Patent ID: 7632589
Filing Date: 2009-12-15
Classification: H01M,Y02E

Abstract:
1. A fuel-cell stack, comprising: a layer-stacked structure of a first cell and a second cell, wherein each cell includes wherein each gas diffusion layer includes a gas-diffusion-layer base material, wherein (a) the gas-diffusion-layer base material of each anode of the first and second cells comprises a first direction and an elongation such that the gas-diffusion-layer base materials have elongation variations that are different in the anode of the first cell and the anode of the second cell in the first direction, or (b) the gas-diffusion-layer base material of each cathode of the first and second cells comprises a first direction and an elongation such that the gas-diffusion-layer base materials have elongation variations that are different in the cathode of the first cell and the cathode of the second cell in the first direction, wherein the first direction is both (i) parallel to the surfaces having the grooved portions and (ii) perpendicular to a primary direction of flow in the gas flow passages.