Membraneless fuel cell and method of operating same

H - Electricity – 01 – M

Patent

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Details

H01M 8/00 (2006.01) H01M 4/86 (2006.01) H01M 4/92 (2006.01) H01M 8/06 (2006.01) H01M 8/22 (2006.01)

Patent

CA 2685798

A direct fuel cell comprises a cathode comprising electroactive catalyst material; and an anode assembly comprising an anode having a porous layer and electroactive catalyst material in the porous layer. The electrode characteristics of the anode assembly are selected so that fuel supplied to the anode is reacted within the anode so that cross-over from the anode to the cathode does not have more than a 10% negative effect on voltage or a 25 mV voltage loss when at peak power and steady state conditions. The anode and cathode each have a first major surface facing each other in non-electrical contact and without a microporous separator or ion exchange membrane therebetween.

La présente invention concerne une pile à combustible directe qui comprend une cathode comprenant un matériau catalytique électroactif ; et un ensemble anode comprenant une anode comportant une couche poreuse et un matériau catalytique électroactif dans la couche poreuse. Les caractéristiques d'électrode de l'ensemble anode sont choisies de sorte que le combustible fourni à l'anode est mis à réagir à l'intérieur de l'anode de sorte que le cross-over depuis l'anode vers la cathode n'a pas un effet négatif supérieur à 10 % sur la tension ou bien n'a pas une perte de tension de 25 mV dans des conditions de puissance de crête et d'état stable. L'anode et la cathode comportent chacune une première surface principale se faisant mutuellement face en contact non électrique et sans séparateur microporeux ou membrane échangeuse d'ions entre elles.

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