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Effects of the Crown Ether Cavity on the Performance of Anion Exchange Membranes by Jia Hui Chen; Yvonne Shuen Lann Choo; Xi Hao Wang; Ying Jie Liu; Xi Bin Yue; Xue Lang Gao; Wei Ting Gao; Qiu Gen Zhang; Ai Mei Zhu; Qing Lin Liu is a Chemistry article available to read on EtoBox.

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Anion exchange membrane fuel cells (AEMFCs) have emerged as a promising alternative to proton exchange membrane fuel cells (PEMFCs) due to their adaptability to low-cost stack components and non-noble-metals catalysts. However, the poor alkaline resistance and low OH− conductivity of anion exchange membranes (AEMs) have impeded the large-scale implementation of AEMFCs. Herein, the preparation of a new type of AEMs with crown ether macrocycles in their main chains via a one-pot superacid catalyzed reaction was reported. The study aimed to examine the influence of crown ether cavity size on the phase separation structure, ionic conductivity and alkali resistance of anion exchange membranes. Attributed to the self-assembly of crown ethers, the poly (crown ether) (PCE) AEMs with dibenzo-18-crown-6-ether (QAPCE-18-6) exhibit an obvious phase separated structure and a maximum OH− conductivity of 122.5 mS cm−1 at 80 °C (ionic exchange capacity is 1.51 meq g−1). QAPCE-18-6 shows a good alkali resistance with the OH− conductivity retention of 94.5% albeit being treated in a harsh alkali condition. Moreover, the hydrogen/oxygen single cell equipped with QAPCE-18-6 can achieve a peak power de

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Author

Jia Hui Chen; Yvonne Shuen Lann Choo; Xi Hao Wang; Ying Jie Liu; Xi Bin Yue; Xue Lang Gao; Wei Ting Gao; Qiu Gen Zhang; Ai Mei Zhu; Qing Lin Liu

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Chemistry (Physical Sciences)