Tecnología

AEM membranes: the other pillar of the electrolyser

The electrode is only half of the AEM equation. The anion exchange membrane is the other pillar, and its choice constrains which electrode can be used.

What defines a good AEM membrane

  • Ionic conductivity: > 80 mS/cm to minimise ohmic resistance.
  • Chemical stability: withstand 1 M KOH for thousands of hours at 60 °C.
  • Gas permeability: low, to avoid H₂/O₂ crossover.
  • Thickness: between 20 and 50 µm, balancing resistance and robustness.

Catalyst compatibility

The electrode ionomer must be chemically compatible with the membrane. A catalyst formulation optimised for one membrane may fail with another. We work with leading membrane manufacturers (Versogen, Ionomr Innovations, Dioxide Materials) to ensure validated pairings.

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