JP2014022149A - Apparatus of manufacturing electrode for battery, nozzle for manufacturing electrode for battery and method of manufacturing electrode for battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form an active material pattern of stripes having a cross-sectional shape of high aspect ratio, in a technique for manufacturing the electrode for a battery having a structure provided with an active material layer of stripes on the surface of a substrate.SOLUTION: In a nozzle 21 discharging a coating liquid containing an active material, first discharge ports 211 for discharging the coating liquid, and second discharge ports 212 for discharging a gas (dry air) are arranged alternately. The nozzle 21 is disposed to face a sheet S transported in a predetermined direction, and while discharging the coating liquid from the first discharge ports 211, gas is blown from the second discharge ports toward the side of the coating liquid. Consequently, drying and hardening of the coating liquid are accelerated and the position of uncured coating liquid is stabilized, thus forming a pattern maintaining cross-sectional shape immediately after coating.

Description

  The present invention relates to an apparatus for manufacturing a battery electrode having a structure in which a stripe-shaped active material layer is provided on the surface of a substrate, a manufacturing method thereof, and a nozzle used for manufacturing the electrode.

  For example, as a method of manufacturing an electrode used in a chemical battery such as a lithium ion battery, the present applicant has previously applied a technique of applying a coating solution containing an active material material in a stripe shape to the surface of a base material that is a current collector. More disclosed. For example, in the technique described in Patent Document 1, an active material material is obtained by a nozzle scanning method in which a nozzle having a large number of discharge ports arranged in a predetermined direction is scanned and moved with respect to the substrate surface and a coating liquid is discharged from each discharge port Is applied to the substrate surface to form a large number of stripe-shaped active material patterns parallel to each other.

Japanese Unexamined Patent Publication No. 2011-070788 (for example, FIG. 2)

  In the battery electrode having such a striped active material pattern, the amount of the active material is increased to increase the battery capacity, and the surface area of the active material layer is increased to improve the charge / discharge characteristics. It is effective that the cross-sectional shape of each stripe pattern has a large aspect ratio, that is, a ratio of height to width. However, in the case of a coating solution having a fluidity that can be satisfactorily applied by the nozzle scan method described above, the cross-sectional shape immediately after application may gradually collapse due to a leveling action caused by gravity spreading or spreading along the substrate surface after application. Unavoidable. In addition, the higher the aspect ratio of the cross-sectional shape of the pattern, the higher the risk of pattern inclination and collapse before curing. Therefore, establishment of a technique capable of forming an active material pattern having a cross-sectional shape with a high aspect ratio more stably is desired.

  The present invention has been made in view of the above problems, and in a technique for manufacturing a battery electrode having a structure in which a stripe-shaped active material layer is provided on the surface of a base material, It is an object to provide a technique capable of stably forming an active material pattern.

  One aspect of the present invention is a battery electrode manufacturing apparatus having a first discharge port for discharging a coating liquid containing an active material, and sandwiching the first discharge port in order to achieve the above object. A nozzle in which a second discharge port for discharging gas is arranged on each side of the first discharge port, the first discharge port and the second discharge port are arranged in a horizontal direction and are brought close to the surface of the substrate. A relative movement execution unit that relatively moves the nozzle relative to the substrate surface, and the relative movement execution unit moves the nozzle relative to the substrate surface while moving the first discharge port. Discharged the coating liquid and applied the coating liquid on the surface of the base material in stripes, and the second discharge port discharged gas and was discharged from the first discharge port to the base material surface. The gas is sprayed on the side of the coating solution.

  According to another aspect of the present invention, there is provided a method for manufacturing an electrode for a battery. In order to achieve the above object, the first discharge port for discharging a coating liquid containing an active material is provided. A nozzle in which a second discharge port for discharging gas is disposed on both sides of the first discharge port with the first discharge port and the second discharge port being brought close to the surface of the substrate. While disposing the nozzle relative to the substrate surface, the coating solution is discharged from the first discharge port to apply the coating solution on the substrate surface in stripes, Spraying the gas discharged from the second discharge port onto the side of the coating liquid discharged from the first discharge port to the surface of the substrate.

  In the invention thus configured, the gas discharged from the second discharge port is blown onto the side portion of the coating liquid discharged from the first discharge port of the nozzle to the surface of the base material. Thereby, drying in the side part of a coating liquid is accelerated | stimulated and hardening of a coating liquid advances, maintaining the cross-sectional shape immediately after application | coating. In addition, since the airflow blown to the side of the coating liquid contributes to maintaining the posture, it is possible to effectively prevent the inclination and collapse of the coating liquid that is being cured to the side. For these reasons, according to the present invention, it is possible to stably form a stripe-shaped active material pattern having a cross-sectional shape with a high aspect ratio by applying a coating liquid.

  Another aspect of the present invention is a nozzle for manufacturing a battery electrode, and in order to achieve the above object, a first discharge port for discharging a coating liquid containing an active material and a second discharge for discharging a gas. An outlet is provided, and the second discharge ports are provided on both sides of the first discharge port with the first discharge port interposed therebetween, and the first discharge port and the second discharge port are arranged in a line.

  The nozzle having such a structure can be suitably applied to the above-described battery electrode manufacturing apparatus and manufacturing method, and the second discharges gas to both sides of the first discharge port for discharging the coating liquid. Has a discharge port. According to this configuration, the gas from the second discharge port can be blown to the side of the coating liquid containing the active material discharged from the first discharge port. Therefore, it can be suitably used to produce an active material pattern that maintains the cross-sectional shape immediately after coating.

  The nozzle according to the present invention has, for example, a configuration in which three or more second discharge ports are provided in a line and one first discharge port is provided between adjacent second discharge ports. Also good. With such a configuration, two or more first discharge ports and three or more second discharge ports are alternately arranged along the arrangement direction, and the second discharge ports are always provided on both sides of each first discharge port. Will be placed. By using such a nozzle, it is possible to simultaneously form a plurality of stripe patterns, and it is possible to manufacture a battery electrode having a plurality of active material patterns with excellent productivity.

  Further, for example, the second discharge port may be configured to discharge gas toward the rear in the relative movement direction of the nozzle with respect to the base material. If it does in this way, it will become possible to spray the gas from a 2nd discharge port directly with respect to the coating liquid discharged to the base material from the 1st discharge port, and accelerates | stimulates the drying hardening of a coating liquid effectively. The change in the cross-sectional shape can be suppressed.

  Further, for example, the normal direction of the opening surface of the first discharge port and the normal direction of the opening surface of the second discharge port may be configured to be the same. Thereby, the discharge direction of a coating liquid and the discharge direction of gas can be made to correspond substantially, and gas can be reliably sprayed on the side part of the coating liquid immediately after discharge.

  In addition, for example, relative movement of the nozzle with respect to the base material is realized by transporting a sheet-like base material that is stretched around a plurality of rollers in a predetermined transport direction by rotation of the roller, and the nozzle is wound around one roller. You may comprise so that it may be opposingly arranged by the winding area | region of the made base material. In such a configuration, relative movement with the nozzle is realized by the conveyance of the sheet-like base material, and the base material may wave or vibrate on the conveyance path. By making the nozzle face the surface of the substrate wound around the roller and discharging the coating liquid and gas from the nozzle, the coating can be performed in a state where the positional relationship between the nozzle and the substrate is stabilized. Thereby, an active material pattern having a stable shape can be formed.

  Further, for example, heated gas may be discharged from the second discharge port, and a gas heating unit for this purpose may be further provided. By spraying the heated gas onto the coating solution, it is possible to reliably dry and cure the coating solution in a shorter time.

  According to the present invention, a stripe-shaped active material pattern having a high-aspect-ratio cross-sectional shape can be stably formed by blowing an airflow against the side of the coating liquid immediately after being applied to the substrate surface. Can do.

It is a figure which shows schematic structure of one Embodiment of the electrode manufacturing apparatus for batteries concerning this invention. It is a 1st figure which shows the structure and function of a nozzle. It is a 2nd figure which shows the structure and function of a nozzle. It is a figure explaining the effect of the airflow in this embodiment. It is a figure which shows the other example of arrangement | positioning of a discharge outlet.

  FIG. 1 is a diagram showing a schematic configuration of an embodiment of a battery electrode manufacturing apparatus according to the present invention. This battery electrode manufacturing apparatus (hereinafter abbreviated as “electrode manufacturing apparatus”) 1 is a main component of a manufacturing process of a battery electrode used as an electrode of a lithium ion secondary battery, for example. For a battery in which a current collector and an active material are laminated by forming an active material layer on a surface of a metal sheet S that functions as a current collector in a battery and applying an active material material on the surface of the metal sheet S An apparatus for manufacturing an electrode.

  For the following explanation, XYZ coordinate axes are set as shown in FIG. Here, the XY plane is a horizontal plane, and the Z axis coincides with the vertical axis. The positive direction on the Z-axis is a vertically upward direction.

  The electrode manufacturing apparatus 1 includes a transport unit 10 for transporting the sheet S in the transport direction Dt, and a coating unit 20 that applies a coating liquid containing an active material to the transported sheet S. The conveyance unit 10 holds the sheet S before forming the active material wound in a roll shape, and winds the sheet S after the active material layer is formed, and a supply roller 11 that feeds the sheet S at a constant speed. A take-up roller 12 is provided. Two tension rollers 13 and 14 and a nozzle facing roller 15 are further provided on the conveyance path from the supply roller 11 to the take-up roller 12. Some of these are rotationally driven by the roller drive unit 19 to convey the sheet S, and others are driven rollers that rotate as the sheet S moves.

  The sheet S is stretched around these rollers and is conveyed at a constant speed in the arrow direction Dt as the rollers rotate. In the example of FIG. 1, the supply roller 11 and the take-up roller 12 each have a rotation axis parallel to the Y axis, and the rollers 11 and 12 rotate according to a drive signal from the roller drive unit 19. The sheet S is conveyed in a direction parallel to the X axis (horizontal direction) and in a direction parallel to the Z axis (vertical direction).

  The nozzle facing roller 15 is provided between the two tension rollers 13 and 14 on the transport path, and the tension applied to the sheet S wound around the nozzle facing roller 15 during transport is the tension rollers 13 and 14. Is kept constant. In the winding region Sr of the sheet S wound around the nozzle facing roller 15, the nozzle 21 of the coating unit 20 is disposed in close proximity to the surface of the sheet S. It is desirable that the sheet S be kept as flat as possible as long as possible on the downstream side in the transport direction Dt from the position facing the nozzle 21. The nozzle 21 discharges a coating liquid containing an active material toward the surface of the sheet S conveyed at a constant speed, thereby forming a stripe-shaped active material pattern extending along the conveyance direction Dt on the surface of the sheet S. .

  In addition to the nozzle 21, the coating unit 20 includes a coating liquid supply unit 22 that supplies a coating liquid containing an active material toward the nozzle 21, and a gas that supplies a gas such as dry air or nitrogen gas toward the nozzle 21. A supply unit 23 and a heating unit 24 that warms the gas to a predetermined temperature are provided.

  The nozzle 21 receives the supply of the application liquid containing the active material from the application liquid supply unit 22 and applies the application liquid to the surface of the sheet S. The nozzle facing roller 15 provided on the opposite side of the nozzle 21 with the sheet S interposed therebetween functions as a backup roller that enables a stable application while maintaining the positional relationship between the nozzle 21 and the sheet S constant.

Here, as a material used for this manufacturing process, the following are mentioned, for example. For example, in the process of manufacturing a positive electrode of a lithium ion battery, for example, an aluminum foil can be used as the sheet S that serves as a current collector. In this case, as the active material (positive electrode active material), for example, a material mainly composed of LiCoO ₂ (LCO), LiNiO ₂ or LiFePO ₄ , LiMnPO ₄ , LiMn ₂ O ₄ , or LiMeO ₂ (Me = MxMyMz; Me, M is a transition metal, and a compound typically represented by x + y + z = 1), for example, LiNi _1/3 Mn _1/3 Co _1/3 O ₂ , LiNi _0.8 Co _0.15 Al _0.05 O ₂ or the like can be used.

Further, for example, in the process of manufacturing the negative electrode of a lithium ion battery, for example, a copper foil can be used as the sheet S that becomes the current collector. In this case, as the active material (negative electrode active material), for example, a material mainly composed of Li ₄ Ti ₅ O ₁₂ (LTO), C, Si, Sn, or the like can be used.

  As the coating liquid containing the active material, in addition to the above-mentioned active material, acetylene black or ketjen black as a conductive additive, polyvinylidene fluoride (PVDF), styrene butadiene rubber (SBR), polyvinyl as a binder. A mixture of pyrrolidone (PVP), polyvinyl alcohol (PVA), polytetrafluoroethylene (PTFE), N-methyl-2-pyrrolidone (NMP) as a solvent, or the like can be used. As a coating liquid applied to coating by ejection from the nozzle 21, a paste-like liquid having a viscosity of 100 Pa · s to 10000 Pa · s is preferable.

  2 and 3 are diagrams showing the structure and function of the nozzle. More specifically, FIG. 2A is a diagram schematically showing how the coating liquid is applied by the nozzle 21, and FIG. 2B is a diagram showing the structure of the lower surface of the nozzle 21. FIG. 3A is a side view schematically showing the internal structure of the nozzle 21 and the discharge state of the coating liquid and gas, and FIG. 3B is a perspective view thereof.

  As shown in FIG. 2B, a plurality of (eight in this example) first discharge ports 211 opening in a rectangular shape are formed on the lower surface 210 of the nozzle 21, and the width of the sheet S perpendicular to the sheet conveyance direction Dt. It is perforated at equal intervals in a row along the direction, that is, the Y direction. The first discharge port 211 discharges the coating liquid supplied from the coating liquid supply unit 22. In addition, a plurality of (in this example, nine) second discharge ports 212 are arranged in a row so as to sandwich the first discharge ports 211 arranged in a row from both sides in the Y direction. The second discharge port 212 discharges the gas supplied from the gas supply unit 23 via the heating unit 24. As described above, the first discharge ports 211 and the second discharge ports 212 are alternately arranged in the Y direction on the lower surface 210 of the nozzle 21, and the most in the (+ Y) direction and (−Y) direction of the arrangement. The outer sides are all second discharge ports 212.

  The first discharge port 211 and the second discharge port 212 are both open in the same plane (nozzle lower surface 210), and the normal directions of these opening surfaces coincide with each other. Therefore, the discharge direction of the coating liquid and the discharge direction of the gas are substantially the same, and the coating liquid and the gas are discharged in substantially the same direction.

  As shown in FIG. 2A, the nozzle 21 is disposed close to and opposed to the upper surface of the sheet S, and the lower surface 210 provided with the first and second discharge ports is tilted in the X direction, not directly below. , And is supported by a support member (not shown).

  Although the opening size of the 1st and 2nd discharge outlets 211 and 212 is illustrated, the dimension and shape of a discharge outlet are not limited to what is described here, but are arbitrary. As for the size of the first discharge port 211 and the second discharge port 212 in this embodiment, the opening length in the X direction is, for example, 20 μm to 100 μm. The opening length in the Y direction is, for example, 50 μm to 100 μm. Further, the arrangement pitch is 100 μm to 300 μm. In FIG. 2B, the opening sizes of the first discharge port 211 and the second discharge port 212 are illustrated differently in order to facilitate the identification of the two types of discharge ports, but this is essential. Both of them may be the same size. The nozzle 21 having such a fine opening can be produced by, for example, electric discharge machining of a metal block.

  As shown in FIG. 2A, when the nozzle 21 discharges the coating liquid from the discharge port 211 in a state where the sheet S is transported in the transport direction Dt, the upper surface of the sheet S is transported in the transport direction Dt (that is, the X direction). A plurality of stripes are formed by a plurality of coating liquids extending parallel to each other. By drying and curing this, a plurality of stripe-shaped active material patterns P1 parallel to each other are formed on the surface of the sheet S. At this time, by using a mixture prepared in the form of a paste having a relatively high viscosity as the coating liquid, the active material pattern having a high aspect ratio (the ratio of the height to the pattern width) of the cross-section is substantially maintained while the shape immediately after discharge is maintained. Can be formed.

  However, the pattern shape may change due to the fluidity remaining in the coating solution until the discharged coating solution is dried and cured. That is, there is a possibility that the pattern whose aspect ratio is reduced due to the leveling action due to gravity or the surface tension of the coating liquid, the fold or inclination of the pattern top surface, and the pattern collapse when it is severe. Therefore, in this embodiment, a second discharge port 212 for discharging gas is provided on both sides of the first discharge port 211 for discharging the coating liquid.

  As shown in FIG. 3A, inside the nozzle 21, a coating liquid supply path 213 that communicates with the coating liquid supply section 22, and a gas supply path 214 that communicates with the gas supply section 23 via the heating section 24. Are provided independently, and these openings in the nozzle lower surface 210 serve as a first discharge port 211 and a second discharge port 212, respectively. The coating liquid fed through the coating liquid supply path 213 is discharged from the first discharge port 211, applied to the surface of the sheet S, and dried and cured to form an active material pattern P1 on the sheet S.

  On the other hand, the second discharge port 212 provided adjacent to the first discharge port 211 discharges the gas supplied from the gas supply unit 23 (heated dry air in this embodiment). The gas from the second discharge port 212 is blown out so as to spread around the normal direction of the opening surface of the second discharge port 212, and the airflow AF formed thereby is as shown in FIG. The part sprays on the side part Ps of the coating liquid immediately after discharge. This air flow accelerates the drying and curing of the coating liquid, particularly its side portions, and the conversion to the solid active material pattern P1 proceeds in a short time. Further, by blowing the airflow AF from both sides so as to sandwich the applied coating liquid, the inclination and bending of the pattern top and the collapse of the pattern are effectively prevented. Due to these actions, in this embodiment, the change in the cross-sectional shape of the coating liquid applied to the surface of the sheet S is suppressed, and an active material pattern P1 in which a high aspect ratio immediately after discharge is maintained is obtained. If the gas discharged from the second discharge port 212 is preliminarily heated, the effect of drying the coating liquid becomes more remarkable.

  The gas from the second discharge port 212 flows along the surface of the sheet S substantially in the same direction as the transport direction Dt of the sheet S. When viewed from the sheet S, the nozzle 21 moves relative to the sheet S in the (−Dt) direction, so the gas from the second discharge port 212 has a component toward the rear side in the movement direction of the nozzle 21. Will be blown out. Therefore, the air flow AF flows between the active material patterns P1 along the surface of the sheet S and flows backward in the moving direction of the nozzle 21 while colliding with the surface of the sheet S and the pattern side portion Ps. As a result, the effect of maintaining the posture of the pattern and promoting drying by the airflow AF can be maintained for a longer time.

  FIG. 3B shows only one first discharge port 211 and two second discharge ports 212 sandwiching the first discharge port 211 in order to facilitate understanding of the operation of each part in the nozzle 21. As described above, in this embodiment, the nozzle 21 is provided with a plurality of first discharge ports 211 and a plurality of second discharge ports 212 sandwiching each of the first discharge ports 211. Since the outermost side in the arrangement of the discharge ports is the second discharge port 212 for discharging gas, it is possible to blow the airflow AF on both sides of all patterns.

  FIG. 4 is a diagram for explaining the effect of airflow in this embodiment. More specifically, FIG. 4A is an overview diagram showing an active material pattern of an ideal shape, and FIG. 4B is a cross-sectional view thereof. On the other hand, FIG. 4C is a schematic view showing an active material pattern of a comparative example, and FIG. 4D is a sectional view thereof.

  The ideal shape of the active material pattern P1 is a stripe shape extending straight along the X direction as shown in FIG. 4A, and the cross section immediately after ejection is shown in FIG. 4B. The shape of the coating liquid (that is, the opening shape of the first discharge port 211) is maintained. However, when the coating liquid is simply discharged from the nozzle and applied to the sheet S, as shown in FIGS. 4C and 4D as a comparative example, a pattern having a shape deviating from the ideal shape as described above is used. There is a risk of becoming.

  FIG. 4C and FIG. 4D are diagrams showing examples of such a defective pattern. In the pattern P21 in the figure, the entire pattern is wavy and the top of the pattern is wavy. . In the pattern P22, the pattern does not stand vertically from the surface of the sheet S, and the entire pattern is inclined. In the pattern P23, the top of the pattern is bent in one direction when viewed in the cross-sectional direction. In the pattern P24, leveling occurs due to the fluidity of the coating solution, and the cross-sectional shape is crushed. Further, the pattern P25 is the entire pattern lying on its side.

  Such a defective pattern causes a contact between adjacent patterns and a deviation of the surface area from a design value, and causes a problem that an expected performance cannot be obtained in the finally manufactured electrode and battery. On the other hand, in the present embodiment, the pattern shape is idealized by blowing the airflow AF to the side portion Ps of the coating liquid discharged on the surface of the sheet S to stabilize the posture of the coating liquid before drying and curing. We are approaching and avoiding such problems.

  As described above, in this embodiment, the electrode manufacturing apparatus 1 functions as the “battery electrode manufacturing apparatus” of the present invention, and the sheet S corresponds to the “base material” of the present invention. The supply roller 11, the take-up roller 12 and the roller drive unit 19 function as a “relative movement execution unit” of the present invention. In the above embodiment, the heating unit 24 functions as the “gas heating means” of the present invention.

  The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention. For example, each of the nozzles 21 of the above-described embodiment is configured such that the first discharge ports 211 and the second discharge ports 212 each having a rectangular opening shape are arranged in a line. It is not limited to an aspect, For example, the structure illustrated below may be sufficient.

  FIG. 5 is a view showing another arrangement example of the discharge ports. In the nozzle 21a of another embodiment shown in FIG. 5A, a plurality of first discharge ports 211a and a plurality of second discharge ports 212a are arranged in a line in the Y direction, but the first discharge ports 211a. And the second discharge port 212a are not the same row. This is a so-called staggered arrangement, but the same effect as in the above embodiment can be obtained also by the first discharge port 211a and the second discharge port 212a configured in such a positional relationship. However, if the distance between the first discharge port and the second discharge port is increased, it becomes difficult to guide the airflow from the second discharge port to the side of the coating liquid. Therefore, the first discharge port, the second discharge port, Is preferably as close as possible.

  In the example shown in FIG. 5B, the nozzle 21b is provided with a rectangular first discharge port 211b and a circular or elliptical second discharge port 212b. Thus, the opening shape of the first discharge port and the second discharge port is not limited to a rectangle and is arbitrary. In particular, since the cross-sectional shape of the first discharge port that discharges the coating liquid is a factor that determines the cross-sectional shape of the active material pattern to be formed, it is appropriately set according to the required cross-sectional shape of the active material pattern. That's fine.

  In the nozzle 21c shown in FIG. 5C, the opening surface of the first discharge port 211c and the opening surface of the second discharge port 212c belong to different planes. That is, the opening surfaces of the plurality of first discharge ports 211c are the same plane, and the opening surfaces of the plurality of second discharge ports 212c are the same plane, but the opening surfaces of the second discharge ports 212c are It is in a position retracted from the nozzle tip side with respect to the opening surface of the first discharge port 211c. In other words, the first discharge port 211c protrudes toward the nozzle tip side. The nozzle 21c having such a structure can provide the same effect as described above. Further, the side surface of the protruding portion of the first discharge port 211c also has a function of controlling the direction of airflow.

  Further, in the above embodiment, the plurality of first discharge ports and the plurality of second discharge ports are alternately arranged, so that the active material pattern formed by the plurality of first discharge ports can be removed from the second discharge port. An airflow is formed. That is, the airflow discharged from one of the second discharge ports excluding the outermost one is in the posture of two patterns by the coating liquid discharged from the two first discharge ports on both sides of the second discharge port. Contributes to maintenance. In contrast, two or more second discharge ports may be provided between the plurality of first discharge ports. If it does in this way, by setting the discharge direction of the gas from each 2nd discharge port separately, gas can be directly sprayed, for example toward a pattern side part, and it can also raise the posture maintenance effect of a pattern further. Become.

  In the above embodiment, heated dry air is used as the gas discharged from the second discharge port, but other gas species, for example, an inert gas such as nitrogen gas may be used. In addition to this, various gases can be used as long as they do not chemically act on the coating liquid immediately after discharge. Gas heating may be omitted.

  Moreover, although the said embodiment has the supply source (gas supply part 23) of the gas discharged from the nozzle 21 in the coating unit 20, it introduces and discharges the gas from an external gas supply source to a nozzle. It may be a configuration.

  Moreover, in the said embodiment, although the metal sheet S used as a collector in the battery electrode after completion is used as the “base material” of the present invention, the base material is not limited to this. For example, a resin sheet laminated with a metal foil serving as a current collector may be used as the “base material” of the present invention. For example, a thin film of an active material is previously formed on the surface of the metal foil serving as a current collector. You may use what was formed as a "base material." Further, the present invention may be applied to further laminate the active material layer of the other electrode by using a laminate of a solid electrolyte layer or a separator on the electrode of one electrode as the “base material” of the present invention.

  Moreover, although the said embodiment forms an active material pattern in the surface using the roll-shaped metal sheet S as a base material, a nozzle is moved relatively with respect to a sheet-like base material, and an active material pattern is formed. The present invention can also be applied to technology. Further, in realizing the relative movement, a configuration may be adopted in which the base is fixed and the nozzle is moved. Further, relative movement may be realized by placing the substrate on a stage or the like and moving the stage or the like with respect to the fixed nozzle.

  Further, the materials such as the current collector, active material, and electrolyte exemplified in the above embodiment are only examples, and are not limited thereto, and other materials used as a constituent material of the lithium ion battery are used. Thus, the present invention can also be suitably applied to the manufacture of lithium ion battery electrodes. Further, the present invention can be applied not only to lithium ion batteries but also to all manufacturing techniques for battery electrodes having a structure in which a base material and an active material layer are laminated.

  The present invention can be applied to all techniques for manufacturing battery electrodes by applying a coating liquid containing an active material to the surface of a substrate.

1 Electrode manufacturing equipment (battery electrode manufacturing equipment)
11 Supply roller (relative movement execution unit)
12 Winding roller (relative movement execution unit)
19 Roller drive unit (relative movement execution unit)
21 Nozzle 24 Heating part (gas heating means)
211 First discharge port 212 Second discharge port S Sheet (base material)
Sr (Area where the sheet S is wound on the nozzle facing roller 15)

Claims (11)

A nozzle having a first discharge port for discharging a coating liquid containing an active material, and a second discharge port for discharging gas to each of both sides of the first discharge port across the first discharge port;
A relative movement execution unit that moves the nozzle relative to the substrate surface in a state where the first discharge port and the second discharge port are arranged in a horizontal direction and are close to the surface of the substrate; ,
While the relative movement execution unit moves the nozzle relative to the substrate surface, the first discharge port discharges the coating solution to apply the coating solution on the substrate surface in stripes, The battery electrode manufacturing apparatus, wherein the second discharge port discharges gas and sprays the gas onto a side portion of the coating liquid discharged from the first discharge port onto the substrate surface.   2. The nozzle according to claim 1, wherein three or more second discharge ports are provided in a line in the nozzle, and the first discharge ports are provided one by one between the second discharge ports adjacent to each other. Battery electrode manufacturing equipment.   The battery electrode manufacturing apparatus according to claim 1, wherein the second discharge port discharges the gas toward a rear side in a relative movement direction of the nozzle with respect to the base material.   The relative movement execution unit conveys the sheet-like substrate spanned by a plurality of rollers in a predetermined conveyance direction by rotation of a roller, and the nozzle is wound on one of the rollers wound around the roller. The battery electrode manufacturing apparatus according to claim 1, wherein the battery electrode manufacturing apparatus is disposed so as to face the winding region.   The battery electrode manufacturing apparatus according to claim 1, further comprising gas heating means for supplying the heated gas to the nozzle.   A first discharge port that discharges a coating liquid containing an active material and a second discharge port that discharges a gas; and the second discharge port is located on each of both sides of the first discharge port with the first discharge port interposed therebetween. A nozzle for manufacturing a battery electrode, the first discharge port and the second discharge port being arranged in a line.   7. The battery electrode according to claim 6, wherein three or more second discharge ports are provided side by side in a line, and one first discharge port is provided between the second discharge ports adjacent to each other. Nozzle for manufacturing.   The nozzle for manufacturing a battery electrode according to claim 6 or 7, wherein a normal direction of the opening surface of the first discharge port and a normal direction of the opening surface of the second discharge port are the same. A nozzle having a first discharge port for discharging a coating liquid containing an active material, and a second discharge port for discharging gas on each side of the first discharge port with the first discharge port interposed therebetween, A step of placing the first discharge port and the second discharge port close to the surface of the substrate so as to face the substrate;
While the nozzle is moved relative to the substrate surface, the coating solution is discharged from the first discharge port to apply the coating solution on the substrate surface in a stripe shape, and from the first discharge port. And a step of blowing a gas discharged from the second discharge port onto a side portion of the coating liquid discharged onto the substrate surface.   The method for manufacturing a battery electrode according to claim 9, wherein the gas is discharged from the second discharge port toward the rear in the relative movement direction of the nozzle with respect to the base material.   The method for manufacturing a battery electrode according to claim 9 or 10, wherein the heated gas is discharged from the second discharge port.

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