Hydrogen evolution electrode for alkaline water hydrogen production electrolytic cell
The novel hydrogen electrode design with a porous nickel substrate and interwoven nickel wires addresses the low surface area issue of existing electrodes, enhancing hydrogen production efficiency by increasing contact area with the electrolyte.
Patent Information
- Application Number
- CN202421422456.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-06-20
AI Technical Summary
The specific surface area of the nickel wire mesh of the existing hydrogen evolution electrodes is small, resulting in low hydrogen production efficiency of the electrolytic cell.
A foam nickel matrix is used to interwoven with a plurality of first and second metal wires to form a mesh structure, increase the specific surface area, and a flat section and a metal particle layer are provided on the metal wire to increase the contact surface with the electrolyte.
The electrolytic hydrogen production efficiency of the hydrogen evolution electrode is improved, the contact surface with the electrolyte is increased, and the binding strength and the fluidity of the electrolyte are enhanced.
Smart Images
Figure CN223103099U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of hydrogen production by electrolyzing water, and more specifically, it relates to a hydrogen evolution electrode for an alkaline water electrolysis cell for hydrogen production. Background Art
[0002] Hydrogen has the advantages of wide sources, high energy density, cleanliness and no carbon. At present, hydrogen production by electrolyzing water is one of the methods to obtain hydrogen. An electrolyzer is a commonly used device for hydrogen production by electrolyzing water. In the electrolyzer, the hydrogen evolution electrode is a key component that determines the hydrogen production efficiency. In the prior art, the hydrogen evolution electrode is usually a metal mesh sheet woven by nickel metal wires. However, due to the smooth surface and low roughness of the nickel wires, the specific surface area of the nickel wire mesh is small, which in turn affects the hydrogen production efficiency of the electrolyzer. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a hydrogen evolution electrode for an alkaline water electrolysis cell for hydrogen production, aiming to improve the hydrogen production efficiency of the electrolyzer by increasing the specific surface area of the hydrogen evolution electrode.
[0004] To achieve the above purpose, the technical solution adopted by the utility model is: to provide a hydrogen evolution electrode for an alkaline water electrolysis cell for hydrogen production, which includes a nickel foam substrate, a plurality of first metal wires and a plurality of second metal wires. The plurality of first metal wires are arranged in parallel with each other and alternately penetrate and wind around the nickel foam substrate in the up and down direction along a first direction. The plurality of second metal wires are arranged in parallel with each other and alternately penetrate and wind around the nickel foam substrate in the up and down direction along a second direction. The first direction is perpendicular to the second direction.
[0005] In a possible implementation, the odd-numbered wires among the plurality of first metal wires intersect with the even-numbered wires among the plurality of second metal wires on the first end face of the nickel foam substrate, and intersect with the odd-numbered wires among the plurality of second metal wires on the second end face of the nickel foam substrate; the even-numbered wires among the plurality of first metal wires intersect with the odd-numbered wires among the plurality of second metal wires on the first end face of the nickel foam substrate, and intersect with the even-numbered wires among the plurality of second metal wires on the second end face of the nickel foam substrate.
[0006] In a possible implementation, the plurality of first metal wires and the plurality of second metal wires are intertwined with each other in space to form a mesh structure, and the mesh number of the mesh structure is 30-100 meshes.
[0007] In a possible implementation, the nickel foam substrate is provided with current-carrying holes for the electrolyte to flow through, and the current-carrying holes are located in the pores of the mesh structure.
[0008] In a possible implementation, flat segments are provided on both the first metal wire and the second metal wire, and the flat segments are located on the end face of the nickel foam substrate.
[0009] In a possible implementation, the width of the flat segment is between 0.5 mm and 0.8 mm.
[0010] In a possible implementation, a metal particle layer is provided on the flat segment.
[0011] In a possible implementation, the thickness of the metal particle layer is 0.001 mm to 0.003 mm.
[0012] In a possible implementation, any two intersecting flat segments are fixed by welding.
[0013] In a possible implementation, both the first metal wire and the second metal wire are nickel metal wires.
[0014] The beneficial effect of a hydrogen evolution electrode for an alkaline water electrolysis cell provided by the present utility model lies in that: compared with the prior art, the hydrogen evolution electrode for an alkaline water electrolysis cell of the present utility model, by weaving a nickel foam substrate into a network structure formed by weaving a plurality of first metal wires and a plurality of second metal wires, is equivalent to filling the nickel foam substrate into the pores of the network structure formed by weaving the first metal wires and the second metal wires. By means of the nickel foam substrate, the specific surface area of the hydrogen evolution electrode is increased, and the contact surface with the electrolyte is enlarged, thereby improving the electrolytic hydrogen production efficiency of the hydrogen evolution electrode. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0016] Figure 1 FIG. 1 is a front structural schematic diagram of a hydrogen evolution electrode for an alkaline water electrolysis cell provided by an embodiment of the present utility model;
[0017] Figure 2 FIG. 2 is a back structural schematic diagram of a hydrogen evolution electrode for an alkaline water electrolysis cell provided by an embodiment of the present utility model;
[0018] Figure 3 FIG. 3 is a sectional view taken along line A-A in FIG. 1. Figure 1 FIG. 3 is a sectional view taken along line A-A in FIG. 1.
[0019] Description of the reference numerals:
[0020] 1. Nickel foam substrate; 101. Current-carrying hole; 2. First metal wire; 3. Second metal wire; 4. Cross joint; 5. Flat section. Specific embodiments
[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0023] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.
[0025] Please refer to Figures 1 to 3 , and now a hydrogen evolution electrode for an alkaline water electrolyzer provided by the present utility model will be described. The hydrogen evolution electrode for an alkaline water electrolyzer includes a nickel foam substrate 1, a plurality of first metal wires 2 and a plurality of second metal wires 3. The plurality of first metal wires 2 are arranged in parallel with each other and alternately penetrate and wind around the nickel foam substrate 1 in the up and down directions along a first direction. The plurality of second metal wires 3 are arranged in parallel with each other and alternately penetrate and wind around the nickel foam substrate 1 in the up and down directions along a second direction. The first direction is perpendicular to the second direction.
[0026] Among them, the nickel foam substrate 1 is a sheet-like structure. Due to its high porosity, the nickel foam substrate 1 has a relatively large specific surface area. In this embodiment, the thickness of the nickel foam substrate 1 is between 1 mm and 2 mm. Both the first metal wire 2 and the second metal wire 3 are nickel metal wires. A plurality of first metal wires 2 and a plurality of second metal wires 3 are intertwined in space to form a mesh structure, and the mesh structure formed has a mesh number of 30 to 100 meshes.
[0027] A hydrogen evolution electrode for an alkaline water electrolysis cell provided by the present utility model, compared with the prior art, by weaving the nickel foam substrate 1 into the mesh structure formed by weaving a plurality of first metal wires 2 and a plurality of second metal wires 3, it is equivalent to filling the nickel foam substrate 1 into the pores of the mesh structure formed by weaving the first metal wire 2 and the second metal wire 3. By means of the nickel foam substrate 1, the specific surface area of the hydrogen evolution electrode is increased, and its contact surface with the electrolyte is increased, thereby improving the electrolytic hydrogen production efficiency of the hydrogen evolution electrode.
[0028] In some embodiments, please refer to the figures. To improve the bonding strength between the nickel foam substrate 1, the first metal wire 2, and the second metal wire 3, in production, the odd-numbered wires among the plurality of first metal wires 2 intersect with the even-numbered wires among the plurality of second metal wires 3 on the first end face of the nickel foam substrate 1 and intersect with the odd-numbered wires among the plurality of second metal wires 3 on the second end face of the nickel foam substrate 1; the even-numbered wires among the plurality of first metal wires 2 intersect with the odd-numbered wires among the plurality of second metal wires 3 on the first end face of the nickel foam substrate 1 and intersect with the even-numbered wires among the plurality of second metal wires 3 on the second end face of the nickel foam substrate 1. Among them, the first end face is the front face of the nickel foam substrate 1, and the second end face is the back face of the nickel foam substrate 1. In production, the plurality of first metal wires 2 and the plurality of second metal wires 3 are sorted and numbered. Among them, the metal wires numbered as odd numbers are the odd-numbered wires, and the metal wires numbered as even numbers are the even-numbered wires. Through the above settings, a plurality of first metal wires 2 and a plurality of second metals form cross joints 4 on both the front and back faces of the nickel foam substrate 1, thereby imprisoning the nickel foam substrate 1 and improving its bonding strength with the first metal wire 2 and the second metal wire 3.
[0029] Optionally, please refer to Figure 1 and Figure 2 , and current-carrying holes 101 for the flow of the electrolyte are provided on the nickel foam substrate 1. Among them, the number of current-carrying holes 101 is multiple, and the multiple current-carrying holes 101 are arranged in the pores of the mesh structure formed by the spatial intersection of the plurality of first metal wires 2 and the plurality of second metal wires 3. By providing the current-carrying holes 101, a channel for the flow of the electrolyte is provided, and the electrolyte in the electrolysis cell can flow smoothly.
[0030] Optionally, please refer to Figures 1 to 3, flat sections 5 are provided on both the first wire 2 and the second wire 3. The flat sections 5 are located on the end faces of the nickel foam substrate 1. In this embodiment, the flat sections 5 of the first wire 2 and the second wire 3 cross on the front and back surfaces of the nickel foam substrate 1 to form cross joints 4. In application, the two flat sections 5 forming the cross joints 4 are fixed by welding. In this implementation, the width of the flat section 5 is between 0.5 mm and 0.8 mm. By setting the flat section 5, the contact area between the first wire 2 and the second wire 3 and the nickel foam substrate 1 is increased, and the first wire 2 and the second wire 3 are prevented from generating concentrated stress on the nickel foam substrate 1 and damaging the nickel foam substrate 1.
[0031] Optionally, in order to increase the specific surface area of the first wire 2 and the second wire 3, a metal particle layer is sprayed on the flat sections 5 of the first wire 2 and the second wire 3. The thickness of the metal particle layer is 0.001 mm to 0.003 mm. Among them, the metal particle layer is mainly nickel powder particles. By setting the metal particle layer, the surface roughness of the flat section 5 is increased, the specific surface area of the flat section 5 is increased, the contact area with the electrolyte is increased, and the electrolytic hydrogen production efficiency of the hydrogen evolution electrode is improved.
[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. A hydrogen evolution electrode for an alkaline water electrolyzer for hydrogen production, characterized in that, It includes a nickel foam substrate (1), a plurality of first metal wires (2) and a plurality of second metal wires (3). The plurality of first metal wires (2) are arranged parallel to each other and penetrate and wind around the nickel foam substrate (1) alternately up and down along a first direction. The plurality of second metal wires (3) are arranged parallel to each other and penetrate and wind around the nickel foam substrate (1) alternately up and down along a second direction. The first direction is perpendicular to the second direction. The odd-numbered wires among the plurality of first metal wires (2) intersect with the even-numbered wires among the plurality of second metal wires (3) on the first end face of the nickel foam substrate (1) and intersect with the odd-numbered wires among the plurality of second metal wires (3) on the second end face of the nickel foam substrate (1); the even-numbered wires among the plurality of first metal wires (2) intersect with the odd-numbered wires among the plurality of second metal wires (3) on the first end face of the nickel foam substrate (1) and intersect with the even-numbered wires among the plurality of second metal wires (3) on the second end face of the nickel foam substrate (1).
2. The hydrogen evolution electrode for an alkaline water electrolyzer according to claim 1, characterized in that, The plurality of first metal wires (2) and the plurality of second metal wires (3) are intertwined with each other in space to form a mesh structure, and the mesh number of the mesh structure is 30 to 100 meshes.
3. The hydrogen evolution electrode for an alkaline water electrolyzer according to claim 2, characterized in that, The nickel foam substrate (1) is provided with current-carrying holes (101) for the electrolyte to flow through, and the current-carrying holes (101) are located in the pores of the mesh structure.
4. The hydrogen evolution electrode for an alkaline water electrolyzer according to claim 1, characterized in that, Flat sections (5) are provided on both the first metal wire (2) and the second metal wire (3), and the flat sections (5) are located on the end faces of the nickel foam substrate (1).
5. The hydrogen evolution electrode for an alkaline water electrolyzer for hydrogen production according to claim 4, characterized in that, The width of the flat section (5) is between 0.5 mm and 0.8 mm.
6. The hydrogen evolution electrode for an alkaline water electrolyzer according to claim 4, characterized in that, A metal particle layer is provided on the flat section (5).
7. The hydrogen evolution electrode for an alkaline water electrolyzer according to claim 6, characterized in that, The thickness of the metal particle layer is 0.001 mm to 0.003 mm.
8. The hydrogen evolution electrode for an alkaline water electrolyzer according to claim 4, characterized in that, Any two intersecting flat sections (5) are fixed by welding.
9. A hydrogen evolution electrode for an alkaline water electrolyzer according to any one of claims 1-8, characterized in that, Both the first metal wire (2) and the second metal wire (3) are nickel metal wires.