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

Nafion™ Membrane Safety Handling Technical Information Bulletin T-01

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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