Anion-Exchange Membrane (NEXIONIC, NA20-80) for Alkaline Electrolyzer and Fuel Cell, CAEFCAEMNA
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The NEXIONIC NA series of anion exchange membranes (AEMs) represents a transition in the industry toward high-stability, hydrocarbon-based materials. While "NA" often specifically refers to the commercial dispersion (liquid) form used for catalyst inks, the series also includes a range of solid membranes designed for durability in alkaline environments.
The "NA" series membranes are built on the Quaternary Ammonium Poly(phenylene terphenyl) or QAPPT chemical platform. (1) Ether-Free Backbone: Unlike older AEMs that fail because hydroxide ions (OH-) attack the ether bonds in the polymer chain, the NA series uses an all-carbon aromatic backbone. (2) Steric Protection: The positively charged ammonium groups are "shielded" by the bulky aromatic rings, preventing chemical degradation at high pH. (3) High Conductivity: These materials are optimized for high Ion Exchange Capacity (IEC), allowing for fast ion movement even at lower relative humidity.
The main application of these NA membranes are: (1) AEM Water Electrolysis (AEMWE): Producing green hydrogen using non-precious catalysts (like Nickel or Cobalt). (2) AEM Fuel Cells (AEMFC): Generating power from hydrogen in an alkaline environment, allowing the use of cheaper catalysts than the Platinum required by Nafion. (3) Electrochemical CO2 Reduction: Converting CO2 into valuable chemicals like syngas or ethylene.
| Part Number | CAEFCAEMNA20 | CAEFCAEMNA50 | CAEFCAEMNA80 |
| Name | NA20 | NA50 | NA80 |
| Thickness (um) | 20 | 50 | 80 |
| Reinforcement | None (Self-supporting) | None (Self-supporting) | None (Self-supporting) |
| Backbone | Poly(phenylene) | Poly(phenylene) | Poly(phenylene) |
| Ion Type | Quaternary Ammonium (–NR₄⁺) | Quaternary Ammonium (–NR₄⁺) | Quaternary Ammonium (–NR₄⁺) |
| Ion Exchange Capacity (IEC) | ~2.5 – 2.8 meq/g | ~2.5 – 2.8 meq/g | ~2.5 – 2.8 meq/g |
| Typical Use Case | AEM Fuel Cells (AEMFC) | AEM Water Electrolysis (AEMWE) | Industrial CO2 Electrolysis |
| Package Grade | 10cm * 10cm/pcs/pack | 10cm * 10cm/pcs/pack | 10cm * 10cm/pcs/pack |
Use Note:
These NA series anion exchange membranes are typically shipped in a stable Bicarbonate (HCO3^-) or Chloride (Cl-) form to ensure long shelf life. They must be "activated" to their conductive state:
(1) Hydration: Soak in deionized (DI) water for at least 1 hour.
(2) Conversion: Soak in 1.0 M KOH for 12–24 hours to exchange the ions for Hydroxide (OH-).
(3) Rinsing: Rinse with DI water until the effluent pH is neutral.
Note: Once converted to OH- form, the membrane should be kept away from air as much as possible, as it will naturally absorb CO2 and convert back to the less conductive carbonate form.