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Incorporating chrysene units to improve the performance of poly(arylene piperidinium) and poly(arylene quinuclidinium) anion exchange membranes for water electrolysis

Luong, Triet Nguyen Dai LU and Jannasch, Patric LU orcid (2026) In Journal of Materials Chemistry A
Abstract
Chrysene-containing polymers functionalized with piperidinium- and quinuclidinium cations, respectively, are prepared by polyhydroxyalkylation and studied as anion exchange membranes (AEMs). Experimental results, supported by theoretical considerations, indicate that the chrysene units significantly enhance alkaline stability; a poly(chrysene piperidinium) AEM shows only 16% total ionic loss, compared to 37% for a corresponding poly(terphenyl piperidinium) benchmark after 20 days in 5 M NaOH at 90 °C. Quinuclidinium-functional AEMs show an even higher stability without any detectable degradation or ionic loss after the same conditions during 40 days. In addition, the chrysene units promote microphase separation, facilitating hydroxide... (More)
Chrysene-containing polymers functionalized with piperidinium- and quinuclidinium cations, respectively, are prepared by polyhydroxyalkylation and studied as anion exchange membranes (AEMs). Experimental results, supported by theoretical considerations, indicate that the chrysene units significantly enhance alkaline stability; a poly(chrysene piperidinium) AEM shows only 16% total ionic loss, compared to 37% for a corresponding poly(terphenyl piperidinium) benchmark after 20 days in 5 M NaOH at 90 °C. Quinuclidinium-functional AEMs show an even higher stability without any detectable degradation or ionic loss after the same conditions during 40 days. In addition, the chrysene units promote microphase separation, facilitating hydroxide conductivity, which reaches up to 182 mS cm−1 at 80 °C. A selected AEM containing 25% chrysene units is evaluated in a water electrolyzer (AEMWE) single cell with plain Ni foams as electrodes, reaching a current density of 704 mA cm−2 at 2.5 V and 90 °C, thereby outperforming a benchmark PiperION® AEM under the same conditions. An in-situ durability test at 500 mA cm−2 during 200 h at 90 °C further confirms the high performance of the AEM. This study demonstrates the significant improvements in AEM stability, hydroxide conductivity, and electrolyzer performance achievable by incorporating chrysene units in the polymer backbone. (Less)
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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/D5TA10393B
language
English
LU publication?
yes
id
9cbb32c2-4be6-4b05-b8f6-006ae1f6d4f4
date added to LUP
2025-09-11 17:23:00
date last changed
2026-03-17 14:36:01
@article{9cbb32c2-4be6-4b05-b8f6-006ae1f6d4f4,
  abstract     = {{Chrysene-containing polymers functionalized with piperidinium- and quinuclidinium cations, respectively, are prepared by polyhydroxyalkylation and studied as anion exchange membranes (AEMs). Experimental results, supported by theoretical considerations, indicate that the chrysene units significantly enhance alkaline stability; a poly(chrysene piperidinium) AEM shows only 16% total ionic loss, compared to 37% for a corresponding poly(terphenyl piperidinium) benchmark after 20 days in 5 M NaOH at 90 °C. Quinuclidinium-functional AEMs show an even higher stability without any detectable degradation or ionic loss after the same conditions during 40 days. In addition, the chrysene units promote microphase separation, facilitating hydroxide conductivity, which reaches up to 182 mS cm<sup>−1</sup> at 80 °C. A selected AEM containing 25% chrysene units is evaluated in a water electrolyzer (AEMWE) single cell with plain Ni foams as electrodes, reaching a current density of 704 mA cm<sup>−2</sup> at 2.5 V and 90 °C, thereby outperforming a benchmark PiperION<sup>®</sup> AEM under the same conditions. An in-situ durability test at 500 mA cm<sup>−2</sup> during 200 h at 90 °C further confirms the high performance of the AEM. This study demonstrates the significant improvements in AEM stability, hydroxide conductivity, and electrolyzer performance achievable by incorporating chrysene units in the polymer backbone.}},
  author       = {{Luong, Triet Nguyen Dai and Jannasch, Patric}},
  issn         = {{2050-7488}},
  language     = {{eng}},
  publisher    = {{Royal Society of Chemistry}},
  series       = {{Journal of Materials Chemistry A}},
  title        = {{Incorporating chrysene units to improve the performance of poly(arylene piperidinium) and poly(arylene quinuclidinium) anion exchange membranes for water electrolysis}},
  url          = {{http://dx.doi.org/10.1039/D5TA10393B}},
  doi          = {{10.1039/D5TA10393B}},
  year         = {{2026}},
}