JP6862534B2 - Electrochemical cell - Google Patents

Description

The present embodiment relates to an electrochemical cell.

The electrochemical cell functions as a solid oxide fuel cell (SOFC) that extracts the reaction energy of the reducing agent and the oxidizing agent as electricity under high temperature conditions of, for example, 700 to 1000 ° C. On the other hand, when electrolyzing steam or the like, the electrochemical cell obtains hydrogen and oxygen by electrolyzing high-temperature steam through an electrolyte membrane based on the reverse reaction of the reaction in SOFC. It functions as a solid oxide electrolysis cell (SOEC).

The electrochemical cell includes, for example, an electrolytic cell that performs an electrolytic reaction, a current collector that is in contact with the electrolytic cell vertically, a separator that covers the electrolytic cell and the current collector, and a sealing material that prevents leakage from each joint surface. And is configured with. Further, stacking is possible by stacking electrochemical cells. For example, in order to prevent leakage, they are tightened and fixed with bolts or the like at the time of stacking. However, the electrolytic cell is generally a ceramic material, and there is a risk that the electrolytic cell will be deformed due to bending stress or the like due to this tightening and fixing.

Japanese Unexamined Patent Publication No. 2014-41704 Japanese Unexamined Patent Publication No. 2016-126893

An object to be solved by the present invention is to provide an electrochemical cell capable of suppressing deformation of an electrolytic cell.

The electrochemical cell according to the present embodiment is a flat plate-shaped electrolytic cell having at least an electrolyte membrane, an oxygen electrode provided on one surface of the electrolyte membrane, and a hydrogen electrode provided on the other surface of the electrolyte membrane. A holding material having a hardness lower than that of the electrolytic cell, supporting at least a part of the peripheral region of the electrolytic cell and holding the electrolytic cell, and an oxidant gas supplied to the oxygen electrode. A separator that distributes the reducing agent gas supplied to the hydrogen electrode and the separator that supports the electrolytic cell via the holding material and is electrically connected to the oxygen electrode and the hydrogen electrode, respectively. , Equipped with.

The effect of the present invention is that the deformation of the electrolytic cell can be suppressed.

It is a schematic diagram which shows the structure of the electrochemical cell which concerns on 1st Embodiment, the left figure is the figure which shows the constituent members which make up an electrochemical cell, and the right figure is the figure which shows the electrochemical cell which laminated the constituent members. It is a schematic diagram which shows the structure of the unit cell which concerns on 1st Embodiment, the figure on the left is a figure which shows the constituent members which make up a unit cell, and the figure on the right is a figure which shows the unit cell which laminated the constituent members. It is a figure which shows the structure of the unit cell, FIG. 3A is a top view, the right half is a figure excluding the 1st holding material, and the right half of FIG. 3B is AA'. Sectional view. FIG. 6 is an enlarged view showing the configuration shown in the circle frame of FIG. FIG. 5A is a block diagram of the electrochemical cell according to the first embodiment, and FIG. 5A is a top view of the electrochemical cell, which is a second separator, a current collector on the oxygen electrode side, an insulator between the separators, and a first. 4 The figure in a state where the sealing material is removed, FIG. 5 (b) is a cross-sectional view of the electrochemical cell BB'. The inside of the frame of FIG. 5 (b) is enlarged. It is a figure which shows the structure of the unit cell which concerns on 2nd Embodiment, FIG. 7A is a bottom view, and the right half of FIG. 7B is a cross-sectional view taken along the line CC'. FIG. 8A is a sectional view of the electrochemical cell according to the third embodiment, and FIG. 8A is a top view of the electrochemical cell, which is a second separator, a current collector on the oxygen electrode side, an insulator between the separators, and a fourth. It is the figure of the state which removed the sealing material, and FIG. 8 (b) is the cross-sectional view of DD'. FIG. 9 (a) is a top view of the electrochemical cell according to the fourth embodiment, which is a top view of the electrochemical cell, the second separator, the current collector on the oxygen electrode side, the insulator between the separators, and the fourth. A view showing a state in which the sealing material is removed, FIG. 9B is a cross-sectional view taken along the line EE'. It is a figure which shows the structure of a unit cell, FIG. 10A is a bottom view, and FIG. 10B is a sectional view taken along the line FF'.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present embodiment is not limited to the present invention.

(First Embodiment)
The electrochemical cell according to the first embodiment is intended to suppress deformation of the electrolytic cell due to bending stress by supporting the electrolytic cell via a holding material having a hardness lower than that of the electrolytic cell. More details will be given below.

First, the overall configuration of the electrochemical cell 1 according to the present embodiment will be described with reference to FIGS. 1 and 2.

FIG. 1 is a schematic view showing the configuration of the electrochemical cell 1 according to the present embodiment, the left figure is a diagram showing the constituent members constituting the electrochemical cell 1, and the right figure is a diagram in which the constituent members are laminated. It is a figure which shows the electrochemical cell 1. As shown in FIG. 1, the electrochemical cell 1 according to the present embodiment includes a unit cell 100, a first separator 200a, a second separator 200b, a current collector 300 on the hydrogen pole side, and a collector on the oxygen pole side. It is configured to include an electrical material 400. The electrochemical cells 1 according to the present embodiment can be stacked to increase the output. Alternatively, it can be used alone without being laminated.

FIG. 2 is a schematic view showing the configuration of the unit cell 100 according to the first embodiment, the left figure is a diagram showing the constituent members constituting the unit cell 100, and the right figure is a unit in which the constituent members are laminated. It is a figure which shows the cell 100.

As shown in the left figure of FIG. 2, the unit cell 100 according to the first embodiment includes an electrolytic cell 102, a first holding material 104a, a second holding material 104b, a first sealing material 106, and a second seal. It is configured to include a material 108.

That is, the electrochemical cell 1 according to the present embodiment includes the electrolytic cell 102, the first holding material 104a, the second holding material 104b, the first sealing material 106, the second sealing material 108, and the first separator 200a. A second separator 200b, a current collector 300 on the hydrogen electrode side, and a current collector 400 on the oxygen electrode side are provided. The first sealing material 106 may be an insulator, or may be a material having sealing properties and insulating properties.

As shown in FIG. 1 again, the unit cell 100 has, for example, an oxidant gas (O ₂ ) supplied to the oxygen electrode side and a reducing agent gas supplied to the hydrogen electrode side under a high temperature condition of 600 to 1000 ° C. Power is generated using (H _2). The generated power is supplied to an external load. In this way, the unit cell 100 functions as a solid oxide fuel cell (SOFC).
On the other hand, when electrolyzing water vapor or the like, an external power source is connected instead of the external load, and a reverse reaction during power generation proceeds. That is, the unit cell 100 also functions as a solid oxide electrolysis cell (SOEC) based on the reverse reaction of the above-mentioned reaction in SOFC as an operating principle. The unit cell 100 may function only as SOFC or SOEC.

The first separator 200a and the second separator 200b are combined via an insulator and a shielding material, which will be described later, to form a separator 200. Therefore, the first separator 200a and the second separator 200b are in an insulated state. Further, the separator 200 is configured so that the airtightness is maintained by the shielding material and gas is not discharged from other than the hydrogen manipulator-202 and the oxygen manipulator 204. That is, the separator 200 distributes the oxidizing agent gas (O _{2 ) supplied to the oxygen electrode side and the reducing agent gas (H 2} ) supplied to the hydrogen electrode side. For example, the reducing agent gas (H ₂ ) supplied via the hydrogen manipulator 202 is supplied to the hydrogen electrode side of the unit cell 100, and the oxidant gas (O _{2) is supplied via the oxygen manipulator 204.} ) Is supplied to the oxygen electrode side of the unit cell 100.

In the first separator 200a on the hydrogen electrode side, the current collector 300 on the hydrogen electrode side is arranged, and the unit cell 100 is arranged on the current collector 300. Further, the current collector 400 on the oxygen electrode side is arranged on the oxygen electrode side of the unit cell 100, and the second separator 200b is arranged. The material of the separator is not particularly limited, and it is desirable that the separator has conductivity even in the operating temperature range of 600 to 1000 ° C. and has a coefficient of thermal expansion close to that of the unit cell 100.

The current collector 300 on the hydrogen electrode side is, for example, Ni metal or the like, and electrically connects the hydrogen electrode of the unit cell 100 and the first separator 200a. The current collector 400 on the oxygen electrode side is also a metal equivalent to the current collector 300 on the hydrogen electrode side, and electrically connects the oxygen electrode of the unit cell 100 and the second separator 200b.

Returning to FIG. 2 again, the electrolytic cell 102 performs an electrolytic reaction. The electrolytic cell 102 is formed on, for example, an electrolyte membrane, an oxygen electrode provided on one surface of the electrolyte membrane, a hydrogen electrode provided on the other surface of the electrolyte membrane, and a surface of the hydrogen electrode opposite to the electrolyte membrane side. It is provided with a hydrogen polar porous base material provided, and these are laminated. That is, the electrolytic cell 102 according to the present embodiment has a rectangular flat plate shape having at least an electrolyte membrane, an oxygen electrode provided on one surface of the electrolyte membrane, and a hydrogen electrode provided on the other surface of the electrolyte membrane. It is a cell. Further, the size of the oxygen electrode is smaller than that of the electrolyte membrane, and there is a portion not covered with the oxygen electrode on the outer periphery of the electrolyte membrane. The shape of the flat cell is not limited to a rectangle, and may be a round shape or a polygon such as a pentagon.

In the electrolytic cell 102, for example, under high temperature conditions of 600 to 1000 ° C., oxygen is dissociated at the oxygen electrode during power generation to generate oxygen ions. This oxygen ion moves to the hydrogen electrode through the electrolyte membrane, and at the hydrogen electrode, the oxygen ion reacts with hydrogen to generate water. The electrons generated at this time are taken out and consumed by an external load. On the other hand, when electrolyzing water vapor or the like, an external power source is connected instead of the external load, and a reverse reaction during power generation proceeds. That is, the electric power supplied to the electrolytic cell 102 from the external power source decomposes the supplied water vapor (water) into hydrogen and oxygen ions at the hydrogen electrode, and hydrogen is released.

The ends of the first holding material 104a and the second holding material 104b are crimped to form the holding material 104. That is, the holding material 104 has a hardness lower than that of the electrolytic cell 102 and holds the electrolytic cell 102. The first holding material 104a and the second holding material 104b are made of, for example, a metal plate. The first holding material 104a has a first opening 105a. The hydrogen electrode of the electrolytic cell 102 and the current collector 300 (FIG. 1) on the hydrogen electrode side are electrically connected through the first opening 105a. As a result, the hydrogen electrode of the electrolytic cell 102, the current collector 300 on the hydrogen electrode side, and the first separator 200a are electrically connected. On the other hand, the second holding material 104b has a second opening 105b. The oxygen electrode of the electrolytic cell 102 and the current collector 400 (FIG. 1) on the oxygen electrode side are electrically connected through the second opening 105b. As a result, the oxygen electrode of the electrolytic cell 102, the current collector 400 on the oxygen electrode side, and the second separator 200b are electrically connected.

The facing surfaces of the first holding material 104a and the second holding material 104b are flat, sandwiching the upper and lower sides of the electrolytic cell 102, and crimping the ends of the first holding material 104a and the second holding material 104b. It is fixed with.

The first sealing material 106 has an opening 107 and is arranged between the facing surfaces of the first holding material 104a and the second holding material 104b, and seals the peripheral portions of the first holding material 104a and the second holding material 104b. To do. The material of the first sealing material 106 is not particularly limited, but it is desirable that the first sealing material 106 has a high electrical insulating property. The first sealing material 106 is composed of, for example, alumina, zirconia, silica, or at least a material containing these. In the present embodiment, the first sealing material 106 is formed in a rectangular ring shape, but the shape is not limited to this. For example, any other shape may be used as long as it has a shape that seals the peripheral portions of the first holding material 104a and the second holding material 104b. In this way, the peripheral portions of the first holding material 104a and the second holding material 104b are crimped via the first sealing material 106.

As can be seen from these facts, it was decided to provide a first sealing material 106 for stopping the leak at the crimping end portion to perform sealing. This prevents the electrolytic cell 102 from being subjected to excessive compressive stress for sealing, and is a holding material that is more flexible than the electrolytic cell 102 when bending stress is applied to the electrolytic cell 102 due to the influence of non-uniform surface pressure or the like. It is possible to prevent the 104 from being deformed and the electrolytic cell 102 from being deformed.

The second sealing material 108 has an opening 109 and is provided between the oxygen electrode side surface of the electrolytic cell 102 and the holding material 104 in the present embodiment to seal between the oxygen electrode side surface and the holding material 104. To do. The second sealing material 108 is also made of the same material as the first sealing material 106. The second sealing material 108 may also be arranged between the surface of the electrolytic cell 102 on the fuel electrode side and the holding material 104. That is, the second sealing material 108 seals between the surface on the oxygen electrode side and at least one surface on the fuel electrode side and the holding material 104. The second sealing material 108 is also a material equivalent to the first sealing material 106, and is composed of, for example, alumina, zirconia, silica, or a material containing at least these. In the present embodiment, the second sealing material 108 is formed in a rectangular ring shape, but the shape is not limited to this. Any other shape may be used as long as it has a shape that seals between at least one of the oxygen electrode side surface and the fuel electrode side surface and the holding material 104.

3A and 3B are views showing the configuration of the unit cell 100, FIG. 3A is a top view, the right half is a view excluding the first holding material 104a, and FIG. 3B is a right half of FIG. 3B. Is a cross-sectional view taken along the line AA'. As shown in FIG. 3, the electrolytic cell 102 is held by sandwiching at least a part of the peripheral region of the electrolytic cell 102 between the holding materials 104. Further, the crimping end portion has a support portion 1040 on the outer periphery of the side surface of the electrolytic cell 102, and the separators 200a and 200b (FIG. 1) support the support portion 1040. As described above, when the separators 200a and 200b support the holding material 104, the holding material 104 is interposed so that no pressure is directly applied to the electrolytic cell 102.

As can be seen from these, even if pressure is applied between the separators 200a and 200b, the pressure is not directly applied to the electrolytic cell 102. Further, even if stress is applied to the unit cell 100, the holding material 104 having a hardness lower than that of the electrolytic cell 102 intervenes, and damage to the electrolytic cell 102 is suppressed.

4A and 4B are enlarged views of the configuration shown in the round frame of FIG. 3, FIG. 4A is a diagram showing constituent members constituting the unit cell 100, and FIG. 3B is a diagram showing components constituting the unit cell 100. , It is a figure which shows the unit cell 100 after composition. As shown in this figure, the first sealing material 106 and the second sealing material 108 are compressed and seal between the arranged surfaces. This prevents gas containing oxygen gas from flowing into the hydrogen electrode side from the surface on the oxygen electrode side. Similarly, the gas containing hydrogen gas is prevented from flowing into the oxygen electrode side from the surface on the hydrogen electrode side.

The first holding material 104a according to the present embodiment is provided with a step on the lower surface of the first holding material 104a and the lower surface of the support portion 1040, but the present invention is not limited to this, and the lower surface of the first holding material 104a and the support are provided. The lower surface of the portion 1040 may be flush with the lower surface. Further, when a step is provided between the lower surface of the first holding material 104a and the lower surface of the support portion 1040, the upper surface of the second holding material 104b and the upper surface of the support portion 1040 may be configured flush with each other.

FIG. 5 is a block diagram of the electrochemical cell 1 according to the first embodiment, and FIG. 5 (a) is a top view of the electrochemical cell 1, the second separator 200b, the current collector 400 on the oxygen electrode side, and the like. FIG. 5B is a view of the state in which the insulator 114 between the separator and the separator and the fourth sealing material 116 are removed, and FIG. 5B is a cross-sectional view taken along the line BB'of the electrochemical cell 1. As shown in FIG. 5A, the insulator 110 and the third sealing material 112 are arranged on the upper surface of the support portion 1040 (FIG. 4) of the holding material 104.

Further, as shown in FIG. 5B, an insulator 114 and a fourth sealing material 116 are arranged between the first separator 200a and the second separator 200b. Furthermore, the first separator 200a is electrically connected to the hydrogen electrode via the first opening 105a of the first holding material 104a, and the second separator 200b is connected to the hydrogen electrode via the second opening 105b of the second holding material 104b. It is electrically connected to the oxygen electrode.

FIG. 6 is an enlarged view of the inside of the frame of FIG. 5 (b). As shown in FIG. 6, the first separator 200a and the second separator 200b are combined with each other via the insulator 114 and the fourth sealing material 116. Further, the insulator 110 and the sealing material 112 are also arranged between the support portion 1040 of the holding material 104 and the separators 200a and 200b. In this way, the first separator 200a and the second separator 200b are configured to be insulated and to maintain airtightness. In the present embodiment, the insulator 110 and the sealing material 112 are also arranged between the support portion 1040 of the holding material 104 and the separator 200a in order to increase the airtightness and the insulating property, but the present invention is not limited to this. , The insulator 110 and the sealing material 112 between the support portion 1040 and the separator 200a need not be arranged. This is because the airtightness is maintained by the seal material 108, the insulator 110 between the support portion 1040 and the separator 200b, and the seal material 112.

The insulators 110 and 114 are preferably those having high electrical insulation regardless of the material. Examples of the material include alumina, zirconia, silica, and at least a material containing these. Further, the shape is not particularly limited. The density is preferably dense, but may be porous. Further, the same material as the sealing material may be used.

In this way, the electrochemical cell 1 energizes the electrolytic cell 102, the holding material 104 of the thin metal plate that sandwiches the upper and lower parts of the electrolytic cell 102 and is fixed by the crimping end portion where the end portion is crimped, and the electrolytic cell 102. The current collectors 300 and 400, the separators 200a and 200b covering them, the sealing materials 106, 108, 112 and 116 for preventing leaks in various places, and the insulators 110 and 114 for preventing conduction between the separators. It is configured by stacking. The sealing material may be arranged not only between the holding materials 104 and between the holding material 104 and the electrolytic cell 102, but also on the side surface of the electrolytic cell 102. In addition to the sealing material, an insulator may be sandwiched between the holding materials 104a and 104b. The sealing materials 106, 108, 112, and 116 may be made of a material having a sealing property and an insulating property, and similarly, the insulators 110 and 114 may be made of a material having a sealing property and an insulating property. Good.

As described above, according to the present embodiment, the electrochemical cell 1 supports the electrolytic cell 102 via a holding material 104 having a hardness lower than that of the electrolytic cell 102. As a result, even if bending stress is generated in the electrochemical cell 1, the holding material 104 absorbs the stress, so that the deformation of the electrolytic cell 102 can be suppressed.

(Modification example)
In the electrochemical cell 1 according to the first embodiment, the first sealing material 106 is arranged between the facing surfaces of the first holding material 104a and the second holding material 104b, and the surface of the electrolytic cell 102 on the oxygen pole side and the surface on the oxygen pole side of the electrolytic cell 102 and the surface on the oxygen pole side. The second sealing material 108 was arranged between at least one surface of the surface on the fuel electrode side of the electrolytic cell 102 and the holding material 104. In this modification, the difference is that the first sealing material 106 and the second sealing material 108 are used as the sealing adhesive. Since the structure of the electrochemical cell 1 is the same as that of the first embodiment, the description thereof will be omitted.

The seal adhesive is composed of a glass sheet, a ceramic adhesive, or the like. For example, when the electrolytic cell 102 is sandwiched between the holding materials 104, the sealing adhesive can be melted at a high temperature exceeding the glass transition point to bond the first holding material 104a and the second holding material 104b. The seal adhesive may be mixed with a ceramic filler or the like in order to improve the adhesiveness.

According to this modification, the seal adhesive is arranged between the facing surfaces of the first holding material 104a and the second holding material 104b. Thereby, the adhesive force between the first holding material 104a and the second holding material 104b can be improved. Therefore, it becomes possible to more reliably bond the cell holding first holding material 104a and the second holding material 104b, and avoid applying compressive stress to the periphery of the electrolytic cell during the production of the electrochemical cell 1 to electrolyze. The possibility of cell deformation can be reduced.

(Second Embodiment)
The support portion 1040 of the holding material 104 according to the first embodiment is formed in a flat plate shape, whereas the supporting portion 1040 of the holding material 104 according to the second embodiment is formed in a wavy shape.

7A and 7B are views showing the configuration of the unit cell 100 according to the second embodiment, FIG. 7A is a bottom view, and the right half of FIG. 7B is a cross-sectional view taken along the line CC'. is there. The same reference numerals are given to the configurations equivalent to those of the first embodiment, and duplicate description will be omitted.

As shown in FIG. 7, the support portion 1040 of the crimping end portion of the holding material 104 is formed in a wavy shape. That is, the support portion 1040 has a shape of a protrusion pointed toward the hydrogen electrode side. In this way, the longer the path through which the gas passes increases the pressure loss, and the sealing property can be improved. Thereby, it is possible to reduce the required average surface pressure and reduce the possibility that the unit cell 100 is deformed. In the present embodiment, the support portion 1040 has a shape of a protrusion pointed toward the hydrogen electrode side, but the present invention is not limited to this, and the support portion 1040 has a shape of a protrusion pointed toward the oxygen pole side. It may be configured.

According to this embodiment, the sealing material provided between the holding material 104 and the separator is suppressed by the protruding shape of the support portion 1040. As a result, the surface pressure can be locally increased to improve the degree of compression of the sealing material, and the possibility of gas leakage can be further reduced. Further, since the support portion 1040 has a convex shape on the hydrogen electrode side, the possibility of leakage of the hydrogen reducing agent can be further reduced.

(Third Embodiment)
In the first embodiment, the unit cell 100 is arranged on the first separator 200a, but in the present embodiment, the unit cell 100 is arranged on the first separator 200a via the positioning pin 206, which is different. To do.

FIG. 8 is a block diagram of the electrochemical cell 1 according to the third embodiment, and FIG. 8A is a top view of the electrochemical cell 1, the second separator 200b, the current collector 400 on the oxygen electrode side, and the like. It is the figure of the state which removed the insulator 114 and the 4th seal material 116 between the separators, and FIG. 8 (b) is the cross-sectional view of DD'.

The same reference numerals are given to the configurations equivalent to those of the first embodiment, and duplicate description will be omitted. A positioning pin hole 117 for fixing the installation position is provided at the end of the holding material 104. Further, the first separator 200a is provided with a positioning pin 206. That is, the holding material 104 has a positioning pin hole 117 corresponding to the positioning pin 206 at the end.

According to this embodiment, the unit cell 100 is arranged on the first separator 200a via the positioning pin 206. As a result, the position of the unit cell 100 is settled in a fixed position via the positioning pin 206 and the positioning pin hole 117, so that it is possible to prevent non-uniformity of stress due to misalignment, and the unit cell 100 is deformed. Can be prevented.

(Fourth Embodiment)
In the first embodiment, the unit cell 100 is arranged on the first separator 200a, but in the present embodiment, the unit cell 100 is arranged on the first separator 200a via the positioning pedestal 208, which is different. To do.

9 is a block diagram of the electrochemical cell 1 according to the fourth embodiment, and FIG. 9A is a top view of the electrochemical cell 1, the second separator 200b, the current collector 400 on the oxygen electrode side, and the like. It is a figure which shows the state which removed the insulator 114 and the 4th sealing material 116 between the separators, and FIG. 9 (b) is the cross-sectional view of EE'. The same reference numerals are given to the configurations equivalent to those of the first embodiment, and duplicate description will be omitted. A notch 118 for fixing the position is provided at the end of the holding material 104. Further, the first separator 200a is provided with a positioning pedestal 208. That is, the holding material 104 has a notch 118 at the end corresponding to the positioning pedestal 208.

According to this embodiment, the unit cell 100 is arranged on the first separator 200a via the positioning pedestal 208. As a result, the position of the unit cell 100 is settled in a fixed position via the positioning pedestal 208 and the notch 118, so that it is possible to prevent non-uniformity of stress due to misalignment, and the unit cell 100 is deformed. Can be prevented.

(Fifth Embodiment)
In the first embodiment, the second shield material is arranged between the electrolytic cell 102 and the holding material 104, but in the present embodiment, the holding material 104 is further provided with a gas path 122 for gas shielding. Is different.

10A and 10B are views showing the configuration of the unit cell 100, FIG. 10A is a bottom view, and FIG. 10B is a cross-sectional view taken along the line FF'. The same reference numerals are given to the configurations equivalent to those of the first embodiment, and duplicate description will be omitted. As shown in FIG. 10, a gas entry hole 120 is provided on the upstream side of the holding material 104, and a gas path 122 is provided.

According to this embodiment, the holding material 104 is provided with a gas path 122 for gas shielding. As a result, the high-pressure gas on the upstream side is filled in the gap of the unit cell 100 such as between the first holding material 104a and the second holding material 104b, and the low-pressure gas generated in the downstream portion does not easily enter this region. Therefore, it is possible to prevent the leakage of the generated hydrogen gas and oxygen gas.

Claims (7)

An electrolyte membrane, a flat plate-shaped electrolytic cell having at least an oxygen electrode provided on one surface of the electrolyte membrane and a hydrogen electrode provided on the other surface of the electrolyte membrane.
There is a holding material composed of a first holding material having a hardness lower than that of the electrolytic cell and a second holding material having a hardness lower than that of the electrolytic cell, and the planes of the first holding material and the second holding material facing each other. A holding material that sandwiches at least a part of the peripheral region of the electrolytic cell with a surface and is fixed by a crimping end portion in which the ends of the first holding material and the second holding material are crimped.
A first sealing material composed of a material containing at least one of alumina, zirconia, and silica, and provided between the pressure-bonded ends.
A second sealing material provided between at least a part of the peripheral region of the electrolytic cell and the holding material, which is composed of a material containing at least one of the alumina, the zirconia, and the silica. The second sealing material to be made and
A separator that distributes the oxidant gas supplied to the oxygen electrode and the reducing agent gas supplied to the hydrogen electrode, and is above and below the support portion formed on the outer periphery of the side surface of the electrolytic cell at the crimping end portion. A separator that supports the electrolytic cell and is electrically connected to the oxygen electrode and the hydrogen electrode, respectively.
An electrochemical cell equipped with. The first holding material has a first opening, and the second holding material has a second opening.
The electrochemical cell according to claim 1, wherein the separator is electrically connected to the hydrogen electrode through the first opening and electrically connected to the oxygen electrode through the second opening. Provided between the holding material and at least one surface of the one surface and the other surface of the electrolytic cell, and at least one surface of the one surface and the other surface. A second sealing material that seals between the holding materials and
The electrochemical cell according to claim 2. An electrolyte membrane, a flat plate-shaped electrolytic cell having at least an oxygen electrode provided on one surface of the electrolyte membrane and a hydrogen electrode provided on the other surface of the electrolyte membrane.
A holding material having a hardness lower than that of the electrolytic cell, supporting at least a part of the peripheral region of the electrolytic cell, and holding the electrolytic cell.
A separator that distributes the oxidizing agent gas supplied to the oxygen electrode and the reducing agent gas supplied to the hydrogen electrode, supports the electrolytic cell via the holding material, and supports the oxygen electrode and the hydrogen. A separator that is electrically connected to each pole,
With
The holding material has a support portion on the outer periphery of the side surface of the electrolytic cell, and the separator supports the support portion.
The support portion is an electrochemical cell having a pointed protrusion shape on the hydrogen electrode side. The separator has a positioning pin
The electrochemical cell according to any one of claims 1 to 4, wherein the holding material has a pin hole for fitting the positioning pin at an end portion. The separator has a positioning pedestal and
The electrochemical cell according to any one of claims 1 to 4, wherein the holding material has a notch corresponding to the positioning pedestal at an end portion. An electrolyte membrane, a flat plate-shaped electrolytic cell having at least an oxygen electrode provided on one surface of the electrolyte membrane and a hydrogen electrode provided on the other surface of the electrolyte membrane.
A holding material having a hardness lower than that of the electrolytic cell, supporting at least a part of the peripheral region of the electrolytic cell, and holding the electrolytic cell.
A separator that distributes the oxidizing agent gas supplied to the oxygen electrode and the reducing agent gas supplied to the hydrogen electrode, supports the electrolytic cell via the holding material, and supports the oxygen electrode and the hydrogen. A separator that is electrically connected to each pole,
With
An electrochemical cell characterized in that a gas entry hole is provided on the upstream side of the holding material, and a gas path for a gas shield is provided in the holding material.

Images