Poly(arylene piperidinium) Hydroxide Ion Exchange Membranes: Synthesis, Alkaline Stability, and Conductivity

Abstract A series of poly(arylene piperidinium)s (PAPipQs) devoid of any alkali‐sensitive aryl ether bonds or benzylic sites are prepared and studied as anion exchange membranes (AEMs) for alkaline fuel cells. First, the excellent alkaline stability of the model compound 4,4‐diarylpiperidinium is confirmed. Medium molecular weight poly(arylene piperidine)s are then synthesized in polycondensations of N ‐methyl‐4‐piperidone and either bi‐ or terphenyl via superelectrophilic activation in triflic acid. Film‐forming PAPipQs are subsequently prepared in Menshutkin reactions with methyl, butyl, hexyl, and octyl halides, respectively. AEMs based on poly(terphenyl dimethylpiperidinium) show the best performance with…

• V
  Vetenskapsrådet
• E
  Energimyndigheten