Ether-bond-free polyfluorene
(PBF) anion exchange membranes (AEMs) containing flexible alkyl pendent
chains terminated with piperidinium cations were prepared via one-pot,
superacid-catalyzed polycondensation and a subsequent quaternization
reaction. Hydrophilic and hydrophobic microphase segregation was observed
in all AEMs. The hydroxide conductivity of PBF2-Br reaches up to 86
mS cm–1 at 80 °C, and 1H NMR showed
no measurable degradation after alkaline treatment in aqueous NaOH
(1 M) solution for 1200 h at 80 °C. Besides, a peak power density
of 410 mW cm–2 was achieved at 60 °C for an
alkaline fuel cell using the selected PBF1-OH (OH– form) as AEM.
Membrane electrode assemblies (MEAs) serve as the core units of polymer electrolyte membrane fuel cells (PEMFCs) and are regularly fabricated by painting a slurry of commercial Pt/C onto membrane, leading...
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