CN218215383U

CN218215383U - Membrane electrode assembly based on high-strength low-resistance ion exchange membrane

Info

Publication number: CN218215383U
Application number: CN202222401240.5U
Authority: CN
Inventors: 林森
Original assignee: Shandong Shengwan New Energy Technology Development Co ltd
Current assignee: Shandong Shengwan New Energy Technology Development Co ltd
Priority date: 2022-09-09
Filing date: 2022-09-09
Publication date: 2023-01-03
Anticipated expiration: 2032-09-09

Abstract

The utility model relates to a membrane electrode assembly technical field, specifically be a membrane electrode assembly based on high strength low resistance ion exchange membrane, this membrane electrode assembly based on high strength low resistance ion exchange membrane, the effective area of contact of wave type structure that its ion exchange membrane body adopted can increase and electrolyte, make the discharge rate that the electric current produced further improve, and the ascending C type limiting plate of opening that this structure adopted can further avoid the condition that electrolyte infiltration spills downwards, the sealed apron of cooperation can be convenient for assemble and disassemble this structure, the graphite felt that the corrosion-resistant layer adopted is a better electrode material, good electric conductive property and acid-resistant strong oxidation nature have, this membrane electrode assembly has further hindered electrolyte direct contact current collector when playing the electrically conductive effect through corrosion-resistant layer and current conducting plate, the better condition of avoiding current collector by corrosion damage, further improve the life of this structure.

Description

Membrane electrode assembly based on high-strength low-resistance ion exchange membrane

Technical Field

The utility model relates to a membrane electrode assembly technical field specifically is a membrane electrode assembly based on high strength low resistance ion exchange membrane.

Background

The ion exchange membrane is a polymer membrane which contains ionic groups and has selective permeability to ions in a solution. Since its ion permselectivity is generally mainly utilized in application, it is also referred to as an ion permselective membrane.

The electrochemical flow battery is a new storage battery, the flow battery is a high-performance storage battery which utilizes the separation of positive and negative electrolytes and respective circulation, has the characteristics of high capacity, wide application field and long cycle service life, and is a new energy product at present.

The flow cell is like an electrochemical cell, except that the ionic solution is not stored in the cell around the electrode, the ionic solution is stored outside the cell and can be supplied to the cell for generating electricity, the total amount of electricity which can be generated depends on the amount of the ionic solution in the storage tank, the flow cell comprises an ion exchange membrane which generates ion exchange, a positive electrode and a negative electrode and an electrolyte which is the ionic solution, wherein the effective ion exchange area directly influences the discharge rate generated by current, the existing ion exchange membrane adopts a flat plate type structure, besides, the existing membrane electrode structure is inconvenient to assemble and disassemble, and the electrolyte is easy to corrode metal parts such as conductive plates, so that the current conversion efficiency can be improved, and the corrosion of the electrolyte to the metal parts in the conductive plates can be reduced. In view of this, we propose a membrane electrode assembly based on a high-strength low-resistance ion exchange membrane.

SUMMERY OF THE UTILITY MODEL

In order to make up for the defects, the utility model provides a membrane electrode assembly based on a high-strength low-resistance ion exchange membrane.

The technical scheme of the utility model is that:

the membrane electrode assembly based on the high-strength low-resistance ion exchange membrane comprises a fixed protection assembly, wherein a conductive plate is arranged inside the fixed protection assembly, a corrosion-resistant layer is arranged on the conductive plate, and an ion exchange membrane body capable of increasing the effective contact area of the surface is arranged inside the fixed protection assembly.

Preferably, the fixed protection component comprises a C-shaped limiting plate with an upward opening, and a current collecting plate electrically connected with an external lead is fixedly mounted on the outer side of the C-shaped limiting plate.

Preferably, the inner side face of the C-shaped limiting plate is coated with an insulating material.

Preferably, the inner side surface of the current collecting plate is fixedly connected with a current conducting plate, and an inserting groove and a lug are arranged above the current conducting plate.

Preferably, a sealing cover plate is detachably mounted above the conductive plate, and an insertion block and a groove which respectively correspond to the insertion groove and the projection are arranged on the sealing cover plate.

Preferably, the inner side surface of the conductive plate is provided with a groove structure which can increase the fixing effect and is uniformly distributed, and the inner side surface of the conductive plate is fixedly connected with a corrosion-resistant layer.

Preferably, the corrosion-resistant layer adopts a graphite felt structure, the corrosion-resistant layer comprises a contact surface on the inner side surface, and the surface of the contact surface is provided with a plurality of hemispheres which are uniformly distributed.

Preferably, a first liquid injection cavity and a second liquid injection cavity which can respectively inject positive and negative electrolyte are formed between the corrosion-resistant layers on the two sides and the ion exchange membrane body.

Preferably, the ion exchange membrane body is of a continuous wave-shaped structure.

Preferably, the ion exchange membrane body both sides fixedly connected with mounting panel, the ion exchange membrane body is installed through both sides mounting panel detachably the inside intermediate position department of C type limiting plate.

Compared with the prior art, the beneficial effects of the utility model are that:

this membrane electrode assembly based on high strength low resistance ion exchange membrane, the effective area of contact with electrolyte can be increased to the wave type structure that its ion exchange membrane body adopted, make the discharge rate that the electric current produced further improve, and the ascending C type limiting plate of opening that this structure adopted can further avoid the condition that electrolyte infiltration spills downwards, this structure can be convenient for assemble and disassemble to the cooperation sealed apron, the graphite felt that corrosion-resistant layer adopted is a better electrode material, it has good electric conductivity nature and acidproof strong oxidation nature, and the graphite felt can obviously reduce resistance after thermal treatment, be favorable to reinforcing electrochemical activity, in addition, this membrane electrode assembly has further hindered electrolyte direct contact collector plate when playing the electrically conductive effect through corrosion-resistant layer and current conducting plate, better avoid the condition that collector plate is corroded the damage, further improve the life of this structure.

Drawings

FIG. 1 is a sectional exploded view of the overall structure of the present invention;

FIG. 2 is a schematic view of the inside of the present invention;

FIG. 3 is a schematic view of a part of the structure of the present invention;

FIG. 4 is a schematic view of the corrosion-resistant layer of the present invention;

FIG. 5 is a schematic view of the ion exchange membrane of the present invention.

The meaning of the individual reference symbols in the figures is:

1. fixing the protection component; 11. a C-shaped limiting plate; 12. a collector plate;

2. a conductive plate; 21. inserting grooves; 22. a bump;

3. a corrosion-resistant layer; 31. a contact surface;

4. an ion exchange membrane body; 41. mounting a plate;

5. sealing the cover plate; 51. a groove; 52. an insertion block;

6. a first liquid injection chamber; 7. and a second liquid injection cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Referring to fig. 1-5, the present invention details the above technical solution by the following embodiments:

the utility model provides a membrane electrode assembly based on high strength low resistance ion exchange membrane, includes fixed protection subassembly 1, and fixed protection subassembly 1 is inside to be equipped with current conducting plate 2, is equipped with corrosion-resistant layer 3 on the current conducting plate 2, and fixed protection subassembly 1 is inside to be equipped with the ion exchange membrane body 4 that can increase surperficial effective area of contact.

The fixed protection component 1 comprises a C-shaped limiting plate 11 with an upward opening, a current collecting plate 12 electrically connected with an external lead is fixedly arranged on the outer side of the C-shaped limiting plate 11, and the current collecting plate 12 can conduct the internal and external circuits of the pile and conduct current.

And the inner side surface of the C-shaped limiting plate 11 is coated with an insulating material, so that the inner shell is prevented from being electrified.

The current collector 12 medial surface fixedly connected with current conducting plate 2, current conducting plate 2 top is equipped with inserting groove 21 and lug 22, and sealed apron 5 is installed to current conducting plate 2 top detachably, is equipped with on the sealed apron 5 with inserting groove 21 and lug 22 respectively corresponding grafting piece 52 and recess 51, this structure prevents that electrolyte from permeating, uses the sealed gap of conductive silica gel in this embodiment.

The inner side surface of the conductive plate 2 is provided with a groove structure which can increase the fixing effect and is uniformly distributed, the inner side surface of the conductive plate 2 is fixedly connected with a corrosion-resistant layer 3, the corrosion-resistant layer 3 comprises a contact surface 31 at the inner side surface, and the surface of the contact surface 31 is provided with a plurality of hemispheres which are uniformly distributed.

It is worth to be noted that, the corrosion-resistant layer 3 of this embodiment adopts a graphite felt structure, and the graphite felt has good conductivity, mechanical uniformity, electrochemical activity, acid resistance and strong oxidation resistance, is a better electrode material, and is more suitable for research and application of a flow battery compared with a graphite rod and various powder materials.

A first liquid injection cavity 6 and a second liquid injection cavity 7 which can respectively inject positive and negative electrolyte are formed between the corrosion-resistant layers 3 on the two sides and the ion exchange membrane body 4, and the positive and negative electrolyte are respectively injected into the first liquid injection cavity 6 and the second liquid injection cavity 7 and then pass through the ion exchange membrane body 4 to realize ion exchange.

The ion exchange membrane body 4 is of a continuous wave-shaped structure, so that the contact area with the positive and negative electrolytes can be increased, and the exchange rate is improved.

4 both sides fixedly connected with mounting panel 41 of ion exchange membrane body, ion exchange membrane body 4 passes through both sides mounting panel 41 detachably and installs in the inside intermediate position department of C type limiting plate 11 for the electrolyte space size of filling is unanimous.

In the embodiment of the membrane electrode assembly based on the high-strength low-resistance ion exchange membrane, when the membrane electrode assembly is used, positive and negative electrolyte is respectively injected into the first electrolyte injection cavity 6 and the second electrolyte injection cavity 7, because the ion exchange membrane body 4 is of a continuous wave-shaped structure, the effective contact area with the positive and negative electrolyte can be increased, the ion exchange rate is further improved, the resistance can be effectively reduced through the modified corrosion-resistant layer 3, and meanwhile, the graphite felt has good corrosion resistance, so that the back side conductive plate 2 can be protected from being corroded firstly, the current collecting plate 12 fixedly connected to the outer side of the conductive plate 2 can play a role in conducting circuits inside and outside the pile and conducting current, at the moment, the conductive plate 2 plays a role in separating and corrosion resisting of the second layer, the outer current collecting plate 12 is further protected from contacting with the electrolyte, the service life of the whole body is prolonged, and in the embodiment, the resistance of the treated graphite felt is reduced, so that the graphite felt material can be modified, the resistance is reduced, and the electrochemical activity is enhanced

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A membrane electrode assembly based on a high-strength low-resistance ion exchange membrane comprises a fixed protection assembly (1) and is characterized in that: the ion exchange membrane is characterized in that a conductive plate (2) is arranged inside the fixed protection assembly (1), a corrosion-resistant layer (3) is arranged on the conductive plate (2), and an ion exchange membrane body (4) capable of increasing the effective contact area of the surface is arranged inside the fixed protection assembly (1).

2. The high strength low resistance ion exchange membrane based membrane electrode assembly of claim 1 wherein: fixed protection subassembly (1) is including being C type limiting plate (11) that the opening is ascending, C type limiting plate (11) outside fixed mounting has current collecting plate (12) of being connected with external wire electricity.

3. The high strength low resistance ion exchange membrane based membrane electrode assembly of claim 2 wherein: and the inner side surface of the C-shaped limiting plate (11) is coated with an insulating material.

4. The high strength low resistance ion exchange membrane based membrane electrode assembly of claim 2 wherein: the inner side face of the collector plate (12) is fixedly connected with a conductive plate (2), and an inserting groove (21) and a lug (22) are arranged above the conductive plate (2).

5. The high strength low resistance ion exchange membrane based membrane electrode assembly of claim 4 wherein: a sealing cover plate (5) is detachably mounted above the conductive plate (2), and an inserting block (52) and a groove (51) which respectively correspond to the inserting groove (21) and the protruding block (22) are arranged on the sealing cover plate (5).

6. The high strength low resistance ion exchange membrane based membrane electrode assembly of claim 4 wherein: the inner side surface of the conductive plate (2) is provided with a groove structure which can increase the fixing effect and is uniformly distributed, and the inner side surface of the conductive plate (2) is fixedly connected with a corrosion-resistant layer (3).

7. The high strength low resistance ion exchange membrane based membrane electrode assembly of claim 6 wherein: the corrosion-resistant layer (3) adopts a graphite felt structure, the corrosion-resistant layer (3) comprises a contact surface (31) on the inner side surface, and a plurality of hemispheres which are uniformly distributed are arranged on the surface of the contact surface (31).

8. The high strength low resistance ion exchange membrane based membrane electrode assembly of claim 3 wherein: a first liquid injection cavity (6) and a second liquid injection cavity (7) which can respectively inject positive and negative electrolyte are formed between the corrosion-resistant layers (3) on the two sides and the ion exchange membrane body (4).

9. The high strength low resistance ion exchange membrane based membrane electrode assembly of claim 1 wherein: the ion exchange membrane body (4) is of a continuous wave-shaped structure.

10. The high strength low resistance ion exchange membrane based membrane electrode assembly of claim 2 wherein: ion exchange membrane body (4) both sides fixedly connected with mounting panel (41), ion exchange membrane body (4) are installed through both sides mounting panel (41) detachably C type limiting plate (11) inside intermediate position department.