Product Overview
High-purity graphite bipolar plates are core components in proton exchange membrane (PEM) fuel cells and redox flow batteries. With excellent electrical conductivity, corrosion resistance, and gas impermeability, graphite bipolar plates provide efficient current collection and gas distribution in fuel cell stacks, enabling clean and reliable hydrogen power generation.
Key Features
- Excellent electrical conductivity
- Corrosion resistant in fuel cell environment
- Gas impermeable for reliable sealing
- Precision flow field channels
- Good thermal conductivity for temperature management
- Lightweight compared to metal plates
- Custom flow field designs available
Technical Specifications
| Parameter | Unit | Value |
|---|---|---|
| Material | - | High Purity Graphite / Composite |
| Density | g/cm³ | 1.80 - 1.90 |
| Electrical Conductivity (In-plane) | S/cm | 100 - 200 |
| Flexural Strength | MPa | 40 - 60 |
| Gas Permeability | - | Impermeable |
| Thickness Range | mm | 1 - 5 |
| Max Plate Size | mm | 400x400 |
| Operating Temperature | °C | -40 to 200 |
Applications
- PEM hydrogen fuel cell stacks
- Vanadium redox flow batteries
- Fuel cell electric vehicles
- Stationary fuel cell power systems
- Backup power systems
- Portable fuel cell applications
- UAV and drone fuel cells
Why Choose Jincheng Fuel Cell Plates?
We manufacture precision graphite bipolar plates for fuel cell and battery manufacturers. Our plates are precision machined with custom flow field designs optimized for your specific fuel cell architecture. We offer both pure graphite plates and composite graphite plates, with various sizes and thicknesses to meet your stack design requirements.
FAQ
Q: What flow field designs can you produce?
A: We can machine various flow field designs including serpentine, parallel, interdigitated, and pin-type flow fields. Please provide your flow field design drawings or specifications, and we will produce precision-machined bipolar plates to your exact requirements.
Q: What is the difference between pure graphite and composite bipolar plates?
A: Pure graphite plates offer excellent electrical conductivity and corrosion resistance but are relatively brittle. Composite graphite plates (graphite filled polymer) are more flexible and impact resistant, making them suitable for high-volume automotive applications, but with slightly lower conductivity. The choice depends on your specific performance and cost requirements.
Q: Can you produce coated bipolar plates?
A: Yes, we can provide graphite bipolar plates with various coatings to enhance corrosion resistance and contact conductivity. Common coatings include gold, titanium nitride, and doped diamond-like carbon (DLC). Please specify your coating requirements when ordering.
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