【作者】 孙瑞利； 王素力； 夏章讯； 孙公权；

【Author】 Ruili Sun;Suli Wang;Zhangxun Xia;Gongquan Sun;Dalian Institute of Chemical Physics,Chinese Academy of Sciences;University of Chinese Academy of Sciences;

【机构】 中国科学院大连化学物理研究所； 中国科学院大学；

【摘要】 质子交换膜燃料电池的商业化应用面临性能、寿命、成本等方面挑战。如何制备兼具高性能和高稳定性膜电极成为当前研究热点。传统膜电极将Pt/C催化剂和溶剂均匀混合并涂于质子交换膜或气体扩散层表面制备电极,形成无序气体、电子和质子传输迁移通道造成催化剂利用率低从而引起较大活化损失。本文在有序阵列载体表面采用磁控溅射法制备了有序纳米阵列电极。实验通过聚合温度和基底类型,获得了不同形貌的PANI阵列;通过控制磁控溅射功率、时间、基底温度以及气体流速调控Pt催化剂在PANI有序阵列表面的厚度、晶格以及形貌。初步研究结果表明采用Pt/PANI有序电极组装质子交换膜燃料电池最高功率密度达到346m W cm^-2。更多还原

【Abstract】 Performance, durability and cost are main challenges for the scale commercializing PEMFCs. How to design membrane electrode assemblies（MEAs） with high activity and long-term durability has been the main researching area. Traditional MEAs are fabrication by brushing inks composed of commercial catalysts on the gas diffusion layer or proton exchange membrane, making channels for gases, electrons and protons disordered resulting in high kinetic losses. Here we report a Pt/PANI electrode with ordered Pt catalyst on aligned nanowires by magnetron sputter deposition. The PANI nanowire morphology can vary with altering the polymerization temperature and substrate materials. The thickness, crystalline lattice and morphology of ordered Pt catalyst on vertically aligned nanowires by tuning the sputtering conditions. We can gain the growth mechanism of Pt catalysts along aligned PANI from SEM and TEM images. The highest power density of MEA with Pt/PANI electrode is 346 m W cm^-2.更多还原