Passive recovery of liquid water produced by fuel cells

Details Passive recovery of liquid water produced by fuel cells Passive recovery of liquid water produced by fuel cells

H - Electricity

01

M

H01M 8/10 (2006.01)

Patent

CA 2668583

Passive recovery of liquid water from the cathode side of a polymer electrolyte membrane through the design of layers on the cathode side of an MEA and through the design of the PEM, may be used to supply water to support chemical or electrochemical reactions, either internal or external to the fuel cell, to support the humidification or hydration of the anode reactants, or to support the hydration of the polymer electrolyte membrane over its major surface or some combination thereof. Such passive recovery of liquid water can simplify fuel cell power generators through the reduction or elimination of cathode liquid water recovery devices.

L'invention concerne la récupération passive d'eau liquide à partir du côté cathode d'une membrane échangeuse de protons grâce à la configuration des couches sur le côté cathode d'un ensemble électrode à membrane (MEA) et à la configuration de la membrane échangeuse de protons (PEM). Cette récupération peut être utilisée pour fournir de l'eau destinée à favoriser des réactions chimiques ou électrochimiques, tant à l'intérieur qu'à l'extérieur de la pile à combustible, à favoriser l'humidification ou l'hydratation des réactifs d'anode, ou à favoriser l'hydratation de la membrane échangeuse de protons sur sa surface principale, voire une combinaison de ces possibilités. Ladite récupération passive d'eau liquide permet de simplifier les générateurs d'électricité à pile à combustible par réduction ou suppression des dispositifs de récupération d'eau liquide côté cathode.

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