Freudenberg H23C3 is a flexible and easy to use carbon paper Gas Diffusion Layer (GDL) with a Microporous Layer (MPL) as well as a hydrophobic treatment. It is recommended for low humidity systems, open cathode designs and air systems. It is 235 um (microns) thick @ 1 MPa compression.

Freudenberg H23C3 is designed to keep the membrane wet. It is used in high temperature or very dry fuel cell applications.

Freudenberg H23C3 is recommended for:

• Power densities up to 0.5A/cm²
• Stationary CHP Low humidified cathodes
• Low Temperature Polymer Electrolyte Fuel Cell (LT-PEMFC) Backup, Air-cooled, and Off-Grid applications

Freudenberg H23C3 is formerly known as H2315 I2 C3.

Freudenberg Carbon Paper GDL Properties Sheet

Freudenberg Fuel Cell and Electrolyzer Carbon Paper GDLs SDS

Gas Diffusion Layer Properties
X-Material Type	Carbon Fiber Paper
Thickness	.235 mm (235 microns) @ 1 MPa Compression
Air Permeability (s)	15 (TP Air Permeability acc. to Gurley (ISO 5636-5))
Electrical Resistivity (through plane)	9 mΩ/cm² (TP Electrical Resistance @ 1 MPa compression)
Substrate PTFE Treatment	Yes, (proprietary PTFE % value)
Microporous Layer	Yes, on one side (with proprietary PTFE % value)