Preparation of Sulfonated Poly（arylene ether sulfone）Membrane and The Performance for Proton Exchange Membrane Fuel Cell
Date Issued
2011
Date
2011
Author(s)
Ko, Tsung-Han
Abstract
In this studies,novel monomers containing two phenyl groups has been synthesized by bromination of bis（4-fluorophenyl） sulfone, via Suzuki coupling with benzeneboronic acid. The resulting monomers were converted to the corresponding sulfonated monomers having two pendent sulfonic acid groups.
Aromatic nucleophilic substitution （SNAr） polycondensation using the disulfonated monomers provided sulfonated poly（arylene ether sulfone） polymers P1 and P2.
Flexible and tough membranes having high mechanical strength were obtained by solution casting of all two series of polymers.
The polymers with two pendent sulfonic acid groups had high proton conductivities in the range of 57-183 mS/cm for P2-xx at 70°C, respectively. The methanol permeabilities of these polymers were in the range of （0.35-1.368 cm2/s）, which is lower than Nafion （1.45 cm2/s）.
In proton exchange membrane fuel cell test, P2-70 membranes showed the good cell performance. This study suggests that the P2 membranes also have high potential for direct methanol fuel cell application.
Subjects
Sulfonated Poly（arylene ether sulfone）
fuel cell
proton exchange membrane
Type
thesis
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