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Zwitterion-coated graphene oxide (ZC-GO) containing ammonium and sulfonic acid groups was synthesized, and various amounts were incorporated into polybenzimidazole (PBI). The effect of the ZC-GO content on the properties of PBI/ZC-GO composite membranes for direct methanol fuel cell (DMFC) applications was investigated. The structure of ZC-GO was confirmed using Fourier-transform infrared spectroscopy,...
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