Ethanol dimethyl ammonium functionalized poly[ethylene pyrrole/ethylene ketone/propylene ketone] anion exchange membranes for alkaline electrochemical devices

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY Electrochimica Acta Pub Date : 2024-10-31 DOI:10.1016/j.electacta.2024.145298

Afaaf Rahat Alvi, Keti Vezzù, Paolo Sgarbossa, Gioele Pagot, Angeloclaudio Nale, Vito Di Noto

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Abstract

This study reports the synthesis of new anion exchange membranes (AEMs) based on poly[N-{N′-(2′-hydroxyethyl)-N′,N′-dimethylammoniumethyl}-ethylenepyrrole(X)/(ethyleneketone)/ (propyleneketone)] (E-FPKK_f(X)_g) with X = I⁻ or OH⁻, obtained by modulating the degree of functionalization (f). The synthesis of these AEMs involves the reaction of poly[ethylene ketone/propylene ketone] with 2-(2-aminoethylamino)ethanol using a Paal-Knorr chemistry. The physical-chemical characteristics of these membranes are extensively analyzed by elemental analysis (CHNS/O), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), high resolution thermogravimetric analysis (HR-TGA) and modulated differential scanning calorimetry (MDSC). The electrical behavior is examined using broadband electric spectroscopy (BES), demonstrating conductivities of 1.66 and 0.084 mS cm⁻¹ 30 °C for the membranes in the hydroxide and iodide form, respectively. Additionally, the stability tests conducted by immersing the membranes in 1 M KOH solution at ambient temperature for 336 h reveal promising chemical resistance in alkaline conditions for the membranes in hydroxide form.

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用于碱性电化学设备的乙醇二甲基铵功能化聚[乙烯吡咯/乙烯酮/丙烯酮]阴离子交换膜

本研究报告了基于聚[N-{N՛-(2՛-羟乙基)-N՛,N՛-二甲基乙基铵}-乙烯吡咯(X)/(乙烯酮)/(丙烯酮)](E-FPKKf(X)g)的新型阴离子交换膜（AEM）的合成，其中 X = I- 或 OH-，可通过调节官能化程度 (f) 而获得。这些 AEM 的合成过程是利用 Paal-Knorr 化学反应法，将聚[乙酮/丙酮]与 2-（2-氨基乙基氨基）乙醇进行反应。通过元素分析（CHNS/O）、衰减全反射傅立叶变换红外光谱（ATR-FTIR）、高分辨率热重分析（HR-TGA）和调制差示扫描量热法（MDSC）对这些膜的物理化学特性进行了广泛分析。使用宽带电光谱（BES）对电学行为进行了检测，结果表明氢氧化物和碘化物形态的膜在 30 °C 时的电导率分别为 1.66 和 0.084 mS cm-1。此外，通过在环境温度下将膜浸入 1 M KOH 溶液中 336 小时进行的稳定性测试表明，氢氧化物形态的膜在碱性条件下具有良好的耐化学腐蚀性。

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来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.