E-620(K) Cation Exchange Membrane

The E-620(K) is an ultra-thin cation exchange membrane engineered for organic redox flow battery development, where minimizing ohmic loss without sacrificing chemical stability is critical. At only 17-23 µm, it combines a sub-1 Ω cm² area resistance with full pH stability across the entire 0-14 range, giving researchers latitude to test aggressive electrolyte chemistries without membrane degradation. Supplied dry in K+ form with a PEG stabilizer, it is ready to hydrate and install directly into single-cell or stack hardware.

• Ultra-Low Resistance: Sub-1.0 Ω cm² area resistance keeps ohmic losses to a minimum in high-current-density ORFB testing.
• High Selectivity: >96% ion selectivity limits crossover and self-discharge during extended cycling studies.
• Full pH Compatibility: Stable across the complete pH 0-14 range, suiting a broad span of aqueous and organic electrolyte chemistries.
• Dimensionally Stable: <3% swelling in water minimizes assembly stress and preserves gasket sealing over repeated wet/dry cycles.
• Ready-to-Cut Formats: Supplied as standard sheets or pre-cut for Redox Flow’s single-cell hardware, X-Stack, S-Stack, and 3-compartment X-Cell configurations.