Phosphonium-Functionalized Polyethylene: A New Class of Base-Stable Alkaline Anion Exchange Membranes

A tetrakis(dialkylamino)phosphonium cation was evaluated as a functional group for alkaline anion exchange membranes (AAEMs). The base stability of [P(N(Me)Cy)4]+ was directly compared to that of [BnNMe3]+ in 1 M NaOD/CD3OD. The high base stability of [P(N(Me)Cy)4]+ relative to [BnNMe3]+ ins...

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Veröffentlicht in:	J. Am. Chem. Soc 2012-11, Vol.134 (44), p.18161-18164
Hauptverfasser:	Noonan, Kevin J. T, Hugar, Kristina M, Kostalik, Henry A, Lobkovsky, Emil B, Abruña, Héctor D, Coates, Geoffrey W
Format:	Artikel
Sprache:	eng
Schlagworte:	catalysis (homogeneous), catalysis (heterogeneous), energy storage (including batteries and capacitors), hydrogen and fuel cells, defects, charge transport, membrane, materials and chemistry by design, synthesis (novel materials), synthesis (self-assembly), synthesis (scalable processing)
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Zusammenfassung:	A tetrakis(dialkylamino)phosphonium cation was evaluated as a functional group for alkaline anion exchange membranes (AAEMs). The base stability of [P(N(Me)Cy)4]+ was directly compared to that of [BnNMe3]+ in 1 M NaOD/CD3OD. The high base stability of [P(N(Me)Cy)4]+ relative to [BnNMe3]+ inspired the preparation of AAEM materials composed of phosphonium units attached to polyethylene. The AAEMs (hydroxide conductivity of 22 ± 1 mS cm–1 at 22 °C) were prepared using ring-opening metathesis polymerization, and their stabilities were evaluated in 15 M KOH at 22 °C and in 1 M KOH at 80 °C.
ISSN:	0002-7863 1520-5126
DOI:	10.1021/ja307466s