Electrochemical Cell

Abstract

To provide an electrochemical cell enabling both improvement in the bond strength between a metal support and an electrochemical cell and in the gas fluidity in a communication hole.SOLUTION: An electrochemical cell 1 comprises a metal support 10, and a cell body 20. The cell body 20 comprises a hydrogen electrode layer 6 covering each of communication holes 11 formed on a first main face 12 of the metal support 10. The hydrogen electrode layer 6 comprises a film shaped section 61 disposed on the first main surface 12, and a plurality of anchors 62 each disposed in the communication hole 11. The communication holes 11 each comprise a narrow section 11a made to have a smaller internal diameter. The anchors 62 each comprise a constriction section 62a formed narrower inside the narrow section 11a. A gas flowing space 40 is formed between the communication hole 11 and a portion of the anchor 62.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to electrochemical cells. [Background technology]

[0002] Patent Document 1 discloses an electrochemical cell (electrolysis cell, fuel cell, or the like) that includes a cell body disposed on a metal support.

[0003] The metal support has a plurality of communication holes formed in a main surface thereof. The cell body is formed on the main surface of the metal support and has a first electrode layer covering the plurality of communication holes, a second electrode layer, and an electrolyte layer disposed between the first electrode layer and the second electrode layer.

[0004] The first electrode layer has a film portion disposed on the main surface of the metal support, and an anchor portion disposed in the communicating hole. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2022-125626 Summary of the Invention [Problem to be solved by the invention]

[0006] In the electrochemical cell described above, by forming a narrowed portion midway through the communicating hole and by constricting the anchor portion inside the narrowed portion, the bonding strength between the metal support and the electrochemical cell can be further improved.

[0007] However, forming a narrowed portion in the communication hole reduces gas flow through the communication hole.

[0008] An object of the present invention is to provide an electrochemical cell that can achieve both improved bonding strength between a metal support and an electrochemical cell and improved gas flow properties in the communication holes. [Means for solving the problem]

[0009] The electrochemical cell according to the present invention comprises a metal support and a cell body. The metal support has a plurality of communication holes formed on a main surface. The cell body has a first electrode layer formed on the main surface and covering the plurality of communication holes, a second electrode layer, and an electrolyte layer disposed between the first electrode layer and the second electrode layer. The first electrode layer has a membrane portion disposed on the main surface and a plurality of anchor portions disposed in the plurality of communication holes. The communication holes have a narrowed portion formed with a small inner diameter. The anchor portions have narrowed constrictions formed inside the narrowed portion. A gas flow space is formed in a portion between the communication holes and the anchor portions. Effect of the Invention

[0010] According to the present invention, it is possible to provide an electrochemical cell that can achieve both improved bonding strength between a metal support and an electrochemical cell and improved gas flow properties in the communication holes. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a plan view of an electrolysis cell according to an embodiment. [Diagram 2] FIG. 2 is a cross-sectional view taken along line AA of FIG. [Diagram 3] FIG. 3 is a partially enlarged view of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] (Electrolysis cell 1) Fig. 1 is a plan view of an electrolysis cell 1 according to an embodiment. Fig. 2 is a cross-sectional view taken along line AA in Fig. 1. The electrolysis cell 1 is an example of the "electrochemical cell" according to the present invention.

[0013] The electrolytic cell 1 is formed in a plate shape extending in the X-axis and Y-axis directions. In this embodiment, the electrolytic cell 1 is formed in a rectangular shape extending in the Y-axis direction when viewed in a plan view from the Z-axis direction perpendicular to the X-axis and Y-axis directions. However, the planar shape of the electrolytic cell 1 is not particularly limited, and may be a polygon other than a rectangle, an ellipse, a circle, or the like. The X-axis and Y-axis directions are each the surface direction of the electrolytic cell 1, and the Z-axis direction is the thickness direction of the electrolytic cell 1.

[0014] As shown in FIG. 2, the electrolysis cell 1 includes a metal support 10, a cell main body 20, and a flow path member 30.

[0015] [Metal support 10] The metal support 10 supports the cell main body 20. The metal support 10 is formed in a plate shape. The metal support 10 may be in the shape of a flat plate or a curved plate.

[0016] The thickness of the metal support 10 is not particularly limited as long as it can maintain the strength of the electrolysis cell 1, and it can be, for example, 0.1 mm or more and 2.0 mm or less.

[0017] As shown in FIG. 2, the metal support 10 has a plurality of communicating holes 11, a first main surface 12 and a second main surface 13.

[0018] Each communication hole 11 penetrates the metal support 10 from the first main surface 12 to the second main surface 13. Each communication hole 11 opens to both the first main surface 12 and the second main surface 13. The opening of each communication hole 11 on the first main surface 12 side is covered by the hydrogen electrode layer 6. The opening of each communication hole 11 on the second main surface 13 side is connected to a flow path 30a described later.

[0019] Each communication hole 11 can be formed by laser processing, chemical processing (eg, etching processing), or the like.

[0020] In this embodiment, each communication hole 11 is formed along the Z-axis direction. A detailed configuration of the communication hole 11 will be described later.

[0021] The first main surface 12 is provided on the opposite side to the second main surface 13. A cell main body 20 is disposed on the first main surface 12. A flow path member 30 is bonded to the second main surface 13.

[0022] The metal support 10 is made of a metal material. For example, the metal support 10 is made of an alloy material containing Cr (chromium). Examples of such metal materials include Fe-Cr alloy steel (stainless steel, etc.) and Ni-Cr alloy steel. The Cr content of the metal support 10 is not particularly limited, but can be set to 4% by mass or more and 30% by mass or less.

[0023] The metal support 10 may contain Ti (titanium) and / or Zr (zirconium). The Ti content in the metal support 10 is not particularly limited, but may be 0.01 mol% or more and 1.0 mol% or less. The Al content in the metal support 10 is not particularly limited, but may be 0.01 mol% or more and 0.4 mol% or less. The metal support 10 may contain Ti as TiO2 (titania) or Zr as ZrO2 (zirconia).

[0024] The metal support 10 may have an oxide film on its surface, which is formed by oxidation of the constituent elements of the metal support 10. A typical example of the oxide film is a chromium oxide film. The chromium oxide film covers at least a portion of the surface of the metal support 10. The chromium oxide film may also cover at least a portion of the inner wall surface of each of the communicating holes 11.

[0025] [Cell body 20] The cell body 20 is disposed on the metal support 10. The cell body 20 is supported by the metal support 10. The cell body 20 has a hydrogen electrode layer 6 (cathode), an electrolyte layer 7, a reaction prevention layer 8, and an oxygen electrode layer 9 (anode).

[0026] The hydrogen electrode layer 6, electrolyte layer 7, reaction prevention layer 8, and oxygen electrode layer 9 are laminated in this order in the Z-axis direction from the metal support 10 side. The hydrogen electrode layer 6, electrolyte layer 7, and oxygen electrode layer 9 are essential components, while the reaction prevention layer 8 is optional.

[0027] [Hydrogen electrode layer 6] The hydrogen electrode layer 6 is an example of a "first electrode layer" according to the present invention. The hydrogen electrode layer 6 is disposed between the metal support 10 and the electrolyte layer 7. The hydrogen electrode layer 6 is formed on a first main surface 12 of the metal support 10. In this embodiment, a portion of the hydrogen electrode layer 6 is disposed inside each of the communication holes 11 of the metal support 10. A detailed configuration of the hydrogen electrode layer 6 will be described later.

[0028] A source gas is supplied to the hydrogen electrode layer 6 through each of the communication holes 11. The source gas contains at least H2O.

[0029] When the raw material gas contains only H2O, the hydrogen electrode layer 6 produces H2 from the raw material gas in accordance with the electrochemical reaction of water electrolysis shown in the following formula (1). Hydrogen electrode layer 6: H2O+2e - →H2+O 2- (1)

[0030] When the raw gas contains CO in addition to H2O, the hydrogen electrode layer 6 converts H2, CO, and O2 from the raw gas in accordance with the electrochemical reactions of co-electrolysis shown in the following formulas (2), (3), and (4). 2- Generate. Hydrogen electrode layer 6: CO2+H2O+4e - →CO+H2+2O 2- (2) Electrochemical reaction of H2O: H2O+2e - →H2+O 2- (3) Electrochemical reaction of CO2: CO2+2e - →CO+O 2- (4)

[0031] The hydrogen electrode layer 6 is a porous body having electronic conductivity. The hydrogen electrode layer 6 contains nickel (Ni) and an oxide ion conductive material.

[0032] Ni acts as an electronic conductor. In the case of co-electrolysis, Ni also acts as a thermal catalyst to promote the thermal reaction between the generated H2 and the CO2 contained in the feed gas, maintaining the appropriate gas composition for methanation and Fischer-Tropsch synthesis.

[0033] Ni exists in the state of nickel oxide (NiO) in an oxidizing atmosphere and in the state of metallic Ni in a reducing atmosphere. The hydrogen electrode layer 6 is exposed to an oxidizing atmosphere while the electrolytic cell 1 is stopped, and is exposed to a reducing atmosphere while the electrolytic cell 1 is in operation and during a reduction treatment carried out before the operation of the electrolytic cell 1. The hydrogen electrode layer 6 expands / contracts in association with the oxidation / reduction of Ni.

[0034] Examples of oxide ion conductive materials that can be used include YSZ, CSZ, ScSZ, GDC, SDC, (La,Sr)(Cr,Mn)O3, (La,Sr)TiO3, Sr2(Fe,Mo)2O6, (La,Sr)VO3, (La,Sr)FeO3, LDC (lanthanum doped ceria), LSGM (lanthanum gallate), and mixed materials of two or more of these.

[0035] The method for forming the hydrogen electrode layer 6 is not particularly limited, and may be a firing method, a spray coating method (such as a thermal spray method, an aerosol deposition method, an aerosol gas deposition method, a powder jet deposition method, a particle jet deposition method, or a cold spray method), a PVD method (such as a sputtering method or a pulsed laser deposition method), or a CVD method.

[0036] [Electrolyte layer 7] The electrolyte layer 7 is disposed between the hydrogen electrode layer 6 and the oxygen electrode layer 9. In this embodiment, the reaction prevention layer 8 is disposed between the electrolyte layer 7 and the oxygen electrode layer 9, so that the electrolyte layer 7 is sandwiched between the hydrogen electrode layer 6 and the reaction prevention layer 8.

[0037] The electrolyte layer 7 covers the hydrogen electrode layer 6 and also covers a region of the first main surface 12 of the metal support 10 that is exposed from the hydrogen electrode layer 6 .

[0038] The electrolyte layer 7 is formed by discharging the O 2- to the oxygen electrode layer 9. The electrolyte layer 7 is made of a dense material having oxide ion conductivity. The electrolyte layer 7 can be made of, for example, YSZ (yttria-stabilized zirconia, e.g., 8YSZ), GDC (gadolinium-doped ceria), ScSZ (scandia-stabilized zirconia), SDC (samarium-doped ceria), LSGM (lanthanum gallate), or the like.

[0039] The porosity of the electrolyte layer 7 is not particularly limited, but may be, for example, 0.1% to 7%. The thickness of the electrolyte layer 7 is not particularly limited, but may be, for example, 1 μm to 100 μm.

[0040] The method for forming the electrolyte layer 7 is not particularly limited, and a baking method, a spray coating method, a PVD method, a CVD method, or the like can be used.

[0041] [Reaction prevention layer 8] The reaction prevention layer 8 is disposed between the electrolyte layer 7 and the oxygen electrode layer 9. The reaction prevention layer 8 is disposed on the opposite side of the electrolyte layer 7 to the hydrogen electrode layer 6. The reaction prevention layer 8 prevents the constituent elements of the electrolyte layer 7 from reacting with the constituent elements of the oxygen electrode layer 9 to form a layer with high electrical resistance.

[0042] The reaction prevention layer 8 is made of an oxide ion conductive material, and may be made of GDC, SDC, or the like.

[0043] The porosity of the reaction prevention layer 8 is not particularly limited, but may be, for example, 0.1% to 50%. The thickness of the reaction prevention layer 8 is not particularly limited, but may be, for example, 1 μm to 50 μm.

[0044] The method for forming the reaction prevention layer 8 is not particularly limited, and a baking method, a spray coating method, a PVD method, a CVD method, or the like can be used.

[0045] [Oxygen electrode layer 9] The oxygen electrode layer 9 is an example of a "second electrode layer" according to the present invention. The oxygen electrode layer 9 is disposed on the opposite side of the hydrogen electrode layer 6 with respect to the electrolyte layer 7. In this embodiment, the reaction prevention layer 8 is disposed between the electrolyte layer 7 and the oxygen electrode layer 9, and therefore the oxygen electrode layer 9 is connected to the reaction prevention layer 8. If the reaction prevention layer 8 is not disposed between the electrolyte layer 7 and the oxygen electrode layer 9, the oxygen electrode layer 9 is connected to the electrolyte layer 7.

[0046] The oxygen electrode layer 9 reacts with O 2 transferred from the hydrogen electrode layer 6 through the electrolyte layer 7 in accordance with the chemical reaction of the following formula (5): 2- produces O2 from Oxygen electrode layer 9:2O 2- →O2+4e - (5)

[0047] The oxygen electrode layer 9 is made of a porous material having oxide ion conductivity and electron conductivity. The oxygen electrode layer 9 can be made of a composite material of one or more of (La,Sr)(Co,Fe)O3, (La,Sr)FeO3, La(Ni,Fe)O3, (La,Sr)CoO3, and (Sm,Sr)CoO3 and an oxide ion conductive material (such as GDC).

[0048] The porosity of the oxygen electrode layer 9 is not particularly limited, but may be, for example, 20% to 60%. The thickness of the oxygen electrode layer 9 is not particularly limited, but may be, for example, 1 μm to 100 μm.

[0049] The method for forming the oxygen electrode layer 9 is not particularly limited, and a baking method, a spray coating method, a PVD method, a CVD method, or the like can be used.

[0050] [Flow path member 30] The flow path member 30 is joined to the second main surface 13 of the metal support 10. The flow path member 30 forms a flow path 30a between itself and the metal support 10. A source gas is supplied to the flow path 30a. The source gas supplied to the flow path 30a is supplied to the hydrogen electrode layer 6 of the cell main body 20 through each communication hole 11 of the metal support 10.

[0051] The flow path member 30 can be made of, for example, an alloy material. The flow path member 30 may be formed of the same material as the metal support 10. In this case, the flow path member 30 may be substantially integral with the metal support 10.

[0052] The flow path member 30 has a frame 31 and an interconnector 32. The frame 31 is an annular member that surrounds the side of the flow path 30a. The frame 31 is joined to the second main surface 13 of the metal support 10. The interconnector 32 is a plate-like member for electrically connecting an external power source or another electrolytic cell to the electrolytic cell 1 in series. The interconnector 32 is joined to the frame 31.

[0053] In this embodiment, the frame 31 and the interconnector 32 are separate members, but the frame 31 and the interconnector 32 may be an integrated member.

[0054] (Configuration of communication hole 11 and hydrogen electrode layer 6) The configuration of the communicating holes 11 in the metal support 10 and the hydrogen electrode layer 6 will be described with reference to the drawings. Fig. 3 is a partially enlarged view of Fig. 2.

[0055] [Configuration of communication hole 11] As shown in FIG. 3, the communication hole 11 of the metal support 10 has a narrowed portion 11a, a first widened portion 11b, and a second widened portion 11c.

[0056] The narrowed portion 11a is disposed between the first widened portion 11b and the second widened portion 11c in the thickness direction of the metal support 10. The narrowed portion 11a is connected to both the first widened portion 11b and the second widened portion 11c.

[0057] The first widened portion 11b is disposed on the electrolyte layer 7 side of the narrowed portion 11a. The first widened portion 11b opens to the first main surface 12. The second widened portion 11c is disposed on the opposite side of the narrowed portion 11a to the electrolyte layer 7. The second widened portion 11c opens to the second main surface 13.

[0058] The communicating hole 11 is formed so that the inner diameter is small at the narrowed portion 11a. Specifically, in the surface direction of the metal support 10, the minimum width of the narrowed portion 11a is smaller than the maximum width of the first widened portion 11b and smaller than the maximum width of the second widened portion 11c. Thus, the communicating hole 11 is partially narrowed at the narrowed portion 11a located midway in the thickness direction.

[0059] The thickness direction of the metal support 10 is a direction perpendicular to the first main surface 12 of the metal support 10. The surface direction of the metal support 10 is a direction perpendicular to the thickness direction of the metal support 10. In this embodiment, the thickness direction of the metal support 10 is approximately parallel to the Z-axis direction, and the surface direction of the metal support 10 is approximately parallel to the Z-axis direction and the Y-axis direction.

[0060] [Configuration of hydrogen electrode layer 6] As shown in Fig. 3, the hydrogen electrode layer 6 has a membrane portion 61 and an anchor portion 62. Although only one anchor portion 62 is shown in Fig. 3, the hydrogen electrode layer 6 has a plurality of anchor portions 62 corresponding to the plurality of communicating holes 11 of the metal support 10, as shown in Fig. 2.

[0061] The film-like portion 61 is disposed on the first main surface 12 of the metal support 10. The film-like portion 61 is formed in a film shape. Film-like means that it is a thin layer covering the first main surface 12. The thickness of the film-like portion 61 is not particularly limited, but can be, for example, 1 μm or more and 100 μm or less. The film-like portion 61 may be partially thin, or may have a uniform thickness overall. The film-like portion 61 may have a multilayer structure consisting of multiple layers with different compositions.

[0062] The anchor portion 62 is disposed in the through hole 11 of the metal support 10. The anchor portion 62 is connected to the film portion 61. The anchor portion 62 may be substantially integral with the film portion 61. The composition of the anchor portion 62 may be the same as the composition of the film portion 61, or may be different from the composition of the film portion 61.

[0063] The anchor portion 62 exerts an anchor effect on the metal support 10 by being engaged with the communication hole 11 of the metal support 10. This makes it possible to improve the joining strength of the cell main body portion 20 to the metal support 10.

[0064] As shown in FIG. 3, the anchor portion 62 has a narrowed portion 62a, a first wide portion 62b, and a second wide portion 62c.

[0065] The constricted portion 62a is disposed inside the narrowed portion 11a of the metal support 10. The constricted portion 62a is disposed between the first wide portion 62b and the second wide portion 62c in the thickness direction of the metal support 10. The constricted portion 62a is connected to each of the first wide portion 62b and the second wide portion 62c. The constricted portion 62a is substantially integral with each of the first wide portion 62b and the second wide portion 62c.

[0066] The first wide portion 62b is disposed inside the first widened portion 11b of the metal support 10. The first wide portion 62b is disposed on the electrolyte layer 7 side of the constricted portion 62a. The first wide portion 62b is connected to the membrane portion 61.

[0067] The second wide portion 62c is disposed inside the second wide portion 11c of the metal support 10. The second wide portion 62c is disposed on the opposite side of the constricted portion 62a to the electrolyte layer 7. The second wide portion 62c has an end surface 62S of the anchor portion 62.

[0068] In this embodiment, the second wide portion 62c is present only in a portion of the second wide portion 11c. That is, the second wide portion 62c does not fill the entire second wide portion 11c. Therefore, the end surface 62S is located inside the second wide portion 11c.

[0069] However, the second wide portion 62c may fill the entire second wide portion 11c, or may further protrude from the second wide portion 11c toward the flow path 30a. In these cases, the end surface 62S is located outside the second wide portion 11c (i.e., within the flow path 30a).

[0070] In this embodiment, the end surface 62S is formed in a curved shape that protrudes toward the flow path 30a, but the shape of the end surface 62S is not particularly limited.

[0071] In the surface direction of the metal support 10, the minimum width of the constricted portion 62a is smaller than the maximum width of the first wide portion 62b and smaller than the maximum width of the second wide portion 62c. Thus, the anchor portion 62 is formed to be partially narrow at the constricted portion 62a located midway in the thickness direction. Therefore, the second wide portion 62c of the anchor portion 62 is engaged with the narrow portion 11a of the metal support 10, thereby further improving the anchor effect of the anchor portion 62 with respect to the metal support 10.

[0072] The boundary between the constricted portion 62a and the first wide portion 62b is defined by a line indicating a width that is 80% of the maximum width of the first wide portion 62b. The boundary between the constricted portion 62a and the second wide portion 62c is defined by a line indicating a width that is 80% of the maximum width of the second wide portion 62c.

[0073] [Gas distribution space 40] A gas flow space 40 is formed between the communication hole 11 and the anchor portion 62. The gas flow space 40 is a gap between the inner surface of the communication hole 11 and the outer surface of the anchor portion 62. The gas flow space 40 is formed only partially between the communication hole 11 and the anchor portion 62. Therefore, where the gas flow space 40 exists, the inner surface of the communication hole 11 is separated from the outer surface of the anchor portion 62, and where the gas flow space 40 does not exist, the inner surface of the communication hole 11 is in contact with the outer surface of the anchor portion 62.

[0074] The gas flow space 40 is used for quickly supplying the raw material gas supplied from the flow passage 30a to the membrane portion 61, or for quickly discharging the generated gas generated in the membrane portion 61 to the flow passage 30a.

[0075] By providing such a gas flow space 40 between the communication hole 11 and the anchor portion 62, it is possible to improve the gas flow in the narrow communication hole 11 at the narrow portion 11a. As a result, it is possible to activate the electrode reaction in the hydrogen electrode layer 6 (particularly, the membrane portion 61).

[0076] 3, the gas flow space 40 is preferably open to an end surface 62S of the anchor portion 62. This allows gas to be quickly supplied and exhausted between the gas flow space 40 and the flow passage 30a.

[0077] 3, the gas flow space 40 is preferably in contact with the membrane portion 61. This allows gas to be quickly supplied and exhausted between the gas flow space 40 and the membrane portion 61. In this case, a part of the gas flow space 40 may extend into the membrane portion 61.

[0078] It is preferable that the gas flow space 40 communicates from the end face 62S of the anchor portion 62 to the membrane portion 61. That is, it is preferable that the end of one gas flow space 40 on the electrolyte layer 7 side contacts the membrane portion 61, and the end of the gas flow space 40 opposite to the electrolyte layer 7 opens to the end face 62S of the anchor portion 62. In the example of FIG. 3, this means that the gas flow space 40 observed as being divided into two is connected at the back side of the paper surface of FIG. 3 or the front side of the paper surface of FIG. 3. This makes it possible to directly connect the flow path 30a and the membrane portion 61 via the gas flow space 40, so that the supply and exhaust of gas between the flow path 30a and the membrane portion 61 can be performed more quickly.

[0079] The three-dimensional shape of the gas flow space 40 can be grasped by observing the cross-section of the hydrogen electrode layer 6 and the metal support 10 while gradually polishing the cut surface.

[0080] 3, the gas flow space 40 preferably extends along the thickness direction of the metal support 10 in a cross section taken along the thickness direction of the metal support 10. This can further improve the gas flow through the communication holes 11.

[0081] (Modification of the embodiment) Although the embodiments of the present invention have been described above, the present invention is not limited to these, and various modifications are possible without departing from the spirit of the present invention.

[0082] [Variation 1] In the above embodiment, the hydrogen electrode layer 6 functions as a cathode and the oxygen electrode layer 9 functions as an anode, but the hydrogen electrode layer 6 may function as an anode and the oxygen electrode layer 9 may function as a cathode. In this case, the constituent materials of the hydrogen electrode layer 6 and the oxygen electrode layer 9 are switched, and a source gas is caused to flow over the outer surface of the hydrogen electrode layer 6.

[0083] [Variation 2] In the above embodiment, the electrolysis cell 1 has been described as an example of an electrochemical cell, but the electrochemical cell is not limited to the electrolysis cell. An electrochemical cell is a general term for an element in which a pair of electrodes are arranged so that an electromotive force is generated from an overall oxidation-reduction reaction in order to convert electrical energy into chemical energy, and an element for converting chemical energy into electrical energy. Therefore, the electrochemical cell includes, for example, a fuel cell that uses oxide ions or protons as a carrier. [Explanation of symbols]

[0084] 1 Electrolysis cell 10 Metal support 11 Communication hole 11a Stenosis 11b First widening section 11c Second widening section 12 First main surface 13 Second main surface 20 Cell body 6 Hydrogen electrode layer 61 Membrane 62 Anchor part 62a Neck 62b First wide section 62c 2nd wide section 62S end face 7 Electrolyte layer 8. Reaction prevention layer 9 Oxygen Polar Layer 30 Flow path member 30a Flow path 40 Gas distribution space

Claims

1. a metal support having a plurality of communicating holes formed on a main surface thereof; a cell main body portion including a first electrode layer formed on the main surface and covering the plurality of communication holes, a second electrode layer, and an electrolyte layer disposed between the first electrode layer and the second electrode layer; Equipped with the first electrode layer has a membrane portion disposed on the main surface and a plurality of anchor portions disposed in the plurality of communicating holes, The communication hole has a narrowed portion formed with a small inner diameter, The anchor portion has a narrowed portion formed on the inside of the narrowed portion, a gas flow space is formed between the communication hole and the anchor portion, The gas flow space communicates from an end face of the anchor portion to the membrane portion. Electrochemical cell.

2. The gas flow space is in contact with the membrane portion.

10. The electrochemical cell of claim 1.

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