CN218710898U - Alkaline high-temperature electrolytic tank - Google Patents

Abstract

The utility model provides an alkaline high-temperature electrolytic tank, which comprises a tank body, wherein an electrolysis device is arranged in the tank body; the electrolytic device comprises a plurality of anode plates and a plurality of cathode plates, wherein the anode plates and the cathode plates are arranged at intervals in the length direction of the tank body; the diaphragm is arranged between the adjacent anode plate and the adjacent cathode plate, and two sides of the diaphragm in the length direction of the groove body are respectively tightly attached to the anode plate and the cathode plate; the separator includes a porous support and a liquid electrolyte fixed on the surface and/or inside of the porous support.

Description

Alkaline high-temperature electrolytic tank

Technical Field

The utility model relates to the technical field of electrochemical devices, in particular to an alkaline high-temperature electrolytic tank.

Background

For water electrolysis, there are two main techniques: alkaline water electrolysis (AEL) using an alkaline solution as an electrolyte and performing electrolysis using a porous separator, and Polymer Electrolyte Membrane Electrolysis (PEMEL). In this process, the anode plate reacts, in which hydroxide ions (OH) of the alkaline solution ^- ) Is oxidized to generate oxygen (O) ₂ ) The theoretical standard potential of this reaction was 0.401V. On the other hand, the cathode plate is reacted, wherein water (H) ₂ O) is decomposedTo hydrogen gas (H) ₂ ) And hydroxide ion (OH) ^- ) The theoretical standard potential of this reaction was-0.828V. Thus, the overall reaction proceeds such that water (H) ₂ O) is decomposed to generate hydrogen (H) ₂ ) And oxygen (O) ₂ ) And the theoretical standard potential is 1.229V.

However, alkaline hydrogen production is currently inefficient and highly resistive, and the prior art electrolyzers require 1.229V of applied voltage per unit cell number of water electrolysis, and as the number of unit cells used for water electrolysis increases, power consumption increases correspondingly. Therefore, the cost of electric power for water electrolysis is obviously increased, and therefore, the technical problem to be solved by the technical personnel in the field is that how to provide the alkaline high-temperature electrolytic cell which can effectively reduce the energy consumption for producing hydrogen by alkaline electrolysis and improve the economy of producing green hydrogen by electrolysis.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving one of the technical problems in the related technology to a certain extent at least, and provides an alkaline high-temperature electrolytic tank, the whole electrolytic tank is in an alkaline environment, the working temperature range is 200-600 ℃, and only negative ions move directionally in the electrolytic process, in addition, the diaphragm is combined to be respectively adjacent to an anode plate and a cathode plate in the thickness direction, and the gas mass transfer resistance is small; OH in electrolytic Process ^- Ions directionally pass through the electrolyte in the diaphragm from the cathode plate side to the anode plate side, OH-ions (or OH parts in water molecules) and metal centers of metal aromatic compounds on the surface of the electrode generate affinity and transfer electrons to generate redox reaction, and the electrons are further transferred between the metal aromatic compounds and the surface of the electrode catalytic layer, so that the overall resistance is small, the energy consumption of hydrogen production by alkaline electrolysis can be effectively reduced, and the economy of hydrogen green prepared by electrolysis is improved.

In view of the above, an embodiment of the present invention provides an alkaline high-temperature electrolytic cell, comprising

The electrolytic bath comprises a bath body, wherein an electrolytic device is arranged in the bath body; the electrolysis device comprises a plurality of anode plates and a plurality of cathode plates, wherein the anode plates and the cathode plates are arranged at intervals in the length direction of the tank body;

the diaphragm is arranged between the adjacent anode plate and the adjacent cathode plate, and two sides of the diaphragm in the length direction of the groove body are respectively tightly attached to the anode plate and the cathode plate; the separator includes a porous support and a liquid electrolyte fixed on the surface and/or inside of the porous support.

In some embodiments, the electrolysis cell further comprises a water vapour supply unit for supplying water vapour to the cathode plate end within the cell body.

In some embodiments, the porous support is at least one of a metal oxide aerogel, a carbon aerogel, an organic aerogel, or an organic-inorganic composite aerogel; wherein the metal oxide in the metal oxide aerogel is at least one of zirconia, titania, strontium titanate, lithium titanate, strontium zirconate or lithium zirconate.

In some embodiments, the liquid electrolyte is a molten hydroxide of an alkali metal and/or a hydroxide of an alkaline earth metal; the alkali metal comprises at least one of lithium, sodium or potassium; the alkaline earth metal comprises at least one of magnesium, calcium, strontium or barium.

In some embodiments, the anode plate and the cathode plate are both identically configured, each comprising an electrically conductive active matrix comprising a matrix; and

an electrode extension layer; at least one layer is arranged on at least one side of the conductive active matrix in the thickness direction.

In some embodiments, the electrode extension layer is prepared by dissolving a metal material and an organic matter in an aprotic polar solvent according to a solid mass ratio of 0.5-1% after compounding, and performing at least one of pyrolysis, electrodeposition, sol-gel or painting; the organic matter is an aromatic compound.

In some embodiments, the electrically conductive active matrix further comprises an electrocatalytic layer disposed on a surface of the matrix; the electrocatalytic layer includes at least one metal particle, the metal particles in the electrocatalytic layer being in conformity with the metal in the metal material in the electrode extension layer.

In some embodiments, the metal particles in the electrocatalytic layer comprise at least one of nickel particles, molybdenum particles, cobalt particles, iron particles, chromium particles, manganese particles, or zirconium particles.

In some embodiments, the matrix is a cellular, non-cellular, or reticulated foam matrix.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a high-temperature flue gas bypass system according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of the electrode-separator of fig. 1.

Fig. 3 is a reaction schematic diagram of an anode plate according to an embodiment of the present invention;

FIG. 4 is a reaction schematic diagram of a cathode plate according to an embodiment of the present invention;

FIG. 5 is a block diagram of the connection between the steam supply unit and the cathode plate according to the embodiment of the present invention;

wherein, 11, a substrate; 12. an electrocatalytic layer; 13. an electrode extension layer; 2. a diaphragm; 3. a trough body; 4. an electrolysis device; 5. an anode plate; 6. a cathode plate; 7. a water vapor supply unit.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other technical solutions obtained by the ordinary skilled person in the art all belong to the protection scope of the present invention.

In the embodiment of the present invention, the electrolytic cell is used as an example of the electrolytic hydrogen production apparatus, but the electrolytic hydrogen production apparatus of the present invention is not limited to the electrolytic cell.

The utility model aims to provide an alkaline high-temperature electrolytic cell, wherein the whole electrolytic device 4 is in alkaline environment, the working temperature interval is 200-600 ℃, and only the directional motion of negative ions exists in the electrolytic process of the electrolytic device 4. In addition, the diaphragm 2 is respectively close to the anode plate 5 and the cathode plate 6 in the thickness direction, so that the gas mass transfer resistance is small; OH in electrolytic Process ^- Ions directionally pass through the electrolyte in the diaphragm 2 from the side of the cathode plate 6 to the side of the anode plate 5, OH-ions (or OH parts in water molecules) and metal centers of metal aromatic compounds on the surface of the electrode generate affinity and transfer electrons to generate redox reaction, the electrons are further transferred between the metal aromatic compounds and the surface of the electrode catalytic layer, the overall resistance is small, the energy consumption of hydrogen production by alkaline electrolysis can be effectively reduced, and the economy of preparing green hydrogen by electrolysis is improved. The embodiment of the utility model provides an electrode of electrolysis hydrogen manufacturing adopts foam matrix 11, compounds electro-catalysis layer 12 and forms electrically conductive active matrix 11 on foam matrix 11 to utilize the metal material and organic matter complex conducting molecule as electrode extension layer 13 outside electrically conductive active matrix 11, the big pi key of aromatic ring of rich electron in electrode extension layer 13 combines with electro-catalysis layer 12 surface metal, evenly distributes on electro-catalysis layer 12 surface, can regard as the conduction channel of electron; in the electrolytic process, metal components with partial positive charges in the electrode extension layer 13 can be compounded with active OH-ions in the electrolyte to increase the electron conduction efficiency, increase the reaction area and improve the kinetic efficiency; meanwhile, the diaphragm 2 in the electrolysis device 4 adopts aerogel materials as a porous structure, and rich pore channels of the porous structure provide sufficient storage space for electrolyteAnd conductivity, which contributes to a reduction in ohmic resistance. The aerogel material has good heat resistance and alkali resistance, and the service life is prolonged.

To achieve the above object, according to a first aspect of an embodiment of the present invention, there is provided an apparatus for producing hydrogen by electrolysis, comprising

The electrolytic bath is characterized by comprising a bath body 3, wherein an electrolytic device 4 is arranged in the bath body 3; the electrolysis device 4 comprises a plurality of anode plates 5 and a plurality of cathode plates 6, wherein the anode plates 5 and the cathode plates 6 are arranged at intervals in the length direction of the tank body 3; and

a diaphragm 2 disposed between the electrodes at both ends of the tank 3; the separator 2 includes a porous support and a liquid electrolyte fixed on the surface and/or inside of the porous support; and one side of the electrode close to the diaphragm 2 is an electrode expansion layer 13; the separator 2 is in close proximity to the anode plate 5 on one side and the cathode plate 6 on the other side in its thickness direction.

As shown in fig. 1, the tank 3 may be a rectangular parallelepiped, and the tank 3 is provided with a liquid inlet and a liquid outlet, so that water vapor at 200-600 ℃ enters and exits.

An electrolytic device 4 is arranged in the tank body 3 in the embodiment; the electrolysis device 4 comprises a plurality of anode plates 5 and a plurality of cathode plates 6, wherein the anode plates 5 and the cathode plates 6 are arranged at intervals in the length direction of the tank body 3, a diaphragm 2 is arranged between the anode plates 5 and the cathode plates 6, and two sides of the diaphragm 2 are respectively close to the anode plates 5 and the cathode plates 6, so that gas and ions generated in the electrolysis process are transferred through the diaphragm 2 and the electrodes, the mass transfer resistance is small, the overall resistance is small, the energy consumption of hydrogen production by alkaline electrolysis can be effectively reduced, and the economy of preparing green hydrogen by electrolysis is improved.

Wherein in some embodiments the anode plate 5 and the cathode plate 6 are both identically configured, and each includes an electrically conductive active matrix 11 and an electrode extension layer 13; wherein the conductive active matrix 11 comprises a matrix 11, preferably the matrix 11 of the conductive active matrix 11 is a foam matrix 11 in at least one of a porous plate, a non-porous plate or a net.

Wherein the electrode extension layer 13 is at least one layer arranged on at least one side of the conductive active matrix 11 in the thickness direction; in some embodiments, the electrode extension layer 13 may be provided on one side or both sides in the thickness direction of the conductive active matrix 11, and one, two, or three layers of the electrode extension layer 13 may be provided on one side or both sides in the thickness direction of the conductive active matrix 11.

The following embodiments will be described in detail with reference to the case where the thickness direction of the conductive active matrix 11 coincides with the left-right direction.

Specifically, the conductive active matrix 11 is a porous plate-shaped foam matrix 11 with a certain thickness, has stable size for resisting electrochemical corrosion, and has a left surface and a right surface which are oppositely arranged, and the electrode extension layer 13 can be arranged on the left surface of the conductive active matrix 11 by one layer, two layers or three layers; while the electrode extension layer 13 may be provided as one layer, two layers or three layers on the right surface of the conductive active matrix 11. However, in practical use, when the electrodes are the cathode plate 6 and the anode plate 5, the electrode extension layer 13 is provided only on the surface of the cathode plate 6 opposite to the anode plate 5.

The electrode expansion layer 13 is prepared by compounding a metal material and an organic matter, dissolving the metal material and the organic matter in an aprotic polar solvent according to the mass ratio of 0.5-1% of solid, and performing pyrolysis, electrodeposition, sol-gel or brushing; the organic substance is an aromatic compound.

Specifically, the electrode extension layer 13 is a three-dimensional electrode extension layer 13, the metal material of the electrode extension layer 13 is at least one selected from nickel, molybdenum, cobalt, iron, chromium, manganese, and zirconium, and the formation process of the electrode extension layer 13 is as follows: compounding a metal material and an organic matter to form a metal-organic compound; wherein the organic compound is at least one of aromatic compounds, such as benzene, naphthalene, anthracene, phenanthrene and its derivatives, halogenated aromatic hydrocarbon, aromatic nitro compound, aromatic alcohol, aromatic acid, steroid, etc. In this embodiment, the metal-organic composite is dissolved in an aprotic polar solvent according to a solid mass ratio of 0.5-1%, and is prepared by at least one of pyrolysis, electrodeposition, sol-gel or brushing, wherein the aprotic polar solvent includes one of dimethylformamide (DMF solution), acetone, dimethyl sulfoxide, dimethyl isosorbide and tetrahydrofuran.

In some embodiments, the metal-organic complex is dissolved in the aprotic polar solvent at a solid mass ratio of 0.5 to 1%, wherein the solid mass ratio may be 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, or any range therebetween. In this embodiment, the electrode extension layer 13 is obtained by using a method of forming a coating by painting as an example, and specifically includes: the electrode surface was repeatedly brushed with a DMF solution (solid mass ratio: 0.8%) in which an iron (II) -phthalocyanine (FePc) complex was dissolved, followed by vacuum drying at 50 ℃ for 12 hours.

In some embodiments, the electrically conductive active matrix 11 further comprises an electrocatalytic layer 12 disposed on the surface of the matrix 11; the electrocatalytic layer 12 contains at least one metal particle, and the metal particles in the electrocatalytic layer 12 are consistent with the metal in the metal material in the electrode extension layer 13, for example, when the metal particles in the electrocatalytic layer 12 are selected from nickel particles, the metal material in the electrode extension layer 13 is also nickel, that is, the metal material in the electrode extension layer 13 is consistent with the metal particles in the electrocatalytic layer 12 all the time.

The forming method of the electro-catalytic layer 12 comprises the following steps: nitrate, chloride or sulfate of at least one metal particle selected from nickel particles, molybdenum particles, cobalt particles, iron particles, chromium particles, manganese particles and zirconium particles is prepared into an aqueous solution with the concentration of 0.1-0.3M, and the aqueous solution is prepared by electrodeposition or immersion-pyrolysis, and the specific formula is as follows:

the electrodeposition method comprises the following steps: a conductive active matrix 11 is used as a cathode plate 6, a platinum electrode is used as an anode plate 5, a metal salt aqueous solution (0.2 mol/L, sulfate, nitrate or chloride) is prepared, a certain amount of reducing agent (ascorbic acid, 0.5 g/L), dispersing agent (sodium dodecyl sulfate, 0.1 g/L) and pH buffering agent (boric acid, 10 g/L) are added, and deposition is carried out for 1-2min under certain voltage and current density.

The impregnation-pyrolysis method is: the conductive active matrix 11 is fully immersed in a metal salt solution for 1 to 2 hours, and then heated to 600 to 900 ℃ in a hydrogen/nitrogen atmosphere for reaction for 2 to 3 hours.

The embodiment of the utility model provides an electrode of electrolysis hydrogen manufacturing adopts foam base member 11, and compound electro-catalysis layer 12 forms electrically conductive active matrix 11 on foam base member 11 to utilize metal material and organic matter complex conducting molecule as the catalysis layer outside electrically conductive active matrix 11, the catalysis layer can go deep into in the electrolyte and form crisscross contact surface in the electrolysis process, increases reaction area, improves the dynamics efficiency.

Specifically, as shown in fig. 2, the anode plate 5 or the cathode plate 6 is closely adjacent to the separator 2, and the cathode plate 6 and the anode plate 5 have the same structure. Wherein, in the up-down direction in fig. 1, the diaphragm 2, the three-dimensional electrode expansion layer 13, the electrocatalytic layer 12 and the matrix 11 are arranged in sequence from top to bottom; wherein the electrocatalytic layer 12 is composed of metal particles, the circular shape in the three-dimensional electrode extension layer 13 can be understood as the metal component in the metal-organic composite, the ring shape in the three-dimensional electrode extension layer 13 represents the organic component, the metal component in the three-dimensional electrode extension layer 13 and OH in the membrane 2 ^- Ionic affinity favoring electrons from OH ^- Toward the electrode extension layer 13; the organic component has affinity with the metal particles of the electrocatalytic layer 12, facilitating the transport of electrons from the electrode extension layer 13 to the electrocatalytic layer 12. Overall, the anode plate 5 is from OH ^- Towards the electrocatalytic layer 12. Further, the reaction principle diagrams of the anode plate 5 and the cathode plate 6 are illustrated in fig. 3 and 4, respectively, wherein the reaction principle in the anode plate 5 can be expressed as 4OH ^- ——>O ₂ +2H ₂ O; wherein the reaction principle in the cathode plate 6 can be expressed as 2H ₂ O——>H ₂ +2OH ^- 。

In some embodiments, the porous support is at least one of a metal oxide aerogel, a carbon aerogel, an organic aerogel, or an organic-inorganic composite aerogel; wherein the metal oxide in the metal oxide aerogel is at least one of zirconium oxide, titanium oxide, strontium titanate, lithium titanate, strontium zirconate or lithium zirconate. The membrane 2 in this embodiment uses aerogel material as the porous structure and has a thickness of 300-500 microns, which may be, for example, 300 microns, 350 microns, 400 microns, 450 microns, 500 microns or any range therebetween. The abundant pore channels provide sufficient storage space and conductivity for the electrolyte, and are beneficial to reducing ohmic resistance. In addition, aerogel materials have good heat resistance and alkali resistance, and have improved service life.

In some embodiments, the liquid electrolyte is a molten hydroxide of an alkali metal and/or a hydroxide of an alkaline earth metal; the alkali metal comprises at least one of lithium, sodium or potassium; the alkaline earth metal includes at least one of magnesium, calcium, strontium, or barium. The liquid electrolyte in this embodiment is a molten hydroxide of an alkali metal and/or a molten hydroxide of an alkaline earth metal, so that the whole electrolytic device 4 is in an alkaline environment, the working temperature range of the electrolytic device is 200-600 ℃, and only negative ions move directionally in the electrolytic process of the electrolytic device 4.

Specifically, in this embodiment, the method for fixing the liquid electrolyte on the surface and/or inside the porous support is as follows: the porous support is immersed in the liquid electrolyte for at least 2 hours and infiltrated by capillary action into the surface and/or interior of the porous support. The porous carrier is soaked in the liquid electrolyte, the electrolyte is fixed on the porous carrier to form the diaphragm 2, and the diaphragm 2 is in contact with the surface of an electrode in a non-interval way through the non-interval contact of the diaphragm 2 and the cathode plate 6 and the anode plate 5, namely the diaphragm 2 and the cathode plate 6 can form a three-phase interface of the cathode plate 6 to generate hydrogen and hydroxide ions in the electrolytic process, and the diaphragm 2 and the anode plate 5 can form a three-phase interface of the anode plate 5 to generate oxygen and water vapor in the electrolytic process.

In some embodiments, the apparatus for electrolytically producing hydrogen further includes a water vapor supply unit 7 for supplying water vapor to the end of the cathode plate 6 within the cell body 3.

As shown in fig. 5 in particular, the water vapor supply unit 7 can be understood as an evaporator; the steam supply unit 7 can provide steam for the negative plate 6 end in the tank body 3, so that the device for producing hydrogen by electrolysis utilizes steam electrolysis, the requirement on the source of raw material water can be relaxed, seawater, industrial wastewater and the like are adopted, the hydrogen production cost is reduced, and the generation of bubbles is avoided by steam electrolysis, thereby avoiding the mass transfer conductive resistance generated by the bubbles. The embodiment can improve the electrolysis temperature, reduce the spacing, effectively improve the reaction efficiency and reduce the resistance; meanwhile, high-grade heat energy of the SOEC is not needed, and the waste heat of a factory can be fully utilized.

The preparation method of the alkaline high-temperature electrolytic tank comprises the following steps: the anode plate 5, the cathode plate 6 and the diaphragm 2 are sealed and pressurized; introducing water vapor with the temperature of 200-600 ℃ to both the side of the cathode plate 6 and the side of the anode plate 5, and activating for 0.5-1h under the condition of no power supply to ensure that the electrode extension layer 13 is in good contact with the electrolyte; water vapor with the temperature of 200-600 ℃ enters the side of the cathode plate 6, and hydrogen and hydroxyl ions are generated on the contact surface of the cathode plate 6 and the diaphragm 2; hydrogen is discharged through the exhaust port of the cathode plate 6; the hydroxide ions pass through the separator 2 to the anode plate 5 side, and oxygen and water vapor are generated at the contact surface of the anode plate 5 and the separator 2 and discharged from the exhaust port of the anode plate 5.

The working process of the electrolytic cell in the embodiment of the utility model is as follows:

electrolyzing in a constant current mode under the action of external direct current (1.3-2V) applied by the anode plate 5 and the cathode plate 6; high-temperature water vapor enters the side of the cathode plate 6, and the electrochemical cathode plate 6 is at 100-1000mA/cm ² Hydrogen and hydroxyl are generated at the three-phase interface of the cathode plate 6 (namely the contact surface of the cathode plate 6 and the electrolyte membrane), and the hydrogen passes through the foam cathode plate 6 and is discharged from the exhaust port of the cathode plate 6; the hydroxide ions pass through the electrolyte in the electrolyte membrane to the anode plate 5 side, oxygen and water vapor are generated at the three-phase interface of the anode plate 5 (i.e., the contact surface of the anode plate 5 and the electrolyte membrane), and the oxygen and water vapor mixture is discharged from the exhaust port of the anode plate 5. The working temperature range of the electrolytic cell in the embodiment is wide and is 200-600 ℃, compared with solid oxide type electrolytic hydrogen production, the electrolytic cell has low requirement on heat input, is more friendly to materials, can be applied to a wider application scene, realizes high-temperature alkaline electrolytic hydrogen production reaction, is beneficial to improving hydrogen production thermodynamics and reducing energy consumption.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (7)

1. An alkaline high-temperature electrolytic cell, which is characterized by comprising

The electrolytic bath comprises a bath body, wherein an electrolytic device is arranged in the bath body; the electrolysis device comprises a plurality of anode plates and a plurality of cathode plates, wherein the anode plates and the cathode plates are arranged at intervals in the length direction of the tank body; and

the diaphragm is arranged between the adjacent anode plate and the adjacent cathode plate, and two sides of the diaphragm in the length direction of the groove body are respectively tightly attached to the anode plate and the cathode plate; the separator includes a porous support and a liquid electrolyte fixed on the surface and/or inside of the porous support.

2. The electrolytic cell of claim 1 further comprising a water vapor supply unit that provides water vapor to the cathode plate end within the cell body.

3. The electrolytic cell of claim 1 wherein the liquid electrolyte is used to maintain the electrolyzer in an alkaline environment and there is only directional movement of negative ions during electrolysis of the electrolyzer.

4. The electrolytic cell of claim 3 wherein the anode plate and the cathode plate are all identically disposed and each comprise

An electrically conductive active matrix comprising a matrix; and

an electrode extension layer; at least one layer is arranged on at least one side of the conductive active matrix in the thickness direction.

5. The electrolytic cell of claim 4 wherein the electrode extension acts as an electron conducting pathway with reactive OH species in the electrolyte during electrolysis of the electrolytic device ^- Ion recombination increases electron conduction efficiency.

6. The electrolytic cell of claim 4 wherein the electrically conductive active matrix further comprises an electrocatalytic layer disposed on a surface of the matrix.

7. The cell of claim 4 wherein said matrix is a porous sheet, a non-porous sheet or a reticulated foam matrix.

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