公开(公告)号：US06667127B2

公开(公告)日：2003-12-23

申请号：US09951655

申请日：2001-09-13

申请人： Paul D. Beattie ,  David P. Wilkinson ,  Paul Kozak ,  Haijiang Wang ,  Sheilah Neumann ,  John Robert Gordon ,  Kelvin Keen-Ven Fong ,  Sonia Geillis Wong-Cheung ,  Michael Todd Davis ,  Bien Chiem ,  Lynn C. Erickson

发明人： Paul D. Beattie ,  David P. Wilkinson ,  Paul Kozak ,  Haijiang Wang ,  Sheilah Neumann ,  John Robert Gordon ,  Kelvin Keen-Ven Fong ,  Sonia Geillis Wong-Cheung ,  Michael Todd Davis ,  Bien Chiem ,  Lynn C. Erickson

IPC分类号： H01M804

CPC分类号： H01M8/0239 ,  H01M8/0234

摘要： Fluid diffusion layers with favorable mechanical and electrical properties are prepared for fuel cell electrodes by impregnating a porous carbonaceous web with a carbonizable polymer having pyrrolidone functionality and then carbonizing the pyrrolidone polymer. The polymer having pyrrolidone functionality is stabilized against vaporization by use of an oxidization step prior to carbonization. The fluid diffusion layers are particularly suitable for use as gas diffusion layers in solid polymer electrolyte fuel cells.

公开(公告)号：US06713424B2

公开(公告)日：2004-03-30

申请号：US09859130

申请日：2001-05-16

申请人： Jürgen Stumper ,  John Robert Gordon ,  Herwig Robert Haas ,  Kelvin Keen-Ven Fong

发明人： Jürgen Stumper ,  John Robert Gordon ,  Herwig Robert Haas ,  Kelvin Keen-Ven Fong

IPC分类号： H01M488

CPC分类号： H01M4/8807 ,  H01M4/8605 ,  H01M4/8652 ,  H01M4/8896 ,  H01M8/0234 ,  H01M8/0243 ,  H01M8/1007 ,  Y02P70/56 ,  Y10T29/49108 ,  Y10T29/49115 ,  Y10T29/49117 ,  Y10T29/49204

摘要： The present methods make fluid diffusion layers having reduced surface roughness. The methods used for adhering the loading material to the substrate surface can reduce the average surface roughness of the fluid diffusion layers, thereby reducing leaks in and damage to ion exchange membranes. When fluid diffusion layers and electrodes having reduced surface roughness are employed in membrane electrode assemblies, better reliability and performance are obtained. A method of calculating the surface roughness of a fluid diffusion layer may be used.

摘要翻译： 本方法使流体扩散层具有减小的表面粗糙度。 用于将加载材料粘附到基材表面的方法可以降低流体扩散层的平均表面粗糙度，从而减少离子交换膜的泄漏和损坏。 当在膜电极组件中使用具有降低的表面粗糙度的流体扩散层和电极时，获得更好的可靠性和性能。 可以使用计算流体扩散层的表面粗糙度的方法。