Patent ID: 8048550

Claim:
A fuel cell, comprising: (a) a bipolar plate; (b) a membrane electrode assembly; and (c) a gasket interposed between said plate and said assembly, said gasket cured from an admixture comprising: (1) fluoroelastomer particulate derived from vinylidene-fluoride, hexafluoropropene, and tetrafluoroethylene, said fluoroelastomer having: (i) a Mooney viscosity from about 25 to about 75, (ii) fluorine from about 65 to about 69 atomic weight percent, (iii) at least 90 weight percent fluoroterpolymer, and (iv) halogenated crosslink sites; (2) inert particulate from about 10 to about 50 parts per 100 parts by weight of said fluoroelastomer particulate, said inert particulate having particle sizes less than about 250 mesh; (3) curing agent from about 0.5 to about 20 parts per 100 parts by weight of said fluoroelastomer particulate, wherein said curing agent crosslinks said fluoroelastomer particulate to generate cured fluoroelastomer and hydrogen ions; and (4) magnesium oxide particulate from about 5 to about 50 parts per 100 parts by weight of said fluoroelastomer particulate, said magnesium oxide particulate having particle sizes less than about 250 mesh, and having a BET surface area from about 40 to about 70 square meters per gram.