Flow Battery Proton Exchange Membrane

Product Overview

The flow battery proton exchange membrane is a high-performance perfluorosulfonic acid (PFSA) membrane with cation-selective transport properties. Featuring thin thickness, high mechanical strength, low swelling, and dimensional stability, it offers excellent durability. The membrane is suitable for vanadium redox flow batteries, iron-chromium flow batteries, and other flow battery systems, providing an efficient and stable proton conduction pathway for electrochemical energy storage.

Working Principle

The membrane forms proton-conducting channels through its perfluorosulfonic acid groups, enabling unidirectional cation transport while preventing cross-contamination of active species. Its low swelling and high mechanical strength ensure dimensional and structural stability under electrolyte immersion and cycling operation, supporting high-efficiency operation and long service life of flow batteries.

Key Features

• Excellent Mechanical Strength:Tensile strength ≥28 MPa, elongation at break ≥120%, maintaining stability under harsh conditions.
• High Proton Conductivity:Conductivity ≥0.100 S/cm, enhancing ion exchange efficiency.
• Low Swelling:Thickness swelling ≤5% at 23 °C and 50% RH, ensuring dimensional stability.
• High Durability and Vanadium Resistance:Acid and alkali resistant, anti-permeation, extending membrane lifetime.
• Multiple Thickness Options:Available in various thicknesses to meet diverse application requirements.

Applications

• Vanadium Redox Flow Batteries:Provides efficient proton conduction and long-term stable operation.
• Iron-Chromium Flow Batteries:Ensures system stability and extended service life.
• Other Flow Battery Systems:Suitable for applications requiring high conductivity and durability.