The cover picture shows how casting irregularities, such as air bubbles and cracks, located within a polymer electrolyte membrane (middle) were studied employing two diagnostic techniques. Spatial performance experiments were conducted using a segmented fuel cell system (bottom), and thermal imaging was performed to map hydrogen crossover to the spatial performance results (top). The work assists the decision if certain membrane irregularities can be tolerated or need to be classified as defects. It contributes to the development of threshold detection limits for in‐line quality control diagnostics.

中文翻译：

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盖燃料电池1/020

封面图片显示了如何使用两种诊断技术研究位于高分子电解质膜（中部）内的铸件不规则物，例如气泡和裂纹。使用分段燃料电池系统（底部）进行了空间性能实验，并进行了热成像以将氢交叉映射到空间性能结果（顶部）。这项工作有助于确定某些膜的不规则性是否可以容忍或需要归类为缺陷。它有助于开发用于在线质量控制诊断的阈值检测极限。