Carbon Fiber Reinforced Carbon-Polymer Bipolar Plate

Many conventional carbon-polymer bipolar plates suffer from insufficient toughness, making them prone to crack during stacking and module assembly for redox flow-battery stacks. To address this practical limitation, our composite substrate incorporates distributed carbon-fiber fillers as a toughening backbone within the carbon-polymer matrix.

The composite material survives complete 360-degree flexing without fracture. It delivers robust mechanical performance: compressive strength reaches minimum 200 MPa alongside flexural strength maintained at 50 MPa or higher. Under 0.2 MPa pressure differential, hydrogen permeation stays below 5×10⁻⁶ cm³/cm²·min, effectively restricting gas cross-leakage inside assembled cell stacks. The material achieves over 30 S/cm in-plane electrical conductivity to guarantee stable current transmission within electrochemical assemblies.

This toughened carbon-polymer composite works reliably within vanadium redox flow batteries, zinc-bromine energy-storage systems and further types of redox flow battery hardware. We support custom adjustments for plate thickness, width and length to match customers' unique stack layouts. Every production batch undergoes standardized mechanical, gas-barrier and conductivity testing before shipment to secure consistent field-operation performance.

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