The impact of graphene-based materials on anion-exchange membrane fuel cells

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends Pub Date : 2025-01-04 DOI:10.1016/j.cartre.2025.100451

Aniket Raut , Haoyan Fang , Yu-Chung Lin , Shi Fu , Md Farabi Rahman , David Sprouster , Likun Wang , Yiwei Fang , Yifan Yin , Devanshi Bhardwaj , Rebecca Isseroff , Tai-De Li , Michael Cuiffo , John C. Douglin , Jaana Lilloja , Kaido Tammeveski , Dario R. Dekel , Miriam Rafailovich

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Abstract

This study addresses the challenges of power output and durability in anion-exchange membrane (AEM) fuel cells (AEMFCs) through the use of graphene-based materials. Graphene oxide (GO) and partially reduced graphene oxide (prGO) with varying degrees of reduction were synthesized and characterized via Raman spectroscopy, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). AEMs were coated with the synthesized graphene materials and tested with Pt catalyst. The addition of GO and prGO with high degrees of reduction improved power output by 12 % and 5 %, respectively, and increased durability by 29 %. Optimal reduction degree of prGO showed significant improvements, enhancing power output by 53 % and doubling membrane life. When FeCo-N-C replaced Pt/C at the cathode, the power enhancement with intermediate prGO was reduced to 16 %, and durability increased by only 13 %, indicating a specific synergy with Pt. X-ray computed tomography (XCT) analysis showed that graphene addition maintained membrane integrity and prevented Pt nucleation within the membrane. However, after 140 h, the membrane interface became rough, causing electrical shorts. It is hypothesized that the hexagonal carbon ring structure of graphene allows OH⁻ migration but blocks larger Pt ions, preventing degradation. Further investigation is needed to understand the significant power enhancement with minimal prGO addition.

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石墨烯基材料对阴离子交换膜燃料电池的影响

本研究通过使用石墨烯基材料解决了阴离子交换膜（AEM）燃料电池（aemfc）的功率输出和耐久性挑战。合成了不同还原程度的氧化石墨烯（GO）和部分还原氧化石墨烯（prGO），并通过拉曼光谱、x射线衍射（XRD）和x射线光电子能谱（XPS）对其进行了表征。将合成的石墨烯材料涂覆在AEMs上，并用Pt催化剂进行测试。添加GO和prGO后，功率输出分别提高了12%和5%，耐久性提高了29%。最优还原度显著提高，输出功率提高53%，膜寿命提高一倍。当fco - n -C在阴极取代Pt/C时，中间prGO的功率增强降低到16%，耐久性仅提高13%，表明与Pt有特定的协同作用。x射线计算机断层扫描（XCT）分析显示，石墨烯的加入保持了膜的完整性，并阻止了膜内Pt的成核。然而，140h后，膜界面变得粗糙，导致电短路。据推测，石墨烯的六方碳环结构允许OH -迁移，但阻挡较大的Pt离子，防止降解。需要进一步的研究来了解在最小的prGO添加下的显著功率增强。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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