Summary: Branched/crosslinked sulfonated polyimide membranes incorporating superior mechanical properties, high proton conductivity, and excellent fuel cell performance were successfully developed. The resulting polymer electrolytes displayed conductivity values of about 0.2 S · cm −1 at 120 °C and 100% relative humidity. In a single H 2 /O 2 fuel cell system at 90 °C, they exhibited reasonably high fuel cell performances comparable to that of Nafion 112. The structure of the branched/crosslinked sulfonated polyimide membranes studied here. image The structure of the branched/crosslinked sulfonated polyimide membranes studied here.
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Yin et al. (2005) studied this question.
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