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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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Description






NEPEM Proton Exchange Membrane Properties

NEPEM Proton Exchange Membrane

For Hydrogen Fuel Cell Applications

Thickness and Basis Weight Properties
Membrane Type Thickness (microns, μm) Weight (g/m²)
N-3010 12 23.6
N-3015 15 29.5
N-211 25 50.0
N-212 50 99.0


Mechanical Properties
Physical Property N-3010 (MD) N-3010 (TD) N-3015 (MD) N-3015 (TD) N-211/212
Tensile Test (23°C, 50% RH) - Tensile Strength (MPa) ≥42 ≥42 ≥40 ≥40 ≥28/28
Tensile Test (23°C, 50% RH) - Tensile Modulus (MPa) ≥400 ≥400 ≥350 ≥350 ≥400/400
Tensile Test (23°C, 50% RH) - Elongation at Break (%) ≥150 ≥150 ≥180 ≥180 ≥100/120
Specific Gravity 1.97 1.97 1.97 1.97 1.97


Other Properties
Other Properties N-3010 N-3015 N-211/212
Conductivity2 (S/cm) ≥0.100 ≥0.110 ≥0.100
Hydrogen Crossover3 [cm³·cm/(cm²·s·0.1MPa)] <5.00×10⁻⁸ <4.50×10⁻⁸ /
Hydrogen Crossover Current Density4 (mA/cm²) <2.0 <2.0 /


Swelling Properties
Swelling Properties N-3010 (MD) N-3010 (TD) N-3015 (MD) N-3015 (TD) N-211/212
Water Content5 (%) 10.0±3.0 10.0±3.0 10.0±3.0 10.0±3.0 5.0±3.0
Water Uptake6 (%) 50.0±5.0 50.0±5.0 50.0±5.0 50.0±5.0 50.0±5.0
Thickness Swelling Rate (23°C, 50% RH), % increase
Water soaked at 23°C, 50% RH (%) ≤10 ≤15 ≤10 ≤15 /
Water soaked at 100°C, 50% RH (%) ≤30 ≤40 ≤30 ≤40 /
Linear Expansion (23°C, 50% RH), % increase
Water soaked at 23°C, 50% RH (%) ≤3 ≤4 ≤4 ≤5 ≤4
Water soaked at 100°C, 50% RH (%) ≤5 ≤5 ≤7 ≤7 ≤20

Measurement Notes:
  1. 1 Measurements were performed on membranes conditioned at 23 °C and 50% relative humidity (RH).
  2. 2 Conductivity was measured at 23 °C and 100% RH.
  3. 3 Hydrogen crossover was determined at 23 °C and 100% RH.
  4. 4 Hydrogen crossover current was measured in a membrane electrode assembly (MEA) with H₂ as the feed gas, at 80 °C under fully humidified conditions.
  5. 5 Water content of the membrane was quantified after conditioning at 23 °C and 50% RH (reported on a dry weight basis).
  6. 6 Water uptake was assessed by exposing dry membranes to water at 100 °C for 1 hour, with results reported on a dry weight basis.
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