Chemically stabilised extruded and recast short side chain Aquivion ® proton exchange membranes for high current density operation in water electrolysis
Membrane-electrode assemblies based on chemically stabilised short-side-chain proton exchange Aquivion ® membranes, prepared by extrusion or recast methods, have been investigated for operation at high current density (3–4 A cm −2 ) in water electrolysis cells. A thickness of 90 μm was selected for these perfluorosulfonic acid membranes in order to provide proper resilience to hydrogen crossover under differential pressure operation while allowing operation at high currents.