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AvCarb P75T – Wet Proof

In combination with Ballard Power Systems’ leadership and expertise in the development and manufacturing of proton exchange membrane (PEM) fuel cells, Ballard Material Products (BMP) introduces its AvCarb Grade-P75T carbon fiber paper. Specifically developed for gas diffusion layer (GDL) applications in PEM fuel cells and other applications requiring a conductive substrate, AvCarb P75T is a carbon particle-filled, polyacrylonitrile (PAN) based carbon fiber paper manufactured utilizing BMP’s exclusive AccuCarb continuous carbonization process. Under development for over two years, Ballard’s AvCarb P75T has the potential for becoming the lowest cost GDL available, thus providing a stimulus for the growth of fuel cell applications.

AvCarb P75T is the result of Ballard identifying key electrical, mechanical and gas/liquid diffusion properties needed by GDL users and designing a product to meet those requirements. AvCarb P75T is a baseline product that can be design modified to optimize specific performance characteristics. With its hydrophobic coating,the AvCarb P75T minimizes the effects of moisture exposure, enhances performance, provides durability and facilitates handling.

Product Description

Material Type : Carbon Paper Substrate
Nominal Thickness (@ 1psi / 0.7 N/cm²) : .255 mm (255 microns)
Nominal Thickness (@ 7.3psi / 5.1 N/cm²) : .240 mm (240 microns)
Nominal Basis Weight : 85 g/m3
Break Strength machine direction : 20 MPa
Break Strength cross machine direction : 12.6 MPa
Stiffness machine direction : 12 Taber
Stiffness cross machine direction : 14.6 Taber
Bulk Density (@ 0.69 N/cm3 / 1psi) : 0.33 g/cm3
Air Permeability (Gurley) through-plane : 25 sec/100cc
Air Permeability (Gurley) in-plane : 26 sec/100cc
Compressibility ((22N – 113N)/22 x 100%) : 11%
Through-Plane Resistivity : 13.4 mOhm*cm²
PTFE Treatment : 13 wt%
Microporous Layer (MPL) : None

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