This article reports on a flexible polymer electrolyte membrane fuel cell (PEMFC) with a pre-bent flow field. The performances in the flat and bent positions were lower and higher, respectively than that of the traditional flexible fuel cells. The low performance in the flat position was attributed to the void space induced incomplete contact at the interface of the membrane electrode assembly (MEA) and flow-field plates, which resulted in poor performance due to the high ohmic resistance (5.85 Ω cm²) and faradaic resistance (4.17 Ω cm²). However, when bending stress was applied to the MEA, a decreased ohmic resistance (0.954 Ω cm²), faradaic resistance (0.737 Ω cm²), and an enhanced power density (88.7 mW/cm²) were observed because of the improved interfacial contact property between the MEA and the flow-field plates from the increased compressive stress. These experimental results were further analyzed and visualized with aid of the finite element analysis. Despite the relatively low performance in the flat shape, the proposed pre-bent design of the flexible PEMFC possesses promising applicability especially in flexible electronics where the curved shapes are highly required.

本文报道了一种具有预弯曲流场的柔性聚合物电解质膜燃料电池（PEMFC）。在平坦和弯曲位置的性能分别比传统柔性燃料电池低和高。扁平位置的性能低归因于空隙引起的膜电极组件（MEA）与流场板的界面不完全接触，由于高欧姆电阻（5.85Ωcm ²）而导致性能不佳和法拉第电阻（4.17Ωcm ²）。然而，当弯曲应力被施加到MEA，减小的欧姆电阻（Ω0.954厘米²），法拉第电阻（Ω0.737厘米²），和增强的功率密度（88.7毫瓦/厘米²观察到）是由于增加的压应力改善了MEA和流场板之间的界面接触性能。这些实验结果通过有限元分析进一步分析和可视化。尽管在扁平形状中的性能相对较低，但所提出的柔性PEMFC的预弯曲设计仍具有广阔的应用前景，尤其是在对弯曲形状要求很高的柔性电子产品中。