公开(公告)号：US20110104582A1

公开(公告)日：2011-05-05

申请号：US12734636

申请日：2008-12-11

申请人： Timothy W. Patterson, JR. ,  Gennady Resnick ,  Ryan J. Balliet ,  Nikunj Gupta ,  Cynthia A. York ,  Carl A. Reiser ,  Robert M. Darling ,  Jesse M. Marzullo ,  Jeremy P. Meyers

发明人： Timothy W. Patterson, JR. ,  Gennady Resnick ,  Ryan J. Balliet ,  Nikunj Gupta ,  Cynthia A. York ,  Carl A. Reiser ,  Robert M. Darling ,  Jesse M. Marzullo ,  Jeremy P. Meyers

IPC分类号： H01M8/04 ,  H01M8/24

CPC分类号： H01M8/04253 ,  H01M8/023 ,  H01M8/04149 ,  H01M8/04171 ,  H01M8/04225 ,  H01M8/04291 ,  H01M8/04303 ,  H01M8/241

摘要： A fuel cell stack (31) includes a plurality of fuel cells (9) each having an electrolyte such as a PEM (10), anode and cathode catalyst layers (13, 14), anode and cathode gas diffusion layers (16, 17), and water transport plates (21, 28) adjacent the gas diffusion layers. The cathode diffusion layer of cells near the cathode end (36) of the stack have a high water permeability, such as greater than 3×10−4 g/(Pa s m) at about 80° C. and about 1 atmosphere, whereas the cathode gas diffusion layer in cells near the anode end (35) have water vapor permeance greater than 3×10−4 g/(Pa s m) at about 80° C. and about 1 atmosphere. In one embodiment, the anode gas diffusion layer of cells near the anode end (35) of the stack have a higher liquid water permeability than the anode gas diffusion layer in cells near the cathode end; a second embodiment reverses that relationship.

摘要翻译： 燃料电池堆（31）包括多个具有诸如PEM（10），阳极和阴极催化剂层（13,14），阳极和阴极气体扩散层（16,17）的电解质的燃料电池（9） 和与气体扩散层相邻的水输送板（21,28）。 在堆叠的阴极端（36）附近的电池的阴极扩散层在约80℃和约1个大气压下具有高的透水性，例如大于3×10-4g /（Pa·sm），而 在阳极端（35）附近的电池中的阴极气体扩散层在约80℃和约1个大气压下具有大于3×10-4g /（Pa·sm）的水蒸汽渗透性。 在一个实施例中，在堆叠的阳极端（35）附近的电池的阳极气体扩散层在靠近阴极端的电池中具有比阳极气体扩散层更高的液体水渗透性; 第二个实施例反转了这种关系。

公开(公告)号：US07569297B2

公开(公告)日：2009-08-04

申请号：US11303505

申请日：2005-12-16

申请人： Richard I. Masel ,  Cynthia A. York ,  Piotr Waszczuk ,  Andrzej Wieckowski

发明人： Richard I. Masel ,  Cynthia A. York ,  Piotr Waszczuk ,  Andrzej Wieckowski

IPC分类号： H01M8/10 ,  H01M6/36 ,  H01M8/14 ,  H01M8/08

CPC分类号： H01M8/0271 ,  H01M4/8605 ,  H01M4/881 ,  H01M4/8846 ,  H01M4/8853 ,  H01M4/8896 ,  H01M4/92 ,  H01M4/96 ,  H01M8/04208 ,  H01M8/1004 ,  H01M8/1009

摘要： A membrane electrode assembly for use with a direct organic fuel cell containing a formic acid fuel includes a solid polymer electrolyte having first and second surfaces, an anode on the first surface and a cathode on the second surface and electrically linked to the anode. The solid polymer electrolyte has a thickness t: t ≥ n f ⁢ D f ⁢ C f ⁢ K f ⁢ j f c where Cf is the formic acid fuel concentration over the anode, Df is the effective diffusivity of the fuel in the solid polymer electrolyte, Kf is the equilibrium constant for partition coefficient for the fuel into the solid polymer electrolyte membrane, ℑ is Faraday's constant nf is the number of electrons released when 1 molecule of the fuel is oxidized, and jfc is an empirically determined crossover rate of fuel above which the fuel cell does not operate.

摘要翻译： 与含有甲酸燃料的直接有机燃料电池一起使用的膜电极组件包括具有第一表面和第二表面的固体聚合物电解质，第一表面上的阳极和第二表面上的阴极并且电连接到阳极。 固体聚合物电解质具有厚度t：