CAS No: 2024597-25-7

Material Type: High-performance, non-fluorinated ion exchange polymer that combines environmental friendliness with excellent electrochemical performance.

Preparation: SPEEK is synthesized from Poly(Ether Ether Ketone) (PEEK) via a controllable sulfonation reaction on the polymer backbone.

Key Features：

    1. Adjustable Sulfonation Degree

        Available in multiple sulfonation levels such as 35%, 40%, 50%, and 60%.

      Lower sulfonation provides better mechanical and dimensional stability, while higher sulfonation gives higher ion-exchange capacity, allowing customers to select the most suitable material for their specific application requirements.

    2. Excellent Ion Exchange Capacity

      Uniformly distributed sulfonic acid groups along the polymer chain enable rapid ion transport and efficient ion exchange, ensuring high ion conductivity in electrochemical systems.

    3. Outstanding Chemical Corrosion Resistance

        Exhibits good chemical stability in acidic aqueous and electrochemical environments.

Main Application Fields:

• Ion Exchange Membrane: Used as an ion-conducting membrane material in redox flow batteries (all vanadium, zinc-based, organic), proton exchange membrane fuel cells (PEMFCs), direct methanol fuel cells (DMFCs), and as the cation-exchange layer in bipolar membranes (BPMs);
• Water Treatment Membrane Materials: Its high ion selectivity makes SPEEK suitable for use as a membrane material in water treatment processes such as electrodialysis (desalination and material separation) and nanofiltration (small-molecule retention);
• Electrochemical Reactors: Used as a proton-conducting medium to facilitate proton transport within the reactor and support efficient electrochemical reaction performance;
• Chemical Sensors: Used to modify sensor sensitive layers, enhancing response sensitivity and detection accuracy for target ions or analytes;
• Composite Electrolytes: Can be combined with inorganic nanofillers (such as silica, zirconia) or polymer matrices to form composite proton-conducting electrolytes with enhanced mechanical and transport properties.

Key Technical Parameters:

• Appearance: White to light brown noodle-like solid under normal conditions; the color of products with different sulfonation degrees varies slightly;
• Solubility: Soluble in common polar organic solvents such as NMP (N-methylpyrrolidone), DMSO (dimethyl sulfoxide), DMAc (dimethylacetamide), and DMF (dimethylformamide);
• Storage Conditions: Seal and store in a cool, dry place away from moisture and light to minimize changes in material performance.