FAP-450 Anion Exchange Membrane

The FAP-450 is a partially fluorinated anion exchange membrane purpose-built for vanadium redox flow battery development, where oxidative stability under strongly acidic conditions determines cycle life. At 44-56 µm it delivers high oxidative stability without sacrificing conductivity, holding area resistance below 0.7 Ω cm² in 0.5 M H2SO4 while resisting vanadium-side degradation. Supplied dry and pretreatment-free on a PET backing, it drops directly into VRFB test hardware for rapid electrolyte screening and membrane benchmarking work.

• Oxidation-Resistant Chemistry: Partially fluorinated backbone withstands the strongly acidic, oxidizing conditions typical of VRFB positive-side electrolytes.
• Low Area Resistance: <0.7 Ω cm² in 0.5 M H2SO4 keeps voltage efficiency high across charge/discharge cycling.
• Low Vanadium Uptake: <10 wt% uptake limits capacity fade from vanadium crossover during extended cycling studies.
• Mechanically Robust: >70 MPa tensile strength and >250% elongation at break simplify handling and assembly.
• No Pretreatment Required: Ships dry and ready to install, cutting setup time before cell assembly.
• Multiple Cut Formats: Available as standard sheet stock or pre-cut for Redox Flow’s single-cell, X-Stack, S-Stack, and 3-compartment hardware.