Table 3. Characteristic Parameter Comparison of Commercial State of the Art GDLs (TPGH: Toray; FB: Freudenberg) with 3D-Printed Materiala.
| Property | TPH-090 | FB H2315C2 | 3DTP |
|---|---|---|---|
| MPL | No | Yes | No |
| Electr. conductivity (S/m) | 15,00035 | ∼8400 | ∼1600 |
| Permeability (m–2) | 1.7 × 10–11 | 8.6 × 10–12 (GDL)36 | 1.57 × 10–9 |
| Effective diffusivity (−) | 0.325 | 0.366 (GDL)37 | 0.81 |
| Porosity (−) | 0.7 | 0.8 (GDL)38/0.56 (MPL)39 | 0.88 |
| Thickness (μm) | 270 | 235 | 500 |
a
The electrical conductivity is in-plane conductivity. Permeability and diffusivities are given for the through-plane direction.