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Membranes

Various anion and cation membranes for flow batteries, electrolysis, and CO2 electrolysis.

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Ion exchange membranes are the heart of modern electrochemical systems — governing ion transport, selectivity, and efficiency in applications from green hydrogen production to energy storage. We stock a curated range of high-quality ion exchange membranes from Fumatech, covering both cation and anion exchange chemistries to suit a broad spectrum of research and engineering needs.

Cation exchange membranes (CEM) selectively transport positive ions (H⁺, Na⁺, K⁺) while blocking anions, making them the standard choice for proton exchange membrane (PEM) water electrolysis, fuel cells, and vanadium redox flow batteries. Our range includes reinforced and non-reinforced options across a range of thicknesses, with PTFE-reinforced variants offering exceptional mechanical durability for demanding operating conditions.

Anion exchange membranes (AEM) selectively transport negative ions (OH⁻, Cl⁻, HCO₃⁻) and are the enabling technology for alkaline water electrolysis, AEM fuel cells, and chlor-alkali processes. The fumasep FAA-3 series spans non-reinforced thin-film membranes for low-resistance research applications through to heavy-duty PK-reinforced formats for pilot and scale-up systems.

All membranes in our range are sourced directly from the manufacturer, supplied with full technical datasheets, and available in standard sheet sizes or custom formats. Whether you are building a first prototype or scaling up to a full electrochemical stack, we can help you select the right membrane for your chemistry, cell architecture, and performance targets.

Not sure where to start? Contact us and we’ll guide you to the right choice.