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AssigneeDaimler AG
InventorsSean M. MacKinnon, Scott J. McDermid, Lukas M. Bonorand, Timothy J. Peckham, Keping Wang, Jing Li
Estimating the term…
A water insoluble additive for improving the performance of an ion-exchange membrane, such as in the context of the high temperature operation of electrochemical fuel cells. The insoluble additive comprises a metal oxide cross-linked matrix having proton conducting groups covalently attached to the matrix through linkers. In one embodiment, the metal is silicon and the cross-linked matrix is a siloxane cross-linked matrix containing silicon atoms cross-linked by multiple disiloxy bonds and having proton conducting groups covalently attached to the silicon atoms through alkanediyl linkers.
A membrane electrode assembly comprising an ion-exchange membrane which comprises an ionomer and a water insoluble additive, the water insoluble additive comprising a metal oxide cross-linked matrix having proton-conducting groups covalently attached to the metal atoms through linkers, and wherein the metal is silicon, titanium, zirconium, germanium, aluminum, tin, or a combination thereof, with the proviso that the proton-conducting groups are not all phosphonic acid groups.
Dependencies are inferred from the claim text.