H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 12/02 (2006.01) B01D 53/22 (2006.01) B01D 71/32 (2006.01) H01M 8/02 (2006.01)
Patent
CA 2294258
A permeable membrane comprising a gas permeable substrate film and a layer of a polymeric perfluoro compound on the substrate exhibits selective transport of oxygen over water vapor and a metal-air electrochemical cell comprising such a membrane has enhanced control over its water content. Suitable polymeric perfluoro compounds include perfluoropolyalkylene oxides such as polyperfluoropropylene oxide or polyperfluoropropylene oxide co- perfluoroformaldehyde. The polymeric perfluoro compound layer is desirably cross-linked to form a thin layer on the substrate film or to form a self- supporting membrane. A suitable substrate film is a microporous polymer membrane.
L'invention concerne une membrane perméable comprenant un film substrat perméable aux gaz et une couche de composé perfluoro polymère sur le substrat, qui permet d'assurer le transport sélectif d'oxygène par la vapeur d'eau et une cellule électrochimique métal-air comprenant ladite membrane permet une régulation accrue de sa teneur en eau. Les composés perfluoro polymères appropriés sont les oxydes de perfluoropolyalkylène tels que l'oxyde de polyperfluoropropylène ou le co-perfluoroformaldéhyde d'oxyde de polyperfluoropropylène. La couche de composé perfluoro polymère est, de préférence, réticulée de sorte qu'elle forme une fine couche sur le film substrat ou une membrane autoporteuse. Le film substrat approprié est une membrane polymère microporeuse.
Brose Daniel John
Golovin Milton Neal
Reynolds Thomas Alan
Aer Energy Resources Inc.
Finlayson & Singlehurst
LandOfFree
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