Composite membrane
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United States of America Patent
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Oct 31, 2006
Grant Date -
Jan 15, 2004
app pub date -
May 2, 2003
filing date -
May 3, 2002
priority date (Note) -
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Abstract
The present invention relates to a composite membrane comprising at least one ion-conducting polymer and a network of randomly orientated individual fibers, wherein there is a continuous region of the membrane at one or both of the membrane faces wherein the density of fibers is lower than the density of fibers in the membrane as a whole. The invention further relates to processes for manufacturing membranes according to the invention, and membrane electrode assemblies comprising membranes according to the invention.
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