摘要:
A polymer useful as an ion conducting membrane for fuel cell applications includes both main chain and side chain protogenic groups. Methods for preparing the polymer include addition of the side chains both before and after addition of the protogenic groups.
摘要:
A polymer useful as an ion conducting membrane for fuel cell applications includes both main chain and side chain protogenic groups. Methods for preparing the polymer include addition of the side chains both before and after addition of the protogenic groups.
摘要:
A composite membrane for fuel cell applications includes a support substrate with a predefined void volume. The void volume is at least partially filled with an ion conducting polymer composition that includes an additive that inhibits polymer degradation. Characteristically, the ion conducting polymer composition includes a first polymer with a cyclobutyl moiety and a second polymer that is different than the first polymer.
摘要:
An ion conducting membrane for fuel cell applications includes an ion conducting polymer and a porphyrin-containing compound at least partially dispersed within the ion conducting polymer. The ion conducting membranes exhibit improved performance over membranes not incorporating such porphyrin-containing compounds.
摘要:
An ion conducting membrane for fuel cell applications includes an ion conducting polymer and a tin-containing compound at least partially dispersed within the ion conducting polymer. The ion conducting membranes exhibit improved performance over membranes not incorporating such tin-containing compounds.
摘要:
A membrane humidifier assembly includes a first flow field plate adapted to facilitate flow of a first gas thereto and a second flow field plate adapted to facilitate flow of a second gas thereto. A polymeric membrane is disposed between the first and second flow fields and adapted to permit transfer of water from the first flow field plate to the second flow field plate. The polymeric membrane includes a polymer having perfluorocyclobutyl groups and a pendant side chain having a protogenic group.
摘要:
A solid electrochemical cell membrane composition comprises a hydrocarbon polymeric main chain and a perfluorinated superacid side group. A method of producing the membrane composition is also disclosed.
摘要:
In one embodiment, a copolymer comprises a sulfonatable segment covalently linked to an un-sulfonatable segment through an organic linking group. The sulfonatable group segment may be sulfonated through direction sulfonation or sulfonation through a spacer molecule. In another embodiment, a copolymer comprises a sulfonated segment and an unsulfonated segment. A membrane electrode assembly and a fuel cell may be produced using the copolymer.
摘要:
A proton conductive graft polymer comprises at least a structure unit of a sulfonated polymer side chain covalently attached to a hydrophobic perfluorocyclobutane polymer main chain. The sulfonated condensation polymer side chain has a high local ion exchange capacity while the main polymer chain is substantially free of sulfonic acid group. A membrane made from the graft polymer can provide good mechanical properties and high proton conductivity at wide range of humidity and temperatures.
摘要:
A polymer blend useful as an ion conductor in fuel cells includes a first polymer having a cyclobutyl moiety and a second polymer include a sulfonic acid group.