Thermally Stable Hydrocarbon-based Anion Exchange Membrane and Ionomers

Researchers at RPI have developed a prototype hydrocarbon-based membrane for use in AE fuel cells and electrolyzers. This membrane can operate in a stable manner at elevated temperatures with the potential to provide enhanced operational performance. This membrane could possibly effectively participate in the growing fuel cell/electrolyzer market, as tested, the DPE membrane provides increased Tg values as compared to non-functionalized PS materials and increased Tg values as compared to main chain Nafion-117.

Anion exchange membranes and polymers for use in same

Alkaline exchange membranes (AEMs), also called anion exchange membranes, allow transportation of anions (ex: OH-, Cl-, Br-, etc.) from the cathode to the anode in electrochemical reaction. AEMs are the most critical component of AEM fuel cells, water electrolysis, and certain batteries, sensors, and actuators. Many AEM materials tend to degrade easily under high alkaline. This technology comprises new chemical structures composed of styrene-butadiene block copolymer functionalized with quaternized ammonium groups toovercomes this alkaline stability issue.


This technology relates to anion exchange membranes with enhanced stability to high pH environments including poly(arylene sulfone) or poly(arylene ketone) with anion exchange groups. Membranes according to this technology are simple to produce and have good mechanical properties, improved alkaline stability, as well as good anionic conductivity. This technology is particularly effective in fuel cell applications.