Elastic net, self-supporting electrode, electrolysis assembly and electrolytic bath

Abstract

The invention discloses an elastic net, a self-supporting electrode, an electrolysis assembly and an electrolytic bath, the elastic net is obtained by weaving metal wires and plastic fibers, the elastic net comprises a plurality of first ribs protruding towards one side and a plurality of second ribs protruding towards the other opposite side, and the first ribs and the second ribs are alternately connected into a whole; therefore, an uneven contact surface is formed on the surface of each side of the elastic net. The metal wires and the plastic fibers are compositely woven, a wave-like elastic net structure is obtained through subsequent compression molding, on one hand, the plastic fibers endow the elastic net with more excellent strength, resilience force and stability, and it is guaranteed that the elastic net can stably make contact with electrodes and polar plates on the two sides; on the other hand, the metal wires can be woven more tightly through the plastic fibers, and compared with a metal woven net with the same weaving density, the contact resistance of the elastic net is reduced, and the electrolysis efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of water electrolysis, and specifically relates to an elastic net, a self-supporting electrode, an electrolysis component and an electrolytic cell. Background Art

[0002] The conventional electrolytic cell structure includes a diaphragm and electrodes arranged on both sides of the diaphragm. The outer side of the electrode is connected to the electrode plate through a supporting structure. The supporting structure is used to electrically connect the electrodes and the electrode plate on both sides, and at the same time, a channel for electrolyte and gas to flow is constructed between the electrode and the electrode plate.

[0003] Conventional support structures mainly include mastoid structures, plate meshes and metal woven meshes. The former two use a rigid structure that is integrally formed with the electrode plate or additionally stamped. Since the electrode mesh is subjected to axial pressure during operation, the mastoid and plate mesh structures cannot ensure stable contact with the electrode mesh at all locations, which can easily lead to poor contact and affect the electrolysis efficiency. The latter is a mesh structure formed by weaving metal wires, which is fitted with the electrode plates and the electrode mesh on both sides through the metal wires. Since the metal wires have a certain elasticity, they can better ensure contact with the electrode meshes and the electrode plates on both sides compared to the mastoid and plate mesh structures. However, the applicant found in actual application that the metal woven mesh has low strength, insufficient resilience, and is prone to wire breakage. In particular, due to the metal fatigue characteristics, after long-term use under pressure, gaps will appear in the metal woven elastic mesh in the area where the nickel wires are intertwined, resulting in increased contact resistance, thereby reducing the electrolysis efficiency. Summary of the invention

[0004] The purpose of the present application is to provide an elastic net, a self-supporting electrode, an electrolytic assembly and an electrolytic cell to solve the technical problem in the prior art that a metal woven net is used as a supporting structure between an electrode and a plate, the metal woven net has low strength, insufficient resilience, and is prone to wire breakage. After long-term use, gaps are generated between the nickel wires interwoven inside the metal woven net, affecting stable contact, thereby reducing electrolysis efficiency.

[0005] In order to achieve the above-mentioned objectives, the first aspect of the present application provides an elastic net woven from metal wires and plastic fiber wires, wherein the elastic net includes a plurality of first ridges protruding toward one side and a plurality of second ridges protruding toward the opposite side, wherein the first ridges and the second ridges are alternately connected as a whole so that each side surface of the elastic net forms an uneven contact surface.

[0006] In one or more embodiments, the elastic net includes several groups of composite wires arranged in sequence along the Y-axis direction, each group of the composite wires includes several strands of metal wires and several strands of plastic fiber wires extending in the X-axis direction with the same direction, and the adjacent composite wires in the Y-axis direction are connected as a whole.

[0007] In one or more embodiments, the composite wire is a wavy structure extending along the X-axis direction, and includes crest segments and trough segments that are alternately connected in sequence; the crest segments of each group of the composite wires are sleeved on the crest segments of adjacent composite wires, and the trough segments of each group of the composite wires are sleeved on the trough segments of adjacent composite wires.

[0008] In one or more embodiments, the braiding density of the composite yarn is 0.8 to 1.2 kg / m 2 The width of the peak section and / or the trough section is 8 to 12 mm.

[0009] In one or more embodiments, the first ridge is extended along a straight line, a folded line or a curved line, and the second ridge extends in the same direction as the first ridge.

[0010] In one or more embodiments, the first ridge and / or the second ridge has a depth of 5 to 7 mm and a width of 6 to 10 mm.

[0011] In one or more embodiments, the metal wire is a nickel wire or a nickel-plated iron wire with a diameter of 0.15 to 0.3 mm.

[0012] In one or more embodiments, the plastic fiber filaments are polytetrafluoroethylene (PTFE) fiber filaments, polyphenylene sulfide (PPS) fiber filaments, polypropylene (PP) fiber filaments or polysulfone (PSU) fiber filaments.

[0013] In order to achieve the above-mentioned purpose, the second aspect of the present application provides a self-supporting electrode, comprising an electrode body and the elastic net described in any one of the above-mentioned embodiments, wherein the elastic net is attached to a side surface of the electrode body.

[0014] In one or more embodiments, the outer edge of the elastic net is fixedly disposed on the electrode body.

[0015] In one or more embodiments, the outer edge of the elastic net is fixed to the electrode body by welding, gluing with conductive adhesive, or injection molding.

[0016] In one or more embodiments, the electrode body is a nickel mesh electrode.

[0017] In order to achieve the above objectives, a third aspect of the present application provides an electrolytic component, comprising a pole plate and the self-supporting electrode described in any of the above embodiments, wherein the pole plate is arranged on the side of the elastic net away from the electrode body, and the pole plate is arranged in contact with the elastic net.

[0018] In order to achieve the above-mentioned purpose, a fourth aspect of the present application provides an electrolytic cell, comprising a diaphragm and the electrolytic components described in any of the above-mentioned embodiments, wherein the electrolytic components are arranged on both sides of the diaphragm, and the electrode body of each of the electrolytic components is arranged in contact with the diaphragm.

[0019] Different from the prior art, the beneficial effects of this application are:

[0020] The present application achieves this by weaving metal wires and plastic fiber wires together, and then pressing and molding a wavy elastic mesh structure. The plastic fiber wires can bind the metal wires tightly, which, on the one hand, gives the elastic mesh more excellent strength, resilience and stability. The elastic mesh can still maintain high elasticity over a long period of time, ensuring that it can stably contact the electrodes and plates on both sides, effectively improving the electrolysis efficiency. On the other hand, the plastic fiber wires can weave the metal wires more tightly. Compared with a metal woven mesh with the same weaving density, it can achieve better conductivity without affecting the channel size, reduce the contact resistance of the elastic mesh, and thus further improve the electrolysis efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the structure of an implementation method of the elastic network of the present application;

[0023] Figure 2 It is a structural schematic diagram of an implementation method of the elastic net of the present application after being unfolded;

[0024] Figure 3 It is a schematic diagram of the braided structure of the composite yarn of the present application;

[0025] Figure 4 It is a structural schematic diagram of an embodiment of a self-supporting electrode of the present application;

[0026] Figure 5 It is a structural schematic diagram of an embodiment of an electrolytic assembly of the present application;

[0027] Figure 6 It is a structural schematic diagram of an embodiment of an electrolytic cell of the present application;

[0028] Figure 7 is a photograph of the elastic net of Example 1 of the present application;

[0029] Figure 8is a partial detail photo of the elastic net of Example 1 of the present application;

[0030] Fig. 9 is a photograph of the elastic net of Example 2 of the present application;

[0031] Fig.10 This is a photograph of the elastic net of Comparative Example 1 of the present application. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0033] In order to construct a channel for electrolyte and gas flow between the plate and the electrode, a conductive support structure is provided between the plate and the electrode. In order to solve the problems existing in the prior art of using the mastoid and plate mesh structure as the support structure between the plate and the electrode, the applicant previously developed a metal braided mesh as the support structure, but in actual application, it was found that the metal braided mesh support structure had a poor contact problem after long-term use.

[0034] Specifically, during electrolysis, both the electrode mesh and the electrode plate are subjected to axial pressure. The metal braided mesh needs to be repeatedly compressed and reset under the action of axial force. The poor resilience and metal fatigue characteristics will cause the metal braided mesh to be unable to be effectively reset after long-term use. There are contact gaps of interwoven nickel wires in some positions inside the metal braided elastic mesh, affecting the electrolysis efficiency. On the other hand, in order to ensure smooth channels and control costs, the weaving density of the metal braided mesh is limited. At limited density, the internal resistance of the metal braided mesh is high, affecting the electrolysis efficiency.

[0035] In order to solve the above problems, the applicant creatively developed a new type of elastic net, which has a resilience significantly better than that of the metal woven net. At the same time, it can still maintain effective elasticity after long-term use, ensuring stable contact between the elastic net and the plates and electrodes on both sides, thereby ensuring electrolysis efficiency.

[0036] Specifically, see Figures 1 to 3 , Figure 1 is a schematic diagram of the structure of an implementation method of the elastic network of the present application, Figure 2 is a structural schematic diagram of an implementation method of the elastic net of the present application after it is unfolded, Figure 3 It is a schematic diagram of the braided structure of the composite yarn of the present application.

[0037] like Figures 1 to 3As shown, the elastic net 10 is woven from metal wires 101 and plastic fiber wires 102, and the elastic net 10 includes a plurality of first ridges 103 protruding toward one side and a plurality of second ridges 104 protruding toward the other opposite side, and the first ridges 103 and the second ridges 104 are alternately connected as a whole, so that each side surface of the elastic net 10 forms an uneven contact surface. It can be understood that the two side surfaces of the elastic net 10 can be in contact with the electrode and the plate respectively, and the electrical connection between the electrode and the plate 30 is achieved through the metal wires 101.

[0038] By composite weaving the metal wire 101 and the plastic fiber filament 102, after subsequent press molding to obtain a wavy elastic net 10 structure, the plastic fiber filament 102 can bind the metal wire 101 tightly, which gives the elastic net 10 better strength, resilience and stability. Under long-term action, the elastic net 10 can still maintain a high elasticity, ensuring that it can stably contact the electrodes and plates 30 on both sides, effectively improving the electrolysis efficiency.

[0039] On the other hand, the plastic fiber filaments 102 can weave the metal wires 101 more tightly, and compared with the metal woven mesh with the same weaving density, it can achieve better conductivity without affecting the channel size, reduce the contact resistance of the elastic mesh 10, and thus further improve the electrolysis efficiency.

[0040] The following is a detailed description of the weaving method of the metal wire 101 and the plastic fiber wire 102 in the present application. In this embodiment, the metal wire 101 and the plastic fiber wire 102 are woven together, and the directions of the two are consistent, so as to ensure that the channel size is not affected by the plastic fiber wire 102. In this embodiment, the elastic net 10 includes a plurality of groups of composite wires 100 arranged in sequence along the Y-axis direction, and each group of composite wires 100 includes a strand of metal wire 101 and a strand of plastic fiber wire 102 extending in the X-axis direction and having the same direction. The adjacent composite wires 100 in the Y-axis direction are connected as a whole to form an integral woven net.

[0041] Specifically, Figure 3 As shown, in this embodiment, the composite wire 100 is a wavy structure extending along the X-axis direction, and includes crest segments 105 and trough segments 106 that are alternately connected in sequence; the crest segments 105 of each group of composite wires 100 are sleeved on the crest segments 105 of adjacent composite wires 100, and the trough segments 106 of each group of composite wires 100 are sleeved on the trough segments 106 of adjacent composite wires 100, thereby forming an overall woven structure.

[0042] Based on the above-mentioned braided structure, on the one hand, sufficient electrolyte and gas flow channels can be guaranteed, and on the other hand, the high strength and elasticity characteristics of the plastic fiber filaments 102 can be fully utilized, so that the plastic fiber filaments 102 can fully bind the metal wires 101 of the composite wires 100 on both sides, giving the elastic net 10 higher strength and resilience.

[0043] In one embodiment, considering the resilience of the elastic net 10 and the smoothness of the gas-liquid channel, the arrangement density of the composite wire 100 can be 0.8-1.2 kg / m 2 The width of the peak section 105 and the trough section 106 may be 8 to 12 mm.

[0044] In other embodiments, the arrangement density of the composite wires 100 and the widths of the peak section 105 and the trough section 106 of each composite wire 100 may also be adjusted based on actual working conditions, and the effect of this embodiment can be achieved.

[0045] In addition, in the present embodiment, each group of composite wires 100 is composed of one metal wire 101 and one plastic fiber wire 102. In other embodiments, the number of metal wires 101 and plastic fiber wire 102 can also be adjusted based on actual working conditions. For example, each group of composite wires 100 can be composed of two metal wires 101 and one plastic fiber wire 102, and so on. All of these can achieve the effect of the present embodiment.

[0046] In particular, in this embodiment, the metal wires 101 and the plastic fiber wires 102 of each group of composite wires 100 are arranged parallel to each other. In some specific application scenarios, the metal wires 101 and the plastic fiber wires 102 can also be intertwined to obtain the composite wire 100, which can also achieve the effect of this embodiment.

[0047] In one embodiment, the metal wire 101 can be a nickel wire or a nickel-plated iron wire with a diameter of 0.15 to 0.3 mm, and the plastic fiber filament 102 can be a polytetrafluoroethylene (PTFE) fiber filament, polyphenylene sulfide (PPS) fiber filament, polypropylene (PP) fiber filament or polysulfone (PSU) fiber filament with a diameter of 0.10 to 0.25 mm, all of which can achieve the effect of this embodiment.

[0048] Please continue reading Figure 1 In this embodiment, the first ridge 103 and the second ridge 104 are extended along a straight line; in other embodiments, the first ridge 103 and the second ridge 104 may also be extended along a V-shaped fold line, or may also be extended along a curve such as a wavy line, as long as the extension directions of the first ridge 103 and the second ridge 104 are the same, and the effect of this embodiment can be achieved.

[0049] For ridge structures with different extending directions, the structure of the pressing mold during production can be changed accordingly, so that the elastic net 10 with different ridge directions can be quickly pressed and formed.

[0050] In order to ensure the appropriate resilience of the elastic net 10 and match the channel requirements of the electrolytic cell, in one embodiment, the first ridge 103 and the second ridge 104 may have a depth of 5 to 7 mm and a width of 6 to 10 mm.

[0051] The present application also provides a self-supporting electrode, see Figure 4 , Figure 4 Schematic diagram of the structure of a self-supporting electrode of the present invention. Figure 4 As shown, the self-supporting electrode includes an electrode body 20 and an elastic net 10 of any of the above embodiments, wherein the elastic net 10 is attached to one side of the electrode body 20 .

[0052] In this embodiment, the electrode body 20 and the elastic net 10 are matching circular structures. In other embodiments, the structures of the electrode body 20 and the elastic net 10 can also be adjusted based on actual needs to ensure that the shapes of the two are consistent and fit each other, and the effect of this embodiment can be achieved.

[0053] In one embodiment, the electrode body 20 may be a nickel mesh electrode. In other embodiments, the electrode body 20 may also be any material that can be applied to water electrolysis electrodes, and the effect of this embodiment can be achieved.

[0054] In order to ensure the stable fit between the electrode body 20 and the elastic net 10, and at the same time ensure the integrity of the overall structure, in this embodiment, the outer edge of the elastic net 10 is also fixed to the electrode body 20. In one embodiment, the outer edge of the elastic net 10 can be fixed to the electrode body 20 by welding. In another embodiment, the outer edge of the elastic net 10 can also be fixed to the electrode body 20 as a whole by conductive glue, both of which can achieve the effect of the present embodiment.

[0055] It should be noted that in some application scenarios, when a support structure for pressing the elastic net 10 to the electrode body 20 is also arranged in the electrolytic cell, the elastic net 10 may not be fixed to the electrode body 20; or, in other embodiments, other positions of the elastic net 10 may be fixed to the electrode body 20, such as the center position of the elastic net 10, etc., which can achieve the effect of this embodiment.

[0056] This application also provides an electrolytic component, see Figure 5 , Figure 5 Schematic diagram of the structure of an embodiment of the electrolytic component of the present application. Figure 4As shown, the electrolytic assembly includes an electrode plate 30 and a self-supporting electrode of any of the above embodiments.

[0057] The electrode plate 30 is arranged on a side of the elastic net 10 away from the electrode body 20 , and the electrode plate 30 is arranged in close contact with the elastic net 10 .

[0058] In this embodiment, the electrode plate 30 can be made of any electrode plate 30 material commonly used in the art, such as metal materials such as carbon steel and nickel, which is not limited here.

[0059] The electrolytic component of this embodiment adopts an elastic net 10 structure woven from metal wires 101 and plastic fiber wires 102, which can ensure stable contact between the elastic net 10 and the electrode plate 30 and the electrode body 20 at all locations after long-term use, so that the current is evenly distributed and the electrolysis efficiency is guaranteed.

[0060] This application also provides an electrolytic cell, see Figure 6 , Figure 6 Schematic diagram of the structure of an embodiment of the electrolytic cell of the present application. Figure 6 As shown, the electrolytic cell includes a diaphragm 40 and an electrolytic assembly of any one of the above-mentioned embodiments.

[0061] A pair of electrolytic components are symmetrically arranged on both sides of the diaphragm 40 , and the electrode bodies 20 of the electrolytic components are arranged in close contact with the diaphragm 40 .

[0062] In one embodiment, the diaphragm 40 may be a conventional PPS diaphragm; in other embodiments, the diaphragm 40 may also be made of any diaphragm 40 material that can be applied to a water electrolysis electrolyzer, and the effects of the present embodiment can be achieved.

[0063] The electrolytic cell of this embodiment adopts the elastic mesh 10 structure obtained by weaving the metal wire 101 and the plastic fiber wire 102 together. Compared with the metal woven mesh, the elastic mesh 10 is not easy to break, which effectively reduces the probability of damage to the diaphragm 40. At the same time, the applicant unexpectedly found during the experiment that the contact resistance of the elastic mesh 10 is also significantly lower than that of the metal woven mesh with the same weaving density, the elastic mesh 10 has higher conductivity, and the electrolytic cell is more efficient. The reason may be that the plastic fiber wire 102 binds the metal wire 101 more tightly, effectively reducing the contact resistance.

[0064] It should be noted that the present embodiment only shows an electrolytic cell structure with a single diaphragm 40. In other embodiments, the electrolytic cell may also include any number of diaphragms 40 arranged at intervals. Both sides of each diaphragm 40 may be arranged with electrolytic components of any of the above embodiments, wherein the electrode plates 30 of the electrolytic components located at both ends of the electrolytic cell are respectively a positive electrode plate 30 and a negative electrode plate 30, and the electrode plate 30 of the electrolytic component located in the middle of the electrolytic cell may be a bipolar plate 30.

[0065] The effects of the technical solution of the present application will be further described in detail below in conjunction with specific embodiments.

[0066] Embodiment 1:

[0067] An electrolytic cell comprises a diaphragm and electrolytic components arranged on both sides of the diaphragm, each electrolytic component comprising an electrode body, an elastic net and an electrode plate arranged in sequence in a direction away from the diaphragm.

[0068] Among them, the diaphragm is a PPS diaphragm with a thickness of 0.8mm, the electrode body is a 46-mesh 0.25mm wire diameter twill nickel mesh, and the electrode plate is a carbon steel nickel-plated plate.

[0069] The structure of the elastic net can be found in Figure 7 and Figure 8 , Figure 7 is a photograph of the elastic net of Example 1 of the present application, Figure 8 This is a partial detail photo of the elastic net of Example 1 of the present application. The elastic net includes multiple groups of composite wires connected in sequence in the Y-axis direction and extending in the X-axis direction. Each group of composite wires includes a nickel wire with a diameter of 0.19 mm and a polytetrafluoroethylene fiber wire with a diameter of 0.19 mm. The braiding density of the composite wire is 1 kg / m 2 The peak width of each group of composite wires is 12 mm and the trough width is 8 mm.

[0070] The first ridge and the second ridge of the elastic net are extended along the V-shaped fold line, and the width of the first ridge and the second ridge is 10.0 mm and the depth is 7 mm.

[0071] Embodiment 2:

[0072] An electrolytic cell, the structure of which is substantially the same as that of Example 1, except that:

[0073] The first ridge and the second ridge of the elastic net of Example 2 are arranged to extend in a straight line, and the width of the first ridge and the second ridge is 10.0 mm and the depth is 6.0 mm. The structure of the elastic net of Example 2 can be seen in Fig. 9 , Fig. 9 This is a photograph of the elastic net of Example 2 of the present application.

[0074] Embodiment 3:

[0075] An electrolytic cell, the structure of which is substantially the same as that of Example 1, except that:

[0076] The first ridges and the second ridges of the elastic net of Example 3 are extended along the corrugated curve, and the width of the first ridges and the second ridges is 10 mm, and the depth is 5.5 mm.

[0077] Comparative Example 1:

[0078] An electrolytic cell, the structure of which is substantially the same as that of Example 1, except that:

[0079] No plastic fiber is added to the elastic net of Comparative Example 1, and the other parameters are the same as those of the elastic net of Example 1. The structure of the elastic net of Comparative Example 1 can be seen in Fig.10 , Fig.10 This is a photograph of the elastic net of Comparative Example 1 of the present application.

[0080] Effect example 1: Mechanical properties analysis

[0081] The elastic nets of Examples 1 to 3 and Comparative Example 1 were subjected to mechanical property analysis according to GBT 24442.1-2009 Determination of compression properties of textiles Part 1: Constant method. The elastic nets were subjected to a shaping method elastic force test to measure the initial wave height value and the light pressure wave height value T0. At the same time, the wave high pressure intensity and resistance of the elastic net at a thickness of 4 mm were measured, and the compression elasticity of the elastic net was further measured to obtain the data in the following table.

[0082]

[0083] As shown in the above table, the compression elasticity of Examples 1 to 3 is better than that of Comparative Example 1. The elastic nets of Examples 1 to 3 are less likely to deform under external force and can ensure stable contact when applied between the electrode body and the electrode plate. This is because the elastic force of the plastic fiber filaments gives the elastic net more excellent strength, resilience and stability, and the elastic net can still maintain a high elasticity under long-term action.

[0084] Furthermore, the resistance of the elastic nets of Examples 1 to 3 when compressed to a thickness of 4 mm is much lower than that of Comparative Example 1. This is because the elastic force of the plastic fiber filaments weaves the metal wires more tightly, thereby effectively improving the conductive performance.

[0085] Effect Example 2:

[0086] The electrical performance of the electrolytic cells of Examples 1 to 3 and Comparative Example 1 was tested to measure the electrical properties of the electrolytic cells at 5000 A / m 2 The cell voltage between the two plates at current density, and the 2 The energy consumption under current density is obtained, and the data in the following table is obtained.

[0087]

[0088] As shown in the above table, the cell voltage and energy consumption of Examples 1 to 3 are lower than those of Comparative Example 1, which means that the elastic nets of Examples 1 to 3 have better electrical conductivity. This is because the elastic force of the plastic fiber filaments weaves the metal wires more tightly, thereby effectively improving the electrical conductivity.

[0089] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present application. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0090] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An elastic net, characterized in that: The elastic net is woven from metal wires and plastic fiber wires, and includes a plurality of first ridges protruding toward one side and a plurality of second ridges protruding toward the opposite side. The first ridges and the second ridges are alternately connected as a whole, so that each side surface of the elastic net forms an uneven contact surface.

2. The elastic net according to claim 1, characterized in that The elastic net includes several groups of composite wires arranged in sequence along the Y-axis direction, each group of the composite wires includes several strands of metal wires and several strands of plastic fiber wires extending along the X-axis direction and having the same direction, and the adjacent composite wires in the Y-axis direction are connected as a whole.

3. The elastic net according to claim 2, characterized in that: The composite wire is a wavy structure extending along the X-axis direction, and includes crest segments and trough segments that are alternately connected in sequence; the crest segments of each group of the composite wires are sleeved on the crest segments of adjacent composite wires, and the trough segments of each group of the composite wires are sleeved on the trough segments of adjacent composite wires.

4. The elastic net according to claim 3, characterized in that: The braiding density of the composite yarn is 0.8-1.2 kg / m 2 The width of the peak section and / or the trough section is 8 to 12 mm.

5. The elastic net according to claim 1, characterized in that: The first convex ridge is extended along a straight line, a folded line or a curved line, and the second convex ridge extends in the same direction as the first convex ridge.

6. The elastic net according to claim 1, characterized in that: The first convex ridge and / or the second convex ridge has a depth of 5 to 7 mm and a width of 6 to 10 mm.

7. The elastic net according to claim 1, characterized in that: The metal wire is a nickel wire or a nickel-plated iron wire with a diameter of 0.15 to 0.3 mm.

8. The elastic net according to claim 1, characterized in that: The plastic fiber filaments are polytetrafluoroethylene (PTFE) fiber filaments, polyphenylene sulfide (PPS) fiber filaments, polypropylene (PP) fiber filaments or polysulfone (PSU) fiber filaments with a diameter of 0.10-0.25 mm.

9. A self-supporting electrode, characterized in that: It comprises an electrode body and the elastic net as claimed in any one of claims 1 to 8, wherein the elastic net is attached to one side of the electrode body.

10. The self-supporting electrode according to claim 9, characterized in that The outer edge of the elastic net is fixedly arranged on the electrode body.

11. The self-supporting electrode according to claim 10, characterized in that The outer edge of the elastic net is fixed to the electrode body by welding, gluing with conductive adhesive or by injection molding.

12. The self-supporting electrode according to claim 9, characterized in that The electrode body is a nickel mesh electrode.

13. An electrolytic component, characterized in that: It comprises a pole plate and the self-supporting electrode according to any one of claims 9 to 12, wherein the pole plate is arranged on a side of the elastic net away from the electrode body, and the pole plate is arranged in close contact with the elastic net.

14. An electrolytic cell, characterized in that: It comprises a diaphragm and the electrolytic component according to claim 13, wherein the electrolytic components are arranged on both sides of the diaphragm, and the electrode body of each electrolytic component is arranged in contact with the diaphragm.

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