Membrane for selective transport of oxygen over water vapor and

Details Membrane for selective transport of oxygen over water vapor and Membrane for selective transport of oxygen over water vapor and

1997-06-17

1999-11-16

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 86, 428422, 428524, H01M 212, H01M 1206, B32B 2700

Patent

active

059854758

ABSTRACT:
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 crosslinked 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.

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