Description
Overview
SIGRACET® 28 BC and 36 BB are carbon paper gas diffusion layers (GDLs) with microporous layer (MPL), designed for PEM fuel cells and related electrochemical applications. Acting as functional interfaces within the membrane electrode assembly, they support gas transport, water management, heat dissipation and electrical conductivity. Belonging to the same SIGRACET® low / medium porosity platform, 28 BC has a typical thickness of 235 µm and 36 BB has a typical thickness of 280 µm. Both grades are widely used in fuel cell development and are suitable for laboratory evaluation, stack integration, pilot-scale validation and industrial hydrogen energy systems.
Key Features
- Carbon paper gas diffusion layer with microporous layer (MPL)
- Low / medium porosity platform for balanced transport and compression behavior
- Reliable gas transport, water management and electrical conductivity
- Low area-specific resistance for efficient cell performance
- Suitable for PEM fuel cells and related electrochemical systems
- Available in two grades for different stack and operating requirements
Technical Specifications
| Property | 28 BC | 36 BB | Unit |
|---|---|---|---|
| Product Grade | SIGRACET® 28 BC | SIGRACET® 36 BB | — |
| Porosity Type | Low porosity | Medium porosity | — |
| Structure | Carbon paper GDL with MPL | Carbon paper GDL with MPL | — |
| Typical Thickness | 235 | 280 | µm |
| Area Weight | 105 | 105 | g/m² |
| TP Gas Permeability (Gurley) | 4.5 | 3.0 | sec |
| TP Gas Permeability (1 MPa) | 0.10 | 0.21 | 10⁻¹² m² |
| IP Gas Permeability | 0.9 | 1.8 | 10⁻¹² m² |
| TP Area-Specific Resistance (1 MPa) | < 11 | < 12 | mΩ·cm² |
| IP Electric Resistance | 0.21 | 0.27 | Ω·mm |
| TP Thermal Conductivity | 0.38 | 0.43 | W·m⁻¹·K⁻¹ |
| Compressibility (5 psi → 1.0 MPa) | 11 | 14 | % |
| Water Contact Angle (MPL) | > 130 | > 130 | ° |
| Roughness Ra (MPL Side) | 6.4 | 5.8 | µm |
| Impurities (Fe, Co, Ni) | < 10 | < 10 | ppm |
Applications
- PEM fuel cells
- Automotive and stationary PEMFC systems
- MEA and stack development
- PEM electrolysis and related electrochemical applications
- Hydrogen energy systems
- Research, pilot production and industrial evaluation
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.
Reviews
There are no reviews yet.