Description
Sigracet 28 BC is a premium non-woven carbon fiber paper that incorporates a Microporous Layer (MPL) and a 5 wt% PTFE hydrophobic treatment. With a total thickness of approximately 235 µm, it offers a balanced combination of mechanical strength, electrical conductivity, and superior water management for Proton Exchange Membrane Fuel Cells (PEMFCs).
The PTFE treatment ensures excellent water-repellent characteristics, preventing flooding within the highly porous carbon structure and maintaining optimal gas diffusion. This hydrophobic behavior enhances durability and contributes to consistent cell performance across varying humidity and load conditions.
Designed for both robustness and reliability, the Sigracet 28 Series delivers enhanced production consistency and performance stability. Developers and system integrators benefit from:
- Exceptional inter-lot and intra-lot uniformity, maintaining variability within ±10% (2 sigma)
- Improved surface flatness, ensuring uniform compression and electrical contact
- Significantly reduced defect frequency during roll-to-roll manufacturing
- Reliable operation under diverse environmental and operating conditions
Sigracet 28 BC serves as a cost-effective, high-quality alternative to traditional woven carbon paper Gas Diffusion Layers (GDLs). It is particularly well-suited for PEM fuel cell systems in both stationary and automotive applications.
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28 - BC |
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Material Properties |
Value |
Units |
|
Thickness |
235 |
µm |
|
Area Weight |
105 |
gm2 |
|
TP Gas Permeability |
4.5 |
Gurley sec |
|
TP Gas Permeability [1 Mpa] |
0.10 |
10-12m2 |
|
TP area-specific resistance [1 Mpa] |
<11 |
mΩcm2 |
|
Thermal Conductivity |
0.38 |
Wm-1K-1 |
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