Ion-conducting membrane for fuel cell
AssigneeDais Analytic Corporation
InventorsBashir Musse Sheikh-Ali, Gary Edmund Wnek
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Abstract
Ion-conducting membranes for fuel cells are disclosed. The membrane is composed of a hydrogenated and sulfonated statistical copolymer of styrene and butadiene. A preferred membrane is obtained by hydrogenating a copolymer of styrene and butadiene to obtain less than five percent residual unsaturation, then sulfonating the polymer with an acetyl sulfate sulfonation agent to a level of at least 30 mol % percent sulfonate.
Claims5
A water-insoluble proton-conducting statistical copolymer comprising structural units of formula (I), (II), (III) and (IV) ##STR2## wherein m, n, p and q are integers from 250-10,000 and q is from 20% to 80% of the quantity (p+q).
Dependencies are inferred from the claim text.