聚合物电解质燃料电池三维打印气体扩散层中的导水渗流

IF 8.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Materials & Interfaces Pub Date : 2025-04-10 DOI:10.1021/acsami.5c00770

Tim Dörenkamp, Ambra Zaccarelli, Felix N. Büchi, Thomas J. Schmidt, Jens Eller

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引用次数: 0

摘要

气体扩散层（GDL）中液态水的积累和相应的反应通道堵塞是聚合物电解质燃料电池（PEFC）性能的限制因素。具有确定性孔隙空间的gdl的设计和制造有可能加速下一代PEFC的发展，并优化反应物供应和产物去除之间的平衡。在这项研究中，我们探索了通过3d打印前驱体碳化获得的具有定制孔结构的gdl的潜力。通过使用operando x射线摄影和随后的x射线断层摄影来跟踪水的路径，研究了三种不同的GDL设计。结果证实了设计特征在控制液态水渗透方面的有效性，并揭示了水在高孔有序结构中随强对流流动而从催化剂层界面向气相输送而不是液体输送的趋势。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Guided Water Percolation in 3D-Printed Gas Diffusion Layers for Polymer Electrolyte Fuel Cells

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Guided Water Percolation in 3D-Printed Gas Diffusion Layers for Polymer Electrolyte Fuel Cells

The accumulation of liquid water in the gas diffusion layer (GDL) and associated clogging of the reactant pathways are limiting factors for the performance of polymer electrolyte fuel cells (PEFC). The design and manufacturing of GDLs with a deterministic pore space have the potential to accelerate the development of next-generation PEFC with an optimized balance between reactant supply and product removal. In this study, we explore the potential of GDLs with tailored pore structures obtained from the carbonization of a 3D-printed precursor. Three different GDL designs are investigated by using operando X-ray radiography and subsequent X-ray tomography to track the water pathways. The results confirm the effectiveness of the designed features in terms of controlled liquid water percolation and reveal a trend toward vapor phase transport rather than liquid transport of water away from the catalyst layer interface along with a strong convective flow within the highly porous ordered structures.

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来源期刊

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.