2513431

A fuel cell wherein a positive electrode layer (13) and a negative electrode layer (14) are formed on both sides of an electrolyte membrane (12), respectively and wherein hydrogen is brought into contact with the catalyst of the negative electrode layer and oxygen is brought into contact with the catalyst of the positive electrode layer. The positive electrode layer contains an electrolyte, carbon (36, 37), a catalyst (38) supported by the carbon, a pore-forming material, and a water-repelling resin. In the region of the positive electrode layer near the electrolyte membrane (34), the reaction between oxygen and hydrogen progresses at high speed. Accordingly the weight ratio between the electrolyte and carbon is made high and the amount of catalyst supported is increased. In the region where the produced water tends to stay, the amount of pore-forming material and the amount of water-repelling resin are increased.

L'invention concerne une pile à combustible dans laquelle une couche électrode positive (13) et une couche électrode négative (14) sont formées sur les deux côtés d'une membrane électrolytique (12), respectivement, et dans laquelle de l'hydrogène est mis en contact avec le catalyseur de la couche électrode négative et de l'oxygène est mis en contact avec le catalyseur de la couche électrode positive. La couche électrode positive contient un électrolyte, du carbone (36, 37), un catalyseur (38) supporté par le carbone, un porogène, et une résine hydrorésistante. Dans la zone de la couche électrode positive à proximité de la membrane électrolytique (34), la réaction entre l'oxygène et l'hydrogène progresse à grande vitesse. Cela a pour effet d'augmenter le rapport pondéral entre l'électrolyte et le carbone, ainsi que la quantité de catalyseur supporté. Dans la zone où l'eau produite tend à rester, la quantité de porogène et la quantité de résine hydrorésistante augmentent.

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