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Sulfonated poly(ether ether ketone)s with pendent amino groups (Am-SPEEKs) have been prepared for direct methanol fuel cells (DMFCs). With the goal of improving the dimensional stability and reducing the methanol permeability of membranes, Benzimidazole trimer is synthesized as a cross-linker. The cross-linking reaction is induced by heating at 120 °C for 6 h and then the effects of different contents...
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