Laser drying device

Abstract

The purpose of this disclosure is to provide a laser drying apparatus with high drying efficiency that can suppress the cooling of the electrode composite layer by the outside air. [Solution] A laser drying apparatus 100 for drying an electrode mixture layer 300, wherein the electrode mixture layer 300 comprises a laser light source 110, a furnace body 120, a transport path 130, and a rectifier plate 140, the laser light source 110 heats and dries the electrode mixture layer 300 inside the furnace body 120 by irradiating it with a laser, the electrode mixture layer 300 is transported through the furnace body 120 by the transport path 130, the inside of the furnace body 120 is maintained under negative pressure relative to the outside air, and the rectifier plate 140 is positioned to keep outside air flowing in from the inlet 121 or outlet 122 of the furnace body 120 away from the electrode mixture layer 300.

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 consumes less energy and has a lower environmental impact. Various proposals have been made to improve the quality and 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 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 inside a furnace, wherein hot air is blown inside the furnace along the conveying direction of 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 furnace as a result of the light irradiation. Patent Document 3 discloses that, according to the disclosure in Patent Document 3, the temperature of the active material paste can be appropriately controlled and the drying of the active material paste can be performed 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. 2024-39889 [Overview of the project] [Problems that the invention aims to solve]

[0006] When continuously laser-drying an electrode mixture layer while conveying it by roll-to-roll, the furnace body needs to have openings such as an inlet and outlet. On the other hand, to prevent high-temperature gas from leaking out of the furnace body, the furnace body is kept under negative pressure relative to the outside air. Therefore, outside air may flow into the furnace body through these openings, which can unintentionally cool the electrode mixture layer and reduce drying efficiency.

[0007] Therefore, the present disclosure aims to provide a laser drying apparatus with high drying efficiency that can suppress the cooling of the electrode composite layer by the outside air. [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 electrode composite layer has a laser light source, a furnace body, a conveyance path, and a rectifying plate, The laser light source is configured to irradiate and heat the electrode composite layer in the furnace body with laser light for drying, The electrode composite layer is conveyed through the furnace body by the conveyance path, The inside of the furnace body is maintained at a negative pressure with respect to the outside air, and The rectifying plate is arranged so as to keep the outside air flowing in from the inlet or outlet of the furnace body away from the electrode composite layer. Laser drying device. <Aspect 2> The laser drying device according to Aspect 1, wherein the rectifying plate is arranged at the inlet and / or outlet of the furnace body such that the angle formed by the surface of the rectifying plate and the surface of the conveyance path is 10° or more and 60° or less. <Aspect 3> The laser drying device according to Aspect 1 or 2, wherein the shortest distance between the rectifying plate and the conveyance path is 5 cm or less. <Aspect 4> The laser drying device according to any one of Aspects 1 to 3, wherein the absorption rate of the laser light by the rectifying plate is 80% or more with respect to the laser light from the laser light source. <Aspect 5> A method for manufacturing an electrode laminate using the device according to any one of Aspects 1 to 4, irradiating the electrode composite layer coated on the current collector layer with laser light, A method for manufacturing an electrode laminate, including this.

Advantages of the Invention

[0009] According to the present disclosure, it is possible to provide a laser drying device with high drying efficiency that can suppress cooling of the electrode composite layer by outside air.

Brief Description of the Drawings

[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. [Modes for carrying out the invention]

[0011] Laser drying equipment A laser drying apparatus for drying an electrode composite layer, The above electrode composite layer comprises a laser light source, a furnace body, a transport path, and a rectifier plate. The above-mentioned laser light source is configured to heat and dry the electrode composite layer inside the furnace body by irradiating it with the laser. The electrode composite layer described above is transported through the furnace body via the transport path described above. The inside of the furnace is maintained under negative pressure relative to the outside air, and The above-mentioned rectifier plate is positioned to keep outside air flowing in from the furnace body's inlet or outlet away from the electrode mixture layer. Laser drying device.

[0012] According to this disclosure, it is possible to provide a laser drying apparatus with high drying efficiency that can suppress the cooling of the electrode composite layer by the outside air.

[0013] The Disclosing Parties have found that by positioning the rectifier plate to keep outside air flowing in from the furnace inlet or outlet away from the electrode mixture layer, unintended cooling of the electrode mixture layer by the outside air flowing into the furnace can be suppressed. The incoming low-temperature outside air is guided by the rectifier plate to a position away from the electrode mixture layer, without directly contacting it. Therefore, the electrode mixture layer can maintain a high temperature, and drying efficiency can be improved.

[0014] Specifically, for example, as shown in Figure 1, the laser drying apparatus 100 includes a laser light source 110, a furnace body 120, a transport path 130, and a rectifier plate 140.

[0015] As the conveyor roller 131 rotates, the electrode mixture layer 300 and the current collector layer 400, which are placed on the conveyor path 130, can be conveyed at a constant speed in the conveying direction. Therefore, it is possible to bring the electrode mixture layer 300 and the current collector layer 400 into the furnace body 120 from outside the furnace body 120 through the inlet 121, and to discharge the electrode mixture layer 300 and the current collector layer 400 from inside the furnace body 120 to outside the furnace body 120 through the outlet 122.

[0016] The electrode mixture layer 300, which has been transported into the furnace body 120 via the transport path 130, is irradiated with laser light 200 from the laser light source 110. This removes volatile components contained in the electrode mixture layer 300 and dries the electrode mixture layer.

[0017] A baffle plate 140 is positioned near the entrance 121. The baffle plate 140 is positioned to keep outside air flowing into the furnace body 120 from the electrode mixture layer 300.

[0018] The laser drying apparatus 100 also includes a hot air supply device 150 and an exhaust device 160. The hot air generated by the hot air generator 151 is supplied to the electrode mixture layer 300 inside the furnace body 120 via the air supply duct 152 and air supply nozzle 153. By supplying hot air to the electrode mixture layer 300, vapors on the surface of the electrode mixture layer 300 are removed, increasing the drying efficiency. The volatile components removed from the electrode mixture layer 300 by the laser light 200 and hot air are discharged to the outside of the furnace body 120 by the exhaust device 160.

[0019] The embodiments of this disclosure will be described in detail below. However, this disclosure is not limited to the embodiments described below and can be implemented in various ways within the scope of the gist of this disclosure.

[0020] The laser drying apparatus of this disclosure is a laser drying apparatus for drying an electrode composite layer.

[0021] Regarding the present disclosure, the "electrode composite material" means a composition that can form an electrode active material layer as it is or by further containing other components. And the "electrode composite material layer" means a layer that contains a dispersion medium in addition to the "electrode composite material", and thereby can be applied and dried to form an electrode active material layer. Note that the electrode composite material layer is applied and dried on at least a part of the current collector layer.

[0022] The laser drying device of the present disclosure has a laser light source, a furnace body, a conveyance path, and a rectifying plate. Further, the laser drying device may further include a hot air supply device and an exhaust device.

[0023] 〈Laser Light Source〉 The laser light source is configured to irradiate the electrode composite material layer in the furnace body with laser light for heating and drying.

[0024] The energy density of the laser light irradiated from the laser light source to the electrode composite material layer in the furnace body 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 it may be 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 2 or less.

[0025] The distance between the laser light source and the electrode composite material layer irradiated with the laser light is not particularly limited and may be appropriately determined in consideration of 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, and may also be 5000 mm or less, 4000 mm or less, or 3000 mm or less. The laser light source may be disposed inside the furnace body or outside the furnace body.

[0026] The type of laser light source is not particularly limited and may include, 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] <Furnace body> Drying the electrode mixture layer inside the furnace body can improve drying efficiency.

[0031] The inside of the reactor is maintained under negative pressure relative to the outside air. This negative pressure prevents heat from leaking out of the reactor to the outside.

[0032] The difference between the external air pressure and the internal pressure of the furnace body is not particularly limited and may be, for example, 1 Pa or more, 2 Pa or more, or 3 Pa or more, or 10 Pa or less, 8 Pa or less, 6 Pa or less, or 4 Pa ​​or less. The above difference can be calculated by measuring the external air pressure and the internal pressure of the furnace body with pressure gauges.

[0033] The furnace body has an inlet for loading the electrode mixture layer via a transport path, and an outlet for unloading the electrode mixture layer. The dimensions of the inlet and outlet are not particularly limited, but are preferably small from the viewpoint of preventing leakage of hot air. The above dimensions may be, for example, the minimum dimensions that can transport the electrode mixture layer.

[0034] The base material of the furnace body is not particularly limited and may be, for example, steel, stainless steel, aluminum, etc. The furnace body may be surface-treated by 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 electrode composite layer, etc.

[0035] From the viewpoint of improving the drying efficiency of the electrode mixture layer, the furnace body preferably has high thermal insulation properties, and may have thermal insulation material on the outside of the base material. Examples of thermal insulation materials include firebrick, ceramic fiber, and glass wool.

[0036] <Transportation route> The electrode mixture layer is transported through the furnace body by a transport path. The type of transport path is not particularly limited and may be, for example, a roller conveyor, a belt conveyor, etc.

[0037] The electrode mixture layer may be irradiated with laser light while being transported inside the furnace body via a transport path. In this case, the transport 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 transport 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.

[0038] The transport path may be connected to other devices such as an electrode composite layer coating device or an electrode laminate winding device.

[0039] <Rectifier plate> The rectifier plate is positioned to keep outside air flowing in from the inlet or outlet of the furnace body away from the electrode mixture layer.

[0040] Specifically, for example, as shown in Figure 2, by arranging the rectifier plate 140, the outside air flowing into the furnace body flows as indicated by arrow 500, thus being kept away from the electrode mixture layer.

[0041] The rectifier plate may be positioned above the transport path 130 in the height direction, or below it in the height direction, as shown in Figure 2.

[0042] The baffle plates may be positioned at the furnace inlet and / or outlet so that the angle between the surface of the baffle plate and the surface of the transport path is between 10° and 60°. The angle between the surface of the baffle plate and the surface of the transport path refers to angle α in Figure 2. By satisfying the above angle, incoming outside air can be kept away from the electrode mixture layer. The above angle may be between 15° and 20° and 25° and 30° and may be between 55° and 50° and 45° and 40° and 40°.

[0043] The shortest distance between the rectifier plate and the transport path may be 5.0 cm or less. "The shortest distance between the rectifier plate and the transport path" refers to distance d in Figure 2. A shorter shortest distance reduces the amount of incoming outside air that comes into contact with the electrode mixture layer. The shortest distance may be 4.0 cm or less, 3.0 cm or less, or 2.0 cm or less, or it may be 0.5 cm or more, or 1.0 cm or more.

[0044] The transmittance of the laser light through the rectifier plate may be 80% or more relative to the laser light from the laser light source. This high transmittance does not obstruct laser irradiation to the electrode composite layer. The transmittance may be 85% or more, 90% or more, 95% or more, or 98% or more, and may be 100% or less, or 99% or less.

[0045] The absorption rate of the laser light of the rectifier plate may be 80% or more of the laser light from the laser light source. A high absorption rate suppresses the leakage of laser light irradiated into the furnace to the outside. The absorption rate may be 85% or more, 90% or more, 95% or more, or 98% or more, and may be 100% or less, or 99% or less.

[0046] The transmittance and absorptance of laser light are, if the laser light has a single wavelength, the transmittance at that wavelength, and if the laser light has multiple wavelengths, the transmittance at the wavelength with the highest intensity. The transmittance and absorptance of laser light can be measured by spectrophotometry using an ultraviolet-visible-near-infrared spectrophotometer (Shimadzu Corporation, SolidSpec-3700DUV).

[0047] The material of the baffle plate is not particularly limited, but it is preferably a material that can withstand the temperature inside the furnace. The material of the baffle plate may be, for example, glass, acrylic (PMMA), polycarbonate (PC), or polyetheretherketone (PEEK). The glass may be, for example, quartz glass, soda-lime glass, lead glass, borosilicate glass, or alkali glass. In addition, the absorption rate of laser light may be increased by coating the above materials with carbon black or the like.

[0048] The dimensions of the baffle plate are not particularly limited and may be determined as appropriate, taking into consideration the dimensions of the furnace body, the dimensions of the inlet and outlet, the amount of outside air flowing in, etc.

[0049] <Hot air supply equipment> By supplying hot air to the electrode mixture layer using a hot air supply device, vapor can be removed from the surface of the electrode mixture layer, thereby improving drying efficiency.

[0050] The temperature of the hot air supplied from the hot air supply equipment may be 100°C or higher, 120°C or higher, or 140°C or higher, 160°C or higher, 180°C or higher, or 200°C or higher. Higher hot air temperatures increase drying efficiency. Alternatively, the temperature of the hot air may be 400°C or lower, 350°C or lower, 300°C or lower, or 250°C or lower.

[0051] The hot air supply equipment 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.

[0052] The direction of hot air supply is not particularly limited; for example, if the electrode mixture layer is transported inside the furnace body, the direction may be opposite to the transport direction. Furthermore, multiple air nozzles may be arranged, each with a different supply direction.

[0053] 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.

[0054] <Exhaust equipment> The laser drying apparatus may have an exhaust system. Having an exhaust system allows for the recovery of vapors generated from the electrode mixture layer, thereby increasing drying efficiency. The vapors may be water vapor or other gases.

[0055] The exhaust equipment may be configured, for example, by using an exhaust fan to draw steam in from the exhaust port and discharge it to the outside of the furnace body via an exhaust duct. The output of the exhaust fan, the dimensions of the exhaust port and exhaust duct may be determined appropriately considering the amount of steam generated, etc.

[0056] The exhaust port is preferably positioned to directly take in outside air that has been separated from the electrode mixture layer by the rectifier plate. The number of exhaust ports is not particularly limited.

[0057] 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, A method for manufacturing an electrode stack, including [the specified element].

[0058] According to this disclosure, it is possible to provide a method for manufacturing an electrode laminate with high drying efficiency that can suppress the cooling of the electrode composite layer by the outside air.

[0059] 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.

[0060] 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.

[0061] 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).

[0062] 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.

[0063] 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.

[0064] 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.

[0065] <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.

[0066] (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.

[0067] 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), lithium iron phosphate (LFP:LiFePO4), lithium iron manganese phosphate (LMFP:LiFeMnPO4), and lithium nickel-cobalt-manganate (NCM:LiCO2O2). 1 / 3 Ni 1 / 3 Mn 1 / 3 O2), lithium nickel-cobalt aluminum oxide (LiNi0.8 (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).

[0068] 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.

[0069] 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.

[0070] 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.

[0071] The carbon material is not particularly limited and examples include hard carbon, soft carbon, and graphite.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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 etc.), LiI-Li2S-P2O5, LiI-Li3PO4-P2S5, Li 7-x PS 6-x Cl x Etc.; or combinations thereof, but not limited to these.

[0076] 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 Al x 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.

[0077] The sulfide solid electrolyte and oxide solid electrolyte may be glass or crystallized glass (glass ceramics).

[0078] Examples of polymer electrolytes include, but are not limited to, polyethylene oxide (PEO), polypropylene oxide (PPO), and copolymers thereof.

[0079] 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.

[0080] (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.

[0081] 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.

[0082] 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]

[0083] 100 Laser drying apparatus 110 Laser light source 120 Furnace body 130 Conveyor paths 131 Conveyor roller 140 Rectifier plate 150 Hot air supply equipment 151 Hot air generator 152 Air supply duct 153 Air intake nozzle 160 Exhaust equipment 200 laser beams 300 Electrode composite layer 400 Current collector layer

Claims

1. A laser drying apparatus for drying an electrode composite layer, The electrode composite layer comprises a laser light source, a furnace body, a transport path, and a rectifier plate. The laser light source is configured to heat and dry the electrode composite layer inside the furnace body by irradiating it with the laser. The electrode composite layer is transported through the furnace body by the transport path. The inside of the furnace is maintained under negative pressure relative to the outside air, and The rectifier plate is positioned to keep outside air flowing in from the inlet or outlet of the furnace body away from the electrode mixture layer. Laser drying device.

2. The laser drying apparatus according to claim 1, wherein the rectifier plate is arranged at the inlet and / or outlet of the furnace body such that the angle between the surface of the rectifier plate and the surface of the transport path is 10° or more and 60° or less.

3. The laser drying apparatus according to claim 1 or 2, wherein the shortest distance between the rectifier plate and the transport path is 5 cm or less.

4. The laser drying apparatus according to claim 1 or 2, wherein the absorption rate of the laser light of the rectifier plate is 80% or more with respect to the laser light from the laser light source.

5. 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, A method for manufacturing an electrode stack, including [the specified element].

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