Innovative Design and Experimental Studies of Flat Type PEMFC Stack

• Main Authors: Ning-Yih Sheu, 許寧逸
• Other Authors: Shi-Chern Yen
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/90139722687615220481

碩士 === 國立臺灣大學 === 化學工程學研究所 === 88 === A growing number of consumer electronics need small, portable and lightweight power supplies with high power density and energy density. In this study, a novel design of flat type PEMFC stack was fabricated by using acrylic plates instead of stainless end plates and composite graphite gas flow field plates to largely reduce the weight of stacks and their production cost. Furthermore, using conducting pastes to make current collectors instead of copper plates the weight of the stack could be greatly reduced. In this study, the membrane electrode assembly (MEA) was fabricated by using a new catalyst layer process with Pt loading of less than 0.2 mg/cm2. The single cell test performance of MEA with this new process was found to be better than the traditional process and could be comparable to that of electrodes made by E-Tek. Cyclic voltammetry results of the new MEA were obtained and the results was compared with those made by traditional process and E-Tek electrodes. The preliminary experimental results of the flat-type PEMFC stack show that its peak power density is 100 mW/cm2 operated by dry hydrogen and oxygen at ambient pressure and room temperature in order to eliminate the bulky supporting systems such as compressors or humidifiers.