Thin electrode support body structure for all-vanadium redox flow battery

Abstract

The utility model relates to the technical field of all-vanadium redox flow batteries, in particular to a thin electrode supporting body structure for an all-vanadium redox flow battery. Comprising a high-conductivity support body, an inclined through groove, a triangular prism, a groove and a thin electrode. Wherein the inclined through grooves are formed in the high-conductivity supporting body and are integrally in a triangular wave shape, the triangular prisms are arranged on the high-conductivity supporting body and are alternately distributed with the inclined through grooves in a linear array mode, the grooves are formed in the triangular prisms to serve as flow channels, and the thin electrodes are inserted into all the inclined through grooves in a penetrating mode and wrap the triangular prisms. The thin electrode support body structure increases the use area of the electrode, increases the contact area between the electrode and the high-conductivity support body, increases the contact area between the electrode and the bipolar plate, can significantly increase the reaction area of the electrode, reduces the electron transfer resistance, and improves the battery efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of all-vanadium redox flow battery, in particular to a thin electrode support structure for all-vanadium redox flow battery. BACKGROUND

[0002] All-vanadium redox flow battery is composed of a stack, electrolyte storage tank, pump and pipeline. The stack includes a plurality of unit cells, each unit cell is composed of two electrodes and an ion exchange membrane between the two. The electrolyte is circulated from the storage tank to the stack by the pump for reaction. Its working principle is that the oxidation and reduction reaction of vanadium ions in the positive and negative electrolyte occurs during charging and discharging. The electrode material of all-vanadium redox flow battery is usually carbon-based material, such as: graphite felt, carbon paper, carbon cloth, etc. These materials not only conduct electrons, but also provide a reaction site, and are one of the core components of all-vanadium redox flow battery.

[0003] In order to improve the performance of the battery, the existing electrode of all-vanadium redox flow battery has a thinning trend, but the electrode will greatly reduce the electrode reaction area after thinning, and the electrode will reduce the contact area with the bipolar plate after thinning, increase the contact resistance, and thus affect the optimal performance of the battery. CONTENT OF THE INVENTION

[0004] In order to increase the electrode reaction area and reduce the contact resistance, the thin electrode support structure for all-vanadium redox flow battery provided by the present application adopts the following technical scheme:

[0005] A thin electrode support structure for all-vanadium redox flow battery. It includes a high-conductivity support body, an inclined through groove, a triangular prism, a groove, and a thin electrode. The inclined through groove is arranged on the high-conductivity support body in a whole triangular wave shape, the triangular prism is arranged on the high-conductivity support body and is distributed in a linear array alternately with the inclined through groove, the groove is arranged on the triangular prism as a flow channel, and the thin electrode is inserted into all the inclined through grooves and covers the triangular prism.

[0006] Preferably, the high-conductivity support body substrate is one of a graphite plate and a carbon plastic plate.

[0007] Preferably, the high-conductivity support body is a cuboid.

[0008] Preferably, the inclined through groove is opened on the high-conductivity support body.

[0009] Preferably, the inclined through groove penetrates the upper and lower visible surfaces of the high-conductivity support body.

[0010] Preferably, the inclined through groove is a plurality of inclined through grooves, and the plurality of inclined through grooves as a whole presents a triangular wave shape from the front view of the high-conductivity support body.

[0011] Preferably, the three-prism is opened on the high-conductivity support body.

[0012] Preferably, the three-prism is multiple, and the multiple three-prisms and the multiple inclined through-slots are alternately distributed in linear array.

[0013] Preferably, the groove is opened on the three-prism as an electrolyte flow channel.

[0014] Preferably, the groove is three-prism-shaped.

[0015] Preferably, the groove penetrates the front view surface of the high-conductivity support body and does not penetrate the rear view surface of the high-conductivity support body.

[0016] Preferably, the thin electrode is one of carbon cloth and graphite felt.

[0017] Preferably, the thin electrode is inserted into all the inclined through-slots and covers the three-prism.

[0018] In summary, the present application includes at least one of the following beneficial technical effects:

[0019] 1. By inserting the thin electrode into all the inclined through-slots and covering the three-prism, the use area of the electrode is increased, thereby increasing the reaction area of the electrode and improving the efficiency of the battery.

[0020] 2. By using the high-conductivity support body and opening the inclined through-slots on the high-conductivity support body for the thin electrode to be inserted into, the area of the thin electrode and the high-conductivity support body is increased, the electronic transfer resistance is reduced, and the efficiency of the battery is improved.

[0021] 3. By opening the groove on the high-conductivity support body as an electrolyte flow channel, the bipolar plate with a flow channel is replaced, the contact area of the thin electrode and the bipolar plate is increased, the contact resistance of the thin electrode and the bipolar plate is reduced, and the efficiency of the battery is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the high-conductivity support body of Embodiment 1 of the present application;

[0023] Figure 2 is a front view of the thin electrode of Embodiment 1 of the present application;

[0024] Figure 3 is a front view of the high-conductivity support body of Embodiment 1 of the present application;

[0025] Figure 4 is a cross-sectional view of the front view surface of the high-conductivity support body of Embodiment 1 of the present application;

[0026] Figure 5 is a rear view of the high-conductivity support body of Embodiment 1 of the present application;

[0027] Figure 6 is the top view of the high-conductivity support body of the embodiment 1 of the present application;

[0028] Figure 7 is the bottom view of the high-conductivity support body of the embodiment 1 of the present application;

[0029] Figure 8 is the schematic diagram of the overall structure of the thin electrode penetrating into the high-conductivity support body of the embodiment 1 of the present application;

[0030] Figure 9 is the front view cross-sectional diagram of the thin electrode penetrating into the high-conductivity support body of the embodiment 1 of the present application;

[0031] Legend: 1, high-conductivity support body; 2, inclined through groove; 3, triangular prism; 4, recess; 5, thin electrode. DETAILED DESCRIPTION

[0032] The following will be described in detail in combination with the accompanying drawings. Figures 1-7 The present application will be further described in detail.

[0033] Embodiment 1: according to the following scheme

[0034] With reference to Figure 1 , Figure 2 , a thin electrode support body structure for a vanadium redox flow battery includes a high-conductivity support body 1, an inclined through groove 2, a triangular prism 3, a recess 4, and a thin electrode 5. The base material of the high-conductivity support body 1 is a graphite plate, and is arranged in a cuboid shape with a size of 100 mm x 50 mm x 2.4 mm.

[0035] With reference to Figure 1 , Figure 4 , the inclined through groove 2 is arranged on the high-conductivity support body 1, penetrating the top view and the bottom view of the high-conductivity support body 1, and is arranged in a parallelepiped shape. The number of inclined through grooves 2 is 50, and the inclined through grooves 2 as a whole present a triangular wave shape. Figure 4

[0036] With reference to Figure 1 , Figure 4 , the triangular prism 3 is arranged on the high-conductivity support body 1 and is alternately distributed in a linear array with the inclined through groove 2. The number of triangular prisms 3 is 51.

[0037] With reference to Figure 1 , Figure 6 , Figure 7 , the recess 4 is arranged on the triangular prism 1 as an electrolyte flow channel, and the recess 4 is arranged in a triangular prism shape. The number of recesses 4 is 51. With reference to Figure 3 , Figure 5 ​The groove 4 penetrates the front surface of the high-conductivity support 1, but does not penetrate the back surface of the high-conductivity support 1.

[0038] With reference to Figure 2 , Figure 8 , Figure 9 The thin electrode 5 is carbon cloth, which is inserted into all the inclined penetrating grooves 2 and covers the triangular prism 3.

[0039] Example 2: The base material of the high-conductivity support 1 in Example 1 is carbon plastic plate, the thin electrode 5 is carbon cloth, and other conditions are the same as those in Example 1.

[0040] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, and therefore: any equivalent changes made on the basis of the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A thin electrode support structure for a vanadium redox flow battery, characterized by: The application relates to a high-conductivity support body (1), an inclined through groove (2), a triangular prism (3), a groove (4) and a thin electrode (5), wherein the inclined through groove (2) is arranged on the high-conductivity support body (1) and has a whole triangular wave shape, the triangular prism (3) is arranged on the high-conductivity support body (1) and is linearly and alternately distributed with the inclined through groove (2), the groove (4) is arranged on the triangular prism (3) as a flow channel, and the thin electrode (5) is inserted into all the inclined through grooves (2) and covers the triangular prism (3).

2. The thin electrode support structure for a vanadium redox flow battery according to claim 1, characterized by: The high-conductivity support body (1) is made of one of a graphite plate and a carbon plastic plate; and the high-conductivity support body (1) is in the shape of a cuboid.

3. The thin electrode support structure for a vanadium redox flow battery according to claim 1, characterized by: The inclined through groove (2) is arranged on the high-conductivity support body (1); the inclined through groove (2) penetrates the upper and lower visual surfaces of the high-conductivity support body (1); the inclined through groove (2) is a plurality of grooves, and the plurality of inclined through grooves (2) have a whole triangular wave shape in the front view of the high-conductivity support body (1).

4. The thin electrode support structure for a vanadium redox flow battery according to claim 1, characterized by: The triangular prism (3) is arranged on the high-conductivity support body (1); the triangular prism (3) is a plurality of prisms, and the plurality of triangular prisms (3) are linearly and alternately distributed with the plurality of inclined through grooves (2).

5. The thin electrode support structure for a vanadium redox flow battery of claim 1, wherein: The groove (4) is arranged on the triangular prism (3) as an electrolyte flow channel; the groove (4) is in the shape of a triangular prism; and the groove (4) penetrates the front visual surface of the high-conductivity support body (1) but does not penetrate the rear visual surface of the high-conductivity support body (1).

6. The thin electrode support structure for a vanadium redox flow battery of claim 1, wherein: The thin electrode (5) is made of one of carbon cloth and graphite felt; and the thin electrode (5) is inserted into all the inclined through grooves (2) and covers the triangular prism (3).

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