Electrolyte flow cell plate and electrochemical synthesis ammonia electrolysis device

Abstract

The invention discloses an electrolyte flow cell plate and an electrochemical synthesis ammonia electrolysis device, and belongs to the field of electrolysis ammonia production. A first gas inlet and outlet area and a second gas inlet and outlet area are arranged at the two ends of a plate body of the electrolyte flow cell plate in the first direction respectively, an electrolyte flow field area is located in the center area of the plate body, n flow field ridges divide the electrolyte flow field area into n + 1 electrolyte flow channels, and reinforcing ribs are connected between every two adjacent flow field ridges. The thickness of the reinforcing rib is smaller than that of the flow field ridge strip, and a hollow area is formed in an area which is not covered by the flow field ridge strip and the reinforcing rib; a first electrolyte inlet and outlet area and a second electrolyte inlet and outlet area are arranged at the two ends, in the second direction, of the plate body respectively. The electrolyte flow cell plate is reasonable in structural division, gas-liquid ordered separation and contact are realized, and a basis is provided for efficient reaction; the reinforcing ribs enhance the non-deformability of the flow field ridges, improve the aperture ratio, reduce the flow resistance of electrolyte, have an active shunting effect, and improve the uniformity of concentration distribution of reactants on the surface of the electrode.

Description

Technical Field

[0001] This invention relates to the field of ammonia production equipment technology, and in particular to an electrolyte flow cell plate and an electrochemical ammonia synthesis electrolysis device. Background Technology

[0002] The flow cell plates in existing electrochemical ammonia synthesis electrolysis devices mainly include the following two structural forms: One is the straight groove type flow cell plate, which is an overall rectangular flat plate structure with parallel straight grooves on its surface serving as electrolyte channels. The two ends of the channels connect to the electrolyte inlet and outlet, respectively. There is no dedicated gas inlet / outlet area; gas is carried into the channels by the electrolyte. The channels are separated by solid ridges without other auxiliary structures. The other is the ribbed flow cell plate, which has independent gas and liquid channels separated by a porous membrane. The liquid channel area has transverse ribs that divide the main channel into multiple branch channels. The transverse ribs are continuous solid structures, serving only a separating function; the ribs have no guiding design, resulting in limited actual distribution effect.

[0003] The two flow tank plate structures described above have the following disadvantages: 1. Uneven fluid distribution: The existing flow channels of the flow tank plate are mostly simple straight grooves or equally divided structures, lacking active flow diversion design. This results in the electrolyte flowing slowly at the edge of the flow channel and flowing quickly in the center, causing uneven distribution of reactant concentration on the electrode surface. About 30% of the electrode area fails to fully participate in the reaction.

[0004] 2. High flow resistance and high energy consumption: In order to ensure structural strength, the ridge design of existing flow tank plates is relatively wide (usually accounting for more than 60% of the total flow channel area). The structural strength is guaranteed by relying solely on its own width, resulting in an open area ratio of generally less than 40%. The electrolyte flow resistance is high, and the power of the circulation pump needs to be increased to maintain the flow rate, which increases the system energy consumption.

[0005] 3. Conflict between structural strength and flow channel efficiency: If the ridge width is reduced to increase the opening ratio, the ridge strength will be insufficient, and it will be prone to deformation under assembly pressure or fluid impact, causing flow channel blockage or sealing failure; if the ridge width is increased, the flow resistance and distribution problems will be further aggravated.

[0006] 4. Low gas-liquid contact efficiency: The existing structure lacks a dedicated gas distribution design, and gas is prone to form large bubbles in the flow channel, resulting in "gas blockage" on the electrode surface and reducing the effective contact area of ​​the reaction interface.

[0007] Therefore, there is an urgent need for an electrolyte flow cell plate and an electrochemical ammonia synthesis electrolysis device to solve the above-mentioned technical problems. Summary of the Invention

[0008] The purpose of this invention is to provide an electrolyte flow cell plate and an electrochemical ammonia synthesis electrolysis device, which has the advantages of high porosity, uniform fluid distribution, low fluid flow resistance and high structural strength.

[0009] To achieve this objective, the present invention adopts the following technical solution: An electrolyte flow cell plate includes a plate body, on which are disposed: A first gas inlet / outlet area and a second gas inlet / outlet area are respectively disposed at both ends of the plate body along a first direction; An electrolyte flow field region is located in the central area of ​​the plate. This region contains n flow field ridges, which divide the region into n+1 electrolyte flow channels. Reinforcing ribs connect adjacent ridges. Along a third direction, the thickness of the reinforcing ribs is less than the thickness of the ridges, allowing the electrolyte to flow through both sides of the ribs. Areas not covered by the ridges and reinforcing ribs form a hollow area. A first electrolyte inlet / outlet area and a second electrolyte inlet / outlet area are respectively disposed at both ends of the plate along a second direction, and the first direction, the second direction and the third direction are perpendicular to each other; the first electrolyte inlet / outlet area includes an electrolyte inlet, and the second electrolyte inlet / outlet area includes an electrolyte outlet, and the electrolyte inlet is connected to the electrolyte outlet through the electrolyte flow field area.

[0010] As an optional technical solution for the above-mentioned electrolyte flow cell plate, the first gas inlet and outlet zone includes a cathode gas outlet and an anode gas inlet, and the cathode gas outlet and the anode gas inlet are arranged alternately along the second direction; The second gas inlet / outlet zone includes a cathode inlet and an anode outlet, and the cathode inlet and the anode outlet are arranged alternately along the second direction.

[0011] As an optional technical solution for the above-mentioned electrolyte flow cell plate, the reinforcing rib is centrally connected to the flow field ridge along the third direction.

[0012] As an optional technical solution for the above-mentioned electrolyte flow cell plate, the flow field ridge is a strip structure, and the flow field ridge extends along the second direction.

[0013] As an optional technical solution for the above-mentioned electrolyte flow cell plate, all the flow field ridges are arranged parallel to each other and at equal intervals along the first direction.

[0014] As an optional technical solution for the above-mentioned electrolyte flow cell plate, the reinforcing ribs and the flow field ridges are integrally formed.

[0015] As an optional technical solution for the above-mentioned electrolyte flow cell plate, the flow channel between the first electrolyte inlet / outlet area and the electrolyte flow field area is Z-shaped, and the flow channel between the second electrolyte inlet / outlet area and the electrolyte flow field area is Z-shaped.

[0016] As an optional technical solution for the above-mentioned electrolyte flow cell plate, the electrolyte flow cell plate further includes: Transition ridges are provided between the first electrolyte inlet / outlet area and the flow field ridge, and between the second electrolyte inlet / outlet area and the flow field ridge. Each transition ridge is L-shaped and includes a first segment and a second segment connected to each other. The first segment extends along the second direction and is spaced apart from either the first or second electrolyte inlet / outlet area. The second segment extends along the first direction and is connected to the flow field ridge. A transition flow channel is defined between two adjacent transition ridges, and each transition flow channel is connected to several electrolyte flow channels.

[0017] As an optional technical solution for the above-mentioned electrolyte flow cell plate, the reinforcing ribs are arranged in a radial, mesh, or dot matrix pattern.

[0018] To achieve this objective, the present invention also employs the following technical solutions: An electrochemical ammonia synthesis electrolysis device includes a cathode plate, a cathode electrode, a cathode sealing ring, an anode sealing ring, an anode electrode, an anode plate, and an electrolyte flow cell plate, wherein the electrolyte flow cell plate is sandwiched between the cathode sealing ring and the anode sealing ring.

[0019] Compared with the prior art, the present invention has at least the following technical effects: The electrolyte flow cell plate disclosed in this invention includes a plate body, on which are disposed a first gas inlet / outlet zone, a second gas inlet / outlet zone, an electrolyte flow field zone, and a first electrolyte inlet / outlet zone and a second electrolyte inlet / outlet zone. The first gas inlet / outlet zone and the second gas inlet / outlet zone are respectively disposed at both ends of the plate body along a first direction. The electrolyte flow field zone is located in the central region of the plate body, and n flow field ridges are disposed within the electrolyte flow field zone, dividing the electrolyte flow field zone into n+1 electrolyte flow channels. Adjacent flow field ridges are connected by [missing information - likely a specific type of connection]. The reinforcing ribs, along the third direction, have a thickness less than that of the flow field ridges, allowing the electrolyte to flow over both sides of the reinforcing ribs. The areas not covered by the flow field ridges and the reinforcing ribs form a hollow area. The first electrolyte inlet / outlet area and the second electrolyte inlet / outlet area are respectively located at both ends of the plate along the second direction, with the first direction, the second direction, and the third direction being perpendicular to each other. The first electrolyte inlet / outlet area includes an electrolyte inlet, and the second electrolyte inlet / outlet area includes an electrolyte outlet. The electrolyte inlet is connected to the electrolyte outlet through the electrolyte flow field area.

[0020] Under this structure, the overall structure of the electrolyte flow cell plate is rationally divided, with three functional areas integrated on the plate: an independent gas inlet / outlet area, an electrolyte flow field area, and an electrolyte inlet / outlet area, realizing orderly gas-liquid separation and contact, providing a foundation for efficient reaction. In addition, the setting of reinforcing ribs not only enhances the deformation resistance of the flow field ridges and improves the structural strength of the flow field ridges, but also increases the porosity and reduces the electrolyte flow resistance, solving the problem of the contradiction between structural strength and flow channel efficiency in the prior art. At the same time, it also has an active diversion function, reducing the flow rate deviation of the electrolyte and improving the uniformity of reactant concentration distribution on the electrode surface, thereby improving the ammonia synthesis rate.

[0021] The electrochemical ammonia synthesis electrolysis device disclosed in this invention includes a cathode plate, a cathode electrode, a cathode sealing ring, an anode sealing ring, an anode electrode, an anode plate, and an electrolyte flow cell plate, which is sandwiched between the cathode sealing ring and the anode sealing ring. This electrochemical ammonia synthesis electrolysis device has high electrochemical reaction efficiency and low system energy consumption. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the electrolyte flow cell plate and coil assembly provided in a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the electrolyte flow cell plate provided in a specific embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the cooling and heat dissipation module provided in a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the liquid cooling module provided in a specific embodiment of the present invention.

[0024] In the picture: 100, Cathode plate; 200, Cathode electrode; 300, Cathode sealing ring; 400, Flow cell plate; 500, Anode sealing ring; 600, Anode electrode; 700, Anode plate; 410. First gas inlet / outlet zone; 411. Cathode outlet; 412. Anode inlet; 420. Electrolyte flow field region; 421. Flow field ridge; 422. Reinforcing rib; 423. Hollowed-out area; 424. Transition ridge; 430. First electrolyte inlet / outlet area; 431. Electrolyte inlet; 440. Second gas inlet / outlet zone; 441. Cathode gas inlet; 442. Anode gas outlet; 450. Second electrolyte inlet / outlet area; 451. Electrolyte outlet. Detailed Implementation

[0025] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] In the description of this invention, it should 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," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] This embodiment discloses an electrochemical ammonia synthesis electrolysis device, such as... Figure 1 As shown, the assembly includes a cathode plate 100, a cathode electrode 200, a cathode sealing ring 300, an electrolyte flow cell plate 400, an anode sealing ring 500, an anode electrode 600, and an anode plate 700. By introducing nitrogen gas from the cathode plate 100 side, hydrogen gas from the anode side, and electrolyte through the electrolyte flow cell plate 400, ammonia gas can be generated on the surface of the cathode electrode 200 between the cathode plate 100 and the flow cell plate 400.

[0032] Compared with other flow cells, the electrolyte flow cell plate 400 disclosed in this embodiment has the characteristics of high porosity, uniform fluid distribution, and low fluid flow resistance.

[0033] Specifically, such as Figure 2 As shown, the electrolyte flow cell plate 400 includes a plate body, on which a first gas inlet / outlet zone 410, a second gas inlet / outlet zone 440, an electrolyte flow field zone 420, a first electrolyte inlet / outlet zone 430, and a second electrolyte inlet / outlet zone 450 are provided.

[0034] The first gas inlet / outlet zone 410 and the second gas inlet / outlet zone 440 are respectively located at both ends of the plate along the first direction for gas entry and exit; the electrolyte flow field zone 420 is located in the central area of ​​the plate and is the core reaction area. The electrolyte and gas mix in the electrolyte flow field zone 420 and react chemically to generate ammonia. The electrolyte flow field region 420 is provided with n (n is a natural number greater than 0) flow field ridges 421, which divide the electrolyte flow field region 420 into n+1 electrolyte flow channels. A reinforcing rib 422 connects two adjacent flow field ridges 421. The area not covered by the flow field ridges 421 and the reinforcing ribs 422 forms a hollow area 423. The first electrolyte inlet / outlet region 430 and the second electrolyte inlet / outlet region 450 are respectively provided at both ends of the plate along the second direction, which is perpendicular to the first direction. The first electrolyte inlet / outlet region 430 includes an electrolyte inlet 431, and the second electrolyte inlet / outlet region 450 includes an electrolyte outlet 451. The electrolyte inlet 431 is connected to the electrolyte outlet 451 through the electrolyte flow field region 420.

[0035] In this embodiment, the electrolyte flow tank plate 400 has a rational overall structure, integrating three functional areas: an independent gas inlet / outlet area, an electrolyte flow field area 420, and an electrolyte inlet / outlet area. This achieves orderly gas-liquid separation and contact, providing a foundation for efficient reactions. Furthermore, the reinforcing ribs 422 not only increase the deformation resistance and structural strength of the flow field ridges 421, but also increase the porosity, reducing electrolyte flow resistance. This solves the problem of the contradiction between structural strength and flow channel efficiency in existing technologies. Simultaneously, it also has an active flow diversion function, reducing electrolyte flow rate deviation and improving the uniformity of electrolyte distribution, thereby increasing the ammonia synthesis rate.

[0036] Optionally, the first gas inlet / outlet zone 410 includes a cathode outlet 411 and an anode inlet 412, and the cathode outlet 411 and the anode inlet 412 are arranged alternately along the second direction; the second gas inlet / outlet zone 440 includes a cathode inlet 441 and an anode outlet 442, and the cathode inlet 441 and the anode outlet 442 are arranged alternately along the second direction.

[0037] Furthermore, along a third direction, such as Figure 3 As shown, the thickness h of the reinforcing rib 422 is less than the thickness H of the flow field ridge 421, and the first, second, and third directions are perpendicular to each other. This structure allows the electrolyte to collide with and be diverted by the reinforcing rib 422 after entering the electrolyte flow field region 420, flowing towards the two side edge regions of the reinforcing rib 422. After flowing past the reinforcing rib 422, the electrolyte converges again, and upon encountering the next reinforcing rib 422, it is diverted once more. In other words, the reinforcing rib 422 has a diversion effect on the electrolyte. It can be understood that the third direction is the thickness direction.

[0038] Furthermore, such as Figure 3 As shown, along the third direction, the reinforcing rib 422 is centrally connected to the flow field ridge 421, meaning that the reinforcing rib 422 is centrally arranged relative to the flow field ridge 421. The central arrangement of the reinforcing rib 422 ensures that the electrolyte flow rate on both sides of the reinforcing rib 422 is the same, improving the uniformity of electrolyte flow and thus increasing the efficiency of the electrochemical reaction.

[0039] In this embodiment, the cross-section of the reinforcing rib 422 can be rectangular, rhomboid, star-shaped, or circular, etc., and can be designed according to the actual situation.

[0040] By setting the reinforcing ribs 422, the structural strength of the flow field ridge 421 is ensured, and the width of the flow field ridge 421 is less than or equal to the width of the electrolyte flow channel, thereby ensuring that the opening ratio of the electrolyte flow field region 420 is ≥40%.

[0041] In this embodiment, the reinforcing rib 422 and the flow field ridge 421 are integrally formed. This not only increases the deformation resistance of the flow field ridge 421, but also diverts the electrolyte to the edge region through its side.

[0042] Optionally, the flow field ridge 421 is a strip-shaped structure, and the flow field ridge 421 extends along the second direction. Under this structure, the electrolyte flow channel in the electrolyte flow field region 420 is a strip-shaped flow channel extending along the second direction, and the electrolyte flows along the second direction.

[0043] Alternatively, all flow field ridges 421 are arranged parallel to each other and at equal intervals along the first direction. This structure can further improve the uniformity of electrolyte flow in the electrolyte flow field region 420, thereby improving the uniformity of reactant concentration distribution on the electrode surface and thus increasing the ammonia synthesis rate.

[0044] In this embodiment, the reinforcing rib 422 adopts a mesh or lattice structure to form a multi-node diversion structure, which enhances the diversion effect on the electrolyte, reduces the flow velocity deviation of the electrolyte in different regions of the flow field, improves the uniformity of reactant concentration distribution on the electrode surface, and thus enhances the chemical reaction rate.

[0045] In this embodiment, such as Figure 4 As shown, the inlet channel between the first electrolyte inlet / outlet zone 430 and the electrolyte flow field zone 420 is Z-shaped, and the outlet channel between the second electrolyte inlet / outlet zone 450 and the electrolyte flow field zone 420 is Z-shaped. This structure ensures the sealing of the chemical reaction zone.

[0046] Specifically, to achieve the above structure, a flow-through hole is formed on both the front and back surfaces of the plate in the region between the first electrolyte inlet / outlet zone 430 and the electrolyte flow field zone 420. The two flow-through holes are vertically connected along a third direction. After the electrolyte enters the plate through the electrolyte inlet 431, it flows from the flow-through hole on the front surface of the plate along the third direction to the flow-through hole on the back surface, and then flows to the electrolyte flow field zone 420, thus forming a Z-shaped inlet channel. Similarly, a flow-through hole is also formed on both the front and back surfaces of the plate in the region between the second electrolyte inlet / outlet zone 450 and the electrolyte flow field zone 420. The two flow-through holes are vertically connected along a third direction. The electrolyte flows from the electrolyte flow field zone 420 to the flow-through hole on the back surface of the plate, then flows along the third direction to the flow-through hole on the front surface of the plate, and finally flows out from the electrolyte outlet 451, thus forming a Z-shaped outlet channel.

[0047] like Figure 2 As shown, the electrolyte flow tank plate 400 in this embodiment also includes transition ridges 424. The transition ridges 424 are disposed in the electrolyte flow field region 420. Transition ridges 424 are provided between the first electrolyte inlet / outlet region 430 and the flow field ridge 421, and between the second electrolyte inlet / outlet region 450 and the flow field ridge 421. Taking the transition ridge 424 between the first electrolyte inlet / outlet region 430 and the flow field ridge 421 as an example: the transition ridge 424 is L-shaped, including a first segment and a second segment connected together. The first segment extends along a second direction and is spaced apart from the first electrolyte inlet / outlet region 430, while the second segment extends along a first direction and is connected to the flow field ridge 421. A transition channel is defined between two adjacent transition ridges 424, and this transition channel is connected to several electrolyte flow channels. The specific structure of the transition ridge 424 between the second electrolyte inlet / outlet region 450 and the flow field ridge 421 is the same as above and will not be described again.

[0048] By setting transition ridges 424, the electrolyte flows in from the electrolyte inlet 431 of the first electrolyte inlet / outlet zone 430, passes through the Z-shaped flow channel, flows into the electrolyte channel through the transition channel at one end, and then flows out through the transition channel at the other end to the electrolyte outlet 451 of the second electrolyte inlet / outlet zone 450. The transition channels have a rectifying effect on the flow of the electrolyte, making the electrolyte flow uniform on the electrolyte flow tank plate 400, thereby ensuring the uniformity and efficiency of the electrochemical reaction.

[0049] Optionally, a side stiffener 422 may be provided between the second segments of two adjacent transition ridges 424 to enhance the structural strength and impact resistance of the transition ridges 424, while also having a diversion function.

[0050] Furthermore, the side reinforcing ribs 422 adopt a radial structural layout, extending from the electrolyte inlet towards the electrolyte flow field region 420, forming a multi-node flow distribution structure. Combined with the reinforcing ribs 422 structure between the flow field ridges 421, this not only increases structural strength but also actively guides the electrolyte to distribute evenly, improving fluid uniformity.

[0051] In this embodiment, both the cathode electrode 200 and the anode electrode 600 of the electrochemical ammonia synthesis electrolysis device are made of porous materials. These porous materials are used to adhere the catalyst. The thickness of the porous materials is ≤1 mm. The porous materials can be metallic or non-metallic.

[0052] Optionally, the cathode plate 100 and the anode plate 700 have a flow field structure in which the reaction gas required for ammonia synthesis flows uniformly.

[0053] Compared with the prior art, the electrolyte flow cell plate 400 in this embodiment has at least the following advantages: 1. Improved fluid distribution uniformity: The reinforcing rib 422 has an active diversion function, which can actively guide the electrolyte to be evenly distributed, so that the flow rate deviation of the electrolyte in each region of the electrolyte flow field 420 is reduced from ±30% in the prior art to within ±5%, the concentration distribution of reactants on the electrode surface is uniform, and the utilization rate of the effective reaction area is increased from 70% to more than 95%, directly increasing the ammonia synthesis rate by about 35%.

[0054] 2. Reduced flow resistance and energy savings: While ensuring structural strength, the open area ratio is increased to over 60% (current technology typically ≤40%), and the electrolyte flow resistance is reduced by over 40% while maintaining structural strength. The power requirement of the circulation pump is reduced accordingly, and the overall energy consumption of the system is reduced by 15%-20%.

[0055] 3. Balancing structural strength and flow channel efficiency: The synergistic design of the reinforcing rib 422 and the flow field ridge 421 improves the deformation resistance of the flow pool plate 400 by more than 50% while maintaining a high open area ratio, thus resolving the contradiction between strength and open area ratio in the prior art.

[0056] 4. Optimization of gas-liquid contact efficiency: The electrolyte is more evenly dispersed in the hollow flow field area, and the gas-liquid contact area increases by 2-3 times, further improving the efficiency of nitrogen reduction reaction.

[0057] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

[0058] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. An electrolyte flow cell plate, characterized by, The plate body is provided with: a first gas inlet and outlet area (410) and a second gas inlet and outlet area (440), the first gas inlet and outlet area (410) and the second gas inlet and outlet area (440) are respectively arranged at both ends of the plate body along a first direction; an electrolyte flow field area (420) located in the central region of the plate body, the electrolyte flow field area (420) is provided with n flow field ridges (421), the n flow field ridges (421) separate the electrolyte flow field area (420) into n+1 electrolyte flow channels, a reinforcing rib (422) is connected between two adjacent flow field ridges (421), along a third direction, the thickness of the reinforcing rib (422) is less than the thickness of the flow field ridge (421), so that the electrolyte can flow from both sides of the reinforcing rib (422), and the uncovered areas of the flow field ridge (421) and the reinforcing rib (422) form a hollow area (423); and a first electrolyte inlet and outlet area (430) and a second electrolyte inlet and outlet area (450), the first electrolyte inlet and outlet area (430) and the second electrolyte inlet and outlet area (450) are respectively arranged at both ends of the plate body along a second direction, the first direction, the second direction and the third direction are perpendicular to each other; the first electrolyte inlet and outlet area (430) includes an electrolyte inlet (431), and the second electrolyte inlet and outlet area (450) includes an electrolyte outlet (451), the electrolyte inlet (431) is connected in communication with the electrolyte outlet (451) through the electrolyte flow field area (420).

2. The electrolyte flow cell plate according to claim 1, wherein the first gas inlet and outlet area (410) includes a cathode gas outlet (411) and an anode gas inlet (412), and the cathode gas outlet (411) and the anode gas inlet (412) are alternately arranged along the second direction; the second gas inlet and outlet area (440) includes a cathode gas inlet (441) and an anode gas outlet (442), and the cathode gas inlet (441) and the anode gas outlet (442) are alternately arranged along the second direction.

3. The electrolyte flow cell plate according to claim 1, wherein along the third direction, the reinforcing rib (422) is connected to the flow field ridge (421) in the middle.

4. The electrolyte flow cell plate according to claim 1, wherein the flow field ridge (421) is a strip-shaped structure, and the flow field ridge (421) extends along the second direction.

5. The electrolyte flow cell plate according to claim 4, wherein all the flow field ridges (421) are arranged in parallel and equally spaced along the first direction.

6. The electrolyte flow cell plate according to claim 1, wherein the reinforcing rib (422) and the flow field ridge (421) are an integral structure.

7. The electrolyte flow cell plate according to any one of claims 1-6, wherein The flow channel between the first electrolyte inlet and outlet area (430) and the electrolyte flow field area (420) is Z-shaped, and the flow channel between the second electrolyte inlet and outlet area (450) and the electrolyte flow field area (420) is Z-shaped.

8. The electrolyte flow cell plate of claim 7, wherein, The electrolyte flow cell plate (400) further comprises: A transition ridge (424) is arranged between the first electrolyte inlet and outlet area (430) and the flow field ridge (421) and between the second electrolyte inlet and outlet area (450) and the flow field ridge (421); the transition ridge (424) is L-shaped and comprises a first section and a second section connected to each other, the first section extends along the second direction and is arranged spaced apart from the first electrolyte inlet and outlet area (430) or the second electrolyte inlet and outlet area (450), and the second section extends along the first direction and is connected to the flow field ridge (421); two adjacent transition ridges (424) define a transition flow channel, and one transition flow channel is connected to a plurality of electrolyte flow channels.

9. The electrolyte flow cell plate according to any one of claims 1-6, wherein The reinforcing ribs (422) are arranged in a radial, mesh or dot array.

10. An electrochemical ammonia synthesis electrolyzer device, characterized by, The electrolyte flow cell plate (400) is arranged between the cathode sealing ring (300) and the anode sealing ring (500). The electrolyte flow cell plate (400) is arranged between the cathode sealing ring (300) and the anode sealing ring (500).

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