| 摘要 |
A composite membrane structure is disclosed comprising a composite membrane and at least one protective layer disposed adjacent to the composite membrane. The composite membrane comprises a porous polymeric matrix and an ionically conductive solid, noble metal or combination thereof dispersed within the matrix, and preferably, a binder. The binder is preferably an ion exchange polymer. The protective layer comprises binder and ionically conductive solid, hygroscopic fine powder or a combination thereof.Also disclosed is a composite membrane comprising an ionically conductive solid, a binder and support polymer. The membrane is formed by casting a solution of the support polymer, ionically conductive solid and binder to form a film. The film may optionally be combined with a protective layer as described above.The cast composite membrane or the composite membrane structures, may be employed in a membrane electrode assembly (MEA) comprising a composite membrane structure or cast composite membrane, an anode, a cathode, and optional current collectors. |
