Proton Exchange Membrane, ePTFE-based, 10 μm (CAT#: STEM-BC-0130-ZJF)

The proton exchange membrane is a composite ePTFE membrane coated with perfluorosulfonic acid resin. It conducts protons while blocking gases and electrons, essential for fuel cell performance and durability. The ePTFE mid-layer provides structural support, while sulfonic acid layers absorb water and facilitate H3O+ transport via hopping between sulfonic sites. The membrane maintains high proton conductivity and consistent performance across batches. Thickness and density are controlled for uniform swelling, mechanical strength, and elastic modulus. Proton conductivity exceeds 110 mS/cm under 25°C water bath conditions. The ion exchange capacity is 1000-1200 g/mol.

Material: ePTFE core coated with perfluorosulfonic acid resin
Thickness: 10±1 μm
Density: 21±2 g/cm³
Swelling: ≤5% at 100°C 10 min
Tensile strength: ≥60-80 MPa
Elastic modulus: ≥400-600 MPa
Proton conductivity: ≥110 mS/cm
Ion exchange capacity: 1000-1200 g/mol

High proton conductivity
Gas and electron barrier
Maintains mechanical stability
Controlled swelling and dimensional stability
High reproducibility
Essential for fuel cells
Resistant to chemical variation
Water-mediated proton transport
Reliable batch consistency
Optimized for fuel cell core function

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STEM-BC-0065-ZJF
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