4.7 Article

Effects of fluorinated ethylene propylene contents in a novel gas diffusion layer on cell performance of a proton exchange membrane fuel cell

期刊

INTERNATIONAL JOURNAL OF ENERGY RESEARCH
卷 46, 期 2, 页码 1553-1564

出版社

WILEY
DOI: 10.1002/er.7269

关键词

fluorinated ethylene propylene; gas diffusion layer; micro porous layer; proton exchange membrane fuel cell

资金

  1. Ministry of Science and Technology, Taiwan [MOST 109-2622-E-027-009-CC3]
  2. Featured Areas Research Center Program

向作者/读者索取更多资源

This study focuses on the effects of manufacturing processes and fluorinated ethylene propylene (FEP) content on the performance of proton exchange membrane fuel cells (PEMFC), with findings showing that carbon black types, humidification temperature, and FEP content in carbon paper have significant impacts on the cell performance.
The object of this study is the manufacturing processes and fluorinated ethylene propylene (FEP) contents on the cell performance of the proton exchange membrane fuel cell (PEMFC). These results are useful for optimizing gas diffusion layer (GDL) fabrication processes and the operating conditions of the PEMFC. A traditional GDL with a micro porous layer (MPL) can enhance the water management ability. For the case of the one-stage GDL manufacturing process, carbon paper with an FEP content of 10 wt% has the best fuel cell performance and limiting current density. Besides, in the two-stage GDL fabrication process, when the cathode fuel is air, carbon paper with the same 10 wt% FEP content can delay the occurrence of limiting current density. The types of carbon black have remarkable influences on water management capabilities. It is noted that the XC-72R carbon powder has a relatively appropriate pore volume to have enough water to keep the membrane moist and avoid water flooding. The higher the gas humidification temperature, the faster the electrochemical reaction rate. But when the operating current density is high, it will generate too much water, resulting in water flooding and a decrease in the PEMFC performance. Therefore, when the cathode fuel is air and the inlet humidification temperature is 80 degrees C for the anode and 50 degrees C for the cathode, the limiting current density can be effectively extended to maintain the cell performance.

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