AvCarb P50 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 P50 substrates are highly durable, both chemically and mechanically.

AvCarb P50 is the base substrate used in GDS1120 gas diffusion layer.

AvCarb Carbon Papers Properties Sheet

Gas Diffusion Layer Properties
Material Type	Carbon Paper Substrate
Nominal Thickness	150 microns (@ 7.3psi / 5.1 N/cm²)
Bulk Density	0.31 g/cm3 (@ 0.69 N/cm3 / 1psi)
Break Strength machine direction	5.0 MPa
Break Strength cross machine direction	3.0 MPa
Basis Weight	50 g/m2
Compressibility	11.5% ((22N - 113N)/22 x 100%)
Stiffness machine direction	7.5 Taber
Stiffness cross machine direction	3.0 Taber
Air Permeability (through-plane)	35 sec/100cc
Air Permeability (in-plane)	295 sec/100cc
X-Through-Plane Resistivity	6.7 mOhm*cm²
Microporous Layer (MPL)	None
Substrate PTFE Treatment	None