Fluorinated Poly(thiophene-based aryl piperidinium) Anion-Exchange Membranes Containing Dual Cation–Dipole Interactions for Alkaline Fuel Cells,ACS Sustainable Chemistry & Engineering

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Fluorinated Poly(thiophene-based aryl piperidinium) Anion-Exchange Membranes Containing Dual Cation–Dipole Interactions for Alkaline Fuel Cells
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2024-05-14 , DOI: 10.1021/acssuschemeng.4c02735
Na Li ₁ , Jian Gao _{1,

2} , Hongzhe Ni _{1,

3} , Jialin Zhao ₄ , Kuirong Feng ₁ , Jingyi Wu ₁ , Yijia Lei _{1,

2} , Yan Wang _{1,

2} , Jiayao Yang ₁ , Shiyao Sun ₄ , Zhe Wang _{3,

4}

Affiliation

At present, in order to expand and extend the application scope of anion-exchange membrane fuel cells (AEMFCs) in response to the global development of green energy, the design and development of anion exchange membranes (AEMs) that combine high electrochemical performance and long life is a matter of great urgency. In this paper, a series of QPTPTMT-x AEMs with different contents of 2,2,2-trifluoro-1-(5-methoxythiophen-2-yl)ethan-1-one (TMTE) were prepared by first synthesizing TMTE monomers and then introducing them into the polyaryl piperidine skeleton via an ultrastrong acid-catalyzed reaction. With the introduction of TMTE monomers, the F atom provides strong hydrophobicity, while the S heteroatom is present to facilitate intermolecular interactions. On the other hand, –CF₃ and O atoms interact together with cations to produce dual cation–dipole interactions. The comprehensive performance of QPTPTMT-x AEMs produces great improvement. Particularly, QPTPTMT-20 AEM with the lowest ion-exchange capacity and swelling ratio achieved the best ionic conductivity of 180.1 mS cm^–1 at 80 °C while possessing a tensile strength of 72 MPa. After immersion in 3 M NaOH for 1080 h, the conductivity retention of the AEMs was still 94.4%. Last, the membranes were prepared into membrane electrode assemblies for single-cell performance testing. The QPTPTMT-20 AEM demonstrated a peak power density of 416 mW cm^–2 at 80 °C.

中文翻译：

用于碱性燃料电池的含有双阳离子-偶极相互作用的氟化聚（噻吩基芳基哌啶）阴离子交换膜

目前，为了扩大和延伸阴离子交换膜燃料电池（AEMFCs）的应用范围，响应全球绿色能源的发展，设计开发兼具高电化学性能和长寿命的阴离子交换膜（AEMs）。生命是一件非常紧迫的事情。本文首先合成TMTE单体，然后通过合成TMTE单体，制备了一系列不同含量2,2,2-三氟-1-(5-甲氧基噻吩-2-基)乙烷-1-酮(TMTE)的QPTPTMT-x AEMs。然后通过超强酸催化反应将它们引入聚芳基哌啶骨架中。随着TMTE单体的引入，F原子提供了强疏水性，而S杂原子的存在促进了分子间相互作用。另一方面，-CF ₃ 和 O 原子与阳离子相互作用，产生双阳离子-偶极相互作用。 QPTPTMT-x AEM的综合性能产生了很大的提高。特别是，具有最低离子交换容量和溶胀比的QPTPTMT-20 AEM在80℃下实现了180.1 mS cm ^–1 的最佳离子电导率，同时具有72 MPa的拉伸强度。在3 M NaOH中浸泡1080小时后，AEM的电导率保留率仍为94.4%。最后，将膜制备成膜电极组件用于单电池性能测试。 QPTPTMT-20 AEM 在 80 °C 时的峰值功率密度为 416 mW cm ^–2 。

更新日期：2024-05-14

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