Robust alkaline stability of MOFs functionalized poly (aryl ether ketone) anion exchange membranes for hydrogen fuel cells

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2024-11-12 DOI:10.1016/j.ijhydene.2024.11.104

Xiaodong Li

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Abstract

In this paper, poly (aryl ether ketone sulfone) polymers containing amino groups (Am-PAEKS) was synthesized via a direct polycondensation reaction, and subsequently, imidazole functionalized Am-PAEKS (Im-Am-PAEKS) was prepared by functionalized modification using chlorinated 1-allyl-3-methylimidazole. Meanwhile, cationically modified UiO-66-NH₂ metal-organic frameworks (CA-MOF) were added by cationic modification of D-UiO-66-NH₂, which were introduced into the polymer matrix as filler, composite membranes with different contents of cationic MOFs were prepared. The structures and morphologies of D-UiO-66-NH₂, CA-MOF and the composite membranes were also characterized by ¹H NMR, FT-IR, SEM and EDS. The prepared composite membranes exhibited good ionic conductivity, with a higher ionic conductivity of 0.184 S cm⁻¹ at 80 °C than that of the pure membrane (0.074 S cm⁻¹ at 80 °C). The open-circuit voltage (OCV) and peak power density of the composite membrane were respectively 0.924 V and 69.80 mW cm⁻². Meanwhile, all prepared composite membranes had excellent dimensional stability, with all membranes exhibiting a swelling ratio of less than 12%. These consequences demonstrate the composite membrane prepared in this article has a good application prospect for anion-exchange membrane fields.

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用于氢燃料电池的 MOFs 功能化聚（芳基醚酮）阴离子交换膜的强大碱性稳定性

本文通过直接缩聚反应合成了含氨基基团的聚（芳基醚酮砜）聚合物（Am-PAEKS），随后使用氯化1-烯丙基-3-甲基咪唑进行功能化改性，制备了咪唑功能化Am-PAEKS（Im-Am-PAEKS）。同时，通过对D-UiO-66-NH2进行阳离子改性，加入阳离子改性的UiO-66-NH2金属有机框架（CA-MOF），将其作为填料引入聚合物基体中，制备出不同阳离子MOF含量的复合膜。D-UiO-66-NH2 、CA-MOF 和复合膜的结构和形态也通过 1H NMR、FT-IR、SEM 和 EDS 进行了表征。制备的复合膜具有良好的离子传导性，80 ℃ 时的离子传导性为 0.184 S cm-1，高于纯膜（80 ℃ 时为 0.074 S cm-1）。复合膜的开路电压（OCV）和峰值功率密度分别为 0.924 V 和 69.80 mW cm-2。同时，所有制备的复合膜都具有良好的尺寸稳定性，所有膜的膨胀率均小于 12%。这些结果表明，本文制备的复合膜在阴离子交换膜领域具有良好的应用前景。

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.