E-620(K) Cation-Exchange Membrane for Organic Redox Flow Battery (ORFB) and Capacitive Deionization (CDI), CORFBCDICEME620K
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The Fumasep E-620 is an electrochemical-grade Cation Exchange Membrane (CEM). Unlike the PFSA membranes (like Nafion or FS-930) that are often "over-engineered" for extreme fuel cell conditions, the E-620 is a high-selectivity, ultra-low resistance membrane designed for high-efficiency water treatment and specialized energy storage.
The primary application for E-620(K) membrane is Capacitive Deionization (CDI) for electrochemical separation. the E-620 acts as the cation-selective layer that allows salt cations (like Na+ or Ca2+) to be adsorbed into the electrodes while preventing co-ion leakage.
In organic redox flow battery application, its high selectivity (> 96%) helps prevent the crossover of active species in near-neutral or moderately acidic/alkaline electrolyte.
| Part Number |
CORFBCDICEME620K (C-ORFBCDI-CEM-E620K) |
| Appearance |
Transparent (light brown) |
| Backing Foil |
Single-side PET (need peeling off), no reinforcement layer The membrane with microporous PE enforcement is available upon request. |
| Counter Ion |
K form |
| Additive |
PEG |
| Dimension |
T 20um * W 100mm * L 100mm (Other membrane sizes can be supplied upon request) |
| Weight per Unit Area (dry) |
26-35 g m-2 |
| Area Resistance in Na+ form |
<1.0 Ω cm2 |
| Selectivity 0.1/0.5 mol/kg KCl at T = 25 °C |
> 96% |
| Young’s modulus at 23 °C / 50 % r.h. |
> 600 MPa |
| Tensile Strength at 23 °C / 50 % r.h. |
> 30 MPa |
| Dimensional Swelling in H2O at T = 25 °C |
<3% |
| Stability Range |
Stability range: pH = 0 – 14 at T = 15 – 40 °C |