Poly(fluorene)‐Based Anion Exchange Membrane Demonstrating Excellent Durability at 1.5 A cm<sup>‒2</sup> for 2400 h in Water Electrolyzers
Abstract Anion exchange membrane water electrolyzer (AEMWE) is a cost‐effective alternative to proton exchange membrane water electrolyzer for green hydrogen production. However, AEMWE commercialization is hindered primarily by the lack of a reliable anion exchange membrane (AEM) for long‐term cell durability. In this study, a poly(fluorene)‐based PFAA‐QA AEM is developed with a simple structure, exhibiting satisfactory OH − conductivity (>174.6 mS cm −1 at 80 °C), good mechanical properties (tensile strength >35 MPa and elongation at break >51%), and excellent alkaline stability (>2000 h in 3 m KOH at 80 °C). These characteristics allow PFAA‐QA‐based AEMWEs to demonstrate a high cell performance (3.95 A cm −2 at 70 °C and 1.95 V) and long‐term durability at high current densities (1.5 A cm −2 for 2400 h at 70 °C). Therefore, the durability of these AEMWEs surpasses that of most AEMWEs with a low voltage decay rate (>29 mV kh −1 ).
Authors
- Nam In Kim (ORCID: https://orcid.org/0009-0004-4326-8143)
- Sungryong Kim (ORCID: https://orcid.org/0000-0001-7423-3884)
- Gi Won Shin (ORCID: https://orcid.org/0000-0002-1865-5019)
- Sung Mook Choi (ORCID: https://orcid.org/0000-0001-7230-3359)
- Jun Ho Lee (ORCID: https://orcid.org/0000-0002-4075-3504)
- Taiho Park (ORCID: https://orcid.org/0000-0002-5867-4679)
- Chiho Kim (ORCID: https://orcid.org/0000-0002-1535-9791)
- Shin‐Woo Myeong
- Haeryang Lim
Institutions
- Pohang University of Science and Technology (KR)
- Korea Institute of Materials Science (KR)
- Korea University of Science and Technology (KR)
Publication Details
- Journal
- Advanced Energy Materials
- Published
- 2025-05-02
- DOI
- https://doi.org/10.1002/aenm.202501038
- Citations
- 12
- Primary Topic
- Fuel Cells and Related Materials
- Type
- article
- Field-Weighted Citation Impact
- 8.77
Funders
- Ministry of Science and ICT, South Korea