Main Types of Fuel Cell Ion Exchange Membranes

• Cation Exchange Membrane (CEM)

• Anion Exchange Membrane (AEM)

• Bipolar Membranes

• Chlor-alkali Production Membranes

Whats is the Difference Between Cation and Anion Exchange Membranes?

Cation Exchange Membranes (CEM) are usually comprised of a fluorinated polymer with sulfonic acid sites and have excellent ionic conductivity and thermal/chemical durability. Currently manufactured Anion Exchange Membranes (AEMs) can utilize various alkaline stable polymeric materials as the host material and come with various functional sites that conducts OH- or any other anionic species.  Thermal/chemical durability of AEMs are in general lower compared to its CEM counterparts.