Freudenberg E20 is carbon paper that is designed to work in PEM electroyzer as the cathode gas diffusion layer. This is a carbon paper without MPL and has no Teflon treatment (or no hydrophobic treatment). It has a thickness of ~180 µm (microns or micrometers) under 1 MPa compression.

Freudenberg E20 is recommended for:

-Low temperature proton exchange membrane (LT-PEM) electrolyzer applications

Freudenberg Fuel Cell and Electrolyzer Carbon Paper GDLs Technical Data Sheet

Freudenberg Fuel Cell and Electrolyzer Carbon Paper GDLs SDS

Gas Diffusion Layer Properties
X-Material Type	Carbon Fiber Paper
Thickness	0.180 mm (180 microns) @ 1 MPa Compression
X-Basic Weight (g/m²)	95 g/m²
Air Permeability (s)	400 l/m2.s (DIN EN ISO 9237, TP Air Permeability)
X-Electrical Resistivity	5.3 mOhm.cm2 (TP electrical resistance @ 1 MPa compression)
Substrate PTFE Treatment	None
Microporous Layer	None