Patent ID: 9281534
Filing Date: 2016-03-08
CPC Classification: H01M,Y02E,Y02T

Claim Text:
1. A fuel cell comprising: a stacked body of a membrane electrode assembly including anode and cathode electrode layers on both surfaces of an electrolyte membrane, and of separators, wherein the membrane electrode assembly and the separators are formed into a substantially rectangular shape, each of the electrode layers comprises a gas diffusion layer and a catalyst layer, each of the separators or the gas diffusion layer includes flow passages, an aspect ratio R as a ratio (length of side parallel to flow passage direction/length of side perpendicular to flow passage direction) of a length of a side parallel to a flow passage direction with respect to a length of a side perpendicular to the flow passage direction on a cathode-side or anode-side catalyst layer coating surface of the electrode layer is 0.01 or more to less than 0.6, in the membrane electrode assembly, on one of outer circumferential portions of two opposed sides perpendicular to the flow passage direction, two or more oxidant gas introduction manifolds for introducing oxidant gas or two or more fuel gas introduction manifolds for introducing fuel gas are arranged, and on other of the outer circumferential portions of the two opposed sides, two or more oxidant gas discharge manifolds for discharging the oxidant gas introduced from the oxidant gas introduction manifolds or two or more fuel gas discharge manifolds for discharging the fuel gas introduced from the fuel gas introduction manifolds are arranged, and a horizontal direction equivalent diameter D (mm) of the flow passages satisfies Expression (1): where Acat is an area (cm