AvCarb P75 Gas Diffusion substrates are unparalleled in their ability to meet the rigorous demands of the fuel cell, including platinum catalyst and functional layer support, effective transport of gases and liquids, and conduction of heat and electricity. Moreover AvCarb P75 substrates are highly durable, both chemically and mechanically.
AvCarb P75 is the base substrate used in the gas diffusion layers: GDS2230, GDS2240, GDS22100, and GDS2120.
| Gas Diffusion Layer Properties | |
| Material Type | Carbon Paper Substrate |
| Nominal Thickness | 205 microns (@ 7.3psi / 5.1 N/cm²) |
| Bulk Density | 0.29 g/cm3 (@ 0.69 N/cm3 / 1psi) |
| Break Strength machine direction | 6.5 MPa |
| Break Strength cross machine direction | 3.9 MPa |
| Basis Weight | 75 g/m3 |
| Compressibility | 10.7% ((22N - 113N)/22 x 100%) |
| Stiffness machine direction | 20.0 Taber |
| Stiffness cross machine direction | 3.5 Taber |
| Air Permeability (through-plane) | 15 sec/100cc |
| Air Permeability (in-plane) | 83 sec/100cc |
| X-Through-Plane Resistivity | 7.8 mOhm*cm² |
| Microporous Layer (MPL) | None |
| Substrate PTFE Treatment | None |
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