FS-990-PK - Electrolyser Membrane

FUMATECH BWT GmbH

Suitable for electrochemical processes like water electrolysis and redox-flow batteries
Delivered dry (non-activated)
Optionally pre-treated with 10 wt% H₂SO₄ at 70–100 °C
Can also be activated in-situ (for water electrolysis)

The FS-990-PK is a fluorinated cation-exchange membrane with PK reinforcement, featuring a thickness of 90 μm. It is designed for electrochemical processes that require high oxidative stability, such as water electrolysis and redox-flow batteries. This membrane offers low resistance, high mechanical stability, high selectivity, and excellent chemical and oxidative stability. It is delivered in a dry, non-activated form and can be pre-treated with a 10 wt% H₂SO₄ solution at 70–100 °C for at least 6 hours to achieve optimal performance. The membrane is trans-illuminant, with a yellow to beige color, and is delivered on a colorless rigid PET foil. It is important to handle the membrane with care to avoid punctures, creases, or scratches, as these can lead to leaks. The membranes performance is further enhanced by its high ion exchange capacity, low area resistance, and high conductivity in 0.5 M H₂SO₄. It is a reliable choice for applications requiring high efficiency and durability in electrochemical systems.

Use Cases

Water Electrolysis
Redox-Flow Batteries

Capabilities

High oxidative, chemical, and mechanical stability
Low area resistance (<0.25 Ω·cm² in 0.5 M H₂SO₄)
High proton conductivity (>60 mS/cm in 0.5 M H₂SO₄)
Reinforced with PK for enhanced durability
Delivered dry, can be pre-treated or activated in-situ
Trans-illuminant, yellow to beige membrane on PET backing

FUMATECH BWT GmbH FUMATECH BWT GmbH, a subsidiary of the BWT Group headquartered in Bietigheim-Bissingen, Baden-Württemberg, Germany, specializes in innovative ion-exchange membrane technology serving two key electrochemical application fields: water treatment and energy-related applications including PEM fuel cells, water electrolysis, and redox-flow batteries. Drawing on over 25 years of experience in membrane manufacturing and membrane process technology—from synthesis of raw and auxiliary materials through membrane processing to technical application—FUMATECH has earned particularly high international reputation as a supplier of innovative membranes, the heart of the PEM fuel cell. The company's polymer electrolyte membranes for electrolysis and fuel cell applications, based on PFSA polymer and typically produced in reinforced versions, along with its FAA3 quaternary ammonium-based anion exchange membranes, support water electrolysis and photo-electrolysis research including studies on water-splitting hydrogen and oxygen evolution reactions. FUMATECH's parent company BWT provides complementary water treatment systems specifically designed for hydrogen production, delivering the pure water required for electrolysis processes with the highest hygiene safety and quality standards, positioning the combined FUMATECH-BWT offering as a comprehensive membrane and water treatment solution provider across the growing green hydrogen production and fuel cell technology market.

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