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Aquivion® membrane is used to separate the anode and cathode compartment of proton exchange membrane fuel cells (PEMFCs) and water electrolyzers, separators for electrochemical hydrogen pumps or redox flow batteries, and pervaporation or gas humidification systems. Various other electrochemical technologies can also benefit from Aquivion® membranes. Aquivion® E87-05S membrane has a nominal thickness of 50 micrometers (≈ 2 mil), which makes it suitable for unpressurized or low-pressure H2/Air PEMFCs, unpressurized or low-pressure H2/O2 PEMFCs, unpressurized water electrolyzers, unpressurized or low-pressure hydrogen pumps, atmospheric pressure redox flow batteries, atmospheric or low pressure pervaporation or gas humidification systems, etc. Direct methanol fuel cells (DMFCs), direct ethanol fuel cells (DEFCs), and various other alcohol based fuel cells can also benefit greatly from this cation exchange membrane.
Solvay Aquivion® E87-05S is a perfluorosulfonic acid (PFSA) ionomer membrane that exhibits an equivalent weight (EW) of 870 g/eq. Aquivion® PFSA ionomer membranes are melt-extruded products based on the unique Short Side Chain copolymer of Tetrafluoroethylene (TFE) and Sulfonyl Fluoride Vinyl Ether (SFVE) F2C=CF-O-CF2CF2-SO2F produced by Solvay. This membrane is available in the acid form (H+) and features a lower EW than most commercial proton exchange membranes or cation exchange membranes. The unique Short Side Chain copolymer allows higher crystallinity, improved mechanical properties, and better proton conductivity. Aquivion® E87-05S membrane is a non-reinforced membrane based on the chemically stabilized Solvay PFSA ionomer, which exhibit substantially lower fluoride ion release compared to the non-stabilized polymer – a sign of improved chemical durability. Chemical stabilization process is also known as end group conversion in which a large amount of polymer end groups are converted to their inert "CF3" configuration, and as such provides excellent lifetime. Aquivion® membranes are also manufactured in the standard form without the chemical stabilization. The polymer is chemically resistant and durable for various electrochemical and non-electrochemical applications.
• Very high concentration of functional groups for strong proton (or Na+, K+, Li+, etc.) conductivity
• High softening point for high temperature operation well above 80 ºC
• Strong water retention for better fuel cell operation at low-humidity conditions
Aquivion® PFSA’s shorter side chain makes it possible to achieve either better mechanical properties at the same IEC (ion-exchange capacity) or a higher ion exchange capacity (IEC) at the same mechanical properties than long side chain polymers (LSC). The side chain comparison of Short Side Chain (SSC) and Long Side Chain (LSC) PFSA membranes from a chemical composition is provided below.
Properties that are provided on the FuelCellStore website are directly taken from the technical documentation sheets provided by the manufacturer for consideration as "typical properties" and not to be construed as specifications.
A typical lead time of 3-4 weeks is to be expected.
|Thickness||50 micrometers (or 2 mils)|
|Density||1.93 g/cm3 (at 23 deg Celsius and 50% RH. Internal Method.)|
|Equivalent Weight (EW)||870 g/eq (Internal Method)|
|Water uptake (wt%)||35% (4 hours of soak in liquid H2O @ 100 deg Celsius. Internal Method.)|
|Total Acid Capacity (meq/g)||greater than 1.12 meq/g (Internal Method)|
|Weight Per Unit Area||97 g/m2|
|Tensile Modulus||240 MPa (Internal Method)|
|Tensile Stress (MD: Break)||40 MPa (ASTM D882)|
|Tensile Stress (TD: Break)||30 MPa (ASTM D882)|
|Elongation (MD: Break)||160% (ASTM D882)|
|Elongation (TD: Break)||200% (ASTM D882)|
|Conductivity (mS/cm)||greater than 228 mS/cm (Internal Method)|
|Elongation % in liquid H2O (MD)||less than 10% (Internal Method)|
|Elongation % in liquid H2O (TD)||less than 25% (Internal Method)|
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