A manufacturing apparatus for negative electrode plates using slurry materials with an electrostatic spray gun.

Abstract

This invention provides a manufacturing apparatus for negative electrode plates using a slurry material with an electrostatic spray gun. [Solution] The system comprises a raw material tank 10, an electrostatic spray gun 30 connected to the raw material tank, a roller belt structure 60, and a heater 40 connected to the roller belt structure. The negative electrode plate, on which a negative electrode slurry layer is formed by the negative electrode slurry material 100, does not need to undergo baking and compaction steps. Each negative electrode slurry material includes a plurality of negative electrode particles for storing or releasing lithium ions, thermoplastic PEO, CMC, a plurality of conductive agents, a lithium salt, and a plurality of ceramic particles for guiding lithium ions. The negative electrode slurry material exhibits a solid material structure at room temperature, and when heated to a specific temperature, the PEO in the negative electrode slurry material melts to form a molten state.

Description

Technical Field

[0001] The present invention relates to a negative electrode plate, and more particularly to an apparatus for manufacturing a negative electrode plate using a slurry material with an electrostatic spray gun.

Background Art

[0002] Conventional negative materials include a negative electrode comprising a negative electrode substrate and a negative electrode slurry layer coated on the negative electrode substrate, and the negative electrode slurry layer is composed of a negative electrode slurry. The negative electrode slurry includes a plurality of negative electrode particles for storing or releasing lithium ions, a polymer material including CMC (carboxymethyl cellulose), a solvent for dispersing the materials in the negative electrode slurry, a plurality of conductive agents, and a plurality of ceramic particles for guiding lithium ions so as to disperse channels of lithium ions.

Summary of the Invention

Problems to be Solved by the Invention

[0003] In the prior art, the manufacturing method for producing the negative electrode slurry involves adding a solvent so that the materials in the negative electrode slurry are sufficiently uniformly dispersed, and then applying the solvent-containing negative electrode slurry to the negative electrode substrate, followed by baking to remove the solvent. However, the conventional method is relatively simple and has the following drawbacks. First, during the baking process, the uniformity of the slurry, which was originally prepared uniformly, may be destroyed due to the uneven evaporation rate at each point. Also, due to the evaporation of the solvent, pores may fill the negative electrode slurry layer that is finally obtained, and compaction is required to ensure that the negative electrode slurry layer and the negative electrode substrate are tightly bonded. This not only increases the cost of the manufacturing method, but the high compaction pressure may also cause the powder, which was originally designed for this process, to be crushed and burst, affecting the final properties. Furthermore, such a solvent-containing negative electrode slurry needs to be applied directly to the negative electrode substrate after manufacturing is complete. The manufacturing of the negative electrode slurry and the negative electrode substrate using this method must be completed simultaneously, and since wet negative electrode slurry has a short shelf life, the manufacturing locations for the negative electrode slurry and the negative electrode substrate were limited. Furthermore, the recovery of the evaporated solvent also contributed to increased costs.

[0004] Therefore, there is a need to develop a manufacturing apparatus for negative electrode plates using slurry materials with a novel electrostatic spray gun that solves the shortcomings of the aforementioned prior art.

[0005] This invention was developed through diligent research by the inventor in view of the above-mentioned problems, and its purpose is to provide an apparatus for manufacturing negative electrode plates using a slurry material with an electrostatic spray gun.

[0006] In other words, because the particles of each negative electrode slurry material are extremely fine, when the negative electrode slurry material is sprayed from the electrostatic spray gun onto the carrier plate, the negative electrode slurry material particles are attracted to each other by the action of static electricity, resulting in a high bulk density. This forms a negative electrode plate with a high energy density, further increasing the lithium conduction energy. Furthermore, since the negative electrode slurry material and the negative electrode substrate are manufactured completely separately in this invention, the negative electrode plate is not subject to the limitation of needing to be manufactured simultaneously, as in the conventional negative electrode slurry and negative electrode substrate. This makes it convenient to obtain the slurry material, allows for storage at room temperature, and provides greater flexibility in the manufacturing of the negative electrode plate. In addition, since general negative electrode slurries contain solvents, when the general negative electrode slurry is applied to the negative electrode substrate, there are subsequent baking and rolling processes to form a negative electrode slurry layer that adheres to the negative electrode substrate. Such methods were costly. The slurry material is bonded to the negative electrode substrate by utilizing the property that the PEO melts at high temperatures. Since no solvent is needed to bond to the negative electrode substrate, baking and compaction processes are unnecessary, reducing manufacturing costs. Furthermore, the negative electrode slurry layer applied in this manner has an average thickness, high bulk density, and further forms a high-density energy electrode plate. [Means for solving the problem]

[0007] To achieve the above objective, an apparatus for manufacturing a negative electrode plate using a slurry material with an electrostatic spray gun, which is one aspect of the present invention, comprises a negative electrode substrate and a negative electrode slurry layer bonded to the negative electrode substrate. The negative electrode slurry layer is composed of the negative electrode slurry material. The negative electrode slurry material is solid at room temperature, and by independently manufacturing such a slurry-like negative electrode slurry, the negative electrode substrate and the negative electrode slurry material can be manufactured separately. Since the negative electrode slurry material is a solvent-free solid, it has a long shelf life and can be stored at room temperature. The structure is a raw material tank for containing the negative electrode slurry material, the negative electrode slurry material is a plurality of negative electrode particles for storing or releasing lithium ions, the negative electrode particles are a plurality of negative electrode particles which are an active substance, and PEO which is thermoplastic and molten at high temperatures, the PEO is solid at room temperature, the PEO has ion conducting ability and can be used to conduct lithium ions and improves the overall lithium ion conducting ability of the negative electrode, and CMC which the CMC and the PEO are polymer materials, when the negative electrode slurry material is heated to a specific temperature, the copolymer of the PEO and the CMC in the negative electrode slurry material becomes molten, the entire negative electrode slurry material becomes viscous and adheres to the negative electrode substrate and the entire CMC forms the negative electrode plate, and the slurry material The negative electrode slurry material comprises a plurality of conductive agents for increasing the electronic conductivity of the material, a lithium salt used to slide molecular chains within the polymer material and enhance ion conductivity, and a plurality of ceramic particles used to guide lithium ions and having high ion conductivity for lithium ions, wherein the plurality of negative electrode particles, the plurality of ceramic particles, the conductive agents, and the lithium salt are dispersed between the polymer material for supporting the entire negative electrode slurry material, the negative electrode slurry material exhibits a solid material structure at room temperature, and when heated to a specific temperature, the PEO in the negative electrode slurry material melts to form a molten state, so that the PEO can adhere to the negative electrode substrate, the negative electrode plate is formed, and the electrostatic spray gun connected to the raw material tank receives the negative electrode slurry material from the raw material tank,An electrostatic spray gun that applies a voltage to the negative electrode slurry material, generates static electricity on the surface of the particles of the negative electrode slurry material in the electrostatic spray gun to form charged fine particles, and ejects the charged fine particles from the output port of the electrostatic spray gun; and a roller belt structure located at the output port of the electrostatic spray gun, wherein the roller belt structure is used to transport a carrier plate, the carrier plate is used to receive the charged fine particles ejected from the output port so as to form a first electrode plate, and each of the fine particles is very fine so as to eject the charged fine particles from the electrostatic spray gun The system comprises a roller belt structure in which, when ejected onto the carrier plate, the negative electrode slurry material is attracted to each other by the action of static electricity, exhibiting a high bulk density, thereby forming a negative electrode plate with a high energy density, further increasing the lithium conduction energy, and when the charged fine particles come into contact with the metal plate, an electrostatic attraction force is generated between the charged fine particles and the metal plate, causing the charged fine particles to be attracted to the metal plate and form the first electrode plate; and a heater connected to the roller belt structure, used to heat the first electrode plate so as to form a molten material on the charged fine particles, and to adhere it to the negative electrode substrate to form the negative electrode plate. Since the negative electrode plate, on which the negative electrode slurry layer is formed by the negative electrode slurry material, does not need to go through the baking and compaction steps, the material in the negative electrode slurry material is not damaged by the effects of the baking and compaction stress.

[0008] The following information will become clear from the description in the specification and drawings described later. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic diagram showing a manufacturing apparatus for a negative electrode plate using a slurry material with an electrostatic spray gun according to one embodiment of the present invention. [Figure 2] This is an application example showing a manufacturing apparatus for a negative electrode plate using a slurry material with an electrostatic spray gun according to one embodiment of the present invention. [Figure 3] This is a schematic cross-sectional view showing ceramic particles and a composite layer according to one embodiment of the present invention. [Figure 4] This is a flowchart showing a manufacturing apparatus for a negative electrode plate using a slurry material with an electrostatic spray gun according to one embodiment of the present invention. [Modes for carrying out the invention]

[0010] The embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the embodiments described below, and can take various forms as long as they fall within the technical scope of the present invention.

[0011] First, an example of a specific embodiment of the apparatus for manufacturing negative electrode plates using slurry material with the electrostatic spray gun of the present invention will be described with reference to Figures 1 to 4.

[0012] The apparatus for manufacturing a negative electrode plate using a slurry material with an electrostatic spray gun according to the present invention comprises a negative electrode substrate 21 and a negative electrode slurry layer 22 adhered to the negative electrode substrate 21. In typical solid or semi-solid batteries, a liquid negative electrode slurry containing a solvent is applied to the negative electrode substrate 21, followed by baking and compaction steps to form the negative electrode plate 20. This method requires the simultaneous completion of manufacturing the negative electrode slurry and the negative electrode substrate 21, and the wet negative electrode slurry has a short shelf life. Furthermore, the baking and compaction steps may crush the material in the negative electrode slurry, potentially affecting the performance of the battery. Therefore, in the present invention, the negative electrode slurry is composed of a negative electrode slurry material 100. The negative electrode slurry material 100 is solid at room temperature, and such a slurry-like negative electrode slurry can be manufactured independently and does not necessarily need to be bonded to the negative electrode substrate 21 beforehand. Therefore, the negative electrode substrate 21 and the negative electrode slurry material 100 can be manufactured separately. This makes it easier to obtain the negative electrode slurry material 100 and provides greater flexibility in the manufacturing of the negative electrode plate 20. Since the negative electrode slurry material 100 is a solvent-free solid, it has a long shelf life and can be stored at room temperature. Furthermore, the negative electrode plate 20 on which the negative electrode slurry layer 22 is formed by the negative electrode slurry material 100 does not require the baking and compaction steps, and therefore the material in the negative electrode slurry material 100 is not damaged by the stress of baking and compaction.

[0013] The structure of the negative electrode plate to which the negative electrode slurry material 100 is bonded by electrostatic adsorption mainly comprises the following components.

[0014] <Raw material tank 10> It is used to contain the negative electrode slurry material 100. The negative electrode slurry material 100 is in powder form, and the size of its powder particles is in the range of 0.01 nm to 10 mm.

[0015] Each of the aforementioned negative electrode slurry materials 100 mainly comprises the following components. The configuration of each component will be described below.

[0016] The plurality of negative electrode particles 15 are used to store or release lithium ions, and the negative electrode particles 15 are an active material. The plurality of negative electrode particles 12 are a carbon material (at least one of graphite, hard carbon, and soft carbon is selected from this carbon material), a silicon-carbon composite material (Si-C), and a silicon-oxygen-carbon composite material (SiOx-C).

[0017] PEO (Poly(ethylene oxide)) 14 has thermoplasticity and exhibits a molten state at high temperatures. Since the PEO 14 has ion conduction ability, it can be used to guide lithium ions.

[0018] CMC (carboxymethyl cellulose) 17. The CMC 17 and the PEO 14 are polymer materials.

[0019] The plurality of conductive agents 13 are used to increase the electron conductivity of the negative electrode slurry material 100. The plurality of conductive agents 13 are at least one of carbon nanotubes, nano-sized amorphous carbon, and graphene. The nano-sized amorphous carbon is, for example, superP.

[0020] The lithium salt 19 is used to slide the molecular chains in the polymer material and enhance the ion conduction ability. The lithium salt 19 is either poly(diallyl dimethyl ammonium)-bis(trifluoromethanesulfonyl)imide (PDDA-TFSI) or N-methyl-N-butylpyrrolidinium bis(trifluoromethylsulfonyl)imide (Py14-TFSI).

[0021] The plurality of ceramic particles 160 are used to guide lithium ions, and the plurality of ceramic particles 160 have a high ionic conductivity with respect to lithium ions. When lithium ions pass through the negative electrode 20, the guiding by the plurality of dispersed ceramic particles 160 forms a dispersion path of lithium ions, preventing abnormal accumulation of lithium ions in the negative electrode slurry 100 and avoiding side reactions with the negative electrode slurry 100. The plurality of ceramic particles 160 are lithium aluminium germanium phosphate (LAGP), lithium aluminum titanium phosphate (LATP), lithium lanthanum zirconium oxide (Li7La3Zr2O 12 , lithium lanthanum zirconium oxide, LLZO), lithium lanthanum titanium oxide (LLTO), or LPSC (LPSCl, sulfide solid electrolyte).

[0022] The plurality of negative electrode particles 15, the plurality of ceramic particles 160, the conductive agent 13, and the lithium salt 19 are dispersed among the polymer materials for supporting the entire negative electrode slurry material 100.

[0023] The weight ratio of the plurality of negative electrode particles 15, "the polymer material and the lithium salt 19", and "the conductive agent 13 and the plurality of ceramic particles 160" is in the range of 90 to 95:8 to 4:2 to 1. That is, the ratio of the plurality of negative electrode particles 15, "the polymer material and the lithium salt 19", and "the conductive agent 13 and the plurality of ceramic particles 160" is A:B:C. A is in the range of 90 to 95, B is in the range of 8 to 4, and C is in the range of 2 to 1. As long as A, B, and C are ratios within these ranges, all are acceptable in the present invention. In this specification, numerical values with the same usage all have the same definition.

[0024] The negative electrode slurry material 100 exhibits a solid material structure at room temperature. When heated to 50°C to 240°C, the PEO 14 in the negative electrode slurry material 100 melts, forming a molten state. This allows the PEO 14 to adhere to the negative electrode substrate 21, thereby forming the negative electrode plate 20.

[0025] The electrostatic spray gun 30 is connected to the raw material tank 10 and is used to receive the negative electrode slurry material 100 from the raw material tank 10, apply a voltage to the negative electrode slurry material 100, generate static electricity on the surface of the particles of the negative electrode slurry material 100 in the electrostatic spray gun 30, form charged fine particles 150, and eject the charged fine particles 150 from the output port 34 of the electrostatic spray gun 30.

[0026] The electrostatic spray gun 30 has a voltage structure 32 capable of applying a voltage to the negative electrode slurry material 100. The voltage is in the range of 0.1 to 100 kV.

[0027] The roller belt structure 60 is located at the output port 34 of the electrostatic spray gun 30, and the roller belt structure 60 is used to transport the carrier plate 65, which is used to receive the charged fine particles 150 ejected from the output port 34. The charged fine particles 150 are ejected from the output port 34 onto the negative electrode substrate 21, forming the first electrode plate 500.

[0028] Because the particles of each of the negative electrode slurry materials 100 are very fine (the size of the powder particles of each of the negative electrode slurry materials 100 is in the range of 0.01 nm to 10 mm), when the negative electrode slurry material 100 is sprayed from the electrostatic spray gun 30 onto the carrier plate 65, the negative electrode slurry material 100 is attracted to each other by the action of electrostatics, exhibiting a high bulk density, which forms a negative electrode plate with a high energy density, and further increases the lithium conduction energy.

[0029] The roller belt structure 60 includes a roller set 62 containing a plurality of rollers. A conveyor belt 64 is wound around the roller set 62, and the plurality of rollers in the roller set 62 are driveable to move along the conveyor belt 64.

[0030] The carrier plate 65 is a metal plate, preferably a copper plate. The metal plate is unwound from a metal roll 70. The metal roll is connected to the roller belt structure 60. During operation, the metal plate unwound by the metal roll 70 is laid flat on the conveyor belt 64 and moves together with the conveyor belt 64. The metal plate serves as the negative electrode substrate 21. When the multiple rollers in the roller set 62 rotate, the conveyor belt 64 is moved in conjunction, and the negative electrode substrate 21 located on the conveyor belt 64 is moved by the conveyor belt 64 to the output ports 34 of the electrostatic spray gun 30.

[0031] When the charged fine particles 150 come into contact with the metal plate, an electrostatic attraction force is generated between the charged fine particles 150 and the metal plate, causing the charged fine particles 150 to be attracted to the metal plate and forming the first electrode plate 500.

[0032] The heater 40 is connected to the roller belt structure 60 and is used to heat the first electrode plate 500 so that a molten material 200 is formed on the charged fine particles 150, and to bond it to the negative electrode substrate 21 to form the negative electrode plate 20.

[0033] The negative electrode slurry material 100 exhibits a solid material structure at room temperature. When heated to a temperature between 50°C and 240°C, the PEO 14 in the negative electrode slurry material 100 melts, forming a molten state. This allows the PEO 14 to adhere to the negative electrode substrate 21, thereby forming the negative electrode plate 20.

[0034] The heater 40 comprises two pressure rollers 42 arranged in parallel and side-by-side, with a accommodating space 46 formed between the two pressure rollers 42 for holding the first electrode plate 500, and two heating structures 44 are respectively located within the two pressure rollers 42. When the two heating structures 44 are used to heat the two pressure rollers 42, the charged fine particles 150 held in the accommodating space 46 are heated, the charged fine particles 150 form the molten material 200, which is bonded to the metal plate to form the negative electrode plate 20.

[0035] The following describes a manufacturing method in which the negative electrode slurry material 100 is bonded to the negative electrode substrate 21 by the electrostatic spray gun structure described above, thereby forming the negative electrode plate 20. In the following description, the definitions of the components indicated by the same reference numerals are the same as those defined in the structure described above, and therefore, that explanation will not be repeated.

[0036] The steps of the manufacturing method of the embodiment of the present invention will be described in detail below with reference to Figure 4. <Step A>: The negative electrode slurry material 100 in the raw material tank 10 is input to the electrostatic spray gun 30, and a voltage is applied to the negative electrode slurry material 100 by the electrostatic spray gun 30, causing static electricity to be generated on the surface of the particles of the negative electrode slurry material 100, thereby forming charged fine particles 150. <Step B>: The charged fine particles 150 are output from the output port 34 of the electrostatic spray gun 30 to the carrier plate 65 (i.e., the metal plate) of the roller belt structure 60, forming the first electrode plate 500. Because the particles of the negative electrode slurry material 100 are very fine, when the negative electrode slurry material 100 is sprayed from the electrostatic spray gun 30 onto the carrier plate 65, the negative electrode slurry material 100 is attracted to each other by the action of static electricity, exhibiting a high bulk density, thereby forming a negative electrode plate with a high energy density, and further increasing the lithium conduction energy. <Step C>: The roller belt structure 60 moves the first electrode plate 500 to the heater 40 locations. <Step D>: The first electrode plate 500 is placed in the heater 40 and heated, so that the charged fine particles 150 form the molten material 200, which is then bonded to the negative electrode substrate 21. <Step E>: The molten material 200 is cooled naturally, and due to the temperature difference, it changes into a solid and adheres to the negative electrode substrate 21, thereby obtaining the negative electrode plate 20. At room temperature, a solid negative electrode slurry layer 22 is formed by the negative electrode slurry material 100.

[0037] By the manufacturing method described above, a negative electrode plate 20 is manufactured to which the negative electrode slurry material 100 is bonded, thereby forming a negative electrode slurry layer 22. The negative electrode plate 20 comprises the negative electrode slurry layer 22 and a negative electrode substrate 21 to which the negative electrode slurry layer 22 is coated. The negative electrode slurry layer 22 is mainly formed of the negative electrode slurry material 100. The negative electrode slurry material 100 includes a plurality of negative electrode particles 15, PEO 14, CMC 17, a plurality of conductive agents 13, a lithium salt 19, and a plurality of ceramic particles 160. The plurality of negative electrode particles 15, the plurality of ceramic particles 160, the conductive agents 13, and the lithium salt 19 are dispersed between the polymer material for supporting the entire negative electrode slurry material 100.

[0038] In this case, as shown in Figure 3, the outer surface of each ceramic particle 160 is further coated with a composite layer 115, and the whole forms a composite ceramic particle 300. The composite layer 115 comprises a hydroxyl ion layer 110 that covers the outer surface of the ceramic particle 160, and a dopamine layer 130 that covers the outer surface of the hydroxyl ion layer 110. The hydroxyl ion layer 110 is formed by adding tris(hydroxymethyl)amine in the manufacturing method for producing the composite ceramic particle 300, and the tris(hydroxymethyl)amine has three OH groups. - The bond is formed between the two OH groups in the tris(hydroxymethyl)amine. -The bonding occurs to the oxidative functional groups on the surface of the ceramic particles 160 themselves. The third OH of the tris(hydroxymethyl)amine - The hydroxyl ion layer 110 is formed by the extension of the bond toward the outer surface of the ceramic particles 160. The dopamine layer 130 can be formed by a copolymerization reaction between the dopamine molecules. The OH of the dopamine itself - The bond is the third OH of the hydroxyl ion layer 110 - A dehydration polymerization reaction occurs with the bonds, allowing dopamine to bind to the hydroxyl ion layer 110, and the whole forms the composite ceramic particles 300. Since the dopamine is hydrophobic, it can further protect the ceramic particles 160 from getting wet. The particle size of the ceramic particles 160 is in the range of 50 nm to 200 nm. The thickness of the hydroxyl ion layer 110 is in the range of 0.5 nm to 2 nm. The thickness of the dopamine layer 130 is in the range of 1 nm to 10 nm.

[0039] The dopamine layer 120 is composed of multiple polydopamine molecules. Since dopamine is hydrophobic, it can prevent the ceramic particles 160 from undergoing side reactions with external solvents. Partial fluoride ions in the PVDF material are ionically bonded with lithium ions on the surface of the corresponding ceramic particles 160 to form lithium fluoride. Other partial fluoride ions in the PVDF material are hydrogen-bonded with nitrogen ions of the polydopamine molecules in the dopamine layer 120, thereby forming the PVDF layer 130 that covers the outer surface of the dopamine layer 120 by the PVDF material.

[0040] The advantage of this invention is that the powder particles of the negative electrode slurry material are extremely fine. When the negative electrode slurry material is sprayed from the electrostatic spray gun onto the carrier plate, the particles are attracted to each other by the action of static electricity, resulting in a high bulk density. This forms a negative electrode plate with a high energy density, further increasing the lithium conduction energy. Furthermore, in this invention, the negative electrode slurry material and the negative electrode substrate are manufactured completely separately. This eliminates the limitation that the negative electrode plate must be manufactured simultaneously, as in conventional methods. This makes it easier to obtain the slurry material, allows for storage at room temperature, and provides greater flexibility in the manufacturing of the negative electrode plate. In addition, since general negative electrode slurries contain solvents, after the general negative electrode slurry is applied to the negative electrode substrate, a baking and rolling process is required to form a negative electrode slurry layer that adheres to the negative electrode substrate. This method is costly. The slurry material is bonded to the negative electrode substrate by utilizing the property that the PEO exhibits a molten state at high temperatures. Therefore, there is no need to add a solvent to bond it to the negative electrode substrate, thus eliminating the need for baking and rolling processes and reducing manufacturing costs. Furthermore, the negative electrode slurry layer applied in this manner has an average thickness, high bulk density, and further forms a high-density energy electrode plate.

[0041] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means devised for each of the different embodiments are also included within the technical scope of the present invention. [Explanation of Symbols]

[0042] 10 Raw material tanks 13 Conductive agent 14 PEO 15 Negative electrode particles 17 CMC 19 Lithium salts 20 Negative electrode plates 21 Negative electrode substrate 22. Negative electrode slurry layer 30 Electrostatic spray guns 32 Voltage Structure 34 output ports 40 Heater 42 Pressure rollers 44 Heating structure 46 Containment space 60 Roller belt structure 62 Roller Set 64 Conveyor Belts 65 Carrier Plate 70 Metal Rolls 100 Negative electrode slurry material 110 Hydroxyl ion layer 115 Composite layer 130 Dopamine layer 150 fine particles 160 ceramic particles 200 molten material 300 Composite ceramic particles 500 First plate

Claims

1. An apparatus for manufacturing a negative electrode plate using a slurry material with an electrostatic spray gun, wherein the negative electrode plate comprises a negative electrode substrate and a negative electrode slurry layer bonded to the negative electrode substrate, the negative electrode slurry layer is composed of the negative electrode slurry material, the negative electrode slurry material is solid at room temperature, and by independently manufacturing such a slurry-like negative electrode slurry, the negative electrode substrate and the negative electrode slurry material can be manufactured separately, and because the negative electrode slurry material is a solvent-free solid, it has a long shelf life and can be stored at room temperature. The aforementioned manufacturing apparatus, A raw material tank for containing the aforementioned negative electrode slurry material, The aforementioned negative electrode slurry material is A plurality of negative electrode particles for storing or releasing lithium ions, wherein the negative electrode particles consist of a plurality of negative electrode particles that are an active material, A thermoplastic PEO that is molten at high temperatures, becomes solid at room temperature, and has ion-conducting ability, making it usable for conducting lithium ions, and a PEO that improves the overall lithium ion conductivity, CMC, wherein the CMC and the PEO are polymer materials, and when the negative electrode slurry material is heated to a specific temperature, the copolymer of the PEO and the CMC in the negative electrode slurry material becomes molten, the entire negative electrode slurry material becomes viscous, adheres to the negative electrode substrate, and the entire CMC forms the negative electrode plate. A plurality of conductive agents for increasing the electronic conductivity of the slurry material, wherein the plurality of conductive agents are selected from at least one of carbon nanotubes, nano-sized amorphous carbon, and graphene, A lithium salt used to slide molecular chains within the aforementioned polymer material and enhance ion conductivity, It includes multiple ceramic particles that are used to guide lithium ions and have high ionic conductivity for lithium ions, The plurality of negative electrode particles, the plurality of ceramic particles, the conductive agent, and the lithium salt are dispersed among the polymer material for supporting the slurry material. The negative electrode slurry material exhibits a solid material structure at room temperature, and when heated to a specific temperature, the PEO in the negative electrode slurry material melts, forming a molten state, which allows the PEO to adhere to the negative electrode substrate, and the negative electrode plate is formed in the raw material tank, An electrostatic spray gun connected to the raw material tank, which receives the negative electrode slurry material in the raw material tank, applies a voltage to the negative electrode slurry material, generates static electricity on the surface of the particles of the negative electrode slurry material in the electrostatic spray gun to form charged fine particles, and ejects the charged fine particles from the output port of the electrostatic spray gun, A roller belt structure located at the output port of the electrostatic spray gun, wherein the roller belt structure is used to transport a carrier plate, the carrier plate is used to receive the charged fine particles ejected from the output port so as to form a first electrode plate, and the carrier plate is a metal plate. Because each of the charged fine particles is extremely fine, when the charged fine particles are ejected from the electrostatic spray gun onto the carrier plate, the charged fine particles are attracted to each other by the action of static electricity, resulting in a high bulk density, which in turn forms a negative electrode plate with a high energy density, further increasing the lithium conduction energy. When the charged fine particles come into contact with the metal plate, an electrostatic attraction force is generated between the charged fine particles and the metal plate, causing the charged fine particles to be attracted to the metal plate and form the first electrode plate. The roller belt structure is connected to a heater used to heat the first electrode plate so as to form a molten material on the charged fine particles and to bond it to the negative electrode substrate to form the negative electrode plate, An apparatus for manufacturing a negative electrode plate using a slurry material with an electrostatic spray gun, characterized in that the negative electrode plate on which the negative electrode slurry layer is formed by the negative electrode slurry material does not need to undergo baking and compaction steps, and therefore the material in the negative electrode slurry material is not damaged by the stress of baking and compaction.

2. The apparatus for manufacturing a negative electrode plate using a slurry material with an electrostatic spray gun according to claim 1, characterized in that the negative electrode slurry material is in powder form and the size of the powder particles is in the range of 0.01 nm to 10 mm.

3. The apparatus for manufacturing a negative electrode plate using a slurry material with an electrostatic spray gun according to claim 1, characterized in that the plurality of negative electrode particles are selected from one of a carbon material, a silicon-carbon composite material, and a silicon-oxygen-carbon composite material, and the carbon material is selected from at least one of graphite, hard carbon, and soft carbon.

4. The apparatus for manufacturing a negative electrode plate using a slurry material with an electrostatic spray gun according to claim 1, characterized in that the lithium salt is selected from either PDDA-TFSI or Py14-TFSI.

5. The apparatus for manufacturing a negative electrode plate using a slurry material with an electrostatic spray gun according to claim 1, characterized in that the plurality of ceramic particles are selected from germanium aluminum lithium phosphate, titanium aluminum lithium phosphate, lithium lanthanum zirconium oxide, lithium lanthanum titanium oxide, and LPSC.

6. The apparatus for manufacturing a negative electrode plate using a slurry material with an electrostatic spray gun according to claim 1, characterized in that the specific temperature is in the range of 50°C to 240°C, and this temperature range is capable of melting the PEO.

7. The apparatus for manufacturing a negative electrode plate using a slurry material with an electrostatic spray gun according to claim 1, characterized in that the roller belt structure comprises a roller set including a plurality of rollers, a conveyor belt is wound around the roller set, and the plurality of rollers in the roller set are driveable to move the conveyor belt.

8. The apparatus for manufacturing a negative electrode plate using a slurry material with an electrostatic spray gun according to claim 7, characterized in that the carrier plate is a metal plate, the metal plate is unwound by a metal roll, the metal roll and the roller belt structure are connected, and during operation, the metal plate unwound by the metal roll is laid flat on the conveyor belt and moves together with the conveyor belt, and the metal plate serves as the negative electrode substrate.

9. The heater comprises two pressure rollers arranged in parallel and side-by-side, a accommodating space for holding the first electrode plate is formed between the two pressure rollers, two heating structures are respectively located within the two pressure rollers, the two heating structures are used to heat the two pressure rollers, thereby heating the charged fine particles held in the accommodating space, forming the molten material with the charged fine particles and adhering it to the metal plate, thereby forming the negative electrode plate, as described in claim 1, an apparatus for manufacturing a negative electrode plate using a slurry material with an electrostatic spray gun.

10. The apparatus for manufacturing a negative electrode plate using a slurry material with an electrostatic spray gun, wherein the outer surface of each of the ceramic particles is further coated with a composite layer, forming a composite ceramic particle overall, and the composite layer includes a hydroxyl ion layer that covers the outer surface of the ceramic particle and a dopamine layer that covers the outer surface of the hydroxyl ion layer, as described in claim 1.

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