Simon Fraser University

Thomas Weissbach

Andrew J Wright

Steven Holdcroft

Timothy James Peckham

Benjamin Britton

Jiantao Fan

Jonathan William Ward

Provided herein are imidazolium polymers having steric hindrance at the 4-position of the imidazole moieties in the polymeric chain. The sterically-protected, N-methylated imidazolium polymers exhibit hydroxide stability in concentrated caustic solutions at elevated temperatures, such as at 100&#xb0; C. and higher.

Stable poly(imidazolium) hydroxides

Described herein are crosslinked alkylated poly(benzimidazole) and poly(imidazole) polymer materials and devices (e.g., fuel cells, water electrolyzers) including these polymer materials. The polymer materials can be prepared in a convenient manner, allowing for applications such as anion exchange membranes (AEMs). The membranes provide high anion conductivities over a wider range of operating conditions when compared to the analogous membranes that are not cross-linked. The crosslinked polymer materials have improved alkaline stability, when compared to the analogous non-crosslinked polymer materials.

Crosslinking of hydroxide stable, polybenzimidazoliums and polyimidazoliums membranes and ionomers

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Burnaby, Canada

Thomas Weissbach