Date of achievement:
31 March 2021 (M15).
Hydrocarbon poly(arylene) based anion exchange ionomer showed high ionic conductivity, above 50 mS/cm reaching the target, and good thermal stability-above 246 °C.
Composite membranes using anion exchange ionomer and PBI /sPSU/sPPEK fibers showed enhanced plastic behaviour compared to the non-reinforced ionomer membrane. Crossover tests using stand-alone Hydrolite and modified Fumatech type membranes in the temperature range of 30-110 °C showed less than 0.2% of crossover.
Composite membranes with thicknesses of 38-49 microns showed OH- conductivity values at 50 °C of 90-105 mS/cm.
Best series resistance measured in single cell for the second version of the Hydrolite membrane (25 µm thick) has shown values of 0.06 Ohm cm2 at 50 °C.