Nafion™ XL

Brand: Chemours
Product Code: 1600002

From $34.00

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Please note that Nafion™ XL has been discontinued by Chemours and only limited supplies are available for the time being.

Nafion™ XL membranes are newly developed reinforced membranes that enhance the chemical stability of Nafion™ membranes. The mechanical durability and enhanced chemical stability of the Nafion™ XL membrane are the result of an advanced stabilization system that increases mechanical strength and provides resistance to peroxide attack, resulting in improved membrane life and performance. Nafion™ XL is 27.5 micrometers (1.1 mil) thick. The cation exchange membrane is positioned between a backing film and a coversheet.

Chemours (formerly DuPont) Nafion™ XL membranes are based on chemically stabilized perfluorosulfonic acid/PTFE copolymer in the acid (H+) form, and exhibit substantially lower fluoride ion release compared to the non-stabilized polymer – a sign of improved chemical durability. Nafion™ PFSA membranes are widely used for Proton Exchange Membrane (PEM) fuel cells and water electrolyzers. The membrane performs as a separator and solid electrolyte in a variety of electrochemical cells that require the membrane to selectively transport cations across the cell junction. The polymer is chemically resistant and durable.

Please contact us at for the SDS and technical data sheets (TDS).

Membrane Properties
Thickness 27.5 micrometers (1.1 mil)
Basic Weight (g/m²) 55
Tensile Strength - max. (MPa) 45 (MD), 40 (TD) - Method: ASTM D 882
Non-Std Modulus (MPa) 613 (MD), 400 (TD) - Method: ASTM D 882
Elongation to Break (%) 200 (MD),185 (TD) - Method: ASTM D 882
Hydrogen Crossover (ml/min·cm²) < 0.015
In-Plane Conductivity (mS/cm) > 72.0
Through-Plane Conductivity (mS/cm) > 50.5
Membrane Hydrolytic Properties
Water content (% water) 5.0 ± 3.0% - Method: ASTM D 570
Water uptake (% water) 50.0 ± 5.0% - Method: ASTM D 570
Linear Expansion % increase - 50% RH, 23°C to water soaked 23°C 1% (MD), 5% (TD)
Linear Expansion % increase - 50% RH, 23°C to water soaked 100°C 3% (MD), 11% (TD)

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