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在聚合物电解质燃料电池的3D打印气体扩散层中引导水透

Tim Dörenkamp¹, Ambra Zaccarelli², Felix N Büchi¹

¹PSI Center for Energy and Environmental Sciences, Villigen PSI CH-5232, Switzerland.

ACS applied materials & interfaces

|April 10, 2025

概括

为聚合物电解质燃料电池 (PEFC) 量身定制的气体扩散层 (GDL) 通过创建确定性孔结构来改善水资源管理. 这提高了反应剂的供应和产品的去除,提高了PEFC的性能.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
化学工程是化学工程的重要组成部分.

背景情况:

气体扩散层 (GDL) 中的液态水积累通过堵塞反应物通路来阻碍聚合物电解质燃料电池 (PEFC) 的性能.
优化GDL孔隙结构对于下一代PEFC中有效的反应剂供应和水分去除至关重要.

研究的目的:

调查GDL与定制,确定性孔结构的潜力,以提高PEFC性能.
为了探索通过碳化制造的GDLs3D打印的前体与受控的多孔性.

主要方法:

操作式X射线放射和X射线断层扫描用于追踪三种不同的GDL设计中的水路.
分析重点是工程孔隙空间内的液态水透和运输机制.

主要成果:

设计的GDL具有有效控制液态水透的功能.
观察到水从催化剂层转向蒸汽相运输的转变.
在高度多孔,有序的GDL结构中发现了强大的对流流.

结论:

具有确定性孔结构的3D打印和碳化GDL为先进的PEFC提供了有希望的方法.
工程GDL促进了高效的水资源管理,远离了液态水的阻塞.
优化的孔隙结构增强了水的去除和对流运输,改善了整体的PEFC操作.

关键词:

通过3D打印打印.这是GDL GDL.在PEFC中,PEFC指标是:放射性X射线摄影是一种X射线摄影.射线断层扫描X射线断层扫描水上交通水上交通水上交通水上交通

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