Flow path plate for electrolytic cell and electrolytic cell comprising the same

Abstract

The invention relates to a flow path plate for an electrolytic cell and an electrolytic cell comprising the flow path plate. The flow path plate for an electrolytic cell according to the present invention is a flow path plate for an electrolytic cell facing an electrode causing an electrochemical reaction, and comprises: a supply-side flow path member having a plurality of branch flow paths for supplying a raw material fluid; and a channel member including a plurality of channels, one side portion of which is connected to the supply-side flow path member and through which the supplied raw material fluid moves, in which the supply-side flow path member has a plurality of flow path blocks by which the branch flow paths are branched into a plurality, and the widths of the plurality of branch flow paths are uniform.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Korean Patent Application No. 10-2022-0110644 filed on September 1, 2022 and Korean Patent Application No. 10-2023-0115367 filed on August 31, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0004] The present invention relates to a passage plate for an electrolytic cell, and an electrolytic cell comprising the passage plate. Background Art

[0005] Batteries for electrolyzing carbon dioxide (CO2) to convert it into useful resources such as CO or ethylene need to ensure that the active area reaches a certain level or higher by increasing the area in addition to stacking for scale-up.

[0006] In the design of large-area batteries, it is important to design a passage structure that can uniformly supply CO2 gas and electrolyte to the entire active area.

[0007] Typical research on CO2 electrochemical conversion technology mainly focuses on ensuring the performance of small-sized batteries, and when the structures of these small-sized batteries are applied as they are to increase the active area of ​​the battery, the efficiency of the large-area battery may be reduced compared with the small-sized battery. Summary of the invention

[0008] Technical issues

[0009] One aspect of the present invention is to provide a passage plate for an electrolytic cell, the passage plate being capable of improving material transfer characteristics and cell performance efficiency, and an electrolytic cell including the passage plate.

[0010] Technical Solution

[0011] A passage plate for an electrolytic cell according to an embodiment of the present invention is a passage plate for an electrolytic cell facing an electrode causing an electrochemical reaction, and the passage plate may include: a supply-side passage component in which a branch passage is provided, the branch passage being branched into a plurality of passages through which a raw material fluid is supplied; and a channel component having a side portion connected to the supply-side passage component and in which a plurality of channels through which the supplied raw material fluid flows are provided, wherein the supply-side passage component includes a plurality of passage blocks, a plurality of branch passages branch out through the plurality of passage blocks, and the respective widths of the plurality of branch passages are uniform.

[0012] In addition, the electrolytic cell according to the embodiment of the present invention may include a passage plate for an electrolytic cell according to the embodiment of the present invention, and an electrode facing the passage plate.

[0013] Beneficial Effects

[0014] According to the present invention, in a passage plate for an electrolytic cell facing an electrode, a branch passage is provided in a supply-side passage member, the branch passage being branched into a plurality of passages through which a raw material fluid is supplied, and the passage can be branched to have a uniform width by a plurality of passage blocks. Therefore, the raw material fluid can be supplied to uniformly flow to a plurality of passages of a passage member through which the raw material fluid flows.

[0015] Therefore, the flow of reactant fluids is improved to improve material transport characteristics necessary for electrochemical reactions, thereby optimizing performance efficiency, and local degradation is prevented to improve durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a side view illustrating an example of an electrolytic cell according to an embodiment of the present invention.

[0017] Figure 2 is a plan view illustrating an example of a passage plate for an electrolytic cell according to a first embodiment of the present invention.

[0018] Figure 3 is an enlarged plan view illustrating a portion of a supply-side passage member of a passage plate for an electrolytic cell according to a first embodiment of the present invention.

[0019] Figure 4 is a plan view illustrating an example of a passage plate for an electrolytic cell according to a second embodiment of the present invention.

[0020] Figure 5 is an enlarged plan view illustrating a portion of a supply-side passage member of a passage plate for an electrolytic cell according to a second embodiment of the present invention.

[0021] Figure 6 is a plan view illustrating an example of a passage plate for an electrolytic cell according to a third embodiment of the present invention.

[0022] Figure 7 is an enlarged plan view illustrating a portion of a supply-side passage member of a passage plate for an electrolytic cell according to a third embodiment of the present invention.

[0023] Figure 8 is an image illustrating a flow velocity distribution in a passage plate for an electrolytic cell according to Comparative Example 1.

[0024] Fig. 9is an image illustrating a flow velocity distribution in a passage plate for an electrolytic cell according to Manufacturing Example 1.

[0025] Fig.10 is an image illustrating a flow velocity distribution in a passage plate for an electrolytic cell according to Manufacturing Example 2.

[0026] Fig.11 is an image illustrating a flow velocity distribution in a passage plate for an electrolytic cell according to Manufacturing Example 3. DETAILED DESCRIPTION

[0027] The objects, particular advantages and novel features of the present invention will be illustrated by the following embodiments described with reference to the accompanying drawings. Note that identical elements, even if they are shown in different drawings, are represented by identical reference numerals as much as possible. The present invention may be implemented in different forms and should not be construed as being limited to the embodiments described herein. In addition, in the following description of the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the subject matter of the present invention will be excluded.

[0028] Passage plate for electrolytic cell according to first embodiment

[0029] Figure 1 is a side view illustrating an example of an electrolytic cell according to an embodiment of the present invention. Figure 2 is a plan view illustrating an example of a passage plate for an electrolytic cell according to a first embodiment of the present invention. Figure 3 is an enlarged plan view illustrating a portion of a supply-side passage member of a passage plate for an electrolytic cell according to a first embodiment of the present invention.

[0030] Reference Figures 1 to 3 The passage plate 100 for an electrolytic cell according to the first embodiment of the present invention is a passage plate 100 for an electrolytic cell facing an electrode E causing an electrochemical reduction reaction, and the passage plate 100 includes a supply-side passage member 120 for supplying a raw material fluid and a channel member 130 in which a plurality of channels 131 through which the supplied raw material fluid flows are provided. In addition, the passage plate 100 for an electrolytic cell according to the first embodiment of the present invention may include a manifold inlet 110, a discharge-side passage member 140, and a manifold outlet 150.

[0031] In more detail, in the passage plate 100 for an electrolytic cell according to the first embodiment of the present invention, a branch passage 123 may be provided in the supply side passage member 120, the branch passage 123 being branched into a plurality of passages (hereinafter referred to as a plurality of branch passages 123) through which a raw material fluid is supplied. Here, the raw material fluid may include carbon dioxide (CO2) and an electrolyte. Here, the electrolyte may include water (H2O).

[0032] The supply side passage member 120 may be provided with a plurality of passage blocks 121, and a plurality of branch passages 123 may be branched through the plurality of passage blocks 121. That is, a plurality of branch passages 123 into which one passage as a passage for supplying raw material fluid is branched through the plurality of passage blocks 121 may be provided.

[0033] The respective widths W1 and W2 of the plurality of branch passages 123 may be uniform. Here, the term "uniform" means that the difference between the widths W1 and W2 of the plurality of branch passages 123 is constant. That is, the widths W1 and W2 of the plurality of branch passages 123 of the supply side passage component 120 may be the same as each other. In particular, the width W1 of each of the branch passages 123 disposed at the two side portions of the supply side passage component 120 may be set to be the same as the width W2 of each of the other branch passages 123 of the supply side passage component 120. Here, a groove 120a recessed inwardly from each of the two side portions of the supply side passage component 120 may be defined so that the width W1 of each of the branch passages 123 disposed at the two side portions of the supply side passage component 120 is the same as the width W12 of each of the other branch passages 123 of the supply side passage component 120.

[0034] Here, the plurality of branch passages 123 may be passage portions facing the channel member 130 .

[0035] Each of the widths W1 and W2 of the plurality of branch passages 123 of the supply-side passage member 120 branched by the plurality of passage blocks 121 may be, for example, 0.25 mm to 1 mm.

[0036] The number of the plurality of branch passages 123 of the supply-side passage member 120 may correspond to the number of the plurality of channels 131 .

[0037] The positions of the plurality of branch passages 123 of the supply side passage member 120 and the positions of the plurality of passages 131 of the passage member 130 may be arranged to correspond to each other. Figure 2 , the multiple branch passages 123 can be vertically collinear with the multiple channels 131 respectively.

[0038] Each of the plurality of passage blocks 121 may have, for example, a cross-section having a circular or non-circular shape. Here, as a specific example, each of the plurality of passage blocks 121 may have a circular cross-section.

[0039] The channel member 130 may have one side portion connected to the supply-side passage member 120 , and may be provided with a plurality of channels 131 through which carbon dioxide and electrolyte, which are raw material fluids to be supplied, flow.

[0040] When the channel member 130 faces the electrode E and the plurality of channels 131 are provided on a surface of the channel member 130 facing the electrode E, the raw material fluid flowing through the plurality of channels 131 contacts the electrode E, and an electrochemical reaction occurs in the electrode E.

[0041] In the channel member 130 , a plurality of channels 131 may be provided in a straight line so that the raw material fluid flows from one side portion where the supply-side passage member 120 is provided to the other side portion in a straight line direction.

[0042] Here, a plurality of channel protrusions 131a may be provided in a straight line so that the channel 131 is provided in a straight line. That is, the channel protrusion 131a may protrude in the direction of the electrode E and refer to Figure 2 Extending vertically, a channel 131 is provided as a passage through which a fluid flows vertically.

[0043] In addition, for example, the passage 131 may have a width WC1 greater than each of the widths W1 and W2 of the plurality of branch passages 123 of the supply-side passage member 120 .

[0044] The width WC1 of the channel 131 may be, for example, 0.5 mm to 2 mm.

[0045] The channel 130 may have a width of, for example, 100 cm 2 or larger area.

[0046] The manifold inlet 110 may be connected to the supply-side passage member 120, and the raw material fluid may flow into the manifold inlet 110. Here, the supply-side passage member 120 may supply the raw material fluid flowing out of the manifold inlet 110.

[0047] The manifold inlet 110 may include an inlet hole.

[0048] The exhaust-side passage member 140 may be connected to the other side portion of the channel member 130 to provide a plurality of passages through which reactants are exhausted.

[0049] In addition, the discharge-side passage member 140 may be provided with a discharge-side passage block 141 through which a plurality of passages are branched.

[0050] In addition, the discharge side passage member 140 may have a shape corresponding to the shape of the supply side passage member 120. That is, the branching shape of the passage of the discharge side passage member 140 may be the same as the branching shape of the passage of the supply side passage member 120.

[0051] The manifold outlet 150 may be connected to the exhaust-side passage member 140 so that the reactants are exhausted.

[0052] Here, the reactant may be carbon monoxide (CO), ethylene (C2H4), or the like.

[0053] Manifold outlet 150 may include a discharge aperture.

[0054] The passage plate 100 for an electrolytic cell according to the first embodiment of the present invention constructed as above is a passage plate 100 for an electrolytic cell facing the electrode E, and a branch passage 123 is provided in the supply side passage member 120, the branch passage 123 is branched into a plurality of passages through which the raw material fluid is supplied, and the supply side passage member 120 can provide the branch passage 123 branched into a uniform width through a plurality of passage blocks 121. Therefore, the raw material fluid can be supplied to uniformly flow to the plurality of channels 131 of the channel member 130 through which the raw material fluid flows. Therefore, the fluid flow of the reactant is improved to improve the material transfer characteristics necessary for the electrochemical reaction, thereby optimizing the performance efficiency, and preventing local degradation to improve the durability.

[0055] Passage plate for electrolytic cell according to second embodiment

[0056] Hereinafter, a passage plate for an electrolytic cell according to a second embodiment of the present invention will be described.

[0057] Figure 4 is a plan view illustrating an example of a passage plate for an electrolytic cell according to a second embodiment of the present invention. Figure 5 is an enlarged plan view illustrating a portion of a supply-side passage member of a passage plate for an electrolytic cell according to a second embodiment of the present invention.

[0058] Reference Figure 1 , Figure 4 and Figure 5 The passage plate 200 for an electrolytic cell according to the second embodiment of the present invention is a passage plate for an electrolytic cell facing an electrode E causing an electrochemical reduction reaction, and the passage plate 200 includes a supply-side passage member 220 for supplying a raw material fluid and a channel member 130 in which a plurality of channels 131 through which the supplied raw material fluid flows are provided. In addition, the passage plate 200 for an electrolytic cell according to the second embodiment of the present invention may include a manifold inlet 110, a discharge-side passage member 240, and a manifold outlet 150.

[0059] When compared with the passage plate for an electrolytic cell according to the first embodiment described above, the passage plate 200 for an electrolytic cell according to the embodiment of the present invention is different in the shape of passages branched by passage blocks 221 and 222 in a supply-side passage member 220. Therefore, this embodiment will be described by omitting or simply describing the contents common to the above-described embodiment and focusing on the differences.

[0060] In more detail, in the passage plate 200 for an electrolytic cell according to the second embodiment of the present invention, a plurality of branch passages 223 may be provided in the supply side passage member 220, and the raw material fluid may be supplied through the plurality of branch passages 223. Here, the raw material fluid may include carbon dioxide (CO2) and an electrolyte. Here, the electrolyte may include water (H2O).

[0061] The supply side passage component 220 may be provided with a plurality of passage blocks 221 and 222, and a plurality of branch passages 223 may be branched out through the plurality of passage blocks 221 and 222. Here, the widths W23 and W24 of the plurality of branch passages 223 may be uniform. That is, the widths W23 and W24 of the plurality of branch passages 223 of the supply side passage component 220 may be the same as each other. Here, the plurality of branch passages 223 may be passage portions facing the channel component 130.

[0062] Each of the plurality of passage blocks 221 and 222 may have, for example, a cross-section having a circular or non-circular shape. Here, as a specific example, each of the plurality of passage blocks 221 and 222 may have a circular cross-section.

[0063] In addition, a plurality of passage blocks 221 and 222 may be arranged in multiple rows. Here, a plurality of passage blocks 221 and 222 arranged in multiple rows may be arranged to be misaligned between the rows. Therefore, since a plurality of passage blocks 221 and 222 are arranged in multiple rows and are arranged to be misaligned between the rows, the flow distribution of the fluid may be performed more easily.

[0064] Here, the plurality of branch passages 223 may be branch passages 223 in which the flow is distributed by the passage blocks 221 in the row adjacent to the channel member 130 among the passage blocks 221 and 222 arranged in the plurality of rows. That is, the branch passages 223 may be branch passages 223 in which the flow is finally distributed by the passage blocks 221 arranged in the row which is the last row among the plurality of rows and is most adjacent to the channel member 130. For example, the number of the plurality of branch passages 223 of the supply-side passage member 220 may be set to be greater than the number of the plurality of channels 131, but the passage plate 200 for an electrolytic cell according to the second embodiment of the present invention is not necessarily limited thereto.

[0065] In addition, the plurality of via blocks 221 and 222 arranged in a plurality of rows may be arranged in, for example, two rows. Here, the plurality of via blocks 221 and 222 arranged in two rows are disposed to be misaligned between rows and may be arranged in a zigzag form.

[0066] When the plurality of passage blocks 221 and 222 are arranged in two rows, and when the row close to the channel member 130 is referred to as the first row and the row close to the manifold inlet 110 is referred to as the second row, the distances between the plurality of passage blocks 221 arranged in the first row may be set to be the same, and the distances between the plurality of passage blocks 222 arranged in the second row may be set to be the same. Here, the distances between the plurality of passage blocks 221 arranged in the first row and the distances between the plurality of passage blocks 222 arranged in the second row may be set to be the same as each other. Therefore, the flow of the fluid may be more easily evenly distributed.

[0067] Here, the respective widths W21 and W22 of the passages 224 branched out by the plurality of passage blocks 222 arranged in the second row may be identical to each other. In addition, in the passages 224 branched out by the plurality of passage blocks 222 arranged in the second row, the width W21 of each of the passages arranged in the two side portions of the supply side passage component 220 may be arranged to be identical to the width W22 of each of the other passages.

[0068] The channel member 130 may have one side portion connected to the supply-side passage member 220 , and may be provided with a plurality of channels 131 through which carbon dioxide and electrolyte, which are raw material fluids to be supplied, flow.

[0069] When the channel member 130 faces the electrode E and the plurality of channels 131 are provided on a surface of the channel member 130 facing the electrode E, the raw material fluid flowing through the plurality of channels 131 contacts the electrode E, and an electrochemical reaction occurs in the electrode E.

[0070] In the channel member 130 , a plurality of channels 131 may be provided in a straight line so that the raw material fluid flows from one side portion where the supply-side passage member 220 is provided to the other side portion in a straight line direction.

[0071] In addition, for example, the passage 131 may have a width WC2 greater than each of the widths W23 and W24 of the plurality of branch passages 223 of the supply-side passage member 220 .

[0072] The manifold inlet 110 may be connected to the supply-side passage member 220, and the raw material fluid may flow into the manifold inlet 110. Here, the supply-side passage member 220 may supply the raw material fluid flowing out from the manifold inlet 110.

[0073] The manifold inlet 110 may include an inlet hole.

[0074] The exhaust-side passage member 240 may be connected to the other side portion of the channel member 130 to provide a plurality of passages through which reactants are exhausted.

[0075] The discharge-side passage member 240 may have a shape corresponding to that of the supply-side passage member 220 .

[0076] The manifold outlet 150 may be connected to the exhaust-side passage member 240 so that the reactants are exhausted.

[0077] Here, the reactant may be carbon monoxide (CO), ethylene (C2H4), or the like.

[0078] Manifold outlet 150 may include a discharge aperture.

[0079] Passage plate for electrolytic cell according to third embodiment

[0080] Hereinafter, a passage plate for an electrolytic cell according to a third embodiment of the present invention will be described.

[0081] Figure 6 is a plan view illustrating an example of a passage plate for an electrolytic cell according to a third embodiment of the present invention. Figure 7 is an enlarged plan view illustrating a portion of a supply-side passage member of a passage plate for an electrolytic cell according to a third embodiment of the present invention.

[0082] Reference Figure 1 , Figure 6 and Figure 7 The passage plate 300 for an electrolytic cell according to the third embodiment of the present invention is a passage plate 300 for an electrolytic cell facing an electrode E causing an electrochemical reduction reaction, and the passage plate 300 includes a supply-side channel member 320 for supplying a raw material fluid and a channel member 130 in which a plurality of channels 131 through which the supplied raw material fluid flows are provided. In addition, the passage plate 300 for an electrolytic cell according to the third embodiment of the present invention may include a manifold inlet 110, a discharge-side passage member 340, and a manifold outlet 150.

[0083] When compared with the passage plate for an electrolytic cell according to the first and second embodiments described above, the passage plate 300 for an electrolytic cell according to the third embodiment of the present invention is different in the shape of the passage branched by the passage block 321 in the supply-side passage member 320. Therefore, this embodiment will be described by omitting or simply describing the contents common to the above-described embodiments and focusing on the differences.

[0084] In more detail, in the passage plate 300 for an electrolytic cell according to the third embodiment of the present invention, a plurality of branch passages 323 may be provided in the supply side passage member 320, and the raw material fluid may be supplied through the plurality of branch passages 323. Here, the raw material fluid may include carbon dioxide (CO2) and an electrolyte. Here, the electrolyte may include water (H2O).

[0085] The supply side passage component 320 may be provided with a plurality of passage blocks 321, and a plurality of branch passages 323 may be branched out through the plurality of passage blocks 321. Here, the corresponding widths W31 and W32 of the plurality of branch passages 323 may be uniform. That is, the widths W31 and W32 of the plurality of branch passages 323 of the supply side passage component 320 may be the same as each other. Here, a groove 320a that is recessed inwardly from each of the two side portions of the supply side passage component 320 may be defined so that the width W31 of each branch passage in the branch passages 323 provided at the two side portions of the supply side passage component 320 is the same as the width W2 of each branch passage in the other branch passages 323 of the supply side passage component 320.

[0086] Here, the plurality of branch passages 323 may be passage portions facing the channel member 130 .

[0087] Each of the plurality of passage blocks 321 may have, for example, a cross section having a circular or non-circular shape. Here, as a specific example, each of the plurality of passage blocks 321 may have a cross section having a diamond shape among non-circular shapes.

[0088] The channel member 130 may have one side portion connected to the supply-side passage member 320 , and may be provided with a plurality of channels 131 through which carbon dioxide and electrolyte, which are raw material fluids to be supplied, flow.

[0089] In addition, when the channel member 130 faces the electrode E and the plurality of channels 131 are provided on the surface of the channel member 130 facing the electrode E, the raw material fluid flowing through the plurality of channels 131 contacts the electrode E and an electrochemical reaction occurs in the electrode E.

[0090] In the channel member 130 , a plurality of channels 131 may be provided in a straight line so that the raw material fluid flows from one side portion where the supply-side passage member 320 is provided to the other side portion in a straight line direction.

[0091] In addition, for example, the channel member 130 may have a width WC3 greater than or less than each of the widths W31 and W32 of the plurality of branch passages 323 of the supply side passage member 320, but the passage plate 300 for an electrolytic cell according to the third embodiment of the present invention is not necessarily limited thereto.

[0092] The manifold inlet 110 may be connected to the supply-side passage member 320, and the raw material fluid may flow into the manifold inlet 110. Here, the supply-side passage member 320 may supply the raw material fluid flowing out of the manifold inlet 110.

[0093] The manifold inlet 110 may include an inlet hole.

[0094] The exhaust-side passage member 340 may be connected to the other side portion of the channel member 130 to provide a plurality of passages through which reactants are exhausted.

[0095] In addition, the discharge-side passage member 340 may have a shape corresponding to the shape of the supply-side passage member 320. That is, the passage shape of the discharge-side passage member 340 may be the same as the passage shape of the supply-side passage member 320.

[0096] The manifold outlet 150 may be connected to the exhaust-side passage member 340 so that the reactants are exhausted.

[0097] Here, the reactant may be carbon monoxide (CO), ethylene (C2H4), or the like.

[0098] Manifold outlet 150 may include a discharge aperture.

[0099] Electrolytic cell according to an embodiment

[0100] Hereinafter, an electrolytic cell according to an embodiment of the present invention will be described.

[0101] Reference Figures 1 to 3 , the electrolytic cell 1000 according to the embodiment of the present invention includes a passage plate 100 and an electrode E facing the passage plate 100. Here, the passage plate 100 is a passage plate 100 for the electrolytic cell facing the electrode E causing the electrochemical reduction reaction, and the passage plate 100 includes a supply side passage member 120 for supplying a raw material fluid and a channel member 130 in which a plurality of channels 131 through which the supplied raw material fluid flows are provided. In addition, the passage plate 100 may include a manifold inlet 110, a discharge side passage member 140, and a manifold outlet 150. The electrolytic cell 1000 according to the embodiment of the present invention may further include an ion exchange membrane I.

[0102] The electrolytic cell 1000 according to an embodiment of the present invention relates to an electrolytic cell 1000 including the passage plate for an electrolytic cell according to the first embodiment, the second embodiment, or the third embodiment described above. Therefore, the embodiment will be described by omitting or simply describing the contents common to the embodiments of the passage plate for an electrolytic cell according to the first to third embodiments described above and focusing on the differences.

[0103] In more detail, the electrode E may face the passage plate 100 to cause an electrochemical reduction reaction. Here, the electrode E may electrolyze, for example, carbon dioxide (CO2) into carbon monoxide (CO), ethylene (C2H4), and the like.

[0104] The electrode E may include an anode A and a cathode C.

[0105] In the passage plate 100, a plurality of branch passages 123 may be provided in the supply side passage component 120, and the raw material fluid may be supplied through the plurality of branch passages 123. Here, the raw material fluid may include carbon dioxide (CO2) and an electrolyte. Here, the electrolyte may include water (H2O). The supply side passage component 120 may be provided with a plurality of passage blocks 121, and a plurality of branch passages 123 may be branched out through the plurality of passage blocks 121. Here, the respective widths W1 and W2 of the plurality of branch passages 123 may be uniform. That is, the widths W1 and W2 of the plurality of branch passages 123 of the supply side passage component 120 may be the same as each other. Here, the plurality of branch passages 123 may be passage portions facing the channel component 130.

[0106] The channel member 130 may have one side portion connected to the supply side passage member 120, and may be provided with a plurality of channels 131 through which carbon dioxide and electrolyte as the raw material fluid to be supplied flow. In addition, when the channel member 130 faces the electrode E and the plurality of channels 131 are provided on the surface of the channel member 130 facing the electrode E, the raw material fluid flowing through the plurality of channels 131 contacts the electrode E, and an electrochemical reaction occurs in the electrode E.

[0107] The channel 130 may have a width of, for example, 100 cm 2 Therefore, the electrolytic cell 1000 according to an embodiment of the present invention may have an area of ​​100 cm 2 or larger active area.

[0108] In addition, the passage plate 100 may be provided in plural, and the plural passage plates 100 may face the anode A and the cathode C, respectively.

[0109] The plurality of passage plates 100 may include a first passage plate P1 facing the anode A and a second passage plate P2 facing the cathode C.

[0110] Here, each of the passage plates 100, 200, and 300 for the electrolytic cell according to the above-mentioned first to third embodiments may include at least one of the first passage plate P1 or the second passage plate P2. Here, as a specific example, each of the passage plates 100, 200, and 300 for the electrolytic cell according to the above-mentioned first to third embodiments may be the first passage plate P1, but the present invention is not necessarily limited thereto. Each of the passage plates 100, 200, and 300 may be the second passage plate P2, or the first passage plate P1 and the second passage plate P2. (See Figure 2 , Figure 4 and Figure 6 . )

[0111] An ion exchange membrane (IEM) I may be disposed between the anode A and the cathode C. Here, ions may move between the anode A and the cathode C through the ion exchange membrane I.

[0112] In the electrolytic cell 1000 according to the embodiment of the present invention, the first passage plate P1, the anode A, the ion exchange membrane I, the cathode C, and the second passage plate P2 may be sequentially stacked.

[0113] <Manufacturing Example 1>

[0114] A passage plate of an electrolytic cell for electrolyzing carbon dioxide (CO2) by an electrochemical reduction reaction is manufactured. The passage plate is arranged to face an electrode in which the electrochemical reduction reaction occurs.

[0115] The passage plate is manufactured to include a supply side passage part, in which a passage for supplying carbon dioxide and electrolyte is provided, the passage being branched into a plurality of branch passages by a plurality of passage blocks, and a channel part having one side portion connected to the supply side passage part, and in which a plurality of passages through which the supplied carbon dioxide and electrolyte flow are provided. Here, the plurality of branch passages are manufactured so that their respective widths are uniform.

[0116] The passage plate is manufactured to also include: a manifold inlet, which is connected to the supply side passage component and into which carbon dioxide and electrolyte flow; an exhaust side passage component, which is connected to the other side portion of the channel component and in which the reactants are discharged through multiple channels; and a manifold outlet, which is connected to the exhaust side passage component.

[0117] Each of the passage blocks is manufactured to have a circular cross section, and the plurality of branch passages of the supply-side passage member are manufactured so that the number and positions thereof correspond to the number and positions of the plurality of passages of the channel member.

[0118] <Manufacturing Example 2>

[0119] A passage plate for an electrolytic cell is manufactured the same as that of Manufacturing Example 1 except that a plurality of passage blocks are arranged in two rows, the passage blocks are arranged to be misaligned between the rows, and the number of branch passages of the supply side passage component is set to be greater than the number of channels of the channel component.

[0120] <Manufacturing Example 3>

[0121] The passage plate for the electrolytic cell is manufactured the same as that of manufacturing example 1 except that: the passage block has a rhombus shape in cross section, the number of branch passages of the supply side passage component is set to be smaller than the number of channels of the channel component, and a groove is defined which is recessed inward from each of the two side portions of the supply side passage component, so that the width of each of the branch passages arranged at the two side portions of the supply side passage component is the same as the width of each of the other branch passages of the supply side passage component.

[0122] <Comparative Example 1>

[0123] A passage plate for an electrolytic cell is manufactured the same as that of manufacturing example 1 except that: the cross-section of the passage block has a rhombus shape, the number of branch passages of the supply side passage component is set to be smaller than the number of channels of the channel component, the respective widths of the plurality of branch passages are set to be uneven, and the width of each of the branch passages arranged at the two side portions of the supply side passage component is set to be larger than the width of each of the other branch passages of the supply side passage component.

[0124] <Experimental Example 1>

[0125] Figure 8 is an image illustrating a flow velocity distribution in a passage plate for an electrolytic cell according to Comparative Example 1. Fig. 9 is an image illustrating a flow velocity distribution in a passage plate for an electrolytic cell according to Manufacturing Example 1. Fig.10 is an image illustrating a flow velocity distribution in a passage plate for an electrolytic cell according to Manufacturing Example 2. Fig.11 is an image illustrating a flow velocity distribution in a passage plate for an electrolytic cell according to Manufacturing Example 3.

[0126] exist Figures 8 to 11 , images show fluid flow velocity distribution in the passage plate for an electrolytic cell according to Comparative Example 1 and Manufacturing Examples 1 to 3 during a process from allowing fluids of carbon dioxide and electrolyte to flow into a manifold inlet to discharging the fluids through a discharge-side outlet.

[0127] In addition, the deviations in the flow rate of the fluid in the channel member measured in Experimental Example 1 are shown in Table 1 below.

[0128]

Table 1

[0129] Comparative Example 1 Manufacturing Example 1 Manufacturing Example 2 Manufacturing Example 3 Flow rate deviation (%) 8.45 2.99 2.96 4.40

[0130] according to Figure 8 In the image of the flow velocity distribution in the channel part of the passage plate according to Comparative Example 1 shown in , the two side parts are represented by the shaded parts where the flow velocity is significantly fast, and the other parts are represented by the dark gray parts where the flow velocity is relatively slow. Therefore, it can be known that in Comparative Example 1, the flow velocity between the channels of the channel part is significantly uneven. In contrast, according to Fig. 9 The access plate according to the manufacturing example 1 shown in Fig.10 The access plate according to Manufacturing Example 2 shown in FIG. Fig.11 , the flow velocity indicated in light gray in the two side parts and other parts is uniform. Therefore, it can be known that in manufacturing examples 1 to 3, the flow velocity between the channels of the channel component is significantly uniform. Therefore, it can be known that in comparative example 1, the shape and arrangement of the channel block branching out the channel are uneven, so that the flow rate is biased toward some channels set at the two edges, and it can be known that in manufacturing examples 1 to 3, the shape and arrangement of the channel block branching out the channel are uniform, so that the flow rate in all channels is uniform, and the flow rate is not biased toward some channels.

[0131] In addition, referring to Table 1, it can be known that in the flow rate deviation (%), Comparative Example 1 has a deviation of 8.45, which is large, while Manufacturing Examples 1, 2 and 3 show deviations of 2.99, 2.96 and 4.40, respectively, which are significantly small.

[0132] Therefore, compared with Comparative Example 1, Manufacturing Examples 1 and 2 can reduce the flow rate deviation between channels by 74%, and Manufacturing Example 3 can improve the flow rate deviation by 48%.

[0133] Therefore, it can be known that when compared with the passage plate for the electrolytic cell according to Comparative Example 1, the passage plate for the electrolytic cell according to Manufacturing Examples 1 to 3 can be significantly improved in the flow distribution of reactants and products necessary for electrolyzing carbon dioxide.

[0134] Although the present invention has been described in detail with reference to limited embodiments, these embodiments are intended to specifically describe the present invention, and the post-processing device according to the present invention is not limited thereto. Within the technical concept of the present invention, the present invention can be implemented in various ways by ordinary technicians in the field to which the present invention belongs.

[0135] Furthermore, the detailed protective scope of the present invention will be set forth by the accompanying claims.

[0136] Description of Reference Numerals

[0137] 100, 200, 300, 500: access board

[0138] 110: Manifold inlet

[0139] 120, 220, 320: Supply side passage components

[0140] 121, 221, 222, 321: access block

[0141] 123, 223, 323: branching pathways

[0142] 130: Channel components

[0143] 131: Channel

[0144] 131a: Channel protrusion

[0145] 140, 240, 340: Discharge side passage components

[0146] 141, 341: Discharge side passage block

[0147] 150: Manifold outlet

[0148] 320a: Groove

[0149] 1000: Electrolytic Cell

[0150] A: Anode

[0151] C: cathode

[0152] E: Electrode

[0153] I: Ion exchange membrane

[0154] P1: First access board

[0155] P2: Second channel board

Claims

1. A passage plate for an electrolytic cell, the passage plate facing an electrode configured to cause an electrochemical reaction, the passage plate comprising: a supply-side passage member in which a branch passage is provided, the branch passage being branched into a plurality of passages through which a raw material fluid is supplied; as well as a channel member having one side portion connected to the supply-side passage member and having a plurality of channels provided therein through which a supplied raw material fluid flows, Wherein, the supply side passage component comprises a plurality of passage blocks, A plurality of said branch paths branch out through said plurality of path blocks, and The widths of the plurality of branch paths are uniform.

2. The access plate according to claim 1, wherein: The channel member faces the electrode, wherein the plurality of channels are provided on a surface of the channel member facing the electrode, so that the raw material fluid flowing through the plurality of channels contacts the electrode and an electrochemical reaction occurs in the electrode.

3. The access plate according to claim 1, wherein: The number of the plurality of branch passages of the supply-side passage member corresponds to the number of the plurality of channels.

4. The access plate according to claim 1, wherein: Positions of the plurality of branch passages of the supply-side passage member and positions of the plurality of passages of the passage member are arranged to correspond to each other.

5. The access plate according to claim 1, wherein Each of the plurality of passage blocks has a circular cross-section.

6. The access plate according to claim 5, wherein: The plurality of passage blocks are arranged in a plurality of rows, The plurality of via blocks arranged in a plurality of rows are configured to be misaligned with each other between rows.

7. The access plate according to claim 1, wherein: Each of the plurality of passage blocks has a non-circular cross-section.

8. The access plate according to claim 1, wherein: The width of each of the branch passages provided at both side portions of the supply-side passage member is set to be the same as the width of each of the other passages of the supply-side passage member.

9. The passage plate according to claim 1, further comprising a manifold inlet connected to the supply-side passage member and into which the raw material fluid flows, in, The supply-side passage member supplies the raw material fluid flowing out from the manifold inlet.

10. The access plate according to claim 1, wherein The access plate further comprises: a discharge-side passage member connected to the other side portion of the channel member and provided with a plurality of branch passages through which reactants are discharged; and A manifold outlet is connected to the discharge-side passage member.

11. The access plate according to claim 10, wherein: The discharge-side passage member has a shape corresponding to a shape of the supply-side passage member.

12. The access plate according to claim 1, wherein The plurality of passages are arranged in a straight line so that the raw material fluid flows from one side portion where the supply-side passage member is provided to the other side portion in a straight line direction.

13. The access plate according to claim 1, wherein The raw material fluid includes carbon dioxide (CO 2 ) and an electrolyte containing water (H 2 O), so that the carbon dioxide is electrolyzed in the electrode through an electrochemical reduction reaction.

14. An electrolytic cell comprising: An access plate for the electrolytic cell according to any one of claims 1 to 13; as well as The electrode faces the via plate.

15. The electrolytic cell according to claim 14, wherein The electrodes include an anode and a cathode, The passage plates are provided in plurality, and the plurality of passage plates face the anode and the cathode respectively, and The electrolytic cell also includes an ion exchange membrane (IEM) disposed between the anode and the cathode.

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