Constructing Anhydrous Hydrogen-Bonding Network in a Sulfonated Polymer Based Membrane for High Temperature Fuel Cell Applications
Here we report an anhydrous hydrogen-bond fusing strategy for high-performance PEMs by introducing hydroxyl functionalized IL (IL-OH) into the SPs. The IL-OHs selected as both proton donators and acceptors, that are evidenced to be strongly hydrogen-bonded with both Nafion and some nano-inorganic matters. Consequently, an effective interconnected hydrogen-bond network forms in a HFIL/SP based hybrid membrane, endowing the PEM with robust mechanical and thermal stability. At temperatures >430K , the anhydrous ionic conductivity of this kind of PEM can reach higher than 50 mS cm-1 with a large proton transfer number close to 1. And the initial high performance of the assembled intermediate-temperature H2-O2 FCs showed promising applications of this new generation HFIL/SP PEMs.
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