Sodium-ion battery pulping equipment, battery slurry and sodium-ion battery

Abstract

The utility model relates to the technical field of battery pulping, in particular to sodium ion battery pulping equipment. The battery pulping equipment comprises a feeding metering system, a side feeding screw rod, a first main screw rod section, a second main screw rod section and a high-speed dispersion tank, a discharging hole of the feeding metering system is connected with a feeding hole of the side feeding screw rod; a discharge hole of the side feeding screw rod is connected with a feed hole of the first section of the main screw rod; a discharge port of the main screw rod section I is connected with a feed port of the main screw rod section II; and a discharge port of the second main screw section is connected with the high-speed dispersion tank through a conveying device. The equipment can be used for preparing high-solid-content positive and negative electrode slurry, the manufacturing cost of a sodium ion battery is reduced, the viscosity of the slurry is more suitable for coating, and the coating energy consumption and the treatment capacity of an NMP recovery system are remarkably reduced. The prepared slurry has the characteristics of high solid content, good dispersity, simplicity and convenience in viscosity regulation and control and the like, and can effectively solve the problems of low production efficiency and non-uniform dispersion caused by switching different main materials in traditional slurry preparation.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery pulping, specifically relates to a sodium ion battery pulping equipment, battery slurry and sodium ion battery. BACKGROUND

[0002] With the growing demand for clean energy and sustainable energy storage worldwide, sodium ion batteries, as a promising electrochemical energy storage technology, have received extensive attention and research. Compared with traditional lithium ion batteries, sodium ion batteries have the advantages of abundant resources and lower cost, and are expected to be widely used in large-scale energy storage, electric vehicles and other fields. However, to achieve high-performance sodium ion batteries, a series of key technical problems need to be solved, among which the stability of the pulping equipment and process is one of the important factors affecting the performance of the battery.

[0003] In the existing sodium ion battery pulping process, a traditional double-planetary mixer is often used, but it usually has the following problems: first, the mixing uniformity is poor, which leads to the uneven distribution of active materials, conductive agents and binders in the slurry; second, the pulping efficiency is low, and the long pulping time (> 4H) greatly increases the production cost of enterprises; third, special glue mixing equipment is required, which occupies a large area; fourth, the low solid content and viscosity of the slurry increase the energy consumption of the coating process.

[0004] In order to solve the above problems, new pulping equipment has emerged in recent years, including high-efficiency pulping equipment and double-screw pulping equipment. However, the high-efficiency pulping equipment also has the problem of being unable to perform high-kneading dry process, which leads to motor torque overload and shutdown, and cannot perform normal cycle pulping. The double-screw pulping equipment often uses a side-feeding combined main screw one-stage kneading and dispersing, but the long main screw in this combination is prone to blockage in actual application, and the same speed of the main screw causes uneven stress distribution in the front and rear ends, which easily causes bending deformation of the screw, making it difficult to replace and clean the screw. SUMMARY

[0005] The utility model aims at realizing the continuous production of sodium ion battery pulping, improving the pulping efficiency, optimizing the pulping process, and realizing the uniform and stable dispersion of the slurry.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The battery slurry preparation device comprises a feeding metering system, a side feeding screw, a first main screw section, a second main screw section and a high-speed dispersion tank; the discharge port of the feeding metering system is connected with the feeding port of the side feeding screw; the discharge port of the side feeding screw is connected with the feeding port of the first main screw section; the discharge port of the first main screw section is connected with the feeding port of the second main screw section; the discharge port of the second main screw section is connected with the high-speed dispersion tank through a conveying device; the side feeding screw comprises a conveying screw element; two or more feeding ports are arranged on the conveying screw element, wherein the feeding port close to the connection part of the first main screw section is used for feeding the conductive slurry and the solvent; the feeding port away from the connection part of the first main screw section is used for feeding the positive active material or the negative active material, the binder and the conductive agent; the rotation speed of the second main screw section is greater than that of the first main screw section.

[0008] Preferably, the feeding metering system comprises a powder bin and a solution bin; feeding metering devices are arranged in the powder bin and the solution bin; the powder bin and the solution bin are connected with the feeding ports of the side feeding screw through hoppers respectively; the powder bin comprises positive and negative active material bins, a binder bin and a conductive agent bin; the solution bin comprises a conductive slurry bin and a solvent bin.

[0009] Preferably, the positive active material comprises one or more of oxides, polyanionic compounds and Prussian blue type positive electrode materials; the oxides comprise one or more of layered oxides; the polyanionic compounds comprise one or more of phosphate, sulfate, silicate and borate.

[0010] Preferably, the negative active material is selected from one or more of carbon-based materials; the carbon-based materials are one or more of graphite, amorphous carbon and nano-carbon.

[0011] Preferably, the binder is selected from one or more of polyvinylidene fluoride (PVDF), sodium carboxymethyl cellulose, polyurethane, polyvinyl alcohol, polyvinylidene fluoride, a copolymer of polyvinylidene fluoride-fluorinated olefin and polymethyl methacrylate (PMMA).

[0012] Preferably, the conductive agent is selected from one or more of carbon black, mesophase carbon microbeads, acetylene black, ketjen black, conductive graphite, conductive carbon fiber, carbon nanotube (CNT), metal powder, carbon fiber, single-walled carbon nanotube and multi-walled carbon nanotube.

[0013] Preferably, the solvent is selected from one or more of N-methyl pyrrolidone, water and benzene-based organic solvents.

[0014] Preferably, the first section of the main screw comprises a first section of main screw motor, a gear transmission box and a reverse conveying screw element; the reverse conveying screw is used for strong reverse extrusion of the material, so that the front area is filled with the material and the kneading effect is increased; and more than one feeding port is arranged on the reverse conveying screw and connected with the discharge port of the side feeding screw part, and a large lead screw element is used for connection.

[0015] Preferably, the second section of the main screw comprises a second section of main screw motor, a gear transmission box and a parallel double screw; the parallel double screw generates strong shearing force at the meshing position and is used for material dispersion.

[0016] Preferably, more than two feeding ports are arranged on the parallel double screw, the feeding port close to the first section of the main screw is connected with the discharge port of the first section of the main screw, and the feeding port away from the first section of the main screw is connected with the feeding bin through a hopper.

[0017] Preferably, the feeding bin comprises a solvent bin and a dispersant bin; a feeding metering device is arranged in the feeding bin.

[0018] Preferably, the conveying device is a pneumatic pump.

[0019] The utility model also provides a battery slurry prepared by the sodium ion battery pulping equipment.

[0020] The utility model also provides a sodium ion battery which contains the above-mentioned battery slurry.

[0021] Compared with the prior art, the utility model has the advantages that:

[0022] (1) the utility model adopts a side feeding system combined with the first section and the second section of the main screw, the side feeding system conveys active substances, adhesives, conductive agents and conductive slurry and other substances to the conveying main screw, the first section of the main screw makes the kneading solid content of the slurry higher and more uniform at a slower speed, the second section of the main screw makes the slurry have a suitable viscosity at a higher shearing speed by adding dispersants or solvents, and finally the slurry is pumped into a dispersion tank for defoaming or high-speed dispersion and standby.

[0023] (2) the equipment can prepare high-solid positive and negative electrode slurry, reduces the manufacturing cost of sodium ion batteries, makes the slurry viscosity more suitable for coating, significantly reduces the coating energy consumption and the processing capacity of the NMP recovery system, and the prepared slurry has the characteristics of high solid content, good dispersibility, simple viscosity control and the like, and can effectively solve the problems of low production efficiency and uneven dispersion caused by switching different main materials in traditional slurry preparation. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a sodium ion battery double-screw pulping equipment diagram.

[0025] Figure 2The schematic view of the second section of the main screw rod in the direction of slurry conveying. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below in combination with examples, but the implementation of the utility model is not limited to this. The specific conditions are not marked in the examples, and the conventional conditions or the conditions recommended by the manufacturer are used. The reagents or instruments used are not marked by the manufacturer, and are conventional products that can be purchased on the market.

[0027] Example 1

[0028] The sodium ion battery pulping equipment provided by the utility model mainly comprises a feeding metering system, a side feeding screw rod, a first section of a main screw rod, a second section of the main screw rod and a high-speed dispersion tank and the like. The feeding metering system mainly comprises powder bins (namely, active material bin 1, adhesive bin 2 and conductive agent bin 3) and solution bins (namely, conductive slurry bin 4 and solvent bin 5). The powder bins and the solution bins of 1-5 are all provided with feeding metering devices (such as electronic induction scales or other forms). 6 and 7 are hoppers respectively used for mixing and conveying the substances in the powder bins and the solution bins to the side feeding screw rod part.

[0029] The side feeding screw rod mainly comprises a side feeding screw rod motor 8, a gear transmission box and a conveying screw rod element, wherein the conveying screw rod element in the side feeding screw rod part is provided with A1, A2 and A3 feeding ports, the A1 feeding port is connected with the hopper 6 connected with the powder bin, and the A3 feeding port is connected with the hopper 7 connected with the solution bin.

[0030] The first section of the main screw rod mainly comprises a first section of a main screw rod motor 9, a gear transmission box and a reverse conveying screw rod element, wherein the reverse conveying screw rod is used for strongly extruding the material in the opposite direction, so that the front area is filled with the material and the kneading effect is increased. The reverse conveying screw rod element in the first section of the main screw rod is provided with B1, B2, B3 and B4 feeding ports, and the B1 feeding port is connected with the discharge port of the side feeding screw rod part. The large lead thread element is used at the joint of the side feeding screw rod and the first section of the main screw rod for improving the conveying efficiency and increasing the surface area, which is more beneficial to exhaust.

[0031] The second section of the main screw rod mainly comprises a second section of a main screw rod motor 10, a gear transmission box and parallel double screw rods, wherein the parallel double screw rods generate strong shearing force at the meshing position and are used for material dispersion. The parallel double screw rods of the second section of the main screw rod are provided with C1, C2, C3 and C4 feeding ports, the C1 feeding port is connected with the discharge port of the first section of the main screw rod, and the C3 feeding port is connected with the hopper 13. The hopper 13 is connected with feeding bins 11 and 12, the feeding bin 11 is a solvent bin, the feeding bin 12 is a dispersant bin, and the feeding bins 11 and 12 are both provided with feeding metering devices.

[0032] The high-speed dispersion tank mainly functions as a backup for vacuum degassing or high-speed dispersion, and the slurry after being dispersed by the second section of the main screw is sent to the high-speed dispersion tank 15 by the pneumatic pump 14.

[0033] A slurry preparation process using the above slurry preparation equipment is provided below, including the following steps:

[0034] (1) The active material, conductive agent and binder are discharged to the side feeding inlet A1 at a certain flow rate through the feeding metering system for dry mixing.

[0035] (2) The solvent and conductive slurry are added to the mixed powder at the side feeding A3 for preliminary infiltration, and a large lead screw element can be used here to improve the conveying efficiency and enhance the powder breathing to facilitate exhaust.

[0036] (3) The mixed powder after infiltration is conveyed to the first section of the main screw through the side feeding motor, and the reverse conveying thread is used for strong reverse extrusion of the material to fill the front area with material and increase the kneading effect.

[0037] (4) The high solid content slurry after kneading is conveyed to the second section of the main screw, and the solid content is adjusted by adding dispersants and solvents at the inlet C3, wherein the parallel double screws generate strong shear force at the meshing part for material dispersion. The rotation speed of the second section of the main screw should be greater than that of the first section of the main screw.

[0038] (5) The dispersed slurry is sent to the dispersion tank by the pneumatic pump for vacuum degassing or high-speed dispersion, and is ready for continuous slurry preparation.

[0039] The slurry prepared by the above equipment and process has the characteristics of high solid content, good dispersion, easy viscosity control, etc., and can effectively solve the problems of low production efficiency and uneven dispersion caused by switching different main materials in traditional slurry preparation.

[0040] The mass ratio of the binder, conductive agent and active material is 85-98:0.5-5:0.5-5.

[0041] The conductive agent is selected from one or more of carbon black, mesophase microspheres, acetylene black, ketjen black, conductive graphite, conductive carbon fiber, carbon nanotube (CNT), metal powder, carbon fiber, single-walled carbon nanotube and multi-walled carbon nanotube.

[0042] The binder is selected from one or more of polyvinylidene fluoride (PVDF), sodium carboxymethyl cellulose, polyurethane, polyvinyl alcohol, polyvinylidene fluoride, copolymer of vinylidene fluoride-fluorinated olefin and polymethyl methacrylate (PMMA).

[0043] The positive electrode active material includes one or more of oxide (layered oxide), polyanion compound (phosphate, sulfate, silicate, borate) and prussian blue type positive electrode material.

[0044] The negative electrode active material is selected from one or more of carbon-based material (graphite, amorphous carbon, nano-carbon). The solvent is selected from one or more of N-methyl pyrrolidone, water, benzene organic solvent.

[0045] The solvent mass ratio in the side feeding is about 20%-60%, and the solvent mass ratio in the second section of the main screw is about 40-70%. The rotation speed of the first section of the main screw is 300-500 rpm, the rotation speed of the second section of the main screw is 400-600 rpm, the slurry in the main screw shows a temperature of 20-50°C, the revolution speed of the dispersion tank is 5-25 rpm, the rotation speed is 500-2500 rpm, the final slurry temperature is adjusted to 25±3°C by opening the cooling water, the vacuum degree is -0.095-0.080 Mpa, the dispersion time is 0H-3H, the slow stirring speed is 25±1 rpm, and the coating is ready for use.

[0046] Example 2

[0047] In this example, a positive electrode slurry is prepared using the slurry preparation equipment described in Example 1, and the preparation steps are as follows:

[0048] (1) The layered oxide, conductive agent (carbon black) and binder (PVDF) are mixed in a mass ratio of 95.4:1.5:2.0, and then discharged into the side feeding A1 inlet through the feeding metering system according to the corresponding flow ratio for dry mixing.

[0049] (2) 45% NMP (N-methyl pyrrolidone) and 0.8% conductive slurry (CNT slurry) are added to the mixed powder in the side feeding A3 to perform preliminary infiltration.

[0050] (3) The infiltrated and mixed powder is transported to the first section of the main screw through the side feeding motor, and is kneaded and dispersed by reverse extrusion through the reverse thread of the first section of the main screw, wherein the rotation speed of the first section of the main screw is 400 rpm, and the slurry temperature is <50°C.

[0051] (4) The kneaded high solid content slurry (solid content ~ 78%) is transported to the second section of the main screw, 55% NMP (N-methyl pyrrolidone) and 0.3% dispersant (polyvinyl pyrrolidone) are added at the screw C3 to adjust the final solid content, wherein the rotation speed of the second section of the main screw is set to 600 rpm for material dispersion, and the slurry temperature is <50°C.

[0052] (5) The dispersed slurry is pumped by pneumatic pump into a dispersion tank for vacuum degassing or high-speed dispersion. The revolution speed of the dispersion tank is set to 25±1 rpm, the cooling water is turned on to adjust the final temperature of the slurry to 25±3℃, the vacuum degree is -0.095~0.080Mpa, and the slow stirring speed is 25 rpm.

[0053] (6) The prepared positive electrode slurry 1 has a kneaded solid content of 78%, a final solid content of 64.5%, a viscosity of 6520 mPa.s, and a fineness of 10 um.

[0054] Example 3

[0055] In this example, a negative electrode slurry is prepared using the slurry preparation equipment described in Example 1, and the preparation steps are as follows:

[0056] (1) The negative electrode material hard carbon, conductive agent (carbon black), and binder (CMC) are mixed in a mass ratio of 94.3:1.5:1.5, and then discharged into the side feeder A1 inlet according to the corresponding flow rate through the feeding metering system for dry mixing.

[0057] (2) 45% of the total amount of deionized water is added to the mixed powder through the side feeder A3 for preliminary soaking.

[0058] (3) The soaked and mixed powder is transported to the main screw section 1 through the side feeder motor and is kneaded and dispersed by reverse extrusion through the reverse screw thread, wherein the rotation speed of the main screw section 1 is 300 rpm, and the slurry temperature is <50℃.

[0059] (4) The kneaded high solid content slurry (solid content ~66%) is transported to the main screw section 2, 55% of deionized water is added at the main screw section 2 C3, and the binder (SBR) is added at the end of the main screw section 2 C5, wherein the rotation speed of the main screw section 2 is set to 500 rpm for material dispersion, and the slurry temperature is <50℃.

[0060] (5) The dispersed slurry is pumped by pneumatic pump into a dispersion tank for vacuum degassing or high-speed dispersion. The revolution speed of the dispersion tank is set to 25±1 rpm, the cooling water is turned on to adjust the final temperature of the slurry to 25±3℃, the vacuum degree is -0.095~0.080Mpa, and the slow stirring speed is 25 rpm.

[0061] (6) The prepared negative electrode slurry 1 has a kneaded solid content of 66%, a final solid content of 50%, a viscosity of 3650 mPa.s, and a fineness of 35 um.

[0062] Comparative Example 1

[0063] In this example, a positive electrode slurry is prepared using the slurry preparation equipment described in Example 1, and the preparation steps are as follows:

[0064] (1) The layered oxide, conductive agent (carbon black), and binder (PVDF) were mixed dry in a ratio of 95.4:1.5:2.0 by mass, and were discharged to the side feeder A1 inlet by the feeding metering system at a corresponding ratio of flow.

[0065] (2) 85% NMP (N-methyl pyrrolidone) and 0.8% conductive slurry (CNT slurry) were added to the mixed powder in the side feeder A3 to perform preliminary infiltration.

[0066] (3) The mixed and infiltrated powder was transported by the side feeder motor to the main screw section 1 and was kneaded and dispersed by reverse extrusion through the reverse screw thread, wherein the rotation speed of the main screw section 1 was 400 rpm, and the slurry temperature was <50°C.

[0067] (4) The kneaded high solid content slurry (solid content ~66%) was transported to the main screw section 2, and 15% NMP (N-methyl pyrrolidone) and 0.3% dispersant (polyvinyl pyrrolidone) were added at the screw C3 to adjust the final solid content, wherein the rotation speed of the main screw section 2 was set to 600 rpm for material dispersion, and the slurry temperature was <50°C.

[0068] (5) The dispersed slurry was pumped to the dispersion tank by the pneumatic pump, vacuum degassing or high-speed dispersion, the revolution speed of the dispersion tank was set to 25±1 rpm, the rotation speed was set to 1200±10 rpm, the cooling water was opened to adjust the final slurry temperature to 25±3°C, the vacuum degree was -0.095~0.080 Mpa, and after 1H of dispersion time, the slow stirring speed was 25 rpm.

[0069] (6) The prepared positive electrode slurry of the comparative example had a kneaded solid content of 66%, a final solid content of 64.5%, a viscosity of 12500 mPa.s, and a fineness of 15 um.

[0070] Comparative Example 2

[0071] A negative electrode slurry was prepared using the slurry preparation equipment described in Example 1, and the preparation steps were as follows:

[0072] (1) The negative electrode material hard carbon, conductive agent (carbon black), and binder (CMC) were mixed dry in a ratio of 94.3:1.5:1.5 by mass, and were discharged to the side feeder A1 inlet by the feeding metering system at a corresponding ratio of flow.

[0073] (2) 80% deionized water was added to the mixed powder in the side feeder A3 to perform preliminary infiltration.

[0074] (3) The mixed powder is fed to the main screw section 1 by the side feeding motor and is extruded in the reverse direction by the reverse conveying thread to knead and disperse, wherein the rotation speed of the main screw section 1 is 300 rpm, and the slurry temperature is less than 50℃.

[0075] (4) The kneaded high solid content slurry (solid content ~ 56%) is fed to the main screw section 2, 20% deionized water is added at the main screw section 2 C3, and the adhesive (SBR) is added at the end of the main screw section 2 C5, wherein the rotation speed of the main screw section 2 is set to 500 rpm for material dispersion, and the slurry temperature is less than 50℃.

[0076] (5) The dispersed slurry is pumped into the dispersion tank by the pneumatic pump to be vacuum degassed or high-speed dispersed, the revolution speed of the dispersion tank is set to 25±1 rpm, the cooling water is opened to adjust the final slurry temperature to 25±3℃, the vacuum degree is -0.095~0.080 Mpa, and the slow stirring speed is 25 rpm.

[0077] (6) The prepared negative electrode slurry 1 has a kneading solid content of 54%, a final solid content of 50%, a viscosity of 2540 mPa.s, and a fineness of 38 um.

[0078] The kneading solid content, discharge solid content, discharge viscosity, and discharge fineness of the positive and negative electrode slurries prepared in Comparative Examples 2-3 and Comparative Examples 1-2 are obtained.

[0079]

[0080] As can be seen from the data in the table, the kneading solid content of the positive and negative electrode slurries prepared by the device is significantly improved, and the discharge viscosity and solid content can meet the coating production requirements, indicating that the device has excellent dispersion function for the preparation of sodium ion battery slurry, and can be compatible with multiple main materials switching. For coating, it can reduce the coating energy consumption and reduce the overall production cost of sodium ion battery.

[0081] The above-described embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the present application. It should be noted that for ordinary skilled persons in the art, other various corresponding changes and modifications can be made according to the above-described technical solutions and concepts, and all these changes and modifications should belong to the protection scope of the present application claims.

Claims

1. A sodium-ion battery slurry making apparatus, characterized by, The device comprises a feeding metering system, a side feeding screw, a first section of main screw, a second section of main screw and a high-speed dispersion tank. The outlet of the feeding metering system is connected with the inlet of the side feeding screw; the outlet of the side feeding screw is connected with the inlet of the first section of main screw; the outlet of the first section of main screw is connected with the inlet of the second section of main screw; the outlet of the second section of main screw is connected with the high-speed dispersion tank through a conveying device. The side feeding screw comprises a conveying screw element; two or more inlets are arranged on the conveying screw element, wherein the inlets close to the part connected with the first section of main screw are used for feeding conductive slurry and solvent; the inlets far away from the part connected with the first section of main screw are used for feeding positive active material or negative active material, binder and conductive agent. The rotation speed of the second section of main screw is greater than that of the first section of main screw.

2. The pulping apparatus of claim 1, wherein, The feeding metering system comprises a powder bin and a solution bin; feeding metering devices are arranged in the powder bin and the solution bin; the powder bin and the solution bin are connected with the inlets of the side feeding screw through hoppers respectively. The powder bin comprises positive and negative active material bins, a binder bin and a conductive agent bin. The solution bin comprises a conductive slurry bin and a solvent bin.

3. The pulping apparatus of claim 1, wherein, The positive active material comprises one or more of oxides, polyanionic compounds and Prussian blue positive materials; the oxides comprise one or more of layered oxides; the polyanionic compounds comprise one or more of phosphate, sulfate, silicate and borate. The negative active material is selected from one or more of carbon-based materials; the carbon-based materials are one or more of graphite, amorphous carbon and nano-carbon.

4. The pulping apparatus of claim 2, wherein, The binder is selected from one or more of polyvinylidene fluoride (PVDF), sodium carboxymethyl cellulose, polyurethane, polyvinyl alcohol, polyvinylidene fluoride, copolymer of vinylidene fluoride-fluorinated olefin and polymethyl methacrylate (PMMA). The conductive agent is selected from one or more of carbon black, mesophase carbon microbeads, acetylene black, ketjen black, conductive graphite, conductive carbon fiber, carbon nanotube (CNT), metal powder, carbon fiber, single-walled carbon nanotube and multi-walled carbon nanotube. The solvent is selected from one or more of N-methyl pyrrolidone, water and benzene organic solvent.

5. The pulping apparatus of claim 1, wherein, The first section of main screw comprises a first section of main screw motor, a gear transmission box and a reverse conveying screw element; the reverse conveying screw is used for strong reverse extrusion of the material, so that the front area is filled with the material and the kneading effect is increased. One or more inlets are arranged on the reverse conveying screw and connected with the outlet of the side feeding screw part; a large lead thread element is used for the connection part.

6. The pulping apparatus of claim 1, wherein, The second section of main screw comprises a second section of main screw motor, a gear transmission box and parallel double screws; the parallel double screws generate strong shear force at the meshing part and are used for material dispersion. Two or more inlets are arranged on the parallel double screws; the inlets close to the first section of main screw are connected with the outlet of the first section of main screw; the inlets far away from the first section of main screw are connected with the feeding bin through a hopper.

7. A pulping apparatus according to claim 6, characterised in that The feeding bin comprises a solvent bin and a dispersant bin; feeding metering devices are arranged in the feeding bin.

8. The pulping apparatus of claim 1, wherein, The conveying device is a pneumatic pump.

9. A battery slurry prepared by using the sodium ion battery slurry preparation device according to any one of claims 1-8.

10. A sodium-ion battery, characterized in that, A battery slurry comprising the battery slurry of claim 9.

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