Influence of ionomer concentration and membrane thickness on membrane electrode assembly in alkaline fuel cell performance

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-01-07 DOI:10.1002/apj.3024
Nur Ubaidah Saidin, Omar Syah Jehan, Kok Seng Leong, Thye Foo Choo, Wai Yin Wong, Kee Shyuan Loh, Rozan Mohamad Yunus
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Abstract

The alkaline fuel cell is subject to extensive research owing to its fast kinetic response relative to acidic media. However, the efficiency of the catalytic layer at the electrodes depends on the amount and distribution of ionomers present there. It is crucial to have the right ionomer concentration to have the best cell performance. Additionally, the membrane thickness is a significant parameter that affects the system performance in alkaline fuel cells. This research studies the best alkaline fuel cell performance using the membrane electrode assembly preparation parameters. The prepared membrane electrode assembly consists of catalyst layers containing Fumion, a commercial anion exchange ionomer, as a binding agent, sandwiched a Fumasep, a well-known commercial anion exchange membrane. This work elucidates the single-cell alkaline fuel cell performance by quantifying the influence of Fumion concentrations (~20–60 wt.%) within the catalytic layer and Fumasep thicknesses (30, 75 and 130 μm). The best concentration of Fumion was found to be 50 wt.%, culminating in the maximum peak power density of 67 mW cm−2 achieved by the FAA-3-PK-75. Meanwhile, FAA-3-PK-130 exhibited the highest open-circuit potential with lowest power density at 53 mW cm−2. These findings may serve as a valuable guide for membrane electrode assembly preparation in alkaline fuel cells.

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离子膜浓度和膜厚度对碱性燃料电池膜电极组件性能的影响
碱性燃料电池因其相对于酸性介质的快速动力学反应而受到广泛研究。然而,电极催化层的效率取决于离子体的数量和分布。要获得最佳的电池性能,适当的离子膜浓度至关重要。此外,膜厚度也是影响碱性燃料电池系统性能的一个重要参数。这项研究利用膜电极组件的制备参数来研究碱性燃料电池的最佳性能。制备的膜电极组件由催化剂层和 Fumasep(一种著名的商业阴离子交换膜)夹层组成,催化剂层以 Fumion(一种商业阴离子交换离子膜)作为结合剂。这项研究通过量化催化层中富美浓浓度(约 20-60 wt.%)和 Fumasep 厚度(30、75 和 130 μm)的影响,阐明了单细胞碱性燃料电池的性能。发现最佳的富米恩浓度为 50 wt.%,FAA-3-PK-75 的最大峰值功率密度为 67 mW cm-2。同时,FAA-3-PK-130 的开路电位最高,功率密度最低,为 53 mW cm-2。这些发现可为碱性燃料电池中膜电极组件的制备提供有价值的指导。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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