期刊
APPLIED THERMAL ENGINEERING
卷 239, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2023.122109
关键词
PEMFC; Gas diffusion layer; Electrospinning technique; Reverse -gradient pore size; Self -humidification
In this study, a reverse-gradient gas diffusion layer (GDL) is fabricated using the electrospinning method to improve the performance of proton exchange membrane fuel cell (PEMFC) systems under nonhumidification conditions. The experimental results show that the reverse-gradient GDL can retain more water and provide a higher power density under low-humidity conditions.
For proton exchange membrane fuel cell (PEMFC) systems, the parasitic power loss can be decreased by removing the external humidifier. However, when the PEMFC system does not have an external humidifier, the maintenance of the PEMFC performance requires the use of gas diffusion layers (GDLs) with a good waterretention capacity. In this study, a reverse-gradient GDL suitable for PEMFC operation under nonhumidification conditions is fabricated using the electrospinning method. The reverse-gradient GDL is characterized by a decrease in the pore size from the catalyst layer to the flow-field plate. The breakthrough pressure and water saturation are tested using custom-made experimental apparatus, and the fluid transport mechanism is theoretically analyzed and simulated at the mesoscale. In addition, the single-fuel cell performance is tested to verify the effectiveness of the designed reverse-gradient structure. The theoretical analyses and mesoscale simulations show that the reverse-gradient GDL can retain more water in the fuel cell than the positive-gradient and uniform GDLs, and the PEMFC performance tests show that the reverse-gradient GDL can improve the water retention capacity and provide a higher power density under low-humidity conditions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据