In this study, the carbon fibers treated by three methods were selected as a reinforcement to investigate the influence on the properties of composite bipolar plates. The properties and microstructure of the composite bipolar plate were characterized by the four-point probe, universal test machine, contact angle tester and scanning electron microscopy. The optimum treatment methods and the fiber content were analysed. The results showed that the carbon fibers treated by Fenton reagent for 2 ​h exhibited the best performance, which could improve the electrical conductivity and the flexural strength for composite bipolar plate. Besides, the optimal content content of carbon fibers treated by Fenton reagent was 4%. The maximum power density of the PEMFC with the composite bipolar plates could reach 662.75 ​mW ​cm⁻² in H₂-air conditions. Therefore, the phenolic resin/graphite composite bipolar plate modified by doping carbon fibers was a promising candidate for bipolar plate materials for PEMFC.

在这项研究中，选择了三种方法处理的碳纤维作为增强材料，以研究其对复合双极板性能的影响。通过四点探针，万能试验机，接触角测试仪和扫描电子显微镜对复合双极板的性能和微观结构进行了表征。分析了最佳的处理方法和纤维含量。结果表明，Fenton试剂处理2 h的碳纤维表现出最佳性能，可以提高复合双极板的电导率和抗弯强度。另外，用芬顿试剂处理的碳纤维的最佳含量为4％。带有复合双极板的PEMFC的最大功率密度可以达到662.75 mW cm ^-2在H _2-空气条件下。因此，通过掺杂碳纤维改性的酚醛树脂/石墨复合双极板是用于PEMFC双极板材料的有希望的候选者。