Power generation cell

A power generation cell comprising a membrane electrode assembly, a cathode separator and an anode separator, the membrane electrode assembly including an electrolyte membrane and electrodes arranged on both sides of the electrolyte membrane, the membrane electrode assembly being sandwiched by the cathode separator and the anode separator, wherein

• the cathode separator is made of a thin metal plate formed by press molding to have a wavy cross section,
• the cathode separator comprises:
• a cathode line ridges that protrude from the cathode separator, contact the membrane electrode assembly and extend in a flow direction of an oxygen-containing gas;
• and
• a plurality of cathode flow field grooves that are formed between the cathode line ridges and form an oxygen-containing gas flow field,
• the plurality of cathode flow field grooves has a wavy shape extending along a long-side direction, the wavy shape being defined by a plurality of regularly spaced rounded crests and rounded troughs in the long-side direction,
• the plurality of cathode flow field grooves comprise:
• a first cathode flow field groove that is connected to an oxygen-containing gas inlet and blocked on a downstream side in the flow direction of the oxygen-containing gas;
• and
• a second cathode flow field groove that is connected to an oxygen-containing gas outlet and blocked on an upstream side in the flow direction of the oxygen-containing gas,
• the first cathode flow field groove and the second cathode flow field groove are separated from each other by the cathode line ridges,
• the second flow field groove is arranged adjacent to the first flow field groove in the flow field width direction,
• the oxygen-containing gas outlet is arranged at one end in the flow field width direction, and
• of the second cathode flow field groove, a portion closest to the oxygen-containing gas outlet in the flow direction of the oxygen-containing gas is directed to the one end at which the oxygen-containing gas outlet is arranged in the flow field width direction.