Description
Overview
SIGRACET® 22 BB and 39 BB are high-porosity carbon paper gas diffusion layers (GDLs) designed for PEM fuel cells and related electrochemical applications. Built with a carbon fiber paper backing and a microporous layer (MPL), they support gas transport, water management, heat dissipation and electrical conductivity within the membrane electrode assembly. Belonging to the same SIGRACET® high-porosity platform, 22 BB has a typical thickness of 215 µm and 39 BB has a typical thickness of 315 µm. Both grades are suitable for fuel cell stack development, component integration, laboratory evaluation and industrial hydrogen energy applications.
Key Features
- High-porosity carbon paper gas diffusion layer platform
- Carbon fiber backing with microporous layer (MPL)
- Supports efficient gas transport and water management
- Good electrical conductivity and low area-specific resistance
- Suitable for PEM fuel cells and related electrochemical systems
- Available in two thickness grades for different stack design requirements
Technical Specifications
| Property | 22 BB | 39 BB | Unit |
|---|---|---|---|
| Product Grade | SIGRACET® 22 BB | SIGRACET® 39 BB | — |
| Structure | Carbon paper GDL with MPL | Carbon paper GDL with MPL | — |
| Typical Thickness | 215 | 315 | µm |
| Area Weight | 70 | 95 | g/m² |
| TP Gas Permeability (Gurley) | 1.2 | 1.5 | sec |
| TP Gas Permeability (1 MPa) | 0.47 | 0.12 | 10⁻¹² m² |
| IP Gas Permeability | 2.8 | 8.40 | 10⁻¹² m² |
| TP Area-Specific Resistance (1 MPa) | < 10 | < 13 | mΩ·cm² |
| TP Thermal Conductivity | 0.30 | 0.20 | W·m⁻¹·K⁻¹ |
| Compressibility (5 psi → 1.0 MPa) | 20 | 27 | % |
| Water Contact Angle (MPL) | > 130 | > 130 | ° |
| Roughness Ra (MPL Side) | 7.2 | 7.0 | µm |
| Impurities (Fe, Co, Ni) | < 10 | < 10 | ppm |
Applications
- PEM fuel cells
- Fuel cell stack development and integration
- Automotive and stationary PEMFC systems
- MEA and electrochemical component development
- PEM electrolysis and related hydrogen technologies
- Research, testing and pilot-scale industrial use
Commercial Note
Prices shown on this page are indicative reference prices and may vary depending on quantity, packaging format and market conditions. Listed prices exclude VAT, shipping and any custom cutting, slitting or packaging services. Bulk orders, customized dimensions and distributor cooperation are available upon request. Please contact us for detailed quotations and technical support.
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