Composite Flexible Graphite Bipolar Plate – Weldable, Carbon Fiber Reinforced

High strength with carbon fiber reinforcement.
Weldable edge design for easy assembly.
Low resistance and high conductivity for VRFB.

Composite flexible graphite bipolar plates stacked together.

Description

Composite flexible graphite bipolar plates are developed to overcome the limitations of conventional flow battery plate materials such as conductive PP/PE, flexible graphite, and isostatic graphite. Reinforced with a carbon fiber skeleton, this material offers high mechanical strength, excellent electrical conductivity, low density, and thin thickness. It also supports integrated molding with flow channels and weldable edges, enabling improved assembly efficiency and structural reliability.

In practical applications, composite flexible graphite bipolar plates are often used together with soft graphite battery felt in vanadium redox flow batteries (VRFB), where they work synergistically to enhance electrical conductivity, electrochemical performance, and overall system efficiency. These features make the product highly suitable for various flow battery systems and demanding energy storage applications.

Features

Carbon fiber reinforced structure. High strength and crack resistance.
High electrical conductivity / low resistance. Improved battery efficiency.
Lightweight and thin design. Lower density for higher energy performance.
Weldable edge design. Easier assembly and better sealing.
Integrated flow channel molding. One-piece structural design.
Compatible with soft graphite felt. Optimized for VRFB systems.

Specifications

Table 1: Composite Flexible Graphite Bipolar Plate Specifications
Thickness	Compressive Strength	Tensile Strength	Square Resistance	Specific Conductance	Work Temperature	Density	Hydrogen Permeability
0.6–0.8 mm (typical: 0.8 mm)	≥ 100 Mpa	≥ 50 Mpa	20–40 mΩ	300–550 S/cm	−30 to + 180 °C	1.4–1.6 g/cm³	≤ 5 × 10^-6 cm³/(cm²·min) @ 0.15 MPa