The Development and Evaluation of PFSA-Free Polyacrylonitrile-co-Methyl Acrylate (PAN-MA) Nanofiber Membranes for its Potential Application as a Proton Exchange Membrane in Fuel Cells

IF 5.4 3区材料科学 Q2 CHEMISTRY, PHYSICAL ACS Applied Energy Materials Pub Date : 2024-07-01 DOI:10.1002/mame.202400044

Köksal Yeğin Seda, Mualla Öner, Tomas Remis, Martin Tomas, Tomas Kovarik

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Abstract

The significance of hydrogen energy has grown considerably due to climate change and the depletion of fossil fuels. PEM fuel cells are the key hydrogen technologies. Commercial membranes based on perfluorosulfonic acid (PFSA) with a polymer structure containing fluorine are currently available. However, it has been determined that certain perfluorosulfonic acids (PFSAs) are hazardous, persistent, and bioaccumulative. Advancements in hydrogen technology rely on effective, inexpensive, and perfluorocarbon-free membranes, specifically proton exchange membranes (PEMs). In this research, a PFSA-free polyacrylonitrile-co-methyl acrylate (PAN-MA) membrane doped with phosphoric acid is prepared using the electrospinning method and then characterized by SEM, FE-SEM, XRD, FTIR, TGA, DMA, and EIS. The DMA analysis reveals that the storage modulus of the doped membrane increases from 0.98 to 5.66 MPa at 80 °C. The nanofiber composite membrane, with a thickness of 181 µm, exhibits the highest proton conductivity of 0.306 S m⁻¹ at 20 °C, 1.76 times higher than that of the Nafion 212 membrane. The Nafion 212 membrane has an ionic conductivity of 0.173 S m⁻¹ under the same conditions. These results indicate that the prepared nanofiber membranes are promising materials for evaluating fuel cell applications.

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开发和评估不含全氟辛烷磺酸的聚丙烯腈-丙烯酸甲酯（PAN-MA）纳米纤维膜在燃料电池中用作质子交换膜的潜力

由于气候变化和化石燃料的枯竭，氢能的重要性大大增加。PEM 燃料电池是关键的氢能技术。目前市场上有基于含氟聚合物结构的全氟磺酸（PFSA）的商用膜。然而，已确定某些全氟磺酸（PFSA）具有危害性、持久性和生物累积性。氢气技术的进步依赖于有效、廉价且不含全氟碳化物的膜，特别是质子交换膜（PEM）。本研究采用电纺丝法制备了掺杂磷酸的不含全氟辛烷磺酸的聚丙烯腈-丙烯酸甲酯（PAN-MA）膜，并通过扫描电镜、FE-SEM、XRD、傅立叶变换红外光谱、TGA、DMA 和 EIS 对其进行了表征。DMA 分析表明，在 80 °C 时，掺杂膜的存储模量从 0.98 增至 5.66 兆帕。厚度为 181 µm 的纳米纤维复合膜在 20 °C 时的质子传导率最高，达到 0.306 S m-1，是 Nafion 212 膜的 1.76 倍。在相同条件下，Nafion 212 膜的离子电导率为 0.173 S m-1。这些结果表明，制备的纳米纤维膜是评估燃料电池应用的理想材料。

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.