Effects of membrane electrode assembly preparation on the polymer electrolyte membrane fuel cell performance
Effects of membrane electrode assembly preparation on the polymer electrolyte membrane fuel cell performance
复制标题
DOI：
10.1016/j.electacta.2004.07.017
复制
发表时间：
2004-11
影响因子：
6.6
通讯作者：
T. Frey;M. Linardi
中科院分区：
文献类型：
--
作者：
T. Frey;M. Linardi
本文介绍了最近的研究结果，开发一种优化的内部膜电极组件（MEA）的制备技术相结合的催化剂油墨喷涂和组件热压。在该制备技术中仅选择简单的步骤，以简化方法，旨在降低成本。通过单电池H2/O2运行测试，研究了MEA制备工艺参数如电极压制或退火对氢燃料电池性能的影响。比较了东丽纸和碳布作为气体扩散层（GDL）材料，并优化了电极油墨的组成，以获得最有利的燃料电池性能。在阳极和阴极上使用商业E-TEK催化剂，Pt负载量分别为0.4和0.6mg/cm 2。具有最佳性能的MEA在65°C电池温度、80°C阳极加湿、干燥阴极和两个电极上的环境压力下递送约0.58W/cm 2。结果表明，改变电极成分或使用具有相同功能的不同材料（例如不同的GDL）对燃料电池性能的影响比改变之前研究的热压或喷涂条件等制备参数更大。
This paper presents results of recent investigations to develop an optimized in-house membrane electrode assembly (MEA) preparation technique combining catalyst ink spraying and assembly hot pressing. Only easy steps were chosen in this preparation technique in order to simplify the method, aiming at cost reduction. The influence of MEA fabrication parameters like electrode pressing or annealing on the performance of hydrogen fuel cells was studied by single cell measurements with H2/O2operation. Toray paper and carbon cloth as gas diffusion layer (GDL) materials were compared and the composition of electrode inks was optimized with regard to most favorable fuel cell performance. Commercial E-TEK catalyst was used on the anode and cathode with Pt loadings of 0.4 and 0.6mg/cm2, respectively. The MEA with best performance delivered approximately 0.58W/cm2, at 65°C cell temperature, 80°C anode humidification, dry cathode and ambient pressure on both electrodes. The results show, that changing electrode compositions or the use of different materials with same functionality (e.g. different GDLs), have a larger effect on fuel cell performance than changing preparation parameters like hot pressing or spraying conditions, studied in previous work.