FUEL CELL

摘要

A fuel cell includes a cathode side separator. An oxygen-containing gas flow field is formed on a surface of the cathode side separator. The oxygen-containing gas flow field includes an inlet channel having a plurality of flow grooves connected to the oxygen-containing gas supply passage, an outlet channel having a plurality of flow grooves connected to the oxygen-containing gas discharge passage, and an intermediate channel having flow grooves with both ends connected to the inlet channel and the outlet channel respectively. The flow grooves of the outlet channel are longer than the flow grooves of the inlet channel, and the flow grooves of the outlet channel are narrowed toward the oxygen-containing gas discharge passage.

主权项

1. A fuel cell formed by stacking an electrolyte electrode assembly and a separator in a stacking direction, the eleCttolyte electrode assembly including a cathOde, an anode, and, an electrolyte interposed between the cathode and the anode, an oxygen-containing gas flow field for supplying an oxygen-containing gas along the cathode only in one direction and a fuel gas flow field for supplying a fuel gas along the anode only in another direction opposite to the one direction being formed in the fuel cell, an oxygen-containing gas supply passage and an oxygen-containing gas discharge passage for allowing the oxygen-containing gas to flow in the stacking direction, and a fuel gas supply passage and a fuel gas discharge passage for allowing the fuel gas to flow in the stacking direction being provided in the fuel cell,
wherein the oxygen-containing gas discharge passage, and a pair of the fuel gas supply passages on both sides of the oxygen-containing gas discharge passage are provided at one end and on a surface of the separator; and the fuel gas discharge passage, and a pair of the oxygen-containing gas supply passages on both sides of the fuel gas discharge passage are provided at another end and on the surface of the separator.