Water electrolysis test clamp and water electrolysis hydrogen production equipment

Abstract

The utility model provides an electrolyzed water test fixture and electrolyzed water hydrogen production equipment, which comprise an anode fixture, an anode electrode, a cathode fixture, a cathode electrode and an electrolytic tank diaphragm positioned between the anode fixture and the cathode fixture, the anode guide plate is fixedly installed in the groove of the anode clamping plate, the anode buffer wire mesh covers the anode guide plate, and the anode electrode is installed on the side, away from the anode guide plate, of the anode buffer wire mesh; the cathode clamp comprises a cathode clamping plate with a groove, a cathode guide plate and a cathode buffering silk screen, the cathode guide plate is fixedly installed in the groove of the cathode clamping plate, the cathode buffering silk screen covers the cathode guide plate, and the cathode electrode is installed on the side, away from the cathode guide plate, of the cathode buffering silk screen; and the anode electrode and the cathode electrode are oppositely arranged based on the electrolytic tank diaphragm. The embodiment of the utility model has the advantages of simple structure and simple assembly process, and can improve the electrolysis efficiency and prolong the service life of the electrode.

Description

Technical Field

[0001] This utility model relates to the field of water electrolysis technology, and in particular to an electrolysis water testing fixture and an electrolysis water hydrogen production device. Background Technology

[0002] Hydrogen energy is a clean energy source with advantages such as high energy density and zero emissions after combustion. Hydrogen can be produced by the electrolysis of water. However, the assembly of various parts in an electrolyzer is complex, and inaccurate electrode positioning can lead to uneven current distribution, affecting electrolysis efficiency and electrode lifespan. Utility Model Content

[0003] In view of the above problems, this utility model is proposed to provide an electrolysis water test fixture and an electrolysis water device that overcome or at least partially solve the above problems.

[0004] To address the aforementioned problems, in a first aspect, this utility model discloses an electrolysis water testing fixture, comprising: an anode fixture, an anode electrode, a cathode fixture, a cathode electrode, and an electrolysis cell diaphragm located between the anode fixture and the cathode fixture.

[0005] The anode clamp includes an anode clamp plate with a groove, an anode guide plate, and an anode buffer mesh. The anode guide plate is fixedly installed in the groove of the anode clamp plate, the anode buffer mesh covers the anode guide plate, and the anode electrode is installed on the side of the anode buffer mesh away from the anode guide plate.

[0006] The cathode clamp includes a cathode clamp plate with a groove, a cathode guide plate, and a cathode buffer mesh. The cathode guide plate is fixedly installed in the groove of the cathode clamp plate, the cathode buffer mesh covers the cathode guide plate, and the cathode electrode is installed on the side of the cathode buffer mesh away from the cathode guide plate.

[0007] The anode electrode and the cathode electrode are arranged opposite each other based on the diaphragm of the electrolytic cell.

[0008] Optionally, the anode clamp is made of polypropylene.

[0009] Optionally, the cathode clamp is made of polypropylene.

[0010] Optionally, the anode guide plate is a titanium plate.

[0011] Optionally, the cathode plate is a titanium plate.

[0012] Optionally, the anode buffer mesh is a nickel mesh.

[0013] Optionally, the cathode buffer mesh is a nickel mesh.

[0014] Optionally, the anode buffer mesh is the same size as the anode electrode, the cathode buffer mesh is the same size as the cathode electrode, and the anode electrode is the same size as the cathode electrode.

[0015] Optionally, the electrolytic cell diaphragm includes a diaphragm; the size of the diaphragm is larger than the size of the cathode electrode or the size of the anode electrode.

[0016] Optionally, the electrolytic cell membrane includes anion and cation exchange membranes; the size of the anion and cation exchange membranes is larger than the size of the cathode electrode or the size of the anode electrode.

[0017] Optionally, the anode clamp includes two identical anode sub-clamps, which are fixedly connected by bolts.

[0018] In a second aspect, this utility model discloses an electrolytic water hydrogen production device, comprising: an electrolytic cell and an electrolytic water testing fixture as described above; the electrolytic cell stores an electrolyte, and the electrolytic water testing fixture is at least partially immersed in the electrolyte.

[0019] Optionally, the electrolyte is an alkaline electrolyte.

[0020] This utility model has the following advantages:

[0021] This utility model embodiment comprises an anode clamp, an anode electrode, a cathode clamp, a cathode electrode, and an electrolytic cell diaphragm located between the anode clamp and the cathode clamp. The anode clamp includes an anode clamp plate with a groove, an anode guide plate, and an anode buffer mesh. The anode guide plate is fixedly installed in the groove of the anode clamp plate, and the anode buffer mesh covers the anode guide plate. The anode electrode is installed on the side of the anode buffer mesh away from the anode guide plate. The cathode clamp includes a cathode clamp plate with a groove, a cathode guide plate, and a cathode buffer mesh. The cathode guide plate is fixedly installed in the groove of the cathode clamp plate, and the cathode buffer mesh covers the cathode guide plate. The cathode electrode is installed on the side of the cathode buffer mesh away from the cathode guide plate. The anode electrode and the cathode electrode are arranged opposite to each other based on the electrolytic cell diaphragm. The anode or cathode section can be installed using its own clamping plate, guide plate, buffer mesh, and electrodes. During overall installation, the electrolytic cell diaphragm is placed between the opposite surfaces of the two electrodes. The overall structure is simple and the assembly process is straightforward. Furthermore, both the anode and cathode electrodes are fixed with corresponding clamping plates, guide plates, and buffer mesh, ensuring that the positions of the anode and cathode electrodes correspond and that the current distribution during electrolysis is uniform, thereby improving electrolysis efficiency and electrode lifespan. Attached Figure Description

[0022] Figure 1This is an exploded view of the structure of an electrolysis water testing fixture according to this utility model;

[0023] Figure 2 This is a cell voltage-current diagram of an electrolysis water testing fixture of this utility model under alkaline conditions.

[0024] Figure 3 This is a linear sweep voltammetric curve of the cathode hydrogen evolution reaction tested under alkaline conditions using an electrolysis water testing fixture of this utility model.

[0025] Figure 4 This is a linear sweep voltammetric curve of the anodic oxygen evolution reaction tested under alkaline conditions using an electrolysis water testing fixture of this utility model;

[0026] Figure 5 This is a cell voltage-current diagram of an electrolysis water test fixture of this utility model under neutral conditions.

[0027] Figure 6 This is a linear sweep voltammetric curve of the cathode hydrogen evolution reaction tested under neutral conditions using an electrolysis water testing fixture of this utility model.

[0028] Figure 7 This is a linear sweep voltammetric curve of the anodic oxygen evolution reaction under neutral conditions using an electrolysis water testing fixture of this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100 - Anode clamp, 110 - Anode clamp plate, 120 - Anode guide plate, 130 - Anode buffer wire mesh;

[0031] 200 - Anode electrode;

[0032] 300-Cathode clamp, 310-Cathode clamp plate, 320-Cathode guide plate, 330-Cathode buffer wire mesh;

[0033] 400 - Cathode electrode;

[0034] 500 - Electrolytic cell diaphragm. Detailed Implementation

[0035] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] The current heavy reliance on fossil fuels inevitably leads to serious environmental problems, necessitating the search for renewable and clean energy sources to replace them. Hydrogen energy is a clean energy source with advantages such as high energy density and zero emissions after combustion. Hydrogen production equipment via water electrolysis requires simple specifications, readily available raw materials, mild operating conditions, and high safety. Currently, hydrogen produced through water electrolysis can be used in various fields, including transportation, power and heat supply, and industrial production.

[0037] Electrolysis of water to produce hydrogen is an electrochemical reaction (1-1). Water is introduced into the anode and cathode, and the water dissociates into oxygen and hydrogen under the action of electrical energy and a catalyst. Electrolysis of water to produce hydrogen includes reactions at both the anode and cathode: the hydrogen evolution reaction (HER) at the cathode and the oxygen evolution reaction (OER) at the anode.

[0038] H2O + energy →H2+ 1 / 2 O2 (1-1)

[0039] In water electrolysis hydrogen production equipment, the assembly of various parts in the electrolyzer is complex, and inaccurate electrode positioning can lead to uneven current distribution, affecting electrolysis efficiency and electrode lifespan. To at least partially solve this technical problem, this utility model embodiment is proposed.

[0040] Reference Figure 1 The diagram shows an exploded view of the structure of an electrolytic water testing fixture according to the present invention. The specific components of the electrolytic water testing fixture may include: an anode fixture 100, an anode electrode 200, a cathode fixture 300, a cathode electrode 400, and an electrolytic cell diaphragm 500 located between the anode fixture 100 and the cathode fixture 300.

[0041] The anode clamp 100 includes an anode clamping plate 110 with a groove, an anode guide plate 120, and an anode buffer mesh 130. The anode guide plate 120 is fixedly installed in the groove of the anode clamping plate 110, and the anode buffer mesh 130 covers the anode guide plate 120. The anode electrode 200 is installed on the side of the anode buffer mesh 130 away from the anode guide plate 120.

[0042] The cathode clamp 300 includes a cathode clamping plate 310 with a groove, a cathode guide plate 320, and a cathode buffer mesh 330. The cathode guide plate 320 is fixedly installed in the groove of the cathode clamping plate 310, and the cathode buffer mesh 330 covers the cathode guide plate 320. The cathode electrode 400 is installed on the side of the cathode buffer mesh 330 away from the cathode guide plate 320.

[0043] The anode electrode 200 and the cathode electrode 400 are arranged opposite to each other based on the electrolytic cell diaphragm 500.

[0044] In this embodiment of the invention, the water electrolysis test fixture may include an anode fixture 100, an anode electrode 200, a cathode fixture 300, a cathode electrode 400, and an electrolytic cell diaphragm 500. The anode fixture 100 is used to fix and hold the anode electrode 200. The cathode fixture 300 is used to fix and hold the cathode electrode 400. The anode fixture 100 and the cathode fixture 300 have similar structures, as do the anode electrode 200 and the cathode electrode 400. The electrolytic cell diaphragm 500 can be disposed between the anode fixture 100 and the cathode fixture 300, i.e., between the anode electrode 200 and the cathode electrode 400, for ion exchange, water management, and gas isolation, thereby improving the efficiency and stability of electrolysis.

[0045] The anode clamp 100 includes an anode clamping plate 110 with grooves, an anode guide plate 120, and an anode buffer wire mesh 130. The grooves in the anode clamping plate 110 can be located at the top, such as... Figure 1 The groove of the anode clamp 110 is located on the upper edge of the anode clamp 110. The anode guide plate 120 is fixedly installed in the groove of the anode clamp 110, and the anode guide plate 120 is secured by the groove of the anode clamp 110. The groove of the anode clamp 110 allows the anode clamp 110 and the anode guide plate 120 to fit together, thereby improving the overall sealing performance, conductivity, and electrolysis efficiency. The anode buffer mesh 130 can cover the surface of the anode guide plate 120. The elasticity of the anode buffer mesh 130 adjusts the position of the anode electrode 200 and the anode guide plate 120, allowing the anode electrode 200 to be aligned with the groove of the anode clamp 110, thus improving the fit between the anode electrode 200 and the anode clamp 100. The anode electrode 200 can be positioned on the side of the anode buffer mesh 130 away from the anode guide plate 120, so that the anode electrode 200 can be positioned opposite the electrolytic cell diaphragm 500.

[0046] Accordingly, the cathode clamp 300 includes a cathode clamping plate 310 with grooves, a cathode guide plate 320, and a cathode buffer wire mesh 330. The grooves of the cathode clamping plate 310 can be provided at the top, such as... Figure 1The cathode clamp 310 has a groove on its upper edge. The cathode guide plate 320 is fixedly installed in the groove of the cathode clamp 310, and is secured by the groove. The groove of the cathode clamp 310 allows the cathode guide plate 320 to fit snugly against the cathode guide plate 320, thus improving overall sealing, conductivity, and electrolysis efficiency. A cathode buffer mesh 330 can cover the surface of the cathode guide plate 320. The elasticity of the cathode buffer mesh 330 adjusts the position of the cathode electrode 400 and the cathode guide plate 320, ensuring the cathode electrode 400 is aligned with the groove of the cathode clamp 310, thereby improving the fit between the cathode electrode 400 and the cathode clamp 300. The cathode electrode 400 can be positioned on the side of the cathode buffer mesh 330 away from the cathode guide plate 320, allowing it to be positioned opposite the electrolytic cell diaphragm 500. The electrolytic cell diaphragm 500 is located between the anode electrode 200 and the cathode electrode 400, that is, the anode electrode 200 and the cathode electrode 400 are arranged opposite each other based on the electrolytic cell diaphragm 500, and hydrolysis is carried out under the isolation of the anode electrode 200 and the cathode electrode 400 by the electrolytic cell diaphragm 500.

[0047] This embodiment of the invention comprises an anode clamp 100, an anode electrode 200, a cathode clamp 300, a cathode electrode 400, and an electrolytic cell diaphragm 500 located between the anode clamp 100 and the cathode clamp 300. The anode clamp 100 includes an anode clamp plate 110 with a groove, an anode guide plate 120, and an anode buffer mesh 130. The anode guide plate 120 is fixedly installed in the groove of the anode clamp plate 110, and the anode buffer mesh 130 covers the anode guide plate 120. The anode electrode 200 is mounted on the anode buffer mesh. The wire mesh 130 is located on the side away from the anode guide plate 120; the cathode clamp 300 includes a cathode clamp plate 310 with a groove, a cathode guide plate 320, and a cathode buffer wire mesh 330. The cathode guide plate 320 is fixedly installed in the groove of the cathode clamp plate 310, and the cathode buffer wire mesh 330 covers the cathode guide plate 320. The cathode electrode 400 is installed on the side of the cathode buffer wire mesh 330 away from the cathode guide plate 320; the anode electrode 200 and the cathode electrode 400 are arranged opposite to each other based on the electrolytic cell diaphragm 500. The anode or cathode section can be installed using its own clamping plate, guide plate, buffer mesh, and electrodes. During overall installation, the electrolytic cell diaphragm 500 is placed between the opposite surfaces of the two electrodes. The overall structure is simple and the assembly process is straightforward. Furthermore, both the anode electrode 200 and the cathode electrode 400 are fixed with corresponding clamping plates, guide plates, and buffer meshes, ensuring that the positions of the anode electrode 200 and the cathode electrode 400 correspond and that the current distribution during electrolysis is uniform, thereby improving electrolysis efficiency and electrode lifespan.

[0048] In one embodiment of this utility model, the anode clamp 110 and the cathode clamp 310 are made of polypropylene.

[0049] The anode clamp 110 and cathode clamp 310 can be made of polypropylene. Utilizing the acid, alkali, and high-temperature resistance of polypropylene, it exhibits extremely strong chemical stability in acidic and alkaline electrolytes, is not easily corroded or degraded, and can maintain structural integrity for a long time, ensuring the safety and stability of the electrolyte system. During use, the anode clamp 110 and cathode clamp 310 are not easily deformed and can be reused, greatly saving costs. In one example of this invention, the anode clamp 110 and cathode clamp 310 can be made of a sheet material with a thickness of 1 mm, a length and width of 2 × 3 cm, and an exposed water contact area of ​​2 × 2 cm.

[0050] In one embodiment of this utility model, the anode guide plate 120 and the cathode guide plate 320 are titanium plates.

[0051] The anode guide plate 120 and cathode guide plate 320 can be made from cut titanium plates. When the titanium plate is immersed in the electrolyte, a layer of titanium oxide graphite film forms on the surface of the titanium plate, further enhancing its corrosion resistance and enabling it to work stably in the electrolyte for a long time without being damaged by corrosion. Furthermore, the titanium plate has high mechanical strength, capable of withstanding various stresses and pressures in the electrolyte working environment, ensuring the overall structural stability and reliability. In one example of this invention, the anode guide plate 120 and cathode guide plate 320 can be 1 mm thick, fitting snugly into the grooves of the corresponding clamping plates.

[0052] In one embodiment of this invention, the anode buffer mesh 130 and the cathode buffer mesh 330 are nickel meshes. The high conductivity of nickel meshes effectively reduces resistance losses during electrolysis and improves current efficiency. Furthermore, nickel meshes have high mechanical strength and strong corrosion resistance, enabling long-term stable operation in the electrolyte, extending equipment lifespan, and maintaining the integrity of the fixture structure.

[0053] Furthermore, the anode buffer mesh 130 has the same size as the anode electrode 200, the cathode buffer mesh 330 has the same size as the cathode electrode 400, and the anode electrode 200 has the same size as the cathode electrode 400. In one example of this invention, the dimensions of the anode buffer mesh 130 and the anode electrode 200, and the dimensions of the cathode buffer mesh 330 and the cathode electrode 400 are both 2.5 × 2.5 cm.

[0054] In one embodiment of the present invention, the electrolytic cell diaphragm 500 includes a membrane; the size of the membrane is larger than the size of the cathode electrode 400 or the anode electrode 200. The membrane acts as a physical barrier, separating the anode electrode 200 and the cathode electrode 400 in the electrolytic cell, preventing direct mixing of gases or products generated by the two electrodes, while allowing ions in the electrolyte to pass through, maintaining the charge balance of the electrolytic reaction. The larger size of the membrane compared to the cathode electrode 400 or the anode electrode 200 effectively prevents short circuits in the clamps. In one example of this invention, the size of the membrane is 3×3cm.

[0055] In one embodiment of the present invention, the electrolytic cell diaphragm 500 includes anion and cation exchange membranes; the size of the anion and cation exchange membrane is larger than the size of the cathode electrode 400 or the anode electrode 200. Anion and cation exchange membranes are thin films with selective ion conduction capabilities, allowing cations or anions to pass through while blocking ions of opposite charges, depending on the membrane's chemical properties. The larger size of the anion and cation exchange membrane compared to the cathode electrode 400 or the anode electrode 200 effectively prevents short circuits in the clamps. In one example of this invention, the size of the anion and cation exchange membrane is 3 × 3 cm.

[0056] In one embodiment of the present invention, the anode clamp 110 includes two identical anode sub-clamps, which are fixedly connected by bolts.

[0057] Both the anode clamp 110 and the cathode clamp 310 can clamp and fix the corresponding guide plate and buffer mesh using two corresponding sub-clamps, and then secure them with bolts. Correspondingly, during assembly, the following parts can be assembled sequentially to form the fixture: cathode clamp 310, cathode guide plate 320, cathode buffer mesh 330, cathode electrode 400, diaphragm or anion / cation exchange membrane, anode electrode 200, anode buffer mesh 130, anode guide plate 120, and anode clamp 110. The assembly process uses bolts to provide clamping force, and the parts are removable and reusable. Assembly and disassembly are simple and convenient.

[0058] Based on the above-mentioned water electrolysis test fixture, hydrogen production was carried out under different conditions:

[0059] In one case, the anode and cathode were made of nickel foam and Raney nickel, respectively, and the diaphragm was an Agfa Zirfon membrane. The fixture was assembled using the above assembly method. The fixture was then tested in an 80°C, 6M potassium hydroxide system, and the results were as follows: Figure 2 The cell voltage-current curve shown illustrates the change in cell voltage with current. The overpotential of cathode electrode 400 can be... Figure 3As shown, the circuit density increases with the change in potential. The overpotential of the anode electrode 200 can be... Figure 4 As shown, the circuit density increases with the change in potential.

[0060] In another scenario, the anode and cathode are made of commercially available platinum-carbon and iridium dioxide, respectively, and the membrane is a proton exchange membrane. The fixture is assembled using the method described above. The fixture is then tested in a 60°C deionized water system, yielding the following results: Figure 5 The cell voltage-current curve shown illustrates the change in cell voltage with current. The overpotential of cathode electrode 400 can be... Figure 6 As shown, the circuit density increases with the change in potential. The overpotential of the anode electrode 200 can be... Figure 7 As shown, the circuit density increases with the change in potential.

[0061] The utility model also discloses a hydrogen production device for water electrolysis, comprising: an electrolyzer and an electrolysis water testing fixture as described above; the electrolyzer stores an electrolyte, and the electrolysis water testing fixture is at least partially immersed in the electrolyte. The electrolyzer contains an electrolyte, and at least the electrode portion of the electrolysis water testing fixture is immersed in the electrolyte to conduct the reaction. The type of electrolyte can be determined according to requirements.

[0062] In one embodiment of this invention, the electrolyte is an alkaline electrolyte. Hydrogen gas is produced by electrolyzing the alkaline electrolyte. In one example, the alkaline electrolyte can be a potassium hydroxide solution.

[0063] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0064] The above provides a detailed description of the electrolysis water testing fixture and the electrolysis water hydrogen production equipment provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A water electrolysis testing fixture, characterized in that, include: An anode clamp, an anode electrode, a cathode clamp, a cathode electrode, and an electrolytic cell diaphragm located between the anode clamp and the cathode clamp. The anode clamp includes an anode clamp plate with a groove, an anode guide plate, and an anode buffer mesh. The anode guide plate is fixedly installed in the groove of the anode clamp plate, the anode buffer mesh covers the anode guide plate, and the anode electrode is installed on the side of the anode buffer mesh away from the anode guide plate. The cathode clamp includes a cathode clamp plate with a groove, a cathode guide plate, and a cathode buffer mesh. The cathode guide plate is fixedly installed in the groove of the cathode clamp plate, the cathode buffer mesh covers the cathode guide plate, and the cathode electrode is installed on the side of the cathode buffer mesh away from the cathode guide plate. The anode electrode and the cathode electrode are arranged opposite each other based on the diaphragm of the electrolytic cell.

2. The water electrolysis test fixture of claim 1, wherein, The anode clamp is made of polypropylene.

3. The water electrolysis test fixture of claim 1, wherein, The cathode clamp is made of polypropylene.

4. The water electrolysis test fixture of claim 1, wherein, The anode guide plate is a titanium plate.

5. The water electrolysis test fixture of claim 1, wherein, The cathode plate is a titanium plate.

6. The water electrolysis test fixture of claim 1, wherein, The anode buffer mesh is a nickel mesh.

7. The water electrolysis test fixture of claim 1, wherein, The cathode buffer mesh is a nickel mesh.

8. The water electrolysis test fixture of claim 1, wherein, The anode buffer mesh is the same size as the anode electrode, the cathode buffer mesh is the same size as the cathode electrode, and the anode electrode is the same size as the cathode electrode.

9. The water electrolysis test fixture of claim 1, wherein, The electrolytic cell diaphragm includes a diaphragm; the size of the diaphragm is larger than the size of the cathode electrode or the size of the anode electrode.

10. The water electrolysis test fixture of claim 1, wherein, The electrolytic cell membrane includes anion and cation exchange membranes; the size of the anion and cation exchange membranes is larger than the size of the cathode electrode or the size of the anode electrode.

11. The water electrolysis test fixture of claim 1, wherein, The anode clamp includes two identical anode sub-clamps, which are fixedly connected by bolts.

12. A water electrolysis hydrogen production device, characterized in that, include: Electrolyzer and water electrolysis test fixture as described in any one of claims 1-11; The electrolytic cell stores an electrolyte, and the electrolytic water test fixture is at least partially immersed in the electrolyte.

13. The water electrolysis hydrogen production apparatus according to claim 12, characterized in that, The electrolyte is an alkaline electrolyte.

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