Table 1.
Ex situ characterization data of the most promising Fumatech membranes for each category compared to Nafion® 115.
| Membrane Acronym | Unit | F-1850 | E-730 | FZP-960 | FX-7050 | N-115 |
|---|---|---|---|---|---|---|
| Polymer Type | PFSA | sPEEK | PFSA-ZrP | PFSA Cross-Linked | PFSA | |
| Filler content | – | – | – | 10% | – | – |
| EW (theoretical) | g/mol | 1800 | 740 | 950 | 7000 | 1100 |
| IEC (exp.) | mmol/g | 0.50 | 1.35 | 0.83 | 0.63 | 0.9 |
| Thickness (dry) | µm | 50 | 30 | 60 | 50 | 125 |
| Solvent uptake in MeOH at 25 °C | Wt % | 30 | 38 | 115 | 33 | 54 |
| Length increase Δl in MeOH at 25 °C | % | 18 | 10 | 46 | 8 | 31 |
| Conductivity in H2O at T = 25 °C | mS·cm−1 | 58 | 16 | 23 | 56 | 62 |