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The effect of cerium ions (Ce3+) on the anti-oxidation and other properties of sulfonated poly(ether ether ketone) (sPEEK) membrane was studied, as it quenches the hydroxyl radicals, the major oxidation promoter in fuel cell operation. Cerium (Ce) was introduced along with 18-crown-6-ether to form a coordination complex to prevent both the migration of Ce3+ ions from the membranes and the direct interaction...
Sulfonated poly(ether ether ketone)/polyethyleneimine (sPEEK/PEI) composite membranes were prepared to reduce the water uptake and methanol permeability of highly sulfonated PEEK membranes (>65%). Incorporation of small amounts of PEI reduced ionic cluster size via electrostatic complex formation between anionic sulfonic groups of the sPEEK and the cationic amine groups of the PEI, and thus affected...
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