Proton conductive membrane comprising a copolymer

Details Proton conductive membrane comprising a copolymer Proton conductive membrane comprising a copolymer

2004-12-08

2011-10-18

Gilliam, Barbara (Department: 1727)

Chemistry: electrical current producing apparatus, product, and

Fuel cell, subcombination thereof, or method of making or...

Fuel cell with solid electrolyte

C429S491000, C525S242000, C528S170000

Reexamination Certificate

active

08039165

ABSTRACT:
A proton conductive membrane capable of sufficient proton conductivity even at low humidities and low temperatures is provided. The proton conductive membrane includes a copolymer including an ion conductive polymer segment (A) and an ion nonconductive polymer segment (B) , the membrane absorbing water when it is soaked in 90° C. water for 30 minutes of which the quantity of water showing freezing temperatures in the range of −30 to 0° C. is 0.01 to 3.0 g based on 1 g of the copolymer. The copolymer has a structure in which main chain skeletons of the copolymer are covalently bound at aromatic rings thereof through binding groups.

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