Coating device, coating method, manufacturing method of cathode and manufacturing method of solid battery

Abstract

To provide a coating device and a coating method which can suppress discharged slurry from dragging at an end edge thereof when intermittently discharging the slurry from a die head.SOLUTION: A coating device comprises: a transportation roller which continuously transports a sheet-like material M to be painted; a first die head 12 which intermittently discharges a first slurry L1 toward a first surface area S1 of the material M to be painted that is continuously transported to discontinuously form a first coating part; and a first air nozzle 13 which ejects a first gas A1 toward an end edge of the first slurry L1 intermittently discharged. The first die head 12 discharges the first slurry L1 in a direction approximately orthogonal to a transportation direction D1 of the material M to be painted in a first surface area S1. The first air nozzle 13 ejects the first gas A1 in a direction approximately parallel with the transportation direction D1 of the material M to be painted in the first surface area S1.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a coating device, a coating method, a method for manufacturing a positive electrode, and a method for manufacturing a solid-state battery. [Background technology]

[0002] In recent years, research and development into batteries that contribute to energy efficiency has been conducted to ensure that many people have access to affordable, reliable, sustainable and advanced energy.

[0003] The battery includes a positive electrode having a positive electrode current collector and a positive electrode composite layer, a negative electrode having a negative electrode current collector and a negative electrode composite layer, and an electrolyte, and a coating device is used when manufacturing the battery.

[0004] Patent Document 1 describes a coating device that applies a slurry to the surface of a continuously moving sheet-like member. The coating device includes a die head with a slit-shaped discharge port facing a backup roll that supports the sheet-like member. The coating device also includes a first gas nozzle that is disposed on the side of the sheet-like member immediately after the discharge port and that is oriented to supply pressurized gas in a direction along the width direction toward the widthwise edge of the slurry layer applied to the sheet-like member. The coating device also includes a second gas nozzle that is disposed downstream of the first gas nozzle and on the backup roll toward the widthwise edge of the slurry layer and that is oriented to supply pressurized gas in a direction perpendicular to the surface of the slurry layer. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2017-170312 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the coating device described in Patent Document 1, when the slurry is intermittently discharged from the die head, drag occurs at the trailing end of the discharged slurry.

[0007] An object of the present invention is to provide a coating device and a coating method that can suppress drag at the end of the discharged slurry even when the slurry is discharged intermittently from a die head. [Means for solving the problem]

[0008] (1) A coating apparatus comprising: a conveying section for continuously conveying a sheet-shaped material to be coated; a first die head for intermittently ejecting a first slurry toward a first surface region of the continuously conveyed material to form a first coated portion; and a first gas ejection section for ejecting a first gas toward the end of the intermittently ejected first slurry, wherein the first die head ejects the first slurry in a direction substantially perpendicular to the conveying direction of the material to be coated in the first surface region and has a slit-shaped first ejection port extending in the width direction of the conveying section; and the first gas ejection section ejects the first gas toward the end of the intermittently ejected first slurry in a direction substantially perpendicular to the conveying direction of the material to be coated in the first surface region. a first gas ejection section configured to eject the first gas in directions substantially parallel to the first die head and the second body section, the first gas ejection section having a slit-shaped first ejection port extending in the width direction of the conveying section, and a first body section and a second body section extending in the width direction of the conveying section, the first ejection port being formed between the first body section and the second body section, the first gas ejection section being disposed such that the first ejection port is near the first discharge port and the first body section and the second body section are on the first die head and conveying section sides, respectively, and the first body section extends closer to the first die head than the second body section.

[0009] (2) The coating device described in (1), wherein the first gas ejection section further includes a plurality of first supply ports through which the first gas is supplied, and a first gas junction section connected to the plurality of first supply ports and the first ejection port and through which the first gases supplied from the plurality of first supply ports join, and the plurality of first supply ports are arranged in the width direction of the conveying section.

[0010] (3) The coating device described in (2), wherein the first supply port and the first gas junction have dimensions in the thickness direction that are larger than the first jet outlet, and the first gas junction has an inclined surface that is inclined toward the first jet outlet.

[0011] (4) A coating device according to (2) or (3), wherein the first main body portion has a groove-shaped portion extending in the width direction of the conveying portion, the second main body portion is a plate-shaped member, and the first gas junction portion is formed between the first main body portion and the second main body portion.

[0012] (5) A coating device according to any one of (1) to (4), further comprising a second die head that intermittently ejects a second slurry toward a second surface region of the continuously transported workpiece to form a second coated portion intermittently, the second surface region being downstream of the first surface region and forming the second coated portion in an area where the first coated portion is not formed, the second die head ejecting the second slurry in a direction approximately perpendicular to the transport direction of the workpiece in the second surface region and having a slit-shaped second ejection opening extending in the width direction of the transport portion.

[0013] (6) The coating device according to (5), further comprising a second gas ejection section that ejects a second gas toward a terminal end of the intermittently ejected second slurry, the second gas ejection section ejecting the second gas in a direction substantially parallel to the conveying direction of the workpiece in the second surface region, the second gas ejection section having a slit-shaped second ejection port extending in the width direction of the conveying section, and third and fourth body sections extending in the width direction of the conveying section, the second ejection port being formed between the third and fourth body sections, the second gas ejection section being positioned such that the second ejection port is near the second ejection port and the third and fourth body sections are on the side of the second die head and the conveying section, respectively, and the third body section extends closer to the second die head than the fourth body section.

[0014] (7) A coating method using a coating device described in any one of (1) to (4), comprising a step of intermittently forming a first coated portion by intermittently ejecting the first slurry from the first die head toward a first surface region of the continuously transported sheet-shaped substrate while continuously transporting the substrate.

[0015] (8) A coating method using the coating device described in (5) or (6), comprising the steps of: while continuously conveying the sheet-shaped substrate, intermittently ejecting the first slurry from the first die head toward a first surface area of ​​the continuously conveyed substrate to intermittently form first coated sections; and intermittently ejecting the second slurry from the second die head toward a second surface area of ​​the continuously conveyed substrate to intermittently form second coated sections.

[0016] (9) A method for producing a positive electrode by the coating method according to (8), wherein the substrate is a positive electrode current collector, the first slurry is a slurry for a positive electrode composite layer, and the second slurry is a slurry for an insulating layer.

[0017] (10) A method for producing a solid-state battery, comprising the step of obtaining a positive electrode by the method for producing a positive electrode according to (9). [Effects of the Invention]

[0018] According to the present invention, it is possible to provide a coating device and a coating method that can suppress dragging at the trailing end of the discharged slurry even when the slurry is discharged intermittently from the die head. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a perspective view showing a coating device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view showing the coating device of FIG. [Figure 3] FIG. 2 is a top view illustrating a first coating unit. [Figure 4]FIG. 10 is a top view showing the drag at the end of the first slurry. [Figure 5] FIG. 3 is an enlarged perspective view of the first air nozzle of FIG. 2. [Figure 6] FIG. 3 is an enlarged cross-sectional view of the first air nozzle of FIG. 2. [Figure 7] FIG. 2 is a cross-sectional view showing the coating device of FIG. [Figure 8] FIG. 2 is a top view illustrating a second coating section. [Figure 9] FIG. 3 is an enlarged cross-sectional view of the second air nozzle of FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0021] [Coating equipment] As shown in Figures 1 and 2, the coating device 10 includes a transport roller 11 as a transport unit that continuously transports a sheet-like material M to be coated, and a first die head 12 that intermittently discharges a first slurry L1 toward a first surface region S1 of the continuously transported material M to intermittently form a first coated portion C1 (see Figure 3). The coating device 10 also includes a first air nozzle 13 as a first gas ejection unit that ejects a first gas A1 toward the end of the intermittently ejected first slurry L1. This reduces drag at the end of the first slurry L1 ejected from the first die head 12, thereby improving the shape accuracy of the first coated portion C1. The first die head 12 ejects the first slurry L1 in a direction approximately perpendicular to the transport direction D1 of the material M in the first surface region S1. The first air nozzle 13 also ejects the first gas A1 in a direction substantially parallel to the transport direction D1 of the workpiece M in the first surface region S1.

[0022] In order to spray the first gas A1 toward the end of the first slurry L1 that is intermittently sprayed, the timing of spraying the first gas A1 can be adjusted based on the coating speed of the first slurry L1 (the transport speed of the workpiece M), the flow rate of the first gas A1, and the timing of stopping the spraying of the first slurry L1.

[0023] At this time, the coating speed of the first slurry L1 (the conveying speed of the workpiece M) is not particularly limited, but is, for example, 10 m / min to 60 m / min. The ejection pressure of the first gas A1 is not particularly limited, but is, for example, 10 kPa to 700 kPa. Furthermore, the viscosity of the first slurry L1 at 25°C is not particularly limited, but is, for example, 1000 mPa·s to 3000 mPa·s.

[0024] If the first gas A1 is not ejected toward the end of the first slurry L1 that is intermittently discharged, drag will occur at the end of the first slurry L1 discharged from the first die head 12 (see FIG. 4).

[0025] The first die head 12 ejects the first slurry L1 and has a slit-shaped first outlet 12a extending in the width direction W of the conveying roller 11 (material to be coated M). The first air nozzle 13 ejects the first gas A1 and has a slit-shaped first outlet 13a extending in the width direction W of the conveying roller 11 (see FIG. 5). This further improves the shape accuracy of the first coating section C1. In this case, the first outlet 13a is disposed near the first outlet 12a. The width of the first outlet 13a is not particularly limited, but is, for example, 500 mm or more and 700 mm or less.

[0026] As shown in FIG. 6, the first air nozzle 13 has a first body portion 61 and a second body portion 62 extending in the width direction W of the conveying roller 11, and the first ejection port 13a is formed between the first body portion 61 and the second body portion 62. The first body portion 61 and the second body portion 62 are positioned so as to face the first die head 12 and the conveying roller 11 (the material M), respectively, and the first body portion 61 extends closer to the first die head 12 than the second body portion 62 (see FIG. 2). This allows the first air nozzle 13 to be positioned closer to the first ejection port 12a of the first die head 12, thereby efficiently ejecting the first gas A1. Furthermore, because the first body portion 61 extends closer to the first die head 12 than the second body portion 62, the first gas A1 is guided toward the end of the intermittently ejected first slurry L1, and the first air nozzle 13 does not interfere with the conveying roller 11.

[0027] The first air nozzle 13 further has a plurality of first supply ports 63 through which the first gas A1 is supplied from a supply source (for example, a tank) of the first gas A1, and a first gas junction 64 that is connected to the plurality of first supply ports 63 and the first ejection port 13a and where the first gas A1 supplied from the plurality of first supply ports 63 join together. In this case, the plurality of first supply ports 63 are formed in the width direction W of the conveying roller 11 (depth direction in the drawing).

[0028] The first supply port 63 and the first gas junction 64 have dimensions in the thickness direction larger than those of the first ejection port 13a, and the first gas junction 64 has an inclined surface I1 that slopes toward the first ejection port 13a. That is, the first main body 61 has a groove-shaped portion G1 that extends in the width direction W of the conveying roller 11, the second main body 62 is a plate-shaped member, and the first gas junction 64 is formed between the first main body 61 and the second main body 62. In this case, the inclination angle of the inclined surface I1 is not particularly limited, but is, for example, 10° to 80°.

[0029] The first die head 12 is not particularly limited as long as it is capable of intermittently discharging the first slurry L1 to intermittently form the first coated portions C1, and any known die head can be used.

[0030] As shown in Figure 7, the coating device 10 further includes a second die head 14 that intermittently discharges a second slurry L2 toward a second surface region S2 of the continuously transported workpiece M to intermittently form second coated sections C2 (see Figure 8). The second surface region S2 is located downstream of the first surface region S1, and the second coated sections C2 are formed in regions where the first coated sections C1 are not formed. This results in high shape accuracy for the first coated sections C1, and therefore high shape accuracy for the second coated sections C2. The second die head 14 discharges the second slurry L2 in a direction substantially perpendicular to the transport direction D2 of the workpiece M in the second surface region S2.

[0031] The coating device 10 also includes a second air nozzle 15 as a second gas ejection section that ejects a second gas A2 toward the terminal end of the intermittently ejected second slurry L2. This suppresses drag at the terminal end of the second slurry L2 ejected from the second die head 14, thereby improving the shape accuracy of the second coated section C2. The second air nozzle 15 ejects the second gas A2 in a direction substantially parallel to the transport direction D2 of the workpiece M in the second surface region S2.

[0032] In order to spray the second gas A2 toward the end of the intermittently ejected second slurry L2, the timing of spraying the second gas A2 can be adjusted based on the coating speed of the second slurry L2 (the transport speed of the workpiece M), the flow rate of the second gas A2, and the timing of stopping the ejection of the second slurry L2.

[0033] At this time, the coating speed of the second slurry L2 (the conveying speed of the workpiece M) is not particularly limited, but is, for example, 10 m / min to 60 m / min. The ejection pressure of the second gas A2 is not particularly limited, but is, for example, 10 kPa to 700 kPa. Furthermore, the viscosity of the second slurry L2 at 25°C is not particularly limited, but is, for example, 1000 mPa·s to 3000 mPa·s.

[0034] Similar to the first die head 12, the second die head 14 ejects the second slurry L2 and has a slit-shaped second outlet 14a extending in the width direction W of the conveying roller 11. Similarly to the first air nozzle 13, the second air nozzle 15 ejects the second gas A2 and has a slit-shaped second outlet 15a extending in the width direction W of the workpiece M. This further improves the shape accuracy of the second coating section C2. In this case, the second outlet 15a is located near the second outlet 14a.

[0035] As shown in FIG. 9 , the second air nozzle 15 has a third body portion 71 and a fourth body portion 72 extending in the width direction W of the conveying roller 11, and the first outlet 15a is formed between the third body portion 71 and the fourth body portion 72. The second body portion 71 and the third body portion 72 are positioned so as to face the second die head 14 and the conveying roller 11 (the material M), respectively, and the third body portion 71 extends closer to the second die head 14 than the fourth body portion 72 (see FIG. 7 ). This allows the second air nozzle 15 to be positioned closer to the first outlet 14a of the first die head 14, thereby efficiently ejecting the second gas A2. Furthermore, because the third body portion 71 extends closer to the second die head 14 than the fourth body portion 72, the second gas A2 is guided toward the end of the intermittently ejected second slurry L2, and the second air nozzle 15 does not interfere with the conveying roller 11.

[0036] The second air nozzle 15 further has a plurality of second supply ports 73 through which the second gas A2 is supplied from a supply source (for example, a tank) of the second gas A2, and a second gas junction 74 that is connected to the plurality of second supply ports 73 and the second ejection port 15a and where the second gas A2 supplied from the plurality of second supply ports 73 join together. In this case, the plurality of first supply ports 73 are formed in the width direction W of the conveying roller 11 (depth direction in the drawing).

[0037] The second supply port 73 and the second gas junction 74 have dimensions in the thickness direction larger than those of the second ejection port 15a, and the second gas junction 74 has an inclined surface I2 that inclines toward the second ejection port 15a. That is, the third main body 71 has a groove-shaped portion G2 that extends in the width direction W of the conveying roller 11, the fourth main body 72 is a plate-shaped member, and the second gas junction 74 is formed between the third main body 71 and the fourth main body 72. In this case, the inclination angle of the inclined surface I2 is not particularly limited, but is, for example, 10° to 80°.

[0038] The second die head 14 is not particularly limited as long as it is capable of intermittently discharging the second slurry L2 to intermittently form the second coated portions C2, and any known die head can be used.

[0039] If necessary, the second air nozzle 15 may be omitted, and the second die head 14 may also be omitted.

[0040] [Coating method] The coating method of this embodiment includes a step of intermittently forming first coated portions C1 by intermittently ejecting a first slurry L1 from a first die head 12 toward a first surface region S1 of the continuously conveyed sheet-like material M while continuously conveying the material M. This step can be performed using a coating device 10. At this time, a first gas A1 is ejected toward the end of the intermittently ejected first slurry L1. This suppresses drag at the end of the first slurry L1 ejected from the first die head 12, thereby improving the shape accuracy of the first coated portions C1. Furthermore, the first slurry L1 is ejected in a direction substantially perpendicular to the conveyance direction D1 of the material M in the first surface region S1, and the first gas A1 is ejected in a direction substantially parallel to the conveyance direction D1 of the material M in the first surface region S1.

[0041] The coating method of this embodiment may further include a step of intermittently ejecting second slurry L2 from the second die head 14 toward a second surface region S2 of the continuously transported workpiece M to intermittently form second coated sections C2. In this step, the second surface region S2 is located downstream of the first surface region S1, and the second coated sections C2 are formed in areas where the first coated sections C1 are not formed. This increases the shape accuracy of the first coated sections C1, thereby also increasing the shape accuracy of the second coated sections C2. Here, the second slurry L2 is ejected in a direction approximately perpendicular to the transport direction D2 of the workpiece M in the second surface region S2.

[0042] In the coating method of this embodiment, the second gas A2 may be sprayed toward the terminal end of the intermittently discharged second slurry L2. In this case, the second gas A2 is sprayed in a direction approximately parallel to the transport direction D2 of the workpiece M in the second surface region S2. This suppresses dragging at the terminal end of the second slurry L2 discharged from the second die head 14, resulting in improved shape accuracy of the second coated portion C2. Here, the second gas A2 is sprayed in a direction approximately parallel to the transport direction D2 of the workpiece M in the second surface region S2.

[0043] The coating method of this embodiment may further include a step of heating and drying the workpiece M on which the first coated portion C1 (and the second coated portion C2) have been formed.

[0044] The coating method of this embodiment can be applied to, for example, the production of a positive electrode, a negative electrode, and a solid electrolyte layer that constitute a battery.

[0045] [Cathode manufacturing method] The positive electrode manufacturing method of this embodiment is a method for manufacturing a positive electrode by the coating method of this embodiment. Here, the coating material M is a positive electrode current collector, the first slurry is a slurry for a positive electrode composite layer, and the second slurry is a slurry for an insulating layer. Therefore, a positive electrode with high shape accuracy of the positive electrode composite layer and the insulating layer can be obtained.

[0046] The positive electrode current collector is not particularly limited, but may be, for example, aluminum foil.

[0047] The positive electrode mixture layer slurry contains, for example, a positive electrode active material. The positive electrode active material is not particularly limited, but may be, for example, lithium iron phosphate.

[0048] The insulating layer slurry contains an insulating material, which is not particularly limited, but may be, for example, alumina.

[0049] The method for manufacturing a positive electrode according to the present embodiment may further include a step of continuously forming second insulating layers on both sides of the positive electrode composite layer in the width direction W. In this case, the second insulating layers may also be formed when the positive electrode composite layer is formed.

[0050] [Solid-state battery manufacturing method] The method for manufacturing a solid-state battery of this embodiment includes a step of obtaining a positive electrode by the method for manufacturing a positive electrode of this embodiment, which prevents short circuits in the solid-state battery.

[0051] The method for manufacturing a solid state battery of this embodiment may further include a step of forming a solid electrolyte layer on the positive electrode mixture layer to form a positive electrode-solid electrolyte layer stack.

[0052] The solid-state battery is not particularly limited, but may be, for example, an all-solid-state lithium metal battery, which will be described below.

[0053] The all-solid-state lithium metal battery includes a negative electrode having a negative electrode current collector and a lithium metal layer, a positive electrode having a positive electrode current collector and a positive electrode mixture layer, and a solid electrolyte layer.

[0054] The negative electrode current collector is not particularly limited, but may be, for example, copper foil.

[0055] The positive electrode composite layer includes a positive electrode active material and may further include a solid electrolyte, a conductive additive, a binder, etc. The positive electrode active material is not particularly limited as long as it is capable of absorbing and releasing lithium ions, and examples thereof include lithium nickel cobalt manganese composite oxide. The solid electrolyte is not particularly limited as long as it has lithium ion conductivity, and examples thereof include oxide-based electrolytes and sulfide-based electrolytes. The conductive additive is not particularly limited as long as it has electronic conductivity, and examples thereof include carbon black. The binder is not particularly limited as long as it can improve binding properties, and examples thereof include styrene butadiene rubber.

[0056] The positive electrode current collector is not particularly limited, but may be, for example, aluminum foil.

[0057] The solid electrolyte layer includes a solid electrolyte and may further include a binder, etc. The solid electrolyte is not particularly limited as long as it has lithium ion conductivity, and examples thereof include inorganic solid electrolytes such as oxide-based electrolytes and sulfide-based electrolytes. The binder is not particularly limited as long as it can improve binding properties, and examples thereof include styrene butadiene rubber.

[0058] An intermediate layer having the function of uniformly depositing lithium metal may be formed between the negative electrode and the solid electrolyte layer. This stabilizes the interface between the intermediate layer and the solid electrolyte layer. In this case, the all-solid-state lithium metal battery may be an anode-free battery in which a lithium metal layer is not formed at the time of initial charge. In the anode-free battery, a lithium metal layer is formed after the initial charge / discharge.

[0059] The intermediate layer contains a metal capable of alloying with lithium and amorphous carbon, and may further contain a binder, etc. The metal capable of alloying with lithium and amorphous carbon are preferably nanoparticles. Examples of metals capable of alloying with lithium include tin (Sn), silicon (Si), zinc (Zn), magnesium (Mg), gold (Au), platinum (Pt), palladium (Pd), silver (Ag), aluminum (Al), bismuth (Bi), and antimony (Sb). Examples of amorphous carbon include carbon blacks such as acetylene black, furnace black, and ketjen black, as well as coke and activated carbon. The amorphous carbon may be graphitizable carbon (soft carbon), non-graphitizable carbon (hard carbon), CNT (carbon nanotube), fullerene, or graphene. The binder is not particularly limited as long as it can improve binding properties, and examples include polyvinylidene fluoride (PVDF).

[0060] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and the above-described embodiments may be modified as appropriate within the scope of the spirit of the present invention. [Example]

[0061] Examples of the present invention will be described below, but the present invention is not limited to these examples.

[0062] [Example 1] Using a coating device 10, a positive electrode composite layer was intermittently formed on a positive electrode current collector. Specifically, while continuously conveying an aluminum foil as a substrate M, a first slurry L1 for the positive electrode composite layer was intermittently ejected from a first die head 12 toward a first surface region S1 of the continuously conveyed substrate M to intermittently form a positive electrode composite layer as a first coating section C1. At this time, a first gas A1 was ejected from a first air nozzle 13 toward the end of the intermittently ejected first slurry L1. Here, the positive electrode composite layer slurry used contained lithium iron phosphate as a positive electrode active material and had a viscosity at 25°C of 2000 mPa·s or more and 2500 mPa·s or less, and the first air nozzle 13 used an air nozzle having a first ejection port 13a with a width of 1 mm. The coating speed of the first slurry L1 (the conveying speed of the material M to be coated) was set to 10 m / min, and the ejection pressure of the first gas A1 was set to 500 kPa.

[0063] [Comparative Example 1] A positive electrode composite layer was intermittently formed on the positive electrode current collector in the same manner as in Example 1, except that the first gas A1 was not sprayed from the first air nozzle 13 toward the terminal end of the intermittently discharged first slurry L1.

[0064] Comparative Example 2 A positive electrode mixture layer was intermittently formed on a positive electrode current collector in the same manner as in Example 1, except that a blowback air knife was used instead of first air nozzle 13.

[0065] [Drag] The drag at the end of the discharged first slurry L1 was measured.

[0066] Table 1 shows the drag evaluation results.

[0067] [Table 1]

[0068] Table 1 shows that drag is reduced in Example 1. In contrast, in Comparative Example 1, the first gas A1 was not sprayed from the first air nozzle 13 toward the end of the intermittently discharged first slurry L1, resulting in greater drag at the end of the discharged first slurry L1. Furthermore, in Comparative Example 2, the first gas A1 was sprayed, resulting in less drag than in Comparative Example 1. However, since the air knife does not have the first main body portion 61 and the second main body portion 62, it cannot be brought close to the first discharge port 12a of the first die head 12, and therefore the first gas A1 cannot be sprayed efficiently. As a result, drag is greater than in Example 1. [Explanation of symbols]

[0069] 10 Coating device 11 Conveyor roller 12 First die head 12a 1st outlet 13 First air nozzle 13a 1st spout 14 Second die head 14a 2nd outlet 15 Second air nozzle 15a 2nd spout 61 First main body part 62 Second main body part 63 1st supply port 64 First gas junction 71 Third main body 72 Fourth main body 73 2nd supply port 74 Second gas junction A1 First Gas A2 Second Gas C1 1st Coating Department C2 2nd Coating Department D1, D2 conveying direction G Groove I Inclined surface L1 First slurry L2 Second slurry M Covered material S1 1st surface area S2 2nd surface area W width direction

Claims

1. A conveying unit that continuously conveys a sheet-shaped material to be coated; a first die head that intermittently ejects a first slurry toward a first surface region of the continuously transported workpiece to intermittently form a first coated portion; a first gas ejection unit that ejects a first gas toward a terminal end of the first slurry that is intermittently ejected, The first die head discharges the first slurry in a direction substantially perpendicular to the conveying direction of the workpiece in the first surface region, and has a slit-shaped first discharge port extending in the width direction of the conveying section, the first gas jetting section jets out the first gas in a direction substantially parallel to the conveying direction of the workpiece in the first surface region, and has a slit-shaped first jetting port extending in the width direction of the conveying section, and a first main body section and a second main body section extending in the width direction of the conveying section; the first jetting port is formed between the first body portion and the second body portion, the first gas ejection unit is disposed so that the first ejection port is located near the first discharge port, and the first body unit and the second body unit are located on the first die head and conveying unit sides, respectively; The first body portion extends closer to the first die head than the second body portion.

2. the first gas ejection part further includes a plurality of first supply ports through which the first gas is supplied, and a first gas junction part that is connected to the plurality of first supply ports and the first ejection port and at which the first gases supplied from the plurality of first supply ports join together; The coating device according to claim 1 , wherein the plurality of first supply ports are arranged in a width direction of the conveying section.

3. the first supply port and the first gas junction portion have a dimension in a thickness direction that is larger than that of the first jet port, The coating device according to claim 2 , wherein the first gas junction has an inclined surface that is inclined toward the first gas ejection port.

4. The first main body portion has a groove portion formed therein that extends in the width direction of the conveying portion, the second main body portion is a plate-like member, The coating device according to claim 2 or 3, wherein the first gas junction is formed between the first main body portion and the second main body portion.

5. The apparatus further includes a second die head that intermittently ejects a second slurry toward a second surface region of the continuously transported workpiece to intermittently form a second coated portion; the second surface region is downstream of the first surface region; forming the second coated portion in an area where the first coated portion is not formed; 2. The coating device according to claim 1, wherein the second die head ejects the second slurry in a direction approximately perpendicular to the transport direction of the workpiece in the second surface region and has a slit-shaped second ejection outlet extending in the width direction of the transport section.

6. a second gas ejection unit that ejects a second gas toward a terminal end of the second slurry that is intermittently ejected; the second gas ejection section ejects the second gas in a direction substantially parallel to the conveying direction of the workpiece in the second surface region, and has a slit-shaped second ejection port extending in the width direction of the conveying section, and a third main body section and a fourth main body section extending in the width direction of the conveying section; the second ejection port is formed between the third body portion and the fourth body portion, the second gas ejection unit is disposed so that the second ejection port is located near the second discharge port, and the third body unit and the fourth body unit are located on the second die head and conveying unit sides, respectively; The coating device according to claim 5 , wherein the third body portion extends closer to the second die head than the fourth body portion.

7. A coating method using the coating device according to any one of claims 1 to 3, comprising: A coating method comprising the step of intermittently forming a first coated portion by intermittently ejecting the first slurry from the first die head toward a first surface region of the continuously transported sheet-like substrate while continuously transporting the substrate.

8. A coating method using the coating device according to claim 5 or 6, a step of intermittently forming first coated portions by intermittently ejecting the first slurry from the first die head toward a first surface region of the continuously conveyed sheet-like material to be coated while continuously conveying the sheet-like material to be coated; and intermittently ejecting a second slurry from a second die head toward a second surface region of the continuously transported substrate to intermittently form a second coated portion.

9. A method for producing a positive electrode by the coating method according to claim 8, The substrate is a positive electrode current collector, the first slurry is a slurry for a positive electrode composite layer, The method for manufacturing a positive electrode, wherein the second slurry is a slurry for an insulating layer.

10. A method for producing a solid-state battery, comprising the step of obtaining a positive electrode by the method for producing a positive electrode according to claim 9.

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