Electrolyte polymer for fuel cells, process for its...

Details Electrolyte polymer for fuel cells, process for its... Electrolyte polymer for fuel cells, process for its...

2007-02-16

2010-11-23

Ryan, Patrick (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

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

Fuel cell with solid electrolyte

C521S027000, C521S030000

Reexamination Certificate

active

07838167

ABSTRACT:
To provide an electrolyte polymer for fuel cells, an electrolyte membrane, a membrane/electrode assembly for fuel cells excellent in the durability.An electrolyte polymer for fuel cells made of a perfluorocarbon polymer having ion exchange groups (which may contain etheric oxygen atoms), characterized in that the value calculated by dividing an absorption area SCHderived mainly from a C—H bond in the range of from 3,100 cm−1to 2,800 cm−1by an absorption area SCFderived mainly from a C—F bond in the range of from 2,700 cm−1to 2,000 cm−1, as measured by means of infrared spectrophotometry, is less than 0.005, an electrolyte membrane and a membrane/electrode assembly.

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