Metal plate, electrochemical element, electrochemical module, electrochemical device, energy system, solid oxide fuel cell, and method for manufacturing metal plate

1. A metal plate comprising;

a thick portion; and

a thin portion that is thinner than the thick portion,

wherein the thin portion is provided with a penetration space passing through the thin portion in a thickness direction, and

wherein the metal plate has a metal plate aspect ratio that is a value obtained by dividing an overall thickness of the metal plate by a minimum inner diameter of the penetration space is 2 or more, the overall thickness of the metal plate being a thickness of the thick portion which is a thickness between a front face and a back face of the metal plate.

2. The metal plate according to claim 1 , further comprising:

a plurality of the thick portions; and

a plurality of the thin portions.

3. The metal plate according to claim 1 , wherein the thin portion is provided with a plurality of the penetration spaces.

4. The metal plate according to claim 1 , wherein an overall thickness of the metal plate is 0.1 mm or more and 1 mm or less.

5. The metal plate according to claim 1 , wherein the metal plate is constituted by a single plate made of metal.

6. The metal plate according to claim 1 , wherein the metal plate is made of a Fe—Cr based alloy.

7. The metal plate according to claim 1 , wherein at least a portion of a surface of the metal plate is covered by a metal oxide film.

8. An electrochemical element in which at least an electrode layer, an electrolyte layer, and a counter electrode layer are provided on/over the metal plate according to claim 1 .

9. An electrochemical module in which a plurality of the electrochemical elements according to claim 8 are arranged in an assembled state.

10. An electrochemical device comprising at least the electrochemical module according to claim 9 and a reformer, and comprising a fuel supply unit that supplies fuel gas containing a reducing component to the electrochemical module.

11. An energy system comprising the electrochemical device according to claim 10 , and waste heat utilization system that reuses heat discharged from the electrochemical device.

12. An electrochemical device comprising at least the electrochemical module according to claim 9 and an inverter that extracts power from the electrochemical module.

13. An energy system comprising the electrochemical device according to claim 12 , and waste heat utilization system that reuses heat discharged from the electrochemical device.

14. A solid oxide fuel cell comprising the electrochemical element according to claim 8 ,

wherein a power generation reaction is caused in the electrochemical element.

15. A method for manufacturing a metal plate, comprising:

a first processing step of forming a thick portion and a thin portion that is thinner than the thick portion in the metal plate; and

a second processing step of providing the thin portion formed in the first processing step with a penetration space passing through the thin portion in a thickness direction, wherein the metal plate has a metal plate aspect ratio that is a value obtained by dividing an overall thickness of the metal plate by a minimum inner diameter of the penetration space is 2 or more, the overall thickness of the metal plate being a thickness of the thick portion which is a thickness between a front face and a back face of the metal plate.

16. The method for manufacturing a metal plate according to claim 15 ,

wherein pressing processing, etching processing, or laser processing is performed in the first processing step, and

pressing processing, etching processing, or laser processing is performed in the second processing step.