In a polymer electrolyte fuel cell (PEFC), we have analyzed the effects of hot press of a gas diffusion layer (GDL) and a membrane electrode assembly (MEA) on each electric generation ratio under 2 mm width rib and flow channel in the cases of paper and cloth type GDLs. MEAs having partial electrode (catalyst layer) only under the rib and that only under the channel are prepared and assembled with GDLs by hot press. In the case of paper type GDL, the hot press is found to improve the cell performance by decreasing the contact resistance under the channel in spite of decrease in current under the rib due to decrease in oxygen transport in supplied air. On the other hand, in the case of cloth type GDL, the hot press does not decrease large contact resistance under the channel. This is likely to be due to the unsticking of the GDL from the MEA under the channel by the pressure of the product water transported from electrode under the rib. Such unsticking possibly comes from the low stiffness of the cloth type GDL.
|Number of pages||6|
|Journal||Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B|
|Publication status||Published - Jan 2009|
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanical Engineering