Polymer electrolyte membrane

Details Polymer electrolyte membrane Polymer electrolyte membrane

2002-12-19

2008-03-25

Bell, Bruce F. (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S006000, C521S027000

Reexamination Certificate

active

07348088

ABSTRACT:
A polymer electrolyte membrane is provided having a thickness of 90 microns or less and comprising a polymer, said polymer comprising a highly fluorinated backbone and recurring pendant groups according to the formula:in-line-formulae description="In-line Formulae" end="lead"?YOSO2—CF2—CF2—CF2—CF2—O-[polymer backbone]  (I)in-line-formulae description="In-line Formulae" end="tail"?where Y is H+or a monovalent cation such as an alkali metal cation. Typically, the membrane is a cast membrane. Typically, the polymer has a hydration product of greater than 22,000. Typically, the polymer has an equivalent weight of 800-1200.

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