Generic Sulfonated Polyether Ether Ketone (SPEEK) Membrane (SPEEK-2560a_Thickness 25μm, 20×20cm)

The SPEEK (Sulfonated Polyether Ether Ketone) membrane is a high-performance, non-fluorinated ion-exchange membrane, prepared by sulfonating the PEEK main chain. It is specifically developed for flow batteries. Its unique molecular structure, consisting of ether bonds, ketone groups, and benzene rings, provides superior anti-swelling performance and stability in flow battery electrolyte environments.

• Low swelling: Ensures dimensional stability during long-term operation.
• High mechanical strength: Tensile strength 24–28 MPa, ensuring durability.
• Chemical stability: Stable in acidic or oxidizing electrolyte environments.
• Tunable ion selectivity: Proton conductivity and selectivity controlled via sulfonation degree.
• Customizable specifications: Thickness 15–200 μm (standard 25 μm or 50 μm), cut-to-size available.