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NEPEM Proton exchange membrane for hydrogen fuel cell

By incorporating expanded polytetrafluoroethylene (ePTFE) microporous reinforcing material into conventional proton exchange membranes (PEMs), Thinkre PEM exhibits the characteristics of high mechanical strength, high proton conductivity, and low ion permeability.

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NEPEM Proton Exchange Membrane for Vanadium Flow Battery


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

For Vanadium Flow Battery Applications

Thickness and Basis Weight Properties
Membrane Type Thickness (microns, ฮผm) Basis Weight (g/mยฒ)
N-212 50 99
N-1125 62 122
N-113 75 148
N-1135 80 172
N-114 100 197
N-115 125 246

Physical and Other Properties
Physical Properties Index Parameters
Tensile Strength (MPa) โ‰ฅ30
Elastic Modulus (MPa) โ‰ฅ400
Elongation at Break (%) โ‰ฅ120
Specific Gravity 1.97
Other Properties Index Parameters
In-plane Conductivity (S/cm) โ‰ฅ0.100
Normal Conductivity (S/cm) โ‰ฅ0.04
Acid Capacity (meq/g) 1.00ยฑ0.05

Swelling Properties
Swelling Properties Index Parameters
Water Content (%) 5.0ยฑ3.0
Water Uptake (%) 50.0ยฑ5.0
Thickness Swelling Rate (23โ„ƒ, 50% RH), % increase
Water soaked at 23โ„ƒ, 50% RH (%) โ‰ค5
Water soaked at 100โ„ƒ, 50% RH (%) โ‰ค15
Linear Expansion (23โ„ƒ, 50% RH), % increase
Water soaked at 23โ„ƒ, 50% RH (%) โ‰ค5
Water soaked at 100โ„ƒ, 50% RH (%) โ‰ค18

Measurement Notes for NEPEM Proton Exchange Membrane for Vanadium Flow Battery
  1. Conductivity measurements were conducted at 23ยฐC and 100% relative humidity (RH).
  2. A base titration procedure was used to determine the equivalents of sulfonic acid in the polymer, and this measurement was applied to calculate the acid capacity or equivalent weight of the membrane.
  3. Water content of the membrane conditioned at 23ยฐC and 50% relative humidity (RH) (reported on a dry weight basis).
  4. Water uptake was measured by conditioning dry membranes in water at 100ยฐC for 1 hour (reported on a dry weight basis).
  5. Tensile test was performed at 23ยฐC and 50% relative humidity (RH).
  6. Normal conductivity was measured at 25ยฐC in a 3 M Hโ‚‚SOโ‚„ solution.
  7. Measurements were taken with the membrane conditioned at 23ยฐC and 50% relative humidity (RH) (applicable to thickness, basis weight, and swelling property tests unless specified otherwise).

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