Sammanfattning
Anion exchange membrane water electrolysis (AEMWE) has a great potential to be established as a high-performance and low-capital cost technology for hydrogen production. High current densities can be achieved with non-platinum group metal (non-PGM) catalyst. However, the harsh operation conditions require stable cell components. Here, we report on the use of a highly stable and ion conductive poly(fluorene alkylene) membrane (PdF-TMA) tethered with trimethylammonium cations via phenylpropyl side chains for AEMWEs operating with 2 M aqueous KOH. The ether-free PdF-TMA polymer is efficiently prepared by polyhydroxyalkylation to reach a molecular weight of 236 kDa, a high thermal stability, and an ion-exchange capacity of 2.14 mequiv. g-1 (OH− form). Using commercial electrodes of NiFe2O4 (anode) and Raney Nickel (cathode) and PdF-TMA as AEM, the output current reached 1 A cm-2 at below 1.9 V at 60 °C. Also, PdF-TMA outperformed AEMIONTM membrane resistance by almost 30% and, after 100 h at 0.5 A cm-2, did not reveal any loss of conductivity, contrary to AEMIONTM. Furthermore, both membranes were analysed by 1H NMR spectroscopy after AEMWE tests and the PdF-TMA proved very stable even at 80 °C.
Originalspråk | engelska |
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Sidor (från-till) | 12826-12834 |
Antal sidor | 9 |
Tidskrift | Journal of Materials Chemistry A |
Volym | 12 |
Nummer | 21 |
DOI | |
Status | Published - 2024 |
Ämnesklassifikation (UKÄ)
- Polymerteknologi
- Energisystem
- Polymerkemi
- Materialkemi