Proton exchange membranes for fuel cell applications

Details Proton exchange membranes for fuel cell applications Proton exchange membranes for fuel cell applications

2011-03-01

2011-03-01

Lipman, Bernard (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C526S250000, C526S252000, C526S253000, C526S254000

Reexamination Certificate

active

07897691

ABSTRACT:
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.

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