Elucidation of mass transport and material degradation mechanisms in PEFC by advanced diagnostics using magnetic resonance imaging and laser techniques

在本项目中，通过使用磁共振成像（MRI）和激光技术的先进诊断技术，对聚合物电解质燃料电池（PEFC）中的质量传输和材料降解机制进行了说明。我们开发了一种核标记的MRI技术来研究PEFC中有和没有微孔层的水传输。我们还开发了一套基于臭氧光吸收的PEFC内气体流动行为可视化系统。该系统将臭氧的紫外光吸收特性应用于无粒子风速测量中，捕捉到了光吸收点的移动。在运行的PEFC中，通过多孔气体扩散层实验确定了穿透流。

In this project, elucidation of mass transport and material degradation mechanisms in polymer electrolyte fuel cells (PEFCs) by advanced diagnostics using magnetic resonance imaging (MRI) and laser techniques were performed. We developed an nuclear-labeing MRI technique to investigate water transport with and without micro porous layer in PEFCs. We also developed a visualization system of gas flow behavior in PEFC by optical absorption of Ozone. The system applied ultra violet light absorption that is characteristic of Ozone to unseeded velocity measurement and captured the shift of light absorption point. A penetration flow through porous gas diffusion layer was experimentally identified in an operating PEFC.