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Dual-Side-Chain-Grafted Poly(phenylene oxide) Anion Exchange Membranes for Fuel-Cell and Electrodialysis Applications
ACS Sustainable Chemistry & Engineering ( IF 8.4 ) Pub Date : 2021-06-15 , DOI: 10.1021/acssuschemeng.1c02189
Lv Li 1, 2 , Jia-ao Wang 3 , Lingling Ma 1, 2 , Lei Bai 1, 2 , Anran Zhang 1, 2 , Naeem Akhtar Qaisrani 4 , Xiaoming Yan 1, 2 , Fengxiang Zhang 1, 2 , Gaohong He 1, 2
Affiliation  

Anion exchange membranes (AEMs) usually suffer from the “trade-off” between ion conduction and stability. In this work, a series of dual-side-chain-grafted poly(phenylene oxide) AEMs were synthesized to explore how the side-chain architectures influence membrane performance. Our investigations suggest that the AEM containing both a long hydrophobic extender (attached to the cation’s central atom) and a hydrophilic additional side chain (beside the cation) show high hydroxide conductivity (21.3 mS/cm at 30 °C) and good chemical and dimensional stability (90.5% conductivity retention after 1 M NaOH treatment at 60 °C for 528 h). In addition, when a tri-cation side chain and a hydrophobic side chain are incorporated simultaneously, the resulting AEM shows further improved conductivity and stability (50.0 mS/cm at 30 °C; 90.6% conductivity retention after 1 M NaOH treatment at 60 °C for 528 h); it also shows excellent electrochemical performance when applied in a fuel cell and an electrodialyzer, accomplishing a peak power density of 506 mW/cm2 and a current efficiency of 96.11%, respectively. Our side-chain manipulation strategy provides a new and effective pathway to balance the ionic conductivity and stability of AEMs.

中文翻译:

用于燃料电池和电渗析应用的双侧链接枝聚苯醚阴离子交换膜

阴离子交换膜 (AEM) 通常在离子传导性和稳定性之间进行“权衡”。在这项工作中,合成了一系列双侧链接枝聚苯醚 AEM,以探索侧链结构如何影响膜性能。我们的研究表明,包含长疏水性扩展剂(连接到阳离子的中心原子)和亲水性附加侧链(在阳离子旁边)的 AEM 显示出高氢氧化物电导率(30°C 时为 21.3 mS/cm)以及良好的化学和尺寸稳定性(1 M NaOH 在 60 °C 下处理 528 小时后保持 90.5% 的电导率)。此外,当同时引入三阳离子侧链和疏水侧链时,所得 AEM 显示出进一步提高的导电性和稳定性(30°C 时为 50.0 mS/cm;90. 1 M NaOH 在 60 °C 下处理 528 h 后保持 6% 的电导率);当应用于燃料电池和电渗析器时,它还表现出优异的电化学性能,达到 506 mW/cm2 的峰值功率密度2和电流效率分别为 96.11%。我们的侧链操作策略提供了一种新的有效途径来平衡 AEM 的离子电导率和稳定性。
更新日期:2021-06-28
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