Poly(arylene alkylene)s with pendent benzyl-tethered ammonium cations for anion exchange membranes

Bakvand, Pegah Mansouri; Jannasch, Patric

doi:10.1016/j.memsci.2022.121229

Cited by 25 publications

(14 citation statements)

References 60 publications

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“…The evident ionic conductivity reductions of the QAPCE-1.4P and QAPCE-1.4C membranes in the first 20 days, as shown in Figure , are owing to the degradation of the cationic groups . According to previous reports, the cationic groups would be attacked by OH – in an alkali condition at high temperatures, thus causing a decrease in the hydroxide ion conductivity. – During the next 20 days, the ionic conductivity of the tested membranes declined slowly until it reached a plateau, and the final conductivity retentions of QAPCE-1.4P and QAPCE-1.4C were 96.1 and 90.1%, respectively. According to this result, QAPCE-1.4P exhibits a higher alkaline resistance than QAPCE-1.4C.…”

Section: Resultsmentioning

confidence: 64%

Modification of Hydrophobic Diacid Units for Enhanced Poly(crown ether) Anion-Exchange Membrane Performance

Chen,

Lai,

Choo

et al. 2023

ACS Appl. Energy Mater.

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Ideal anion-exchange membranes (AEMs) for anion-exchange membrane fuel cells (AEMFCs) must possess high OH − conductivity, excellent alkaline resistance, good thermal stability, and improved dimensional stability. In this study, four types of poly(crown ether) (PCE) cross-linked AEMs containing different aromatic or alicyclic dicarboxylic acids were prepared for AEMFCs. The hydrophilic/hydrophobic polarity discrimination of AEMs can be adjusted by the introduction of various diacids into the polymer backbones. As a result, an obvious microphase-separated structure will form in AEMs, which may aid the movement of hydroxide ions. The as-prepared QAPCE-1.4P membranes with 1,4-phenylenediacetic acid as the dicarboxylic acid exhibit a distinct micromorphology separation, as confirmed by morphology characterization using small-angle X-ray scattering, atomic force microscopy, as well as transmission electron microscopy. The highest hydroxide ion conductivity of QAPCE-1.4P at 80 °C in ultrapure water is 133.25 mS cm −1 . Meanwhile, QAPCE-1.4P shows an improved dimensional stability at 80 °C with a swelling ratio of 10.83%. In addition, QAPCE-1.4P shows good chemical stability (96.1% ionic conductivity retention) even after being put in harsh alkali conditions at 80 °C for 40 days. Furthermore, the maximum power density of a single cell using QAPCE-1.4P as the polymer electrolyte membranes can reach 689 mW cm −2 in hydrogen/oxygen (80 °C).

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Section: Resultsmentioning

confidence: 64%

Modification of Hydrophobic Diacid Units for Enhanced Poly(crown ether) Anion-Exchange Membrane Performance

Chen,

Lai,

Choo

et al. 2023

ACS Appl. Energy Mater.

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“…(a) General scheme of acid-catalyzed Friedel–Crafts polycondensations and representative chemical structure. − ,, (b) Chemical structure of poly(carbazole) membrane and related H 2 /O 2 fuel cell and water electrolytic performance. (c) Chemical structure of QABP-2 and related fuel cell performance.…”

Section: Types Of Alkaline Membranesmentioning

confidence: 99%

Alkaline Membranes toward Electrochemical Energy Devices: Recent Development and Future Perspectives

et al. 2023

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Anion-exchange membranes (AEMs) that can selectively transport OH–, namely, alkaline membranes, are becoming increasingly crucial in a variety of electrochemical energy devices. Understanding the membrane design approaches can help to break through the constraints of undesired performance and lab-scale production. In this Outlook, the research progress of alkaline membranes in terms of backbone structures, synthesis methods, and related applications is organized and discussed. The evaluation of synthesis methods and description of membrane stability enhancement strategies provide valuable insights for structural design. Finally, to accelerate the deployment of relevant technologies in alkaline media, the future priority of alkaline membranes that needs to be addressed is presented from the perspective of science and engineering.

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“…Recently, poly(arylene alkylene)-based ion-exchange polymers have been widely exploited in electrochemical energy systems owing to their high ionic conductivity, excellent mechanical integrity, and synthetic scalability. − Additionally, the merit of solvent processability enables the application of this type of polymer in MCDI using surface coating techniques. In this work, we fabricated high-capacity porous carbon electrodes by coating poly(arylene alkylene)-based ion-exchange polymer layers.…”

Section: Introductionmentioning

confidence: 99%

Poly(arylene alkylene)-Based Ion-Exchange Polymers for Enhancing Capacitive Desalination Capacity and Electrode Stability

Xu,

Jiang,

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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Poly(arylene alkylene)s with pendent benzyl-tethered ammonium cations for anion exchange membranes

Cited by 25 publications

References 60 publications

Modification of Hydrophobic Diacid Units for Enhanced Poly(crown ether) Anion-Exchange Membrane Performance

Modification of Hydrophobic Diacid Units for Enhanced Poly(crown ether) Anion-Exchange Membrane Performance

Alkaline Membranes toward Electrochemical Energy Devices: Recent Development and Future Perspectives

Poly(arylene alkylene)-Based Ion-Exchange Polymers for Enhancing Capacitive Desalination Capacity and Electrode Stability

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