The proton exchange membrane was prepared by
covalent cross-linking sulfonated-sulfinated polyetheretherketone.
The cross-linked membrane showed high proton conductivity (0.04
S/cm) with suitable water uptake, low methanol permeability (2.21 ×
10-7 cm2/s) and good electrochemical stability. The results
suggested that cross-linked polyetheretherketone membrane is
particularly promising to be used as proton exchange membrane for
the direct methanol fuel cell application.
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