A bilayer or trilayer composite ion exchange membrane suitable for use in a fuel cell. The composite membrane has a high equivalent weight thick layer in order to provide sufficient strength and low equivalent weight surface layers for improved electrical performance in a fuel cell. In use, the composite membrane is provided with electrode surface layers. The composite membrane can be composed of a sulfonic fluoropolymer in both core and surface layers.
STATEMENT OF GOVERNMENT INTEREST
This invention was made with the support of the United States Government under Contract DE-AC02-90CH10435 awarded by the Department of Energy. The Government has certain rights to this invention.