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Graphitized Carbon Papers

Porous Graphitized Paper and Panels

CAPLINQ offers the full range of Engineered Fibers Technology Gas Diffusion Layers (GDL) products. Please click here to get an overview of all the Gas Diffusion Layer products offered by EFT Fibers, or click on the following link to be directed immediately to the range of Activated Carbon Fabric products.

Spectracarb 2050 Series Porous Graphitized Sheets and Panel

Spectracarb™ 2050 Gas Diffusion Layer (GDL) sheets are porous “graphitized” resin bonded carbon fiber papers and multi-ply panels specifically designed for use in PEM, DMFC and PAFC fuel cells, Electrolyzers, Humidifiers and Other Electrochemical Devices

These products are optimized for the following properties:

Electrical Conductivity
Mechanical Strength and Durability
Gas/Air Permeability
Water Management

Spectracarb GDLs are produced in the USA and are available in a wide range of standard and custom grades, densities, sizes and materials for fuel cells, electrolyzers, humidifiers, specialty batteries and other electrochemical applications.

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Spectracarb 2050A Series Graphitized Carbon Fiber GDL Sheets
- Spectracarb 2050A Series
- Gas Diffusion Layer Sheets
- Carbon fiber
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Graphitized Carbon Sheet Comparison Table
General	Specific	Application	Spectracarb GDL Series
General	Specific	Application	Spectracarb 2050A	Spectracarb 2050HF	Spectracarb 2050HT	Spectracarb 2050L	Spectracarb 2050P	Spectracarb 2050WP
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Energy Industry	Energy Storage, Fuel Cells	Fuel Cells PEM / DMFC / PAFC
		Redox Flow Batteries
		Electrolyzers
		Humidifiers
Product Properties
Range of Densities Available			0.25 g/cc to 1.0 g/cc
Range of Thicknesses Available			5 mils to 200 mils 125 micron to 5000 micron (5mm)
Standard Grade
Increased Permeability
Higher Electrical Conductivity
Improved Corrosion Resistance
Lower Max Temperature / Lower Cost
Higher Purity / Trace Elements <0.5ppm
Wet-Proofed / Microporous Hydrophobic Layer

Advantages of EFT Fibers' Spectracarb Series GDLs

Spectracarb GDL has a specific technology focus:

Widest Range of Production Grades Available
Lower Cost Products
Small / Specialty Orders Accepted
Experimental & Developmental Formulations (Laboratory /Pilot Scale)
Contract Research /Joint Development Programs for Special Requirements
Established 22 Year Manufacturing History (Spectracorp Founded 1991)

Spectracarb GDL 2050 Series Sizes, Thicknesses and Densities

All of the Spectracarb 2050 Series GDL sheet sizes are 400 x 400 mm for thin (paper) grades, and 450 x 450 mm for laminated panels, with sizes up to 550 x 550 mm available as special order. Sheet thicknesses range from as low as 5 mils (125 micron) to as thick as 200 mils (5 millimeters). Densities of the panels range from as low as 0.25 g/cc to 1 g/cc. Custom sizes, machined discs, and other customer defined sizes and shapes, as well as machining such as channels and surface grinding are also available.

Spectracarb GDL 2050 Series Grades

2050 A: Standard grade 2050A is our base series graphitized paper and panels used mainly in PEM fuel cells and electrolyzers. Properties of thin papers comparable with other GDL’s used in industry, but with wider selection of density and thickness.
2050 HF: Other special grades include “2050 HF” with higher mean pore size and increased permeability.
2050 HT: Spectracarb GDL can also be manufactured in the density and thickness ranges shown above, but using modified processing to achieve higher electrical conductivity and improved corrosion resistance with our ”2050 HT” Series for use in PAFC and other special products.
2050 L: Spectracarb GDL thin papers and thicker panels can also be provided on special order in a “2050 L” grade which is carbonized at a lower maximum temperature to provide a lower cost product for humidifiers and other special products.
2050 P: Both papers and panels can also be provided on special order in our “2050 P Series” where additional purification can be conducted to provide trace elements
2050 WP: Wet proofed grades incorporating a microporous hydrophobic layer of any of the Spectracarb series can be provided through a partner company.
Customer Specific Grades: It is also possible to make Hybrid constructions in the Multi-layer constructions. Contact us to discuss any special requirements, or for the design and production of grades for your specific requirement.