Solid oxide electrochemical cell and method for producing same

A solid oxide electrochemical cell comprising:

• a solid hydrogen electrode that oxidizes hydrogen into water through a reaction with oxygen ions during power generation;
• a solid electrolyte membrane that is stacked on a first surface of the solid hydrogen electrode and that conducts oxygen ions during power generation;
• and
• a solid oxygen electrode that is stacked on a second surface of the solid electrolyte membrane opposite to a surface thereof in contact with the first surface and that reduces oxygen in air into oxygen ions during power generation,
• wherein the solid hydrogen electrode includes, in the first surface, a plurality of first raised portions raised in a direction toward the solid electrolyte membrane and first intermediate portions each located between two adjacent ones of the plurality of first raised portions,
• the solid electrolyte membrane includes second raised portions stacked on the first raised portions and second intermediate portions stacked on the first intermediate portions,
• the solid oxygen electrode includes third raised portions stacked on the second raised portions and third intermediate portions stacked on the second intermediate portions,
• the first raised portions have a pitch of 70 to 110 μm,
• the second intermediate portions are in contact with the third intermediate portions without a gap therebetween, and
• a thickness of the second raised portions over tops of the first raised portions is smaller than a thickness of the second intermediate portions.