Pendulum type electrolysis device

Abstract

The invention provides a pendulum type electrolysis device which comprises a first electrolytic tank, a flow field plate and a second electrolytic tank, the flow field plate is arranged between the first electrolytic tank and the second electrolytic tank, and a flow channel is formed in the flow field plate; the first electrolytic tank comprises a first electrolytic chamber, a first working electrode, a first counter electrode and a first ion exchange membrane, an inner cavity of the first electrolytic chamber is divided into a first chamber and a second chamber by the first ion exchange membrane, and the second chamber is communicated with the runner; the second electrolytic tank comprises a second electrolytic chamber, a second working electrode, a second counter electrode and a second ion exchange membrane, an inner cavity of the second electrolytic chamber is divided into a third chamber and a fourth chamber by the second ion exchange membrane, and the third chamber is communicated with the runner; one of the first ion exchange membrane and the second ion exchange membrane is a proton exchange membrane, and the other one is an anion exchange membrane. The pendulum type electrolysis device can improve the conversion rate of electrochemical reaction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrolytic cell, in particular to a pendulum type electrolytic device. BACKGROUND

[0002] At present, efficient utilization of intermittent renewable energy through efficient energy storage and conversion technology is considered as a key technology for efficient energy utilization. Among them, the electric energy converted by renewable energy such as wind energy, tidal energy or solar energy can convert conventional substances such as water, nitrogen and carbon dioxide in the earth into high value-added chemicals under mild conditions, thereby completing efficient resource recycling, which is considered as one of the important ways to solve the energy shortage problem in the future.

[0003] Compared with traditional industrial processes, electrochemical reaction system is an important part of new energy system because it is green and environmentally friendly, which is conducive to the sustainable development of human society. The design of various excellent electrocatalysts and the research of related reaction mechanisms greatly expand people's understanding and application of the field of electrocatalysis. In addition to the design of electrocatalysts, the design of device structure can also optimize the overall electrochemical reaction performance, and realize the transformation of electrochemical reaction system from laboratory to industrial application.

[0004] At present, the commonly used reactors in the field of electrocatalysis include H-type electrolytic cell, liquid phase flow type electrolytic cell, membrane electrode reactor and solid state electrolyte reactor. The above electrolytic cells have been gradually improved in terms of working current density, electric energy loss, working stability and product separation. However, no matter which type of electrolytic cell is suitable for single electrochemical reduction reaction or single electrochemical oxidation reaction, the electrochemical reaction conversion rate of electrolytic cell has an upper limit, and there is still a big gap from industrial application. SUMMARY

[0005] Therefore, the present application provides a pendulum type electrolytic device which can improve the electrochemical reaction conversion rate.

[0006] The technical scheme provided by the present application is as follows:

[0007] According to one aspect of the present application, a pendulum type electrolytic device is provided, comprising a first electrolytic cell, a flow field plate and a second electrolytic cell, the flow field plate is arranged between the first electrolytic cell and the second electrolytic cell, and the flow field plate has a flow channel for the flow of electrolyte;

[0008] The first electrolytic cell comprises a first electrolytic chamber, a first working electrode, a first counter electrode and a first ion exchange membrane arranged in the first electrolytic chamber, the first ion exchange membrane separates the inner cavity of the first electrolytic chamber into a first cavity and a second cavity, the second cavity is communicated with the flow channel, the first working electrode is arranged in the second cavity, and the first counter electrode is arranged in the first cavity.

[0009] The second electrolytic cell comprises a second electrolytic chamber, a second working electrode, a second counter electrode and a second ion exchange membrane arranged in the second electrolytic chamber, the second ion exchange membrane separates the inner cavity of the second electrolytic chamber into a third cavity and a fourth cavity, the third cavity is communicated with the flow channel, the second working electrode is arranged in the third cavity, and the second counter electrode is arranged in the fourth cavity.

[0010] One of the first ion exchange membrane and the second ion exchange membrane is a proton exchange membrane, and the other is an anion exchange membrane.

[0011] In any embodiment, the flow channel penetrates through the flow field plate and communicates with the second cavity and the third cavity in the thickness direction of the flow field plate.

[0012] In any embodiment, the flow channel is arranged in a serpentine shape on the flow field plate.

[0013] In any embodiment, the first electrolytic cell further comprises a first end plate and a first supporting electrolyte cavity plate, the first supporting electrolyte cavity plate is provided with a first supporting electrolyte containing cavity penetrating through the two side walls of the first supporting electrolyte cavity plate, the first end plate, the first supporting electrolyte cavity plate and the flow field plate are sequentially stacked and connected to form the first electrolytic chamber; the first ion exchange membrane is arranged between the first supporting electrolyte cavity plate and the flow field plate, the first working electrode is arranged between the first ion exchange membrane and the flow field plate, and the first counter electrode is arranged in the first supporting electrolyte containing cavity.

[0014] In any embodiment, the first electrolytic cell further comprises a first working electrode catalytic layer, the first working electrode catalytic layer is arranged between the flow field plate and the first ion exchange membrane, and is used for catalyzing the electrode reaction on the first working electrode.

[0015] In any embodiment, the first electrolytic cell further comprises a first counter electrode catalytic layer, the first end plate is provided with a first catalyst containing cavity close to the first supporting electrolyte cavity plate, the first counter electrode catalytic layer is arranged in the first catalyst containing cavity, and the first counter electrode catalytic layer is used for catalyzing the electrode reaction on the first counter electrode.

[0016] In any of the embodiments, the second electrolytic cell further comprises a second end plate and a second supporting electrolyte cavity plate, the second supporting electrolyte cavity plate is provided with a second supporting electrolyte containing cavity penetrating through the two side walls of the second supporting electrolyte cavity plate, the second end plate, the second supporting electrolyte cavity plate and the flow field plate are sequentially stacked and connected to form the second electrolytic chamber; the second ion exchange membrane is arranged between the second supporting electrolyte cavity plate and the flow field plate, the second working electrode is arranged between the second ion exchange membrane and the flow field plate, and the second counter electrode is arranged in the second supporting electrolyte containing cavity.

[0017] In any of the embodiments, the second electrolytic cell further comprises a second working electrode catalytic layer, the second working electrode catalytic layer is arranged between the flow field plate and the second ion exchange membrane, and is used for catalyzing the electrode reaction on the second working electrode.

[0018] In any of the embodiments, the second electrolytic cell further comprises a second counter electrode catalytic layer, the second end plate is provided with a second catalyst containing cavity on the side close to the second supporting electrolyte cavity plate, the second counter electrode catalytic layer is arranged in the second catalyst containing cavity, and the second counter electrode catalytic layer is used for catalyzing the electrode reaction on the second counter electrode.

[0019] In any of the embodiments, the first end plate, the first supporting electrolyte cavity plate and the flow field plate are all provided with a first electrolyte inlet corresponding in position and a first electrolyte outlet corresponding in position, and the first electrolyte inlet and the first electrolyte outlet are respectively connected to communicate with the two ends of the flow channel.

[0020] And / or, the second end plate, the second supporting electrolyte cavity plate and the flow field plate are all provided with a second electrolyte inlet corresponding in position and a second electrolyte outlet corresponding in position, and the second electrolyte inlet and the second electrolyte outlet are respectively connected to communicate with the two ends of the flow channel.

[0021] Compared with the prior art, the application has at least the following beneficial effects:

[0022] By setting the first electrolytic cell and the second electrolytic cell, and making the first electrolytic cell and the second electrolytic cell share the flow channel on the flow field plate; setting the first working electrode in the first electrolytic cell in the second chamber which is in communication with the flow channel; setting the second working electrode in the second electrolytic cell in the third chamber which is in communication with the flow channel; and one of the first ion exchange membrane and the second ion exchange membrane is a proton exchange membrane, and the other is an anion exchange membrane; the first electrolytic cell and the second electrolytic cell can respectively carry out an electrochemical single reaction (such as an electrochemical reduction reaction or an electrochemical oxidation reaction). For some specific electrochemical reactions (such as the reaction of electrochemically coupling to prepare urea), the above-mentioned pendulum electrolysis device can be used to pendulum cyclically and alternately carry out the co-reduction reaction of CO2 and NO x in the first electrolytic cell and the co-oxidation reaction of CO and NH3 in the second electrolytic cell; the reaction by-product of the first electrolytic cell can be used as the reaction raw material of the second electrolytic cell, and the reaction by-product of the second electrolytic cell can be used as the reaction raw material of the first electrolytic cell. The above-mentioned reaction carried out by using the pendulum electrolysis device of the present application can greatly improve the conversion rate of the electrochemical reaction. BRIEF DESCRIPTION OF DRAWINGS

[0023] For better describing and illustrating the embodiments or examples provided by the present application, one or more drawings can be referred to. The additional details or examples used for describing the drawings should not be considered as limiting the scope of any one of the disclosed applications, the presently described embodiments or examples, and the best mode presently understood of these applications. Moreover, the same reference numerals are used to represent the same components throughout the drawings. In the drawings:

[0024] Figure 1 is an exploded schematic view of the pendulum electrolysis device of an embodiment of the present application;

[0025] Figure 2 is a schematic view of the first end plate in the pendulum electrolysis device of an embodiment of the present application;

[0026] Figure 3 is a schematic view of the first supporting electrolyte cavity plate in the pendulum electrolysis device of an embodiment of the present application;

[0027] Figure 4 is a schematic view of the flow field plate in the pendulum electrolysis device of an embodiment of the present application.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 10, pendulum electrolysis device; 11, first electrolytic cell; 12, flow field plate; 13, second electrolytic cell;

[0030] 112, first working electrode; 114, first ion exchange membrane; 115, first counter electrode catalyst layer; 116, first gasket; 1111, first end plate; 1112, first supporting electrolyte cavity plate; 1113, first electrolyte inlet; 1114, first electrolyte outlet; 1111a, first catalyst containing cavity; 1112a, first supporting electrolyte containing cavity;

[0031] 121, flow channel;

[0032] 132, second working electrode; 134, second ion exchange membrane; 135, second counter electrode catalyst layer; 136, second gasket; 1311, second end plate; 1312, second supporting electrolyte cavity plate; 1313, second electrolyte inlet; 1314, second electrolyte outlet; 1311a, second catalyst containing cavity; 1312a, second supporting electrolyte containing cavity. DETAILED DESCRIPTION

[0033] In order to make the above objectives, features and advantages of the present application more clear and easily understood, the specific embodiments of the present application are described in detail below. In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than the embodiments described herein, and one of ordinary skill in the art can make similar improvements without departing from the spirit of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0034] In addition, the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0035] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0037] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , an embodiment of the present application provides a pendulum electrolysis device 10, the pendulum electrolysis device 10 includes a first electrolysis cell 11, a flow field plate 12 and a second electrolysis cell 13, the flow field plate 12 is arranged between the first electrolysis cell 11 and the second electrolysis cell 13, and the flow field plate 12 is provided with a flow channel 121 for electrolyte flow. Wherein, the first electrolysis cell 11 includes a first electrolysis chamber (not shown in the figure) and a first working electrode 112, a first counter electrode (not shown in the figure) and a first ion exchange membrane 114 arranged in the first electrolysis chamber, the first ion exchange membrane 114 divides the inner cavity of the first electrolysis chamber into a first chamber (not shown in the figure) and a second chamber (not shown in the figure), the second chamber is communicated with the flow channel 121, the first working electrode 112 is arranged in the second chamber, and the first counter electrode is arranged in the first chamber. The second electrolysis cell 13 includes a second electrolysis chamber (not shown in the figure) and a second working electrode 132, a second counter electrode (not shown in the figure) and a second ion exchange membrane 134 arranged in the second electrolysis chamber, the second ion exchange membrane 134 divides the inner cavity of the second electrolysis chamber into a third chamber (not shown in the figure) and a fourth chamber (not shown in the figure), the third chamber is communicated with the flow channel 121, the second working electrode 132 is arranged in the third chamber, and the second counter electrode is arranged in the fourth chamber. And one of the first ion exchange membrane 114 and the second ion exchange membrane 134 is a proton exchange membrane, and the other is an anion exchange membrane.

[0038] The pendulum electrolysis device 10 described above, by arranging the first electrolysis cell 11 and the second electrolysis cell 13, and making the first electrolysis cell 11 and the second electrolysis cell 13 share the flow channel 121 on the flow field plate 12; arranging the first working electrode 112 in the first electrolysis cell 11 in the second chamber communicated with the flow channel 121; arranging the second working electrode 132 in the second electrolysis cell 13 in the third chamber communicated with the flow channel 121; and one of the first ion exchange membrane 114 and the second ion exchange membrane 134 is a proton exchange membrane, and the other is an anion exchange membrane; the first electrolysis cell 11 and the second electrolysis cell 13 can respectively carry out an electrochemical single reaction (electrochemical reduction reaction or electrochemical oxidation reaction). For some specific electrochemical reactions, using the pendulum electrolysis device 10 described above, the raw materials of the reaction are subjected to pendulum reaction in the first electrolysis cell 11 and the second electrolysis cell 13, which can effectively improve the total conversion rate of the electrochemical reaction.

[0039] Specifically, the specific electrochemical reaction includes the reaction of preparing urea by electrochemical coupling of CO2 and nitrate / nitrite (NO x ). When the pendulum electrolysis device 10 of the present application is used to electrochemically couple the solution containing CO2 and nitrate / nitrite to prepare urea, the electrolyte containing CO2 and nitrate / nitrite is passed into the flow channel 121 of the flow field plate 12, the first working electrode 112 is connected to the negative electrode of the power supply as the cathode, the first counter electrode 113 is connected to the positive electrode of the power supply as the anode, and the first ion exchange membrane 114 is a proton exchange membrane. At this time, the co-reduction reaction of CO2 and NO x is carried out in the flow channel 121 and the second chamber to obtain the reaction product urea, and the by-products CO and NH3 are generated; when it is detected that the conversion rate of NO x is unchanged, the single reaction in the first electrolytic cell 11 ends. Instead, the second working electrode 132 is connected to the positive electrode of the power supply as the anode, the second counter electrode is connected to the negative electrode of the power supply as the cathode, and the second ion exchange membrane 134 is an anion exchange membrane. At this time, the co-oxidation reaction of CO and NH3 is carried out in the flow channel 121 and the third chamber to obtain the reaction product urea, and the by-products CO2 and NO x are generated; when it is detected that the conversion rate of NH3 is unchanged, the single reaction in the second electrolytic cell 13 ends.

[0040] In this way, the co-reduction reaction of CO2 and NO x and the co-oxidation reaction of CO and NH3 are alternately carried out in the first electrolytic cell 11 and the second electrolytic cell 13 in a pendulum manner; the by-products of the reaction in the first electrolytic cell 11 are used as the raw materials for the reaction in the second electrolytic cell 13, the by-products of the reaction in the second electrolytic cell 13 are used as the raw materials for the reaction in the first electrolytic cell 11, and the process is repeated, which greatly improves the conversion rate of the total electrochemical reaction.

[0041] It should be noted that the main role of the supporting electrolyte in the first chamber of the first electrolytic cell 11 is to maintain the charge balance of the electrochemical reaction in the first electrolytic cell 11 and form a current path; similarly, the main role of the supporting electrolyte in the fourth chamber of the second electrolytic cell 13 is to maintain the charge balance of the electrochemical reaction in the second electrolytic cell 13 and form a current path. Specifically, the supporting electrolyte can be a potassium hydroxide solution.

[0042] It can be understood that when the pendulum electrolysis device 10 of the present application is used to carry out the co-reduction reaction of CO2 and NO xCO and NH3, the first working electrode 112 and the first counter electrode are connected to the positive and negative of the power supply in reverse, the second working electrode 132 and the second counter electrode are connected to the positive and negative of the power supply in reverse, and the first ion exchange membrane 114 and the second ion exchange membrane 134 are exchanged. The materials of the first working electrode 112 and the second working electrode 132 can be set according to the type of reaction to be performed. For example, when the co-reduction reaction of CO2 and NO x is performed in the first electrolytic cell 11, the first working electrode 112 can be a titanium dioxide electrode; when the co-oxidation reaction of CO and NH3 is performed in the second electrolytic cell 13, the second working electrode 132 can be a platinum-carbon electrode.

[0043] In some embodiments, the flow channel 121 extends through the flow field plate 12 in the thickness direction of the flow field plate 12 and communicates with the second chamber and the third chamber. In this way, the flow channel 121 communicates with the second chamber and the third chamber on two sides of the flow field plate 12, respectively, and the electrolyte in the flow channel 121 can enter the second chamber and the third chamber from the sides of the flow channel 121 when flowing in the flow channel 121, and the corresponding electrochemical reduction reaction or electrochemical oxidation reaction can be performed in the flow channel 121 and the second chamber and the third chamber.

[0044] In some embodiments, the flow channel 121 is arranged in a serpentine shape on the flow field plate 12. In this way, the residence time of the electrolyte in the flow channel 121 can be increased, the reaction raw materials in the electrolyte have more sufficient time to participate in the electrode reaction, and the mass transfer efficiency can be improved and the fluid flow can be enhanced, thereby facilitating further improvement of the conversion rate of the electrochemical reaction.

[0045] In some embodiments, the first electrolytic cell 11 further includes a first end plate 1111 and a first supporting electrolyte chamber plate 1112, the first supporting electrolyte chamber plate 1112 is provided with a first supporting electrolyte containing chamber 1112a extending through the two side walls of the first supporting electrolyte chamber plate 1112, the first end plate 1111, the first supporting electrolyte chamber plate 1112 and the flow field plate 12 are sequentially stacked and connected to form a first electrolytic chamber; the first ion exchange membrane 114 is arranged between the first supporting electrolyte chamber plate 1112 and the flow field plate 12, the first working electrode 112 is arranged between the first ion exchange membrane 114 and the flow field plate 12, and the first counter electrode is arranged in the first supporting electrolyte containing chamber 1112a.

[0046] Thus, the first electrolysis chamber is formed by stacking and connecting the first end plate 1111, the first electrolyte cavity support plate 1112 and the flow field plate 12 in sequence; the first ion exchange membrane 114 is arranged between the first electrolyte cavity support plate 1112 and the flow field plate 12, and separates the inner cavity of the first electrolysis chamber into a first cavity and a second cavity. The first electrolysis cell 11 has a simple and compact structure. It can be understood that the first end plate 1111, the first electrolyte cavity support plate 1112 and the flow field plate 12 can be connected by bolts, and sealing glue can be coated on the abutting sides of the adjacent plates for sealing connection. The first electrolyte cavity support plate 1112a is used to hold the supporting electrolyte, which is used to maintain the charge balance in the first electrolysis chamber.

[0047] In some embodiments, the first electrolysis cell 11 further comprises a first working electrode catalytic layer (not shown in the figure), which is arranged between the flow field plate 12 and the first ion exchange membrane 114 and is used to catalyze the electrode reaction on the first working electrode 112. By arranging the first working electrode catalytic layer, the reaction efficiency and conversion rate can be further improved. Specifically, when the co-reduction reaction of CO2 and NO x is carried out in the first electrolysis cell 11, the first working electrode catalytic layer can be foamed copper; when the co-oxidation reaction of CO and NH3 is carried out in the first electrolysis cell 11, the first working electrode catalytic layer can be foamed nickel.

[0048] In some embodiments, the first electrolysis cell 11 further comprises a first counter electrode catalytic layer 115, and the first end plate 1111 is provided with a first catalyst containing cavity 1111a on the side close to the first electrolyte cavity support plate 1112. The first counter electrode catalytic layer 115 is arranged in the first catalyst containing cavity 1111a, and the first counter electrode catalytic layer 115 is used to catalyze the electrode reaction on the first counter electrode. The first counter electrode catalytic layer 115 is beneficial to further promote the electrochemical reaction. Specifically, the first counter electrode catalytic layer 115 can be a commercial titanium mesh loaded with catalyst.

[0049] In some embodiments, the second electrolysis cell 13 further comprises a second end plate 1311 and a second electrolyte cavity support plate 1312, the second electrolyte cavity support plate 1312 is provided with a second electrolyte containing cavity 1312a penetrating through the two side walls of the second electrolyte cavity support plate 1312, and the second end plate 1311, the second electrolyte cavity support plate 1312 and the flow field plate 12 are stacked and connected in sequence to form a second electrolysis chamber; the second ion exchange membrane 134 is arranged between the second electrolyte cavity support plate 1312 and the flow field plate 12, the second working electrode 132 is arranged between the second ion exchange membrane 134 and the flow field plate 12, and the second counter electrode is arranged in the second electrolyte containing cavity 1312a.

[0050] Thus, the second electrolysis chamber is formed by stacking and connecting the second end plate 1311, the second support electrolyte cavity plate 1312 and the flow field plate 12 in sequence; the second ion exchange membrane 134 is arranged between the second support electrolyte cavity plate 1312 and the flow field plate 12, and separates the inner cavity of the second electrolysis chamber to form a third cavity and a fourth cavity. The second electrolysis cell 13 has a simple and compact structure. It can be understood that the second end plate 1311, the second support electrolyte cavity plate 1312 and the flow field plate 12 can be connected by bolts, and sealing glue can be coated on the abutting sides of the adjacent plates for sealing connection. The second support electrolyte cavity is used to hold the supporting electrolyte, which is used to maintain the charge balance in the second electrolysis chamber.

[0051] In some embodiments, the second electrolysis cell 13 further comprises a second working electrode catalytic layer (not shown in the figure), which is arranged between the flow field plate 12 and the second ion exchange membrane 134 and is used to catalyze the electrode reaction on the second working electrode 132. By arranging the second working electrode catalytic layer, the reaction efficiency and conversion rate can be further improved. Specifically, when the co-reduction reaction of CO2 and NO x is carried out in the second electrolysis cell 13, the second working electrode catalytic layer can be a copper foam; when the co-oxidation reaction of CO and NH3 is carried out in the second electrolysis cell 13, the second working electrode catalytic layer can be a nickel foam.

[0052] In some embodiments, the second electrolysis cell 13 further comprises a second counter electrode catalytic layer 135, and the second end plate 1311 is provided with a second catalyst containing cavity 1311a on the side close to the second support electrolyte cavity plate 1312. The second counter electrode catalytic layer 135 is arranged in the second catalyst containing cavity 1311a, and the second counter electrode catalytic layer 135 is used to catalyze the electrode reaction on the second counter electrode 133. The second counter electrode catalytic layer 135 is beneficial to further promote the electrochemical reaction. Specifically, the second counter electrode catalytic layer 135 can be a commercial titanium mesh loaded with catalyst.

[0053] In some embodiments, the first end plate 1111, the first support electrolyte cavity plate 1112 and the flow field plate 12 are each provided with a first electrolyte inlet 1113 corresponding in position and a first electrolyte outlet 1114 corresponding in position, and the first electrolyte inlet 1113 and the first electrolyte outlet 1114 are respectively connected with both ends of the flow channel 121.

[0054] Thus, electrolyte can be introduced into the flow channel 121 through the first electrolyte inlet 1113, and the electrochemical reaction can be carried out in the first electrolytic cell 11, and the electrolyte in the flow channel 121 can be discharged through the first electrolyte outlet 1114. The electrolyte can be allowed to carry out the electrochemical reaction in the flowing state. Understandably, valves can be provided to control the electrolyte entering the flow channel 121 from the first electrolyte inlet 1113 and the second electrolyte inlet 1313, and the electrolyte can be discharged through the first electrolyte outlet 1114 and the second electrolyte outlet 1314 by setting the valves.

[0055] In some embodiments, a first gasket 116 having a through inner cavity in the middle can also be provided between the first end plate 1111 and the first supporting electrolyte cavity plate 1112, between the first supporting electrolyte cavity plate 1112 and the first working electrode 112, and between the first working electrode 112 and the flow field plate 12. Similarly, a second gasket 136 having a through inner cavity in the middle can also be provided between the second end plate 1311 and the second supporting electrolyte cavity plate 1312, between the second supporting electrolyte cavity plate 1312 and the second working electrode 132, and between the second working electrode 132 and the flow field plate 12.

[0056] The through inner cavity of the first gasket 116 can be part of the first electrolytic chamber, and the through inner cavity of the second gasket 136 can be part of the second electrolytic chamber. The first gasket 116 also has a first electrolyte inlet 1113 corresponding to the position of the first electrolyte inlet 1113 on the first end plate 1111, the first supporting electrolyte cavity plate 1112 and the flow field plate 12, and a first electrolyte outlet 1114 corresponding to the position of the first electrolyte outlet 1114 in the above structure.

[0057] The technical features of the above-described embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present application.

[0058] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be noted that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these are within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims, and the description and drawings can be used to explain the content of the claims.

Claims

1. A pendulum-type electrolysis device, characterized in that, It includes a first electrolytic cell, a flow field plate, and a second electrolytic cell. The flow field plate is disposed between the first electrolytic cell and the second electrolytic cell, and the flow field plate has a flow channel for the flow of electrolyte. The first electrolytic cell includes a first electrolytic chamber and a first working electrode, a first pair of electrodes and a first ion exchange membrane disposed in the first electrolytic chamber. The first ion exchange membrane divides the inner cavity of the first electrolytic chamber into a first chamber and a second chamber. The second chamber is connected to the flow channel. The first working electrode is disposed in the second chamber and the first pair of electrodes is disposed in the first chamber. The second electrolytic cell includes a second electrolytic chamber and a second working electrode, a second pair of electrodes, and a second ion exchange membrane disposed within the second electrolytic chamber. The second ion exchange membrane divides the inner cavity of the second electrolytic chamber into a third chamber and a fourth chamber. The third chamber is connected to the flow channel. The second working electrode is disposed within the third chamber, and the second pair of electrodes is disposed within the fourth chamber. One of the first ion exchange membrane and the second ion exchange membrane is a proton exchange membrane, and the other is an anion exchange membrane.

2. The pendulum-type electrolysis device according to claim 1, characterized in that, Along the thickness direction of the flow field plate, the flow channel penetrates the flow field plate and communicates with the second chamber and the third chamber.

3. The pendulum-type electrolysis device according to claim 1, characterized in that, The flow channel is arranged in a serpentine bend on the flow field plate.

4. The pendulum-type electrolysis device according to any one of claims 1 to 3, characterized in that, The first electrolytic cell further includes a first end plate and a first supporting electrolyte chamber plate. The first supporting electrolyte chamber plate is provided with a first supporting electrolyte receiving cavity penetrating both side walls of the first supporting electrolyte chamber plate. The first end plate, the first supporting electrolyte chamber plate, and the flow field plate are stacked and connected in sequence to form the first electrolytic chamber. The first ion exchange membrane is disposed between the first supporting electrolyte chamber plate and the flow field plate. The first working electrode is disposed between the first ion exchange membrane and the flow field plate. The first pair of electrodes is disposed in the first supporting electrolyte receiving cavity.

5. The pendulum-type electrolysis device according to claim 4, characterized in that, The first electrolytic cell further includes a first working electrode catalytic layer, which is disposed between the flow field plate and the first ion exchange membrane and is used to catalyze the electrode reaction on the first working electrode.

6. The pendulum-type electrolysis device according to claim 4, characterized in that, The first electrolytic cell further includes a first pair of electrode catalytic layers. A first catalyst receiving cavity is provided on the side of the first end plate near the first supporting electrolyte chamber plate. The first pair of electrode catalytic layers are disposed in the first catalyst receiving cavity. The first pair of electrode catalytic layers are used to catalyze the electrode reactions on the first pair of electrodes.

7. The pendulum-type electrolysis device according to any one of claims 4, characterized in that, The second electrolytic cell further includes a second end plate and a second supporting electrolyte chamber plate. The second supporting electrolyte chamber plate is provided with a second supporting electrolyte receiving cavity that penetrates both sides of the second supporting electrolyte chamber plate. The second end plate, the second supporting electrolyte chamber plate, and the flow field plate are stacked and connected in sequence to form the second electrolytic chamber. The second ion exchange membrane is disposed between the second supporting electrolyte chamber plate and the flow field plate. The second working electrode is disposed between the second ion exchange membrane and the flow field plate. The second pair of electrodes is disposed in the second supporting electrolyte receiving cavity.

8. The pendulum-type electrolysis device according to claim 7, characterized in that, The second electrolytic cell further includes a second working electrode catalytic layer, which is disposed between the flow field plate and the second ion exchange membrane, and is used to catalyze the electrode reaction on the second working electrode.

9. The pendulum-type electrolysis device according to claim 7, characterized in that, The second electrolytic cell further includes a second pair of electrode catalytic layers. A second catalyst receiving cavity is provided on the side of the second end plate near the second supporting electrolyte chamber plate. The second pair of electrode catalytic layers are disposed in the second catalyst receiving cavity. The second pair of electrode catalytic layers are used to catalyze the electrode reactions on the second pair of electrodes.

10. The pendulum-type electrolysis device according to any one of claims 7 to 9, characterized in that, The first end plate, the first supporting electrolyte chamber plate, and the flow field plate are each provided with a first electrolyte inlet and a first electrolyte outlet at corresponding positions. The first electrolyte inlet and the first electrolyte outlet are respectively connected to the two ends of the flow channel.

Images