MEMBRAN ZUM SELEKTIVEN TRANSPORT VON SAUERSTOFF GEGENÜBER WASSERDAMPF UND ELEKTROCHEMISCHE METALL-LUFT-ZELLE MIT DIESER MEMBRAN

摘要

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.