Aquivion® E98-05

Brand: Solvay Specialty Polymers USA
Product Code: 72700003

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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 pump or redox flow batteries, and pervaporation or gas humidification systems. Various other electrochemical technologies can also benefit from Aquivion® membranes. Aquivion® E98-05 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® E98-05 is a perfluorosulfonic acid (PFSA) ionomer membrane that exhibits an equivalent weight (EW) of 980 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® E98-05 membrane is a non-reinforced membrane based on the standard Solvay PFSA ionomer (not chemically stabilized).  PFSA membranes without chemical stabilization will have slightly higher degradation rates compared to chemically stabilized PFSA membranes.  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.  PFSA membranes with chemical stabilization would exhibit substantially lower fluoride ion release compared to the non-stabilized polymer – a sign of improved chemical durability.  The polymer is chemically resistant and durable for various electrochemical and non-electrochemical applications.

Key Advantages:

• 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

Comparison of Short Side Chain and Long Side Chain PFSA Membranes:

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 IEC at the same mechanical properties than long side chain polymers (LSC).  The side chain comparison of  Short Side Chain and Long Side Chain PFSA membranes from a chemical composition perspective is provided below.


 Aquivion® E98-05 Technical Data Sheet

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.

Membrane Properties
Thickness 50 micrometers (or 2 mils)
Density 1.93 g/cm3 (at 23 deg Celsius and 50% RH. Internal Method.)
Equivalent Weight (EW) 980 g/eq (Internal Method)
Water uptake (wt%) 25% (4 hours of soak in liquid H2O @ 100 deg Celsius. Internal Method.)
Total Acid Capacity (meq/g) greater than 1.00 meq/g (Internal Method)
Weight Per Unit Area 97 g/m2
Tensile Modulus 270 MPa (Internal Method)
Tensile Stress (MD: Break) 40 MPa (ASTM D882)
Tensile Stress (TD: Break) 30 MPa (ASTM D882)
Elongation (MD: Break) 150% (ASTM D882)
Elongation (TD: Break) 200% (ASTM D882)
Conductivity (mS/cm) greater than 160 mS/cm (Internal Method)
Elongation % in liquid H2O (MD) less than 5% (Internal Method)
Elongation % in liquid H2O (TD) less than 20% (Internal Method)

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