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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

The NEPEM Proton Exchange Membrane (PEM) for Hydrogen Fuel Cells integrates expanded polytetrafluoroethylene (ePTFE) microporous reinforcement, delivering high mechanical strength, high proton conductivity, and low ion permeability.

NEPEM Proton Exchange Membrane

For Hydrogen Fuel Cell Applications

Thickness and Basis Weight Properties
Membrane Type Thickness (microns, ฮผm) Weight (g/mยฒ)
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 (23ยฐC, 50% RH) – Tensile Strength (MPa) โ‰ฅ42 โ‰ฅ42 โ‰ฅ40 โ‰ฅ40 โ‰ฅ28/28
Tensile Test (23ยฐC, 50% RH) – Tensile Modulus (MPa) โ‰ฅ400 โ‰ฅ400 โ‰ฅ350 โ‰ฅ350 โ‰ฅ400/400
Tensile Test (23ยฐC, 50% RH) – Elongation at Break (%) โ‰ฅ150 โ‰ฅ150 โ‰ฅ180 โ‰ฅ180 โ‰ฅ100/120
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) โ‰ฅ0.100 โ‰ฅ0.110 โ‰ฅ0.100
Hydrogen Crossover3 [cmยณยทcm/(cmยฒยทsยท0.1MPa)] <5.00ร—10โปโธ <4.50ร—10โปโธ /
Hydrogen Crossover Current Density4 (mA/cmยฒ) <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 (%) 10.0ยฑ3.0 10.0ยฑ3.0 10.0ยฑ3.0 10.0ยฑ3.0 5.0ยฑ3.0
Water Uptake6 (%) 50.0ยฑ5.0 50.0ยฑ5.0 50.0ยฑ5.0 50.0ยฑ5.0 50.0ยฑ5.0
Thickness Swelling Rate (23ยฐC, 50% RH), % increase
Water soaked at 23ยฐC, 50% RH (%) โ‰ค10 โ‰ค15 โ‰ค10 โ‰ค15 /
Water soaked at 100ยฐC, 50% RH (%) โ‰ค30 โ‰ค40 โ‰ค30 โ‰ค40 /
Linear Expansion (23ยฐC, 50% RH), % increase
Water soaked at 23ยฐC, 50% RH (%) โ‰ค3 โ‰ค4 โ‰ค4 โ‰ค5 โ‰ค4
Water soaked at 100ยฐC, 50% RH (%) โ‰ค5 โ‰ค5 โ‰ค7 โ‰ค7 โ‰ค20

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