Description
The NEPEM Proton Exchange Membrane, engineered for vanadium flow battery systems, integrates specialized materials into a tape-casting fabrication process. This innovation enhances key performance metrics: mechanical strength to endure cyclic operational stresses, moisture retention for sustained ionic conductivity, and vanadium resistance to mitigate crossover-induced capacity decay. By addressing these critical challenges, the membrane ensures stable, long-lasting energy storage performance, making it a reliable choice for vanadium flow battery applications in grid-scale energy storage and renewable energy integration projects.
NEPEM Proton Exchange Membrane
| Membrane Type | Thickness (μm) | Weight (g/m²) |
|---|---|---|
| N-115 | 125 | 246 |
| N-117 | 175 | 345 |
| N-1110 | 220 | 432 |
| N-115W, N-116W, N-117W | 125, 150, 175 | 246, 295, 345 |
| Physical Properties | Index Parameters – N-11 Series | Index Parameters – N-11W Series |
|---|---|---|
| Tensile Test (23°C, 50% RH) | N-11 Series | N-11W Series |
| Tensile Strength (MPa) | ≥28 | ≥28 |
| Tensile Modulus (MPa) | ≥400 | ≥200 |
| Elongation at Break (%) | ≥120 | ≥200 |
| Specific Gravity | 1.97 | 1.98 |
| Other Properties | Index Parameters | |
| Conductivity (S/cm) | ≥0.100 | ≥0.100 |
| Acid Capacity (meq/g) | 1.00±0.05 | 1.00±0.05 |
| Dissolved Hydrogen Concentration (ppb, Max) | 1000 | |
| Hydrolytic Properties | Technical Indicators – N-11 Series | Technical Indicators – N-11W Series |
|---|---|---|
| Water Content (%) | 5.0±3.0 | 5.0±3.0 |
| Water Uptake (%) | 50.0±5.0 | 50.0±5.0 |
| Thickness Change (23℃, 50% RH) (% Increase) | ||
| – Water Soaked at 23℃ (50% RH, %) | ≤5 | ≤18 |
| – Water Soaked at 100℃ (50% RH, %) | ≤15 | ≤30 |
| Linear Expansion (23℃, 50% RH) (% Increase) | ||
| – Water Soaked at 23℃ (50% RH, %) | ≤5 | ≤16 |
| – Water Soaked at 100℃ (50% RH, %) | ≤18 | ≤20 |
Measurement Notes:
- Measurements were taken with the membrane conditioned at 23 °C and 50% relative humidity (RH).
- Conductivity measurements were performed at 23 °C and 100% relative humidity (RH).
- A base titration procedure is used to determine the equivalents of sulfonic acid groups in the polymer resin, which is then applied to calculate the acid capacity or equivalent weight of the membrane.
- Dissolved hydrogen concentration was measured using a hydrogen-rich water test pen (ENH-1000 Portable Dissolved Hydrogen Meter), based on the principle of oxidation-reduction potential (ORP) in the solution to calculate the dissolved hydrogen concentration.
- Water content of the membrane (dry weight basis) was determined with the membrane conditioned at 23 °C and 50% relative humidity (RH).
- Water uptake (dry weight basis) was measured by conditioning the dry membrane in water at 100 °C for 1 hour.
For further information about our products, please feel free to contact us via email at support@atomfair.com. We look forward to engaging with you.
