Preparation and Application of Sulfonated Poly(arylene ether sulfone)/Heteropolyacid (H3PW12O40) Composite Membranes for Proton Exchange Membrane Fuel Cell
Date Issued
2012
Date
2012
Author(s)
Tsai, Po-Chung
Abstract
In this study, SPAES/HPA composite membranes were prepared for proton exchange membrane fuel cell (PEMFCs). Phosphotungstic acid, one kind of heteropolyacids (HPA), which was added into polymer materials made from sulfonated poly(arylene ether sulfone)s (SPAES) with pendent sulfonic acid was studied for being applied to H2/O2 PEMFC. This kind of random copolymer side-chain sulfonated poly(arylene ether sulfone)s was prepared by aromatic nucleophilic substitution（SNAr）polycondensation using the hydrophobic monomer 4,4''-difluorodiphenylsulfone (S), 4-(4-(4-Methoxyphenoxy) phenoxy)phenol (DH-3AE) and hydrophilic monomer bis[4-fluoro-3-（4-sulfophenyl）phenyl] sulfone (SPDS) all that we had successfully synthesized. SPAES/HPA composite membranes were prepared by casting procedure, using SPAES polymer solution and phosphotungstic acid mixtures. The physical and chemical properties include thermal properties of the membrane, water uptake, dimensional stability, proton conductivity, morphology and fuel cell power performances were measured and discussed in our study. The experimental results found that adding inorganic phosphotungstic acid into this polymer solution showed a higher water uptake compare with the native polymer materials. It was also found that it could obviously improve proton conductivity as well as performances.
Subjects
sulfonated poly(arylene ether sulfone)
fuel cell
proton exchange membrane
heteropolyacids(HPA)
proton conductivity
Type
thesis
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