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High performance water electrolysis using a poly(fluorene phenylpropylammonium) anion-exchange membrane with 2 M aqueous KOH

Rossini, Matteo ; Pan, Dong LU ; Koyutürk, Burak ; Chen, Si LU ; Khataee, Amirreza ; Lindbergh, Göran ; Jannasch, Patric LU orcid and Cornell, Ann (2024) In Journal of Materials Chemistry A
Abstract
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.... (More)
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.
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Contribution to journal
publication status
epub
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in
Journal of Materials Chemistry A
publisher
Royal Society of Chemistry
ISSN
2050-7488
DOI
10.1039/D4TA01057D
language
English
LU publication?
yes
id
85e32a71-2cae-4c64-860f-902524c4e435
date added to LUP
2023-03-13 10:30:12
date last changed
2024-05-07 20:29:56
@article{85e32a71-2cae-4c64-860f-902524c4e435,
  abstract     = {{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<sup>-1</sup> (OH<sup>−</sup> form). Using commercial electrodes of NiFe2O4 (anode) and Raney Nickel (cathode) and<br/>PdF-TMA as AEM, the output current reached 1 A cm<sup>-2</sup> at below 1.9 V at 60 °C. Also, PdF-TMA outperformed AEMION<sup>TM</sup> membrane resistance by almost 30% and, after 100 h at 0.5 A cm<sup>-2</sup>, did not reveal any loss of conductivity, contrary to AEMION<sup>TM</sup>. Furthermore, both membranes were analysed by <sup>1</sup>H NMR spectroscopy after AEMWE tests and the PdF-TMA proved very stable even at 80 °C.<br/>}},
  author       = {{Rossini, Matteo and Pan, Dong and Koyutürk, Burak and Chen, Si and Khataee, Amirreza and Lindbergh, Göran and Jannasch, Patric and Cornell, Ann}},
  issn         = {{2050-7488}},
  language     = {{eng}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Journal of Materials Chemistry A}},
  title        = {{High performance water electrolysis using a poly(fluorene phenylpropylammonium) anion-exchange membrane with 2 M aqueous KOH}},
  url          = {{http://dx.doi.org/10.1039/D4TA01057D}},
  doi          = {{10.1039/D4TA01057D}},
  year         = {{2024}},
}