公开(公告)号：EP1403947A2

公开(公告)日：2004-03-31

申请号：EP03018056.6

申请日：2003-08-07

申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

发明人： Shibata, Soichi ,  Kusakabe, Hiroki ,  Hatoh, Kazuhito ,  Hase, Nabuhiro ,  Takeguchi, Shinsuke ,  Ohara, Hideo ,  Matsumoto, Toshihiro ,  Kokawa, Katsuzou ,  Urata, Takayuki

IPC分类号： H01M4/86 ,  H01M8/10

CPC分类号： H01M8/026 ,  H01M4/8605 ,  H01M8/0232 ,  H01M8/0234 ,  H01M8/0245 ,  H01M8/1007

摘要： A fuel cell having high operation performance and reliability is provided by optimizing the shape and properties of a gas diffusion layer and the dimensions of a gas flow channel. The fuel cell is capable of evenly supplying a reaction gas to the catalyst of a catalyst layer and promptly discharging excessive water generated therein. The gas diffusion layer of the MEA of this fuel cell comprises a first section having a surface A that comes in direct contact with a separator plate and a second section having a surface B that faces the gas flow channel of the separator plate. The porosity of the first section is lower than the porosity of the second section, and the second section protrudes into the gas flow channel. The gas flow channel has sufficient width and depth for the protrusion of the gas diffusion layer, and the width of a rib formed by the gas flow channel is sufficiently narrow.

摘要翻译： 通过优化气体扩散层的形状和性质以及气体流动通道的尺寸来提供具有高操作性能和可靠性的燃料电池。 燃料电池能够将反应气体均匀地供给至催化剂层的催化剂，并迅速排出其中产生的过量的水。 该燃料电池MEA的气体扩散层包括具有与隔板直接接触的表面A的第一部分和具有面向隔板的气体流动通道的表面B的第二部分。 第一部分的孔隙率低于第二部分的孔隙率，并且第二部分突出到气体流动通道中。 气体流路具有足够的宽度和深度以用于气体扩散层的突出，并且由气体流路形成的肋的宽度足够窄。