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Manuscript Abstract:
Electron beam cross-linked pore-filling electrolyte membranes (PF membranes)
with highly concentrated sulfonic acid groups were prepared by a modified
pore-filling method and an electron beam irradiation method. The pores of
the polyethylene microporous membrane were filled with cross-linked polymer
electrolytes with a high ion exchange capacity (5.1 meq g-1), derived from
poly(p-phenylene sulfonic acid-ran-2,5-benzophenone), vinylsulfonic acid,
and triallyl isocyanurate. The PF membrane exhibited very high proton
conductivity and good single cell performance (equal to or higher than a
commercial membrane, Nafion® HP) under wide range of humidity
conditions. The high proton conductivity appeared to be conferred by the
highly concentrated sulfonic acid groups in the membrane. The PF membrane
also showed low gas permeability and high mechanical durability in dry-wet
cycle test. Therefore, the fabricated PF membrane presents as a good
candidate for fuel cell applications under
various humidity conditions. |
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