Summary of the mechanical properties and proton conductivity for the PBI based nanocomposite and 6FPBI-related membranes.
| Acid-doped membrane | Filler content (wt%) | Doping level | Tensile strength (MPa) | Strain at break (%) | Proton conductivity (S cm−1) | Reference |
|---|---|---|---|---|---|---|
| CNF–aminobenzyl/6FPBI | 0.3 | 12.0 | 12.5 | 96.4 | 0.20 (at 160 °C) | Present work |
| PBI/MGO | 1.2 | 12.2 | 12.6 | 150.1 | 0.13 (at 160 °C) | 24 |
| cPBI/RGO | 1.0 | 12.5 | 19.3 | — | 0.59 (at 170 °C) | 26 |
| PyPBI/PGO | 1.5 | 9.9 | 4.6 | 139.2 | 0.76 (at 140 °C) | 27 |
| PBI–CNT | 1.0 | 8.0 | 39 | ∼8 | 0.74 (at 180 °C) | 23 |
| PBI–clay | 15 | 12.0 | 0.9 | 53.1 | 0.12 (at 150 °C) | 58 |
| F6PBIa | 0 | 8.8 | 29.3 | 84.2 | 0.06 (at 160 °C) | 59 |
| 6FPBI | 0 | 10.9 | 9.7 | 86.1 | 0.14 (at 160 °C) | Present work |
| F6PBI–10% R3a | 0 | 14.0 | 9.7 | 20.7 | ∼0.65 (at 180 °C) | 60 |
a
The chemical structure of F6PBI is identical to 6FPBI used in the present work.