Laser drying device

Abstract

The present disclosure aims to provide a laser drying apparatus that can uniformly dry an electrode composite layer and suppress the leakage of hot air to the outside. [Solution] A laser drying apparatus 100 for drying an electrode composite layer, the laser drying apparatus 100 comprises a laser light source 110, a furnace body 120, a transport path 130, a hot air supply unit 140, and a pressure adjustment chamber 150, wherein the laser light source 110 irradiates the electrode composite layer inside the furnace body 120 with laser light 200 to heat and dry it, the hot air supply unit 140 supplies hot air to the furnace body 120, the electrode composite layer is transported through the furnace body 120 by the transport path 130, the hot air supply unit 140 supplies hot air to the furnace body 120, and the pressure adjustment chamber 150 is located at the inlet and / or outlet of the furnace body 120, and the internal pressure of the pressure adjustment chamber 150 is lower than the internal pressure of the furnace body 120 and the outside air pressure. Laser drying device.

Description

[Technical Field]

[0001] This disclosure relates to a laser drying apparatus. [Background technology]

[0002] Laser drying is a known method for drying electrode composite layers coated on current collector layers. Compared to hot air drying, laser drying has the advantage of lower energy consumption and a lower environmental impact. Various proposals have been made to improve the drying efficiency of laser drying.

[0003] Patent Document 1 discloses an electrode manufacturing method comprising: a transport step of transporting an electrode body coated with at least one electrode material by a transport unit; and a drying step of drying the electrode material while transporting the electrode body by the transport unit, wherein the drying step includes an irradiation step of drying the electrode material by irradiating it with a laser when the electrode body is transported to at least one first position in the transport direction of the transport unit; and a recovery step of recovering the vapor generated as a result of the laser irradiation of the electrode material by a vapor recovery unit provided at at least one second position adjacent to the first position in the transport direction. Patent Document 1 states that, according to the disclosure in Patent Document 1, it is possible to suppress a decrease in drying efficiency when drying the electrode material with a laser.

[0004] Patent Document 2 discloses a method for manufacturing an electrode sheet, comprising: a coating step of applying an active material paste to the surface of a long metal sheet while conveying the metal sheet; and a drying step performed in parallel with the coating step, in which the active material paste on the metal sheet is dried while the metal sheet with the active material paste applied is conveyed in a drying oven, wherein hot air is blown in the direction of conveying the metal sheet, and light is irradiated onto the active material paste on the metal sheet from at least one light source, and the temperature of the active material paste becomes higher than the temperature inside the drying oven as a result of the light irradiation. Patent Document 2 states that, according to the disclosure in Patent Document 2, the temperature of the active material paste can be easily controlled and the active material paste can be dried uniformly in a short time. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2023-169591 [Patent Document 2] Japanese Patent Publication No. 2024-039889 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] As described in Patent Document 2, supplying hot air into the furnace improves drying efficiency. On the other hand, from a safety standpoint, it is preferable for the furnace to be under negative pressure to prevent the hot air supplied into the furnace from leaking to the outside. However, creating negative pressure inside the furnace draws in outside air, which can cause temperature unevenness inside the furnace and prevent the electrode mixture layer from drying uniformly.

[0007] Therefore, the present disclosure aims to provide a laser drying apparatus that can uniformly dry the electrode composite layer and suppress the leakage of hot air to the outside. [Means for solving the problem]

[0008] The present disclosure achieves the above object by the following means. <Aspect 1> A laser drying device for drying an electrode composite layer, The laser drying device includes a laser light source, a furnace body, a conveyance path, a hot air supply unit, and a pressure adjustment chamber. The laser light source is configured to irradiate the electrode composite layer in the furnace body with laser light to heat and dry it. The electrode composite layer is configured to be conveyed through the furnace body by the conveyance path. The hot air supply unit supplies hot air into the furnace body, and (i) The pressure adjustment chamber is disposed at the carry-in port of the furnace body, whereby the electrode composite layer is carried into the furnace body through the pressure adjustment chamber and the carry-in port by the conveyance path, and carried out through the carry-out port; and / or (ii) The pressure adjustment chamber is disposed at the carry-out port of the furnace body, whereby the electrode composite layer is carried into the furnace body through the carry-in port by the conveyance path, and carried out through the carry-out port and the pressure adjustment chamber. The internal pressure of the pressure adjustment chamber is lower than the internal pressure of the furnace body and the external atmospheric pressure. Laser drying device. <Aspect 2> The device according to Aspect 1, wherein the difference between the internal pressure of the furnace body and the internal pressure of the pressure adjustment chamber is 1 Pa or more. <Aspect 3> The device according to Aspect 1 or 2, wherein the difference between the external atmospheric pressure and the internal pressure of the pressure adjustment chamber is 1 Pa or more. <Aspect 4> A method for manufacturing an electrode laminate using the device according to any one of Aspects 1 to 3, irradiating the electrode composite layer coated on the current collector layer with laser light, and supplying hot air into the furnace body, The method for laminating an electrode laminate, including the above steps.

Advantages of the Invention

[0009] According to this disclosure, it is possible to provide a laser drying apparatus that can uniformly dry the electrode composite layer and suppress the leakage of hot air to the outside. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a schematic diagram illustrating the laser drying apparatus of this disclosure. [Figure 2] Figure 2 is a schematic diagram illustrating the laser drying apparatus of this disclosure. [Figure 3] Figure 3 is a schematic diagram illustrating the laser drying apparatus of this disclosure. [Modes for carrying out the invention]

[0011] Laser drying equipment A laser drying apparatus for drying an electrode composite layer, The above laser drying apparatus comprises a laser light source, a furnace body, a transport path, a hot air supply unit, and a pressure adjustment chamber. The above-mentioned laser light source is configured to heat and dry the electrode composite layer inside the furnace body by irradiating it with laser light. The electrode composite layer described above is transported through the furnace body via the transport path described above. The above-mentioned hot air supply unit supplies hot air into the above-mentioned furnace body, and (i) The pressure adjustment chamber is located at the entrance to the furnace body, so that the electrode mixture layer is transported into the furnace body through the pressure adjustment chamber and the entrance via the transport path, and / or is transported out through the exit, and / or (ii) The pressure adjustment chamber is located at the outlet of the furnace body, so that the electrode mixture layer is transported into the furnace body through the transport path and the inlet, and then transported out through the outlet and the pressure adjustment chamber. The internal pressure of the above-mentioned pressure adjustment chamber is lower than the internal pressure of the above-mentioned furnace body and the external atmospheric pressure. Laser drying device.

[0012] According to this disclosure, it is possible to provide a laser drying apparatus that can uniformly dry the electrode composite layer and suppress the leakage of hot air to the outside.

[0013] The Disclosing Parties have found that by placing a pressure adjustment chamber when laser drying an electrode composite layer, leakage of hot air to the outside can be suppressed. Because the pressure inside the pressure adjustment chamber is lower than the pressure inside the furnace, the hot air supplied to the furnace flows towards the pressure adjustment chamber. Also, because the pressure inside the pressure adjustment chamber is lower than the ambient air pressure, it draws in outside air. Therefore, the hot air supplied to the furnace flows into the pressure adjustment chamber and does not leak to the outside. Furthermore, because the flow of hot air inside the furnace is rectified by the pressure adjustment chamber, the hot air is supplied uniformly to the electrode composite layer, and the electrode composite layer can be dried uniformly. In addition, since the entry of outside air into the furnace can be suppressed, the temperature inside the furnace can be kept constant.

[0014] Specifically, as shown in Figure 1, the laser drying apparatus 100 includes a laser light source 110, a furnace body 120, a transport path 130, a hot air supply unit 140, and a pressure adjustment chamber 150. The transport path 130 has a transport belt 131 and transport rollers 132, and the transport rollers 132 rotate to move the electrode mixture layer placed on the transport belt 131 at a constant speed in the transport direction. Therefore, it is possible to transport the electrode mixture layer from outside the furnace body 120 into the furnace body 120 and to transport the electrode mixture layer from inside the furnace body 120 to outside the furnace body 120. The electrode mixture layer transported into the furnace body 120 by the transport path 130 is irradiated with laser light 200 from the laser light source 110.

[0015] Furthermore, the hot air supply unit 140 consists of a hot air generator 141, an air supply duct 142, and an air supply nozzle 143. The hot air supply unit 140 supplies the hot air generated by the hot air generator 141 into the furnace body 120 via the air supply duct 142 and the air supply nozzle 143. The hot air is supplied in a direction opposite to the conveying direction.

[0016] The inlet of the furnace body 120 is connected to the furnace body connection part 151 of the pressure adjustment chamber 150. Since the internal pressure of the pressure adjustment chamber 150 is made lower than the internal pressure of the furnace body 120 by the pressure adjustment part 153, the hot air supplied into the furnace body 120 flows into the pressure adjustment chamber 150 through the inlet and the furnace body connection part 151. Also, the pressure in the pressure adjustment chamber 150 is lower than the external atmospheric pressure, and outside air flows into the pressure adjustment chamber 150 through the outside air suction part 152. Then, the hot air and outside air in the furnace body 120 sucked by the pressure adjustment chamber 150 are exhausted to a predetermined position through the exhaust part 154.

[0017] Hereinafter, embodiments of the present disclosure will be described in detail. Note that the present disclosure is not limited to the following embodiments, and various modifications can be made within the scope of the gist of the present disclosure.

[0018] The laser drying device of the present disclosure is a laser drying device for drying an electrode composite material layer.

[0019] Regarding the present disclosure, "electrode composite material" means a composition that can form an electrode active material layer as it is or by further containing other components. And "electrode composite material layer" means a layer that contains a dispersion medium in addition to the "electrode composite material" and can form an electrode active material layer by coating and drying it.

[0020] The laser drying device of the present disclosure includes a laser light source, a furnace body, a conveyance path, a hot air supply part, and a pressure adjustment chamber.

[0021] The energy density of the laser light irradiated from the laser light source onto the electrode composite material layer in the drying furnace is not particularly limited. For example, for example, 0.1 W / cm 2 or more, 0.5 W / cm 2 or more, 1.0 W / cm 2 or more, 2.0 W / cm 2 or more, or 3.0 W / cm 2 or more may be used, and 20.0 W / cm 2 or less, 10.0 W / cm 2 or less, 7.0 W / cm 2 or less, or 4.0 W / cm 2The following is also acceptable.

[0022] The distance between the laser light source and the electrode composite layer irradiated with laser light is not particularly limited and may be determined appropriately considering the irradiation area of ​​the laser light. The above distance may be, for example, 300 mm or more, 500 mm or more, 1000 mm or more, 1500 mm or more, 2000 mm or more, or 5000 mm or less, 4000 mm or less, or 3000 mm or less.

[0023] <Laser light source> The laser light source is designed to dry the electrode composite layer inside the furnace by irradiating it with laser light and heating it. The laser light source may be located inside the furnace or outside the furnace.

[0024] The type of laser light source is not particularly limited and may be, for example, a Yb fiber laser, a YAG laser, a carbon dioxide laser, etc. The wavelength of the laser light may be 0.5 μm or more, 0.6 μm or more, 0.7 μm or more, 0.8 μm or more, or 0.9 μm or more, and may be 1.5 μm or less, 1.4 μm or less, 1.3 μm or less, 1.2 μm or less, or 1.1 μm or less. The laser light may be a single wavelength or multiple wavelengths.

[0025] The output power of the laser light source is not particularly limited and may be appropriately determined based on the laser light irradiation area, the available irradiation time, etc. The output power of the laser light source may be, for example, 0.1 kW or more, 1 kW or more, 5 kW or more, 10 kW or more, 15 kW or more, 20 kW or more, or 30 kW or more, and may be 100 kW or less, 70 kW or less, or 50 kW or less.

[0026] The number of laser light sources is not particularly limited and may be determined as appropriate based on the laser light irradiation area, the available irradiation time, etc. The number of laser light sources may be, for example, one or more, two or more, three or more, five or more, or ten or more, or it may be 30 or less, or 20 or less.

[0027] The shape of the irradiation area of ​​the electrode composite layer with the laser light may be, for example, rectangular. Furthermore, the size of the irradiation area is not particularly limited and may be appropriately determined by the dimensions of the electrode composite layer.

[0028] <Furnace body> Inside the furnace, the electrode mixture layer is dried by irradiation with laser light. The furnace body has an inlet for transporting the electrode mixture layer and an outlet for transporting it out via a transport path.

[0029] The material of the furnace body is not particularly limited and may be, for example, steel, stainless steel, aluminum, etc. The exterior substrate may be surface-treated with zinc plating, powder coating, etc. The dimensions of the furnace body are not particularly limited and may be determined as appropriate considering the dimensions of the transport path, electrode composite layer, etc.

[0030] The furnace body may be constructed by connecting multiple furnace bodies together, as shown in Figure 2.

[0031] <Transportation route> The electrode mixture layer can be transported through the furnace body via a transport path. The electrode mixture layer may be placed on the transport path, brought in through the furnace body's inlet, and discharged through the furnace body's outlet.

[0032] The transport path is not particularly limited and may be, for example, a roller conveyor, a belt conveyor, etc. The electrode mixture layer may be placed on the transport path and transported into the furnace body and out of the furnace body.

[0033] The electrode mixture layer may be irradiated with laser light while moving through the furnace body via a transport path. In this case, the moving speed may be appropriately determined considering the output of the laser light source, the amount of energy required to dry the electrode mixture layer, etc. The moving speed may be, for example, 0.1 m / s or more, 0.3 m / s or more, 0.5 m / s or more, or 1.0 m / s or more, or 3.0 m / s or less, 2.5 m / s or less, or 2.0 m / s or less.

[0034] The transport path may be connected to other devices such as an electrode composite layer coating device or an electrode laminate winding device.

[0035] <Hot air supply section> The hot air supply unit supplies hot air into the furnace body. By supplying hot air to the electrode mixture layer, steam on the surface of the electrode mixture layer can be removed, thereby improving drying efficiency.

[0036] The temperature of the hot air supplied from the hot air supply unit may be 100°C or higher, 120°C or higher, 150°C or higher, 200°C or higher, 250°C or higher, or 300°C or higher, and may also be 500°C or lower, 450°C or lower, 400°C or lower, or 350°C or lower.

[0037] The hot air supply unit is not particularly limited and may, for example, supply air heated by gas combustion, oil combustion, electric heating, etc., to the electrode mixture layer via a blower fan through a blower duct and blower nozzle. From the viewpoint of drying the electrode mixture layer, the hot air is preferably low in humidity.

[0038] The direction of hot air supply is not particularly limited and may be opposite to the direction of transport. Furthermore, multiple air nozzles may be arranged, each with a different supply direction.

[0039] The wind speed of the hot air is not particularly limited and may be, for example, 5 m / s or more, 10 m / s or more, 15 m / s or more, or 20 m / s or more. Higher wind speeds result in higher drying efficiency of the electrode mixture layer. Alternatively, the wind speed of the hot air may be 60 m / s or less, 50 m / s or less, 40 m / s or less, or 30 m / s or less.

[0040] <Pressure Regulation Room> The pressure adjustment chamber is located at the furnace body's inlet and / or outlet. If located at the inlet, the electrode mixture layer is transported into the furnace body via a transport path through the pressure adjustment chamber and the inlet, and then transported out through the outlet. If located at the outlet, the electrode mixture layer is transported into the furnace body via a transport path through the inlet, and then transported out through the outlet and the pressure adjustment chamber. Specifically, for example, as shown in Figure 1, the pressure adjustment chamber 150 may be located only at the furnace body's inlet, or as shown in Figure 3, it may be located at both the furnace body's inlet and outlet. The pressure adjustment chamber may also have a furnace body connection section and an outside air intake section.

[0041] The internal pressure of the pressure adjustment chamber is lower than the internal pressure of the furnace body and the ambient air pressure. Because the internal pressure of the pressure adjustment chamber is lower than the internal pressure of the furnace body, air from inside the furnace body is drawn into the pressure adjustment chamber through the furnace body connection. Also, because the internal pressure of the pressure adjustment chamber is lower than the ambient air pressure, outside air is drawn in through the outside air intake, so the air drawn in from inside the furnace body does not leak to the outside through the outside air intake.

[0042] The difference between the internal pressure of the furnace body and the internal pressure of the pressure adjustment chamber is not particularly limited and may be, for example, 1 Pa or more, 2 Pa or more, or 3 Pa or more. A larger difference increases the recovery efficiency of steam generated from the electrode mixture layer and enhances the rectification effect of the hot air supplied to the furnace body, thereby increasing the drying efficiency. The difference may be 10 Pa or less, 8 Pa or less, 6 Pa or less, or 4 Pa ​​or less. The difference in internal pressure can be calculated by measuring the internal pressure of the furnace body and the internal pressure of the pressure adjustment chamber using pressure gauges.

[0043] The difference between the outside air pressure and the internal pressure of the pressure adjustment chamber is not particularly limited and may be, for example, 1 Pa or more, 2 Pa or more, or 3 Pa or more. A larger difference enhances the effect of preventing the air drawn into the furnace by the pressure adjustment chamber from leaking to the outside. The difference may be 10 Pa or less, 8 Pa or less, 6 Pa or less, or 4 Pa ​​or less. The difference in internal pressure can be calculated by measuring the outside air pressure and the internal pressure of the pressure adjustment chamber using pressure gauges.

[0044] The pressure adjustment chamber may have an exhaust vent. The exhaust vent exhausts the air drawn in from the furnace body and the outside air drawn in.

[0045] The pressure regulating chamber may have a pressure regulating unit. The pressure regulating unit adjusts the internal pressure of the pressure regulating chamber. The pressure regulating unit may have, for example, an exhaust fan.

[0046] The material of the pressure adjustment chamber is not particularly limited and may be, for example, steel, stainless steel, aluminum, etc. The exterior substrate may be surface-treated with zinc plating, powder coating, etc. The dimensions of the pressure adjustment chamber are not particularly limited and may be determined as appropriate considering the dimensions of the transport path, electrode composite layer, etc.

[0047] Method for manufacturing electrode stacks A method for manufacturing an electrode laminate using a laser drying apparatus, as disclosed herein, Irradiating the electrode composite layer coated on the current collector layer with laser light, and To supply hot air into the furnace body, A method for laminating electrode stacks, including the method described above.

[0048] According to this disclosure, it is possible to provide a method for manufacturing an electrode laminate in which the electrode composite layer can be dried uniformly and the leakage of laser light to the outside is suppressed.

[0049] The method disclosed herein is a method for manufacturing an electrode laminate using the laser drying apparatus described herein. For details regarding the laser drying apparatus, please refer to the description of the laser drying apparatus above.

[0050] The method of this disclosure includes irradiating an electrode mixture layer coated on a current collector layer with laser light. The electrode mixture layer and the laser light can be described in the above-described laser drying apparatus. By irradiating the electrode mixture layer with laser light, the dispersion medium contained in the electrode mixture layer volatilizes, forming an electrode active material layer.

[0051] The dispersion medium contained in the electrode composite layer is not particularly limited and may include, for example, nonpolar solvents such as heptane, xylene, and toluene, as well as polar solvents such as water, tertiary amine solvents, ether solvents, thiol solvents, ketone solvents (e.g., diisobutyl ketone) and ester solvents (e.g., butyl butyrate).

[0052] The content of the above-mentioned dispersion medium is not particularly limited, and may be such that the solid content of the electrode composite layer is 30% or more, 35% or more, 40% or more, 45% or more, or 50% or more, or it may be such that it is 80% or less, 75% or less, 70% or less, 65% or less, or 60% or less.

[0053] The coating method for the electrode composite layer is not particularly limited and may include the doctor blade method, die coating method, gravure coating method, spray coating method, electrostatic coating method, bar coating method, etc.

[0054] The irradiation time of the laser light is not particularly limited, and may be extended, for example, until the reduction drying period of the electrode composite layer is reached. The irradiation time of the laser light may be, for example, 30 seconds or more, 1 minute or more, or 2 minutes or more, and may be 30 minutes or less, 20 minutes or less, or 10 minutes or less.

[0055] The method of this disclosure includes supplying hot air into the furnace body. For details regarding the furnace body and the supply of hot air, refer to the description of the laser drying apparatus above.

[0056] <Electrode Laminate> The electrode stack may have an electrode active material layer and a current collector layer. The electrode active material layer may be a positive electrode active material layer or a negative electrode active material layer. Furthermore, the electrode stack may be a bipolar electrode stack having a positive electrode active material layer and a negative electrode active material layer.

[0057] (electrode active material layer) If the electrode active material layer of this disclosure is a positive electrode active material layer, this positive electrode active material layer contains at least a positive electrode active material. If the electrode active material layer is a negative electrode active material layer, this negative electrode active material layer contains at least a negative electrode active material. The electrode active material layer may further optionally contain a binder, a solid electrolyte, and a conductive additive. The electrode active material layer may also contain various other additives. The respective contents of the positive electrode active material, negative electrode active material, binder, solid electrolyte, conductive additive, etc. in the electrode active material layer should be appropriately determined according to the desired battery performance.

[0058] The material of the positive electrode active material is not particularly limited as long as it is capable of intercalating and releasing lithium ions. Examples of positive electrode active materials include lithium cobalt oxide (LiCoO2), lithium nickel oxide (LiNiO2), lithium manganese oxide (LiMn2O4), and nickel-cobalt-manganese oxide (NCM:LiCO2). 1 / 3 Ni 1 / 3 Mn 1 / 3 O2), lithium nickel-cobalt aluminum oxide (LiNi 0.8 (CoAl) 0.2 O2), Li 1+x Mn 2-x-y M y This may include, but is not limited to, heteroatom-substituted Li-Mn spinel with a composition represented by O4 (where M is one or more metallic elements selected from Al, Mg, Co, Fe, Ni, and Zn).

[0059] The shape of the positive electrode active material is not particularly limited, as long as it is a shape common for positive electrode active materials in batteries. The positive electrode active material may be, for example, particulate. The positive electrode active material may be primary particles or secondary particles formed by the aggregation of multiple primary particles. The average particle diameter D of the positive electrode active material 50 For example, it may be 1 nm or more, 5 nm or more, or 10 nm or more, and it may also be 500 μm or less, 100 μm or less, 50 μm or less, or 30 μm or less. Note that the average particle diameter D 50 This is the particle diameter (median diameter) at 50% of the integrated value in the volume-based particle size distribution determined by laser diffraction and scattering.

[0060] As the negative electrode active material, various materials can be used whose potential for intercalating and releasing lithium ions (charge / discharge potential) is lower than that of the positive electrode active material described above. The material of the negative electrode active material is not particularly limited and may be metallic lithium, or any material capable of intercalating and releasing metallic ions such as lithium ions. Examples of materials capable of intercalating and releasing metallic ions such as lithium ions include alloy-based negative electrode active materials, carbon materials, or lithium titanate (Li4Ti5O4). 12 Examples include, but are not limited to, those listed above.

[0061] The alloy-based anode active material is not particularly limited and includes, for example, Si alloy-based anode active materials or Sn alloy-based anode active materials. Si alloy-based anode active materials include silicon, silicon oxide, silicon carbide, silicon nitride, or solid solutions thereof. Si alloy-based anode active materials may also contain metallic elements other than silicon, such as Fe, Co, Sb, Bi, Pb, Ni, Cu, Zn, Ge, In, Sn, Ti, etc. Sn alloy-based anode active materials include tin, tin oxide, tin nitride, or solid solutions thereof. Sn alloy-based anode active materials may also contain metallic elements other than tin, such as Fe, Co, Sb, Bi, Pb, Ni, Cu, Zn, Ge, In, Ti, Si, etc.

[0062] The carbon material is not particularly limited and examples include hard carbon, soft carbon, and graphite.

[0063] The shape of the negative electrode active material is not particularly limited, but any shape common for negative electrode active materials in batteries is acceptable. The negative electrode active material may be in the form of parts or sheets, for example.

[0064] The material of the binder is not particularly limited. The binder may be, for example, polyvinylidene fluoride (PVdF), butadiene rubber (BR), polytetrafluoroethylene (PTFE), styrene-butadiene rubber (SBR), etc., but is not limited to these. The binder is not particularly limited, and may be used alone or in combination of two or more types.

[0065] The material of the solid electrolyte is not particularly limited and may be, for example, a sulfide solid electrolyte, an oxide solid electrolyte, or a polymer electrolyte.

[0066] Examples of sulfide solid electrolytes include, but are not limited to, sulfide-based amorphous solid electrolytes, sulfide-based crystalline solid electrolytes, or argyrodite-type solid electrolytes. Specific examples of sulfide solid electrolytes include the Li2S-P2S5 system (Li7P3S 11 , Li3PS4, Li8P2S9, etc.), Li2S-SiS2, LiI-Li2S-SiS2, LiI-Li2S-P2S5, LiI-LiBr-Li2S-P2S5, Li2S-P2S5-GeS2 (Li 13 GeP3S 16 Li 10 GeP2S 12 ), LiI-Li2S-P2O5, LiI-Li3PO4-P2S5, Li 7-x PS 6-x Cl x Etc.; or combinations thereof, but not limited to these.

[0067] An example of an oxide solid electrolyte is Li7La3Zr2O 12 Li 7-x La3Zr 1-x Nb x O 12 Li 7-3x La3Zr2Al x O 12 Li 3x La 2 / 3-x TiO3, Li 1+x Al x Ti 2-x (PO4)3, Li 1+x Alx Ge 2-x (PO4)3, Li3PO4, or Li 3+x PO 4-x N x Examples include (LiPON), etc.; or combinations thereof, but are not limited to these.

[0068] The sulfide solid electrolyte and oxide solid electrolyte may be glass or crystallized glass (glass ceramics).

[0069] Examples of polymer electrolytes include, but are not limited to, polyethylene oxide (PEO), polypropylene oxide (PPO), and copolymers thereof.

[0070] The conductive additive is not particularly limited. Examples of conductive additives include, but are not limited to, vapor-grown carbon fibers (VGCF), acetylene black (AB), Ketjenblack (KB), carbon nanotubes (CNT), and carbon nanofibers (CNF). The conductive additive may be particulate or fibrous, and its size is not particularly limited. While the conductive additive is not particularly limited, it may be used alone or in combination of two or more types.

[0071] (Current collector layer) The material of the current collector layer is not particularly limited, but a material commonly used as a conductor for battery electrodes can be appropriately adopted. Examples of materials for the conductive layer include, but are not limited to, Cu, Ni, Cr, Au, Pt, Ag, Al, Fe, Ti, Zn, Co, stainless steel, etc. Furthermore, the current collector layer may be a metal foil or a substrate on which the above metals are plated or deposited.

[0072] The shape of the current collector layer is not particularly limited, but examples include foil-like, plate-like, or mesh-like shapes. Among these, a foil-like shape is preferred.

[0073] The thickness of the current collector layer is not particularly limited, but may be 0.1 μm or more, or 1 μm or more, or 1 mm or less, or 100 μm or less. [Explanation of Symbols]

[0074] 100 Laser drying apparatus 110 Laser light source 120 Furnace body 130 Conveyor paths 131 Conveyor belt 132 Conveyor rollers 140 Hot air supply section 141 Hot air generator 142 Air intake duct 143 Air intake nozzle 150 Pressure Regulating Chamber 151 Furnace body connection section 152 Outside air intake section 153 Pressure adjustment section 154 Exhaust section 200 laser beams

Claims

1. A laser drying apparatus for drying an electrode composite layer, The laser drying apparatus comprises a laser light source, a furnace body, a transport path, a hot air supply unit, and a pressure adjustment chamber. The laser light source is configured to heat and dry the electrode composite layer inside the furnace body by irradiating it with laser light. The electrode composite layer can be transported through the furnace body via the transport path. The aforementioned hot air supply unit supplies hot air into the furnace body, and (i) The pressure adjustment chamber is located at the entrance of the furnace body, so that the electrode composite layer is transported into the furnace body through the pressure adjustment chamber and the entrance via the transport path, and / or is transported out through the exit (ii) The pressure adjustment chamber is located at the outlet of the furnace body, so that the electrode composite layer is transported into the furnace body through the inlet via the transport path, and then transported out through the outlet and the pressure adjustment chamber. The internal pressure of the pressure adjustment chamber is lower than the internal pressure of the furnace body and the ambient air pressure. Laser drying device.

2. The apparatus according to claim 1, wherein the difference between the internal pressure of the furnace body and the internal pressure of the pressure adjustment chamber is 1 Pa or more.

3. The apparatus according to claim 1 or 2, wherein the difference between the external air pressure and the internal pressure of the pressure adjustment chamber is 1 Pa or more.

4. A method for manufacturing an electrode laminate using the apparatus described in claim 1 or 2, Irradiating the electrode composite layer coated on the current collector layer with laser light, and To supply hot air into the furnace body, A method for laminating electrode stacks, including the method described above.

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