Polysulfone-Based Membranes Modified with Ionic Liquids and Silica for Potential Fuel Cell Applications.

IF 3.3 4区工程技术 Q2 CHEMISTRY, PHYSICAL Membranes Pub Date : 2024-12-13 DOI:10.3390/membranes14120270

Emma Fernández-Llamazares, Thi Hai Van Nguyen, Pere Verdugo, Aitor Gual, Diogo M E Garcia, Claudia Delgado Simão, Miriam Díaz de Los Bernardos, Adrianna Nogalska

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Abstract

The urgent need for sustainable, low-emission energy solutions has positioned proton exchange membrane fuel cells (PEMFCs) as a promising technology in clean energy conversion. Polysulfone (PSF) membranes with incorporated ionic liquid (IL) and hydrophobic polydimethylsiloxane-functionalized silica (SiO₂-PDMS) were developed and characterized for their potential application in PEMFCs. Using a phase inversion method, membranes with various combinations of PSFs, SiO₂-PDMS, and 1-butyl-3-methylimidazolium triflate (BMI.TfO) (1-10 wt%) were prepared and characterized to assess their morphology, porosity, wettability, ionic conductivity, and thermal stability. Incorporating IL significantly altered the membrane structure, increasing porosity and surface roughness, while SiO₂-PDMS enhanced IL retention, reducing leakage by up to 32%. Proton conductivity increased by up to 30 times compared to pure PSF, and membranes exhibited high hydrophilicity at optimal IL concentrations. This work highlights the potential of IL and silica-based membranes for practical applications in PEMFCs.

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离子液体和二氧化硅改性聚砜基膜在燃料电池中的潜在应用。

对可持续、低排放能源解决方案的迫切需求使质子交换膜燃料电池（pemfc）成为清洁能源转换领域的一项有前途的技术。研究了离子液体（IL）和疏水聚二甲基硅氧烷功能化二氧化硅（SiO2-PDMS）的聚砜（PSF）膜，并对其在pemfc中的潜在应用进行了表征。采用相转化法，制备了PSFs、SiO2-PDMS和1-丁基-3-甲基咪唑三酸酯（BMI.TfO）（1-10 wt%）不同组合的膜，并对其形貌、孔隙度、润湿性、离子电导率和热稳定性进行了表征。加入IL可以显著改变膜结构，增加孔隙率和表面粗糙度，而SiO2-PDMS可以增强IL的保留，减少高达32%的泄漏。与纯PSF相比，质子电导率增加了30倍，并且在最佳IL浓度下膜表现出高亲水性。这项工作突出了IL和硅基膜在pemfc中实际应用的潜力。

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来源期刊

Membranes Chemical Engineering-Filtration and Separation

CiteScore

6.10

自引率

16.70%

发文量

1071

审稿时长

11 weeks

期刊介绍： Membranes (ISSN 2077-0375) is an international, peer-reviewed open access journal of separation science and technology. It publishes reviews, research articles, communications and technical notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. Full experimental and/or methodical details must be provided.