Cracks in catalyst layers (CLs) serve as gateway for phosphoric acid (PA) leaching. It significantly affects the performance and durability of high temperature polymer electrolyte membrane fuel cells (HT-PEMFCs). Thus it is an important issue to control the cracks formation in CLs. Herein, a simple and effective way has been developed to minimize cracks via introducing carbon nanotubes (CNTs) into CLs. The effects of CNTs on performance and durability of HT-PEMFC have been evaluated. The introduction of CNTs reinforces the structure of CLs with small cracks. It also regulates pore structure of cathode CLs with reduced PA invading and enhancement of mass transfer. The CNTs addition also enhances oxygen reduction reaction kinetics confirmed by the test of half-cell setup. With addition of 2.0 wt% CNTs in the cathode CL, the peak power density of HT-PEMFC is 673 mW cm −2 at H 2 /O 2 and 160 °C, which is 1.5 times higher than that of the cell without CNT...

中文翻译：

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通过抑制催化剂层中裂纹的形成来提高高温聚合物电解质膜燃料电池的性能和耐久性

催化剂层（CL）中的裂纹充当了磷酸（PA）浸出的通道。它显着影响高温聚合物电解质膜燃料电池（HT-PEMFC）的性能和耐久性。因此，控制CL中的裂纹形成是重要的问题。在本文中，已经开发了一种简单有效的方法以通过将碳纳米管（CNT）引入CL来最大程度地减少裂纹。评估了碳纳米管对HT-PEMFC性能和耐久性的影响。碳纳米管的引入加强了带有小裂纹的碳纳米管的结构。它还通过减少PA侵入和增强传质来调节阴极CL的孔结构。碳纳米管的添加还增强了通过半电池设置测试证实的氧还原反应动力学。在阴极CL中添加2.0 wt％的CNT，