Nafion 211

Brand: Chemours
Product Code: 1600001

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Nafion® Membrane is used to separate the anode and cathode compartment of Proton Exchange Membrane fuel cells and water electrolyzers. The thickness of this particular cation exchange membrane, Nafion 211 makes it suitable for many Hydrogen Air/Oxygen Fuel Cell applications. Nafion 211 is 25.4 micrometers (1 mil) thick. The membrane is positioned between a backing film and a coversheet.

Chemours (formerly DuPont) Nafion® PFSA NR-211 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.

Nafion 211 and 212 Membrane Properties Sheet

Handling and Storage of Chemours Nafion Perfluorinated Membranes

Nafion Membrane Technical Bulletin No. 93-01 for "DRY" H+ Membrane Pretreatment

Membrane Properties
Thickness 25.4 micrometers (1 mil)
Basic Weight (g/m²) 50
Tensile Strength - max. (MPa) 23 (MD), 28 (TD) - Method: ASTM D 882
Non-Std Modulus (MPa) 288 (MD), 281 (TD) - Method: ASTM D 882
Elongation to Break (%) 252 (MD), 311 (TD) - Method: ASTM D 882
Hydrogen Crossover (ml/min·cm²) < 0.020
Specific Gravity (23 °C, 50% RH) 1.97
Available Acid Capacity (meq/g) 0.92 min
Total Acid Capacity (meq/g) 0.95 to 1.01
Conductivity (S/cm) 0.10 min
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 10 - Method: ASTM D 570
Linear Expansion % increase - 50% RH, 23°C to water soaked 100°C 15 - Method: ASTM D 570

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