1
/
of
8
Franklab
SGL Sigracet Carbon Paper
SGL Sigracet Carbon Paper
Regular price
$21.50 USD
Regular price
Sale price
$21.50 USD
Shipping calculated at checkout.
Quantity
Couldn't load pickup availability
Share
Product Description
SGL SIGRACET® Carbon Paper
Premium Carbon Fiber-Based Gas Diffusion Media for Fuel Cells & Electrochemical Systems
SIGRACET® carbon paper from SGL Carbon is a high‑performance gas diffusion layer (GDL) material widely used in PEM fuel cells, electrolyzers, metal‑air batteries, and advanced electrochemical research. A gas diffusion layer plays a critical role in enabling efficient gas transport, effective water management, and robust electrical conductivity between catalyst layers and current collectors. (SGL Carbon)
Available Models & Sizes
Common SIGRACET® GDL Grades
| Model | Typical Thickness | Areal Weight | Structure |
| 22BB | ~215 µm | ~70 g/m² | Non‑woven carbon paper with MPL |
| 28BC | ~235 µm | ~105 g/m² | Non‑woven carbon paper with MPL |
| 36BB | ~280 µm | ~105 g/m² | Non‑woven carbon paper with MPL |
| 39BB | ~315 µm | ~95 g/m² | Non‑woven carbon paper with MPL |
All models include a hydrophobic microporous layer (MPL) with PTFE for improved water management and flood prevention. (SGL Carbon)
Typical Sizes (cm)
-
5 × 5 cm
-
10 × 10 cm
-
20 × 20 cm
-
30 × 30 cm
-
40 × 40 cm
Custom sizes available upon request.
Technical Specifications
| Property | 22BB | 28BC | 36BB | 39BB |
| Thickness | 215 ± 20 µm | 235 ± 25 µm | 280 ± 20 µm | 315 ± 20 µm |
| Areal Weight | 70 ± 15 g/m² | 105 ± 10 g/m² | 105 ± 15 g/m² | 95 ± 15 g/m² |
| Electrical Resistivity (through plane) | <10 mΩ·cm² | <11 mΩ·cm² | <12 mΩ·cm² | <13 mΩ·cm² |
| Thermal Conductivity | ~0.30 W/m·K | ~0.38 W/m·K | ~0.43 W/m·K | ~0.20 W/m·K |
| Gas Permeability (Gurley) | ~1.2 sec | ~4.5 sec | ~3.0 sec | ~1.5 sec |
| Compressibility (1 MPa) | ~20% | ~11% | ~14% | ~27% |
| Bending Stiffness (MD/TD) | 1.5/0.9 N·mm | 1.7/1.2 N·mm | 3.6/3.2 N·mm | 3.5/2.9 N·mm |
| Water Contact Angle (MPL) | >130° | >130° | >130° | >130° |
| Tensile Strength (MD/TD) | ~6.9/4.6 MPa | ~6.6/5.1 MPa | ~8.5/8.1 MPa | ~7.7/4.9 MPa |
| PTFE Treatment | ~5 wt% (substrate) + MPL | ~5 wt% + MPL | ~5 wt% + MPL | ~5 wt% + MPL |
Data are typical values and may vary by lot and processing. (SGL Carbon)
Product Features & Benefits
Advanced Gas Diffusion Technology
•PTFE‑treated microporous layer (MPL) prevents flooding and supports effective water management crucial for PEM fuel cells and electrolyzers. (SGL Carbon)
•Hydrophobic surface with high water contact angle (>130°) improves gas/liquid separation. (SGL Carbon)
Optimized for Electrochemical Performance
•Balanced electrical conductivity and thermal stability enhance stack efficiency and long‑term reliability. (SGL Carbon)
•Controlled compressibility supports uniform contact pressure and stable cell assembly.
Mechanical Robustness
•Reinforced carbon fiber matrix delivers excellent bending stiffness and tensile strength for stack assembly. (SGL Carbon)
High Manufacturing Consistency
•Engineered for low intra‑ and inter‑lot variability and high surface flatness, ensuring reproducibility between batches. (Beyond Battery)
Typical Applications
•PEM Fuel Cells — Gas diffusion media in both cathode and anode electrodes.
•PEM Electrolyzers — Electrochemical water splitting systems requiring reliable gas/water transport.
•Metal–Air Batteries — Gas electrode support layers for Zn‑air or Li‑air systems.
•Electrochemical Research — Bench‑scale and industrial research where water management and conductivity are essential.
SIGRACET® GDLs are commonly selected based on operating conditions such as desired porosity, thickness, and conductivity for high current density systems. (SGL Carbon)
How to Choose the Right SIGRACET® GDL
•High Porosity & Water Management: 39BB is often used where excellent gas transport and water control are critical.
•Balanced Performance: 28BC provides good mechanical and gas diffusion performance for general PEMFC and stationary applications.
•Increased Thickness & Strength: 36BB offers higher thickness and stiffness, beneficial for systems with higher compression loads.
•Cost‑Effective GDL: 22BB provides lower thickness and weight with essential performance where minimal material bulk is important.
Customization Options
•Custom sizes and roll formats
•Specific thickness and treatment levels
•Batch traceability documentation
Packaging & Handling
•Clean, protective packaging
•Rolls, sheets, or stacked formats
•Sensitive to dust — handle with clean tools
Contact & Support
For custom specifications, bulk orders, or technical inquiries, please contact us:
Email: support@franklab.shop