Electric de-intercalation electrode plate, electric de-intercalation membrane stack and lithium extraction device

Abstract

The utility model discloses an electric de-intercalation electrode plate, an electric de-intercalation membrane stack and a lithium extraction device, and belongs to the technical field of lithium extraction devices. And the electric de-embedding electrode plate comprises an outer frame and a metal net pole piece. The metal net pole piece is arranged in the inner circumferential direction of the outer frame; wherein a water inlet hole and a water outlet hole are formed in the two ends of the outer frame in the first direction respectively, and the metal net pole piece and the outer frame are integrally formed. According to the electric de-embedding electrode plate provided by the invention, the assembly difficulty of an electric de-embedding membrane stack is effectively reduced, and the assembly efficiency is improved. And meanwhile, the sealing performance between the metal net pole piece and the outer frame is guaranteed, so that the material of the outer frame is not limited to soft materials such as rubber and silica gel, the material selection range of the material of the outer frame is expanded, and the hardware cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of lithium extraction devices, and in particular to an electro-deintercalation electrode plate, an electro-deintercalation membrane stack and a lithium extraction device. Background Art

[0002] Lithium and lithium compounds such as lithium chloride, lithium carbonate, lithium hydroxide and organic lithium compounds are widely used in high-energy batteries, aerospace, nuclear power generation and other fields. Lithium is the main positive electrode material of high-energy batteries. With the rapid development of science and technology and the sharp increase in energy demand, energy faces great challenges, and lithium batteries have gradually become the mainstay of the battery industry.

[0003] Salt lake lithium resources account for more than 69% of the world's industrial lithium reserves, and extracting lithium from salt lake brine has become a relatively important means of lithium extraction. The main methods for extracting lithium from brine include evaporation crystallization, precipitation, extraction, adsorption, calcination, membrane separation, electrochemical lithium extraction and other methods. Among them, electrochemical lithium extraction technology, as a new type of lithium separation and extraction technology, has the advantages of being green and environmentally friendly, high lithium extraction efficiency, and good impurity separation effect, and has received more and more attention and research.

[0004] The electrochemical lithium extraction device is composed of an electro-deintercalation membrane stack, a pressing device, a water inlet pipe and a water outlet pipe, etc. The electro-deintercalation membrane stack is usually composed of an end plate, a guide plate, a gasket, at least one membrane stack unit, a gasket, a guide plate, and an end plate stacked in sequence, and the membrane stack unit is usually composed of a separator, an electrode plate, a separator, an ion exchange membrane, a separator, an electrode plate, a separator, and an ion exchange membrane stacked in sequence. Among them, the electrode plate usually includes an outer frame and a metal mesh electrode sheet, and the metal mesh electrode sheet is arranged on the inner circumference of the outer frame.

[0005] In the prior art, the outer frame of the electrode plate and the metal mesh electrode piece are split structures, and the inner circumferential wall of the outer frame is provided with a plug-in slot corresponding to the edge of the metal mesh electrode piece, so that the metal mesh electrode piece and the outer frame can be assembled together under the plug-in effect of the edge and the plug-in slot. However, this method has the problems of difficult assembly and low assembly efficiency. In addition, in order to ensure the sealing of the assembly between the edge and the plug-in slot, the material of the outer frame can only be limited to soft materials such as rubber, silicone and the like, resulting in a small range of material selection for the outer frame. Utility Model Content

[0006] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and to provide an electrically de-embedding electrode plate to solve the technical problem in the prior art that the outer frame and the metal mesh electrode are separate structures, resulting in difficult assembly and low assembly efficiency.

[0007] To solve the above technical problems, this application provides:

[0008] An electric deintercalation electrode plate, comprising:

[0009] Frame;

[0010] A metal mesh pole piece, the metal mesh pole piece is arranged in the inner circumference of the outer frame;

[0011] Wherein, a water inlet hole and a water outlet hole are respectively provided at two ends of the outer frame along the first direction, and the metal mesh electrode piece is integrally formed with the outer frame.

[0012] In addition, the electrical deintercalation electrode plate according to the present application may also have the following additional technical features:

[0013] In some embodiments of the present application, the electrical de-embedding electrode plate further includes a pole ear, one end of which is located in the outer frame and connected to the metal mesh pole piece, and the other end is passed through the outer frame and arranged outside the outer frame, and the pole ear and the metal mesh pole piece are integrally formed.

[0014] In some embodiments of the present application, a wiring port for connecting to a power source is provided at one end of the pole ear away from the metal mesh pole piece.

[0015] In some embodiments of the present application, the metal mesh pole piece includes an edge portion and a middle portion, the middle portion is located in the inner circumference of the edge portion, the edge portion is arranged in the outer frame, and the middle portion is arranged in the inner circumference of the outer frame.

[0016] In some embodiments of the present application, active material layers are disposed on two opposite sides of the middle portion along a second direction, and the second direction is perpendicular to the first direction.

[0017] In some embodiments of the present application, the thickness of the metal mesh pole piece and the pole ear are both smaller than the thickness of the outer frame.

[0018] In some embodiments of the present application, the shapes of the water inlet hole and the water outlet hole are one or more of elliptical, semi-elliptical, circular, semi-circular, and polygonal.

[0019] In a second aspect, the present application also provides an electro-deintercalation membrane stack, comprising the electro-deintercalation electrode plate described in any of the above embodiments.

[0020] In some embodiments of the present application, the electro-deintercalation membrane stack further includes an electro-deintercalation separator, and the electro-deintercalation electrode plate is abutted between any two adjacent electro-deintercalation separators.

[0021] In a third aspect, the present application also provides a lithium extraction device, comprising the electro-deintercalation membrane stack described in any of the above embodiments.

[0022] Compared with the prior art, the beneficial effects of this application are:

[0023] The present application proposes an electro-deintercalation electrode plate, an electro-deintercalation membrane stack and a lithium extraction device. The electro-deintercalation electrode plate includes an outer frame and a metal mesh electrode piece. The metal mesh electrode piece is arranged on the inner circumference of the outer frame. The two ends of the outer frame along the first direction are respectively provided with a water inlet hole and a water outlet hole. The metal mesh electrode piece and the outer frame are integrally formed. By integrally forming the metal mesh electrode piece and the outer frame, the assembly difficulty of the electro-deintercalation membrane stack is effectively reduced and the assembly efficiency is improved. At the same time, the sealing between the metal mesh electrode piece and the outer frame is guaranteed, so that the material of the outer frame is no longer limited to soft materials such as rubber, silicone and the like, which expands the material selection range of the outer frame and reduces the hardware cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic side view of an electrical deintercalation electrode plate in some embodiments of the present application is shown;

[0026] Figure 2 Shows Figure 1 AA section view;

[0027] Figure 3 Shows Figure 2 A magnified schematic diagram of the structure of the middle B section;

[0028] Figure 4 A schematic diagram of an exploded view of an electro-deintercalation membrane stack in some embodiments of the present application is shown.

[0029] Description of main component symbols:

[0030] 100 - electro-deintercalation electrode plate; 110 - outer frame; 111 - water inlet; 112 - water outlet; 120 - metal mesh electrode; 121 - edge; 122 - middle; 1221 - active material layer; 130 - pole ear; 131 - connection port; 1000 - electro-deintercalation membrane stack; 200 - electro-deintercalation partition. DETAILED DESCRIPTION

[0031] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] Embodiment 1

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, the embodiment of the present application provides an electro-deintercalation electrode plate 100, which is mainly used in an electro-deintercalation membrane stack 1000, and the electro-deintercalation membrane stack 1000 is mainly used in a lithium extraction device. The electro-deintercalation electrode plate 100 includes an outer frame 110 and a metal mesh electrode sheet 120.

[0038] The metal mesh electrode piece 120 is arranged on the inner circumference of the outer frame 110 , and the outer frame 110 is provided with a water inlet hole 111 and a water outlet hole 112 at two ends along the first direction, and the metal mesh electrode piece 120 and the outer frame 110 are integrally formed.

[0039] The electric deintercalation electrode plate 100 provided in the embodiment of the present application is formed by integrally forming the metal mesh electrode sheet 120 and the outer frame 110, which effectively reduces the assembly difficulty of the electric deintercalation membrane stack 1000 and improves the assembly efficiency. At the same time, the sealing between the metal mesh electrode sheet 120 and the outer frame 110 is guaranteed, so that the material of the outer frame 110 is no longer limited to soft materials such as rubber, silicone, etc., which expands the material selection range of the outer frame and reduces the hardware cost.

[0040] In addition, in order to ensure the structural strength and sealing of the outer frame, the thickness of the electrode plate in the prior art is usually designed to be thicker, and the distance between the metal mesh electrode and the ion exchange membrane is larger, resulting in a larger resistance inside the electro-deintercalation membrane stack, reducing the current efficiency, and resulting in a larger amount of outer frame material used, resulting in high material costs.

[0041] Therefore, by integrally forming the metal mesh electrode 120 and the outer frame 110, the structural strength and sealing of the electro-deintercalation electrode plate 100 are improved, so that the thickness of the outer frame 110 can be designed to be thinner. On the one hand, the distance between the metal mesh electrode 120 and the ion exchange membrane is reduced, the resistance in the electro-deintercalation membrane stack 1000 is reduced, and the current efficiency is improved. On the other hand, the amount of material used for the outer frame 110 is reduced, thereby reducing the material cost.

[0042] Exemplarily, the metal mesh pole piece 120 and the outer frame 110 can be integrally formed by molding or injection molding.

[0043] The outer frame 110 can select a suitable material according to the actual slurry situation. For example, the outer frame 110 can be made of rubber, silicone, fluororubber, PVC, PP, PE, PS, ABS, PC, PMMA, PET, epoxy resin, glass fiber, carbon fiber and the like to better adapt to different actual working conditions and expand the scope of application.

[0044] The metal mesh electrode 120 can select suitable materials according to the actual slurry conditions. For example, the metal mesh electrode 120 can be made of titanium, stainless steel, graphite, conductive plastic and other materials to better adapt to different actual working conditions and expand the scope of application.

[0045] It should be noted that the first direction corresponds to Figure 1 , Figure 2 and Figure 3 The X direction in .

[0046] In some embodiments, the water inlet 111 may be disposed at the lower portion of the outer frame 110, and the water outlet 112 may be disposed at the upper portion of the outer frame 110. In other embodiments, the water inlet 111 may be disposed at the upper portion of the outer frame 110, and the water outlet 112 may be disposed at the lower portion of the outer frame 110.

[0047] like Figure 1 As shown, in one embodiment of the present application, optionally, the electro-de-embedding electrode plate 100 further includes a pole ear 130, one end of the pole ear 130 is located in the outer frame 110 and connected to the metal mesh pole piece 120, and the other end of the pole ear 130 is passed through the outer frame 110 and is arranged outside the outer frame 110, and the pole ear 130 and the metal mesh pole piece 120 are integrally formed.

[0048] In this embodiment, one end of the pole ear 130 is disposed in the outer frame 110 and connected to the metal mesh pole piece 120, and the other end of the pole ear 130 is passed through the outer frame 110 and disposed outside the outer frame 110, so that an external power source is electrically connected to the metal mesh pole piece 120 through the pole ear 130, thereby realizing the electrochemical reaction of lithium-rich brine and lithium-poor conductive liquid under conductive conditions.

[0049] By integrally forming the pole ear 130 and the metal mesh pole piece 120 , the pole ear 130 , the metal mesh pole piece 120 and the outer frame 110 are integrally formed, which further reduces the assembly difficulty of the electro-deintercalation membrane stack 1000 and improves the assembly efficiency.

[0050] For example, in some embodiments, the pole tab 130 and the metal mesh pole piece 120 can be integrally formed by welding. In other embodiments, the pole tab 130 and the metal mesh pole piece 120 can be integrally formed by processing from the same sheet material.

[0051] like Figure 1 As shown, in the above embodiment of the present application, optionally, a connection port 131 for connecting a power source is provided at one end of the pole tab 130 away from the metal mesh pole piece 120. Thus, the stability and reliability of the electrical connection between the wire of the external power source and the pole tab 130 are improved, thereby ensuring the stability of the electrochemical reaction of the lithium-rich brine and the lithium-poor conductive liquid under conductive conditions.

[0052] like Figure 1 , Figure 2 and Figure 3As shown, in one embodiment of the present application, optionally, the metal mesh pole piece 120 includes an edge portion 121 and a middle portion 122, the middle portion 122 is located in the inner circumference of the edge portion 121, the edge portion 121 is arranged in the outer frame 110, and the middle portion 122 is arranged in the inner circumference of the outer frame 110. Specifically, the middle portion 122 is integrally formed with the edge portion 121, and the edge portion 121 is arranged in the outer frame 110 and is integrally formed with the outer frame 110.

[0053] like Figure 3 As shown, in the above embodiment of the present application, optionally, active material layers 1221 are provided on two opposite sides of the middle portion 122 along a second direction, and the second direction is perpendicular to the first direction.

[0054] In this embodiment, active material layers 1221 are provided on two opposite sides of the middle portion 122 along the second direction to achieve electrochemical reaction of lithium-rich brine and lithium-poor conductive liquid under conductive conditions.

[0055] Exemplarily, the active material layer 1221 coated on the middle portion 122 may be lithium iron phosphate / ferrous phosphate, lithium vanadium phosphate / vanadium phosphate, lithium manganese phosphate / manganese phosphate, lithium nickel phosphate / nickel phosphate, etc. Taking lithium iron phosphate / ferrous phosphate as an example, it can be understood that: in the same sub-membrane unit, one electro-deintercalation electrode plate 100 is coated with lithium iron phosphate, and the other electro-deintercalation electrode plate 100 is coated with ferrous phosphate.

[0056] It should be noted that the second direction corresponds to Figure 2 and Figure 3 in the Y direction.

[0057] In addition, in order to facilitate the assembly of the edge of the metal mesh electrode piece and the plug-in slot of the outer frame, the electrode plate in the prior art reserves a blank area in the middle part of the metal mesh electrode piece near the edge and the outer frame that is not coated with active material, so that the edge can be plugged into the plug-in slot. This coated blank area forms a channel with low resistance, causing part of the liquid to flow quickly through this gap, affecting the liquid distribution effect.

[0058] Therefore, by integrally molding the metal mesh electrode sheet 120 and the outer frame 110, the edge portion 121 of the metal mesh electrode sheet 120 does not need to be plugged and assembled with the outer frame 110, so that the middle portion 122 of the metal mesh electrode sheet 120 does not need to reserve a blank area without the active material layer 1221 near the edge portion 121 and the outer frame 110, so that the slurry can flow evenly through the metal mesh electrode sheet 120 at the same flow rate everywhere, effectively improving the flow distribution effect.

[0059] like Figure 3As shown, in the above embodiment of the present application, optionally, the thickness of the metal mesh electrode sheet 120 and the electrode tab 130 are both less than the thickness of the outer frame 110. Thus, the wrapping of the metal mesh electrode sheet 120 and the electrode tab 130 by the outer frame 110 is improved, short circuit is prevented, and the overall structural strength of the electrical de-embedding electrode plate 100 is guaranteed.

[0060] like Figure 1 As shown, in any of the above embodiments of the present application, optionally, the shapes of the water inlet 111 and the water outlet 112 are one or more of ellipse, semi-ellipse, circle, semicircle, polygon, etc. The specific design can be based on the actual needs of the device, and will not be listed here.

[0061] Embodiment 2

[0062] like Figure 4 As shown, in the second embodiment of the present application, an electro-deintercalation membrane stack 1000 is further provided, comprising the electro-deintercalation electrode plate 100 described in any one of the above-mentioned first embodiments.

[0063] The electro-deintercalation membrane stack 1000 has the electro-deintercalation electrode plate 100 described in the first embodiment, and thus has all the beneficial effects of the electro-deintercalation electrode plate 100 described in the first embodiment, which will not be described in detail here.

[0064] like Figure 4 As shown, in the above embodiment of the present application, optionally, the electro-deintercalation membrane stack 1000 further includes an electro-deintercalation separator 200 , and the electro-deintercalation electrode plate 100 abuts between any two adjacent electro-deintercalation separators 200 .

[0065] In this embodiment, the electro-deintercalation electrode plate 100 is abutted between any two adjacent electro-deintercalation separators 200 , so that the electro-deintercalation electrode plate 100 and the two adjacent electro-deintercalation separators 200 form an electrode chamber together.

[0066] It can be understood that the electro-deintercalation membrane stack 1000 is composed of an end plate, a guide plate, a gasket, at least one membrane stack unit, a gasket, a guide plate, and an end plate stacked in sequence, and the membrane stack unit is composed of an electro-deintercalation partition 200, an electro-deintercalation electrode plate 100, an electro-deintercalation partition 200, an ion exchange membrane, an electro-deintercalation partition 200, an electro-deintercalation electrode plate 100, an electro-deintercalation partition 200, and an ion exchange membrane stacked in sequence.

[0067] For example, the ion exchange membrane is specifically an anion selective permeable membrane, which only allows monovalent anions to pass through. For reference, the length and width of the ion exchange membrane can be consistent with the electro-deintercalation separator 200 and the electro-deintercalation electrode plate 100 .

[0068] Embodiment 3

[0069] A third embodiment of the present application further provides a lithium extraction device, comprising the electro-deintercalation membrane stack 1000 described in any one of the second embodiments above.

[0070] The lithium extraction device has the electro-deintercalation membrane stack 1000 described in the second embodiment, and thus has all the beneficial effects of the electro-deintercalation membrane stack 1000 described in the second embodiment, which will not be described in detail here.

[0071] In summary, the present application proposes an electro-deintercalation electrode plate 100, an electro-deintercalation membrane stack 1000 and a lithium extraction device. The electro-deintercalation electrode plate 100 includes an outer frame 110 and a metal mesh electrode piece 120. The metal mesh electrode piece 120 is arranged on the inner circumference of the outer frame 110. The outer frame 110 is provided with a water inlet hole 111 and a water outlet hole 112 at both ends along the first direction. The metal mesh electrode piece 120 and the outer frame 110 are integrally formed. By integrally forming the metal mesh electrode piece 120 and the outer frame 110, the assembly difficulty of the electro-deintercalation membrane stack 1000 is effectively reduced, and the assembly efficiency is improved. At the same time, the sealing between the metal mesh electrode piece 120 and the outer frame 110 is guaranteed, so that the material of the outer frame 110 is no longer limited to soft materials such as rubber, silicone and the like, which expands the material selection range of the outer frame material and reduces the hardware cost. At the same time, the structural strength and sealing of the electro-deintercalation electrode plate 100 are also improved, so that the thickness of the outer frame 110 can be designed to be thinner. On the one hand, the distance between the metal mesh electrode sheet 120 and the ion exchange membrane is reduced, the resistance in the electro-deintercalation membrane stack 1000 is reduced, and the current efficiency is improved. On the other hand, the amount of material used for the outer frame 110 is reduced, and the material cost is reduced. In addition, the middle part 122 of the metal mesh electrode sheet 120 does not need to reserve a blank area without an active material layer 1221 near the edge part 121 and the outer frame 110, so that the feed liquid can flow evenly through the metal mesh electrode sheet 120 at the same flow rate everywhere, effectively improving the flow distribution effect.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0073] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An electro-deintercalation electrode plate, characterized in that: include: Outer frame (110); A metal mesh pole piece (120), wherein the metal mesh pole piece (120) is arranged in the inner circumference of the outer frame (110); Wherein, the outer frame (110) is provided with a water inlet hole (111) and a water outlet hole (112) at two ends along the first direction, respectively, and the metal mesh electrode sheet (120) and the outer frame (110) are integrally formed.

2. The electro-deintercalation electrode plate according to claim 1, characterized in that: The electrical de-embedding electrode plate (100) further comprises a pole ear (130), one end of the pole ear (130) being located inside the outer frame (110) and connected to the metal mesh pole piece (120), and the other end of the pole ear (130) being passed through the outer frame (110) and arranged outside the outer frame (110), and the pole ear (130) and the metal mesh pole piece (120) being integrally formed.

3. The electrical deintercalation electrode plate according to claim 2, characterized in that: One end of the pole ear (130) away from the metal mesh pole piece (120) is provided with a wiring port (131) for connecting to a power source.

4. The electro-deintercalation electrode plate according to claim 1, characterized in that: The metal mesh pole piece (120) comprises an edge portion (121) and a middle portion (122), wherein the middle portion (122) is located in the inner circumference of the edge portion (121), the edge portion (121) is arranged in the outer frame (110), and the middle portion (122) is arranged in the inner circumference of the outer frame (110).

5. The electro-deintercalation electrode plate according to claim 4, characterized in that: Active material layers (1221) are disposed on two opposite sides of the middle portion (122) along a second direction, and the second direction is perpendicular to the first direction.

6. The electrical deintercalation electrode plate according to claim 2, characterized in that: The thickness of the metal mesh pole piece (120) and the pole ear (130) are both smaller than the thickness of the outer frame (110).

7. The electric deintercalation electrode plate according to any one of claims 1 to 6, characterized in that: The shapes of the water inlet (111) and the water outlet (112) are one or more of an ellipse, a semi-ellipse, a circle, a semi-circle, and a polygon.

8. An electro-deintercalation membrane stack, characterized in that: The invention comprises the electric deintercalation electrode plate (100) according to any one of claims 1 to 7.

9. The electro-deintercalation membrane stack according to claim 8, characterized in that: The electro-deintercalation membrane stack (1000) further comprises an electro-deintercalation separator (200), and the electro-deintercalation electrode plate (100) is abutted between any two adjacent electro-deintercalation separators (200).

10. A lithium extraction device, characterized in that: An electro-deintercalation membrane stack (1000) comprising any one of claims 8 to 9.

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