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Reviews
Nafion™ 211
Price:
From $22.00
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.
Please contact us at sales@fuelcellstore.com for the SDS and technical data sheets (TDS).
| 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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