Study on the micro-layer on the cathode of Proton Exchange Membrane Fuel Cell

• Main Authors: Lung-Ching Tsai, 蔡龍慶
• Other Authors: Ken-Ming Yin
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/00942090018060549525

碩士 === 元智大學 === 化學工程與材料科學學系 === 95 === Abstract The manufacturing processes and Fluorinated ethylene propylene (FEP) contents of gas diffuser layer (GDL) affect significantly the gas mass transport, ohmic loss and water management within the PEM fuel cells, which in turn, influence the performance of fuel cell. The water management within the fuel cell is considered to be an important issue for a better cell performance. The main focus in this thesis is to study the manufacturing process, the content of the FEP, and carbon loading on the cell performance. These results are useful for choosing the optimal fabricating procedure of the GDL and the proper operating conditions of the PEMFC. The traditional GDL covered with a micro-layer can enhance the capability of water management. When the FEP contents in the GDL are too high, the gas diffusion will be difficult due to a small pore size. On the other hand, when the FEP contents are too low, the water generated in the cathode catalyst layer cannot be removed effectively. The micro-layer with 20% FEP(C:FEP=1:0.25) at carbon loading of 1.5 mg/cm2 shows the best performance in the present study. Keyword：PEMFC, micro-porous layer.