Art
[1]The present invention, a pair of slots formed in a pair of lower die block and the upper slot forming a, more specifically, the lower slot related to a slot die coater is a coating type of electrode active material slurry was converted into a movement of the It relates to a slot die coater consisting of an upper die block and a lower die block electrode active material slurry ejection position relationship of the lower slot and an upper slot by the relative motion of the upper die block to be provided with a so simple to adjust.
[2]
This application claims priority to an application for the Korea Patent Application No. 10-2017-0104380, filed 17 August 2017 letter, all information disclosed in the specification and drawings of that application is hereby incorporated by reference into this application.
[3]
In addition, the present application claims priority to an application for the Korea Patent Application No. 10-2018-0074840, filed on June 28, 2018 date, all information disclosed in the specification and drawings of that application is hereby incorporated by reference into this application do.
BACKGROUND
[4]
As the technology developed, and the demand for mobile devices increases the demand for secondary batteries as an energy source, and rapidly increasing, and this secondary battery includes an electrode assembly generating element as essential.
[5]
The electrode assembly comprises a positive electrode, a separator and a negative electrode having the at least stacked more than once type, the positive electrode and the negative electrode is a positive electrode active material slurry and a negative active material slurry on a current collector made of each aluminum foil and a copper foil is prepared is coated and dried .
[6]
In order to make uniform the charge and discharge characteristics of the secondary battery, in such a positive electrode active material slurry and a negative active material slurry is to be coated evenly on a current collector, is typically a slot die coating process for this purpose is carried out.
[7]
1, there is shown a schematic view of a slot die coating process. 1, the coating apparatus 10 is constituted by an electrode active material, slots which slurry is ejected die coater 20 and the coating roll 40, while rotating the coating roll (40) body (50) house a is coated.
[8]
The electrode active material slurry was discharged from the slot die coater 20 has been widely applied to one surface of the current collector 50 to form an electrode active material layer.
[9]
In some cases, forming one more layer on forming a layer electrode coating an electrode active material layer is further applied may be the electrode active material layer made of two layers formed. Thus, in order to form the electrode active material layer made of two layers, a slot die coater (70) containing the three die blocks 71, 72, 73 as shown in Figure 2 it is used. Slot die coater (70) is composed of two discharge ports (74, 75) for applying an additional electrode active material slurry on a first applied electrode active material slurry by discharging the electrode active material slurry at the same time continuously via formed between the die block adjacent can.
[10]
However, the process using such a slot die coater (70), to each other because they should use the electrode active material slurry to be discharged simultaneously from the other outlet (74, 75), to a desired thickness to form the electrode active material layer substantially rigid surface there is.
[11]
The interval between the general, the thickness of the electrode active material layer has a discharge port (74, 75) is influenced by the flow rate of the electrode active material slurry through, and the extrusion rate of the electrode active material slurry is each die block (71, 72, 73) because significantly affected, that in order to create the desired thickness experimentally by several coating perform a process, while the reassembled after each die block (71, 72, 73) decomposition adjust the gap and determine the flow rate re-work it is required to repeat.
[12]
However, the conventional slot die coater (70), because they are coupled to each other successively so as to form the three die blocks (71, 72, 73), two discharge ports 74 and 75, any one of the discharge ports (74 in order to adjust the gap, 75) and may require a separation of all of the die blocks 71, 72, 73, even isolate a single die block may affect the position of the other die blocks, and two discharge ports ( adjusting the 74, 75) individually is a difficult problem.
[13]
Moreover, the cause of repeated separation and reassembly of the die block, and to perform repeatedly the test coating is caused a delay of the process time and, also increased the consumption of the material of the electrode active material slurry greatly reduce the efficiency of the process overall It may be, and the other one hand, can be due to repeated disassembly and assembly are adversely affected in the life of a slot die coater.
[14]
Thus, the situation, the development of a slot die coater with an improved structure that can solve such a problem is urgently required.
Detailed Description of the Invention
SUMMARY
[15]
The invention, and the lower discharge port of only relative motion as been made in view of the above problems, the slot of a pair of slot die of all of the respective die block in a die coater decomposition and position, the upper and lower portions without the need to re-assemble and by making possible to easily adjust the difference in the time for ejecting the electrode active material slurry from the upper discharge ports to enhance the fairness in one object.
[16]
However, the technical problem to be solved by the present invention may be clearly understood to those skilled in the art from the description of the invention described below is not limited to the above-described problems, that are not mentioned yet another task are.
Problem solving means
[17]
Slot in accordance with one embodiment of the present invention for solving the above problems is a die coater, a slot die coater coating the electrode active material slurry on the current collector, the lower die having a lower discharge opening; And an upper die disposed on an upper portion of the lower die having an upper discharge ports; When in the included and the upper surface and the upper die of the lower die is capable of mutually tangent, the upper die and the lower die are either side sliding along the sliding surface relative movement in the horizontal direction so that a part at least forms a sliding surface It is provided to.
[18]
According to one aspect, the upper discharge port may be located at the rear by a predetermined distance than the lower ejection opening.
[19]
According to another aspect, the discharge direction of the lower discharge opening and the upper discharge ports can be achieved an angle of 30 degrees to 60 degrees.
[20]
Preferably, the lower die includes a first die block, interposed between the second die block and said first die block and a second die block positioned at an upper portion of the first die block the first die block and the second between the die block may include a first spacer to be formed with the lower ejection opening.
[21]
Preferably, the upper die, the third die blocks, interposed between the fourth die block and the third die block and a fourth die block positioned at an upper portion of the third die blocks and the third die blocks and the fourth between the die block may comprise a second spacer to form an upper discharge port.
[22]
According to yet another aspect, it said first die block has a first slurry accommodated provided, said third die block portion for receiving a first electrode active material slurry can be provided with a second slurry receiving unit configured to receive a second electrode active material slurry have.
[23]
Preferably, the first spacer having a first opening formed on its one side, and the second spacer comprises a second opening formed on its one side, the first openings communicating with the first slurry containing part and, the second opening portion may be in communication with the second slurry containing part.
[24]
According to yet another aspect, the second die block has a first planar portion and a first angled comprising a, and the third die block and extending at a predetermined angle from the first portion first flat is, a second flat portion, and the the it may include a second inclined portion from the second flat portion extending parallel to the angle of the first inclined portion.
[25]
Preferably, the first and second flat portions and the flat portions facing each other contact each other and extend in the direction parallel to the first inclined portion and the second slanted portion may mutually face-to-face contact with each other and extend in the parallel direction.
[26]
Preferably, between the first flat portion of the first opening-side end portion and said second flat portion and the second opening-side end has a predetermined height difference can be formed.
Effects of the Invention
[27]
According to an aspect of the invention, slot die decomposition all of each of the die block in a coater and reassembly without the need, the upper and lower pair of slots relative movement slurry of only the electrode in the lower discharge opening and the upper discharge opening active material of the die positioned to the becomes possible easily to adjust the difference between the time of discharging, which is the fairness of the multi-layer coating process, the active material can be improved due.
Brief Description of the Drawings
[28]
Intended to illustrate the following figures attached to the specification are exemplary of the invention, the components which serve to further understand the spirit of the invention and together with the description of which will be described later invention, the details of this invention is described in such figures be construed as limited only is not.
[29]
1 is a schematic diagram showing a use example of a slot die coater in accordance with the prior art.
[30]
Figure 2 is a cross-sectional view showing the shape of the slot die coater in accordance with the prior art active material used in the multilayer coating process.
[31]
3 is a vertical cross-sectional view showing a slot die coater in accordance with one embodiment of the present invention.
[32]
4 is an exploded perspective view of a slot die coater in accordance with one embodiment of the present invention.
[33]
Figure 5 is a view showing a case where in the slot die coater in accordance with one embodiment of the present invention, the lower die and a position difference along the horizontal direction between a pair of the discharge ports by the relative movement between the upper die occurs.
[34]
6 is a vertical cross-sectional view showing a slot die coater in accordance with another embodiment of the present invention.
[35]
7 is a cross-sectional view of the slot, each of the die block forming the die coater shown in Fig. 6 are shown the mutual degradation of appearance.
[36]
Figure 8 is a view showing that the active material layer by a slot die coater in accordance with the present invention is formed of two layers.
Mode for the Invention
[37]
With reference to the accompanying drawings will be described a preferred embodiment of the present invention; Prior to this, the specification and are should not be construed as limited to the term general and dictionary meanings used in the claims, the inventor accordingly the concept of a term to describe his own invention in the best way It interpreted based on the meanings and concepts corresponding to technical aspects of the present invention on the basis of the principle that can be defined. Accordingly, the configuration shown in the examples and figures disclosed herein are in not intended to limit the scope of the present merely nothing but a preferable some embodiments of the present invention invention, a variety that can be made thereto according to the present application point It should be understood that there are equivalents and modifications.
[38]
[39]
3 and 4, will be explained a structure of a slot die coater 100 in accordance with one embodiment of the present invention.
[40]
Figure 3 is a vertical cross-sectional view showing a slot die coater in accordance with one embodiment of the present invention, Figure 4 is an exploded perspective view showing a slot die coater in accordance with one embodiment of the present invention.
[41]
Figures 3 and 4, an exemplary slot die coater 100 in accordance with an embodiment of the present invention includes an upper die having a lower die 110 and an upper discharge port (120A) having a lower discharge port (110A) ( 120) a.
[42]
The lower die 110 has a first and a die block 111, second die block 112 and the first spacer (113).
[43]
Said first die block 111, as an exemplary block diagram of the block located at the bottom of configuring a slot die coater 100 in accordance with an embodiment of the invention, with the side facing the second die block (112) achieve an angle of approximately 30 degrees to 60 degrees relative to the ground has a sloping form.
[44]
In addition, the first die block 111, and a second die block first slurry containing part (G1) formed of a groove shape having a predetermined depth on a surface opposed to the 112. Although not shown in the figures, such a first slurry containing part (G1) is connected to the active material slurry supply chamber provided on the outside receive the supply of the first active material slurry continuously. Although not shown, the first slurry containing part (G1) can include a slurry supply port in communication with the slurry feed chamber.
[45]
When in accordance with a first active material slurry supplied by the active material slurry feed chambers a first slurry containing part (G1) in a first active material slurry is full, the first active material slurry is first die block 111, first spacer (113 ) and second through a lower discharge opening (110A) formed by the sequential coupling of the die block 112 and is discharged to the outside.
[46]
Said second die block 112, first is disposed on top of the first die block 111 is coupled to the first spacer first die block 111 through 113, as with the first die block (111) , to achieve a first angle of approximately 30 degrees to 60 degrees relative to the side opposite to the die block 111 has a slanted surface shape. That is, the first die block 111 and second die blocks (112) to achieve a angle of approximately 30 degrees to 60 degrees with respect to both the respective opposing surfaces is ground and has an inclined form.
[47]
Also, the second die block 112, a top surface that is opposite the upper die 120 is divided into two areas. That is, the upper surface of said second die block (112) includes a first inclined portion (112b) extending from the first flat portion (112a) and a first flat portion (112a) which is located close to the relatively lower discharge port (110A) It includes.
[48]
The first flat portion (112a) is ground and extends in a direction parallel to the (XZ plane), the first inclined portion (112b) forms an such a first flat portion (112a) and the angle of approximately 30 degrees to 60 degrees angle to the bottom it has an inclined shape.
[49]
Thus, the second die block 112, and its upper surface can be matched with the upper die 120 with the lower surface of the shape which is provided with a sloping inclined surface, this corresponds to the flat surface and the surface parallel to the ground.
[50]
On the other hand, the first die block 111 and second die blocks 112, may be made of a metallic material, this first die block 111 and second die blocks 112 with each other by bolting bond It may be fastened.
[51]
[52]
And forming a gap between the first spacer 113, the first die block 111 and second die block is interposed between the 112 first die block 111 and second die blocks (112), This forms an area with a first active material slurry was supplied from the first slurry containing part (G1) can be discharged.
[53]
The first spacer 113 includes a first opening (113a) formed on its one side, so that the first spacer 113, the first die block 111 and second die blocks (112), respectively is the only through the remaining portion other than the border area of ​​one side of the facing surface. In addition, the first die block 111 and second die blocks (112) has a first opening (113a) is spaced apart from the formed area space in communication with a first slurry containing part (G1), that is a lower discharge port to form a (110A).
[54]
Wherein not the first spacer 113, with the exception of the area that the lower discharge port (110A) is formed, the first die block 111 and second die blocks (112) gap to not leak the first active material slurry between since functioning as a gasket, preferably made of a material which has elasticity capable of ensuring the sealing property.
[55]
[56]
And the upper die 120, the third block includes a die 121, a fourth die block 122 and a second spacer (123).
[57]
The third die block 121, a block which is located in the upper portion of the lower die 110, described earlier, that if this has a shape corresponding to the upper surface so as to be matched with the second die block 112.
[58]
That is, the third die block 121, if that is opposite the lower die 110 is divided into two areas. That is, is relatively the second inclined portion (121b) extending from the second flat portion (121a) and a second flat portion (121a) which is located close to the upper discharge port (110A) of said third die blocks (121) It includes.
[59]
It said second flat portion (121a) extends in a direction parallel with the surface (XZ plane), the second inclined portion (121b) forms an such a second flat portion (121a) and the angle of approximately 30 degrees to 60 degrees angle to the bottom it has an inclined shape.
[60]
As such, the third die block 121, and if provided with a sloping inclined surface for the flat surface and the surface parallel with the ground, the upper surface of the lower die 110 having an upper surface of the shape corresponding to this, that is, the second die the top surface and can be matched in the block 112.
[61]
In addition, the third die block 121, a fourth die block 122, second slurry containing part (G2) formed as a groove shape having a predetermined depth on the opposite side with. Although not shown in the drawings, this second slurry containing part (G2) is coupled to the active material slurry supply chamber provided outside is supplied to receive a second active material slurry continuously. Although not shown, the second slurry containing part (G2) can include a slurry supply port in communication with the slurry feed chamber.
[62]
When in accordance with a second active material slurry supplied by the active material slurry supply chamber a second slurry containing part (G2) in a second active material slurry is full, the second active material slurry is a third die block (121) and a fourth die block ( through an upper discharge opening (120A) formed by the combination of the 122) it is discharged to the outside.
[63]
The fourth die block 122, a third coupled and are arranged in the upper third die block 121, die block 121, so that the second slurry containing part upper discharge port (120A) in communication with (G2) a is formed.
[64]
On the other hand, the third die block (121) and a fourth die block 122, may be made of a metal material, this third die block (121) and a fourth die block 122 with each other by bolting bond It may be fastened.
[65]
[66]
The second spacer 123, the third and form a gap between the die block 121 and the fourth is sandwiched between the die block 122, a third die block (121) and a fourth die block 122, This forms an area with a second active material slurry was supplied from the second slurry containing part (G1) can be discharged.
[67]
The second spacer 123, and a second opening (123a) formed on its one side, so that the second spacer 123, a third die block (121) and a fourth die block 122, respectively is the only via the border area remaining region except for the one side of the facing surface. In addition, the third die block (121) and a fourth die block 122, second spaced apart from each other in the region where the formed second opening (123a), second slurry containing part (G2) and in communication with the space, that is, the upper discharge port to form a (120A).
[68]
The first so the second spacer 123, with the exception of the area where the upper discharge opening (120A) formed on a third die block (121) and a fourth die block 122 gap to not leak the second active material slurry between since functioning as a gasket, preferably made of a material having elasticity so as to ensure sealing performance.
[69]
[70]
On the other hand, in the present invention, it may be in the first active material slurry and a second active material slurry was the same active material slurry composition, a component that may be a different active material slurry. Identity the presence of the first active material slurry and a second active material slurry is, in forming the two active material layers on the current collector, that to each other formed on the different layers of the same active material having the same composition with each other, or different configurations a different electrode active material having the components in one another will be determined according to that to be formed in different layers.
[71]
[72]
Next, with reference to Figure 5, a description will be made of a relative movement between the lower die and the upper die.
[73]
Figure 5 is a method, the lower die 110 and upper die 120, the position difference along the horizontal direction between a pair of the discharge ports by the relative movement between generating the slot die coater 100 in accordance with one embodiment of the present invention a diagram showing a case.
[74]
If with the 3 and 4 who had previously reference to Figure 5, a slot die coater 100 in accordance with one embodiment of the invention, the two discharge ports (110A, 120A) to bring the current collector with two active material throughout the as to ensure that the layer is formed, these two discharge ports (110A, 120A) are spaced from each other along the horizontal direction to facilitate the coating of the electrode active material slurry can be arranged before and after.
[75]
That is, as illustrated in Figure 5, the use of separate apparatus for adjusting the shape of the slot die coater 100, or an operator by hand creating a relative movement of the lower die 110 and upper die 120 It can be.
[76]
For example, by moving by the lower die 110 to put not move exactly as the discharge direction and the predetermined distance (D) to the opposite rear side of the active material slurry along the horizontal direction of the upper die 120, lower outlet opening ( 110A) and to form a level difference between the upper discharge port (120A).
[77]
The width of the step (D) thus formed can be determined in the range of approximately several micrometers to a few millimeters, which can be determined according to the thickness of the electrode active material layer formed on the current collector.
[78]
That is, the current collector The full phase thickness of the electrode active material layer be formed on the thick width (D) of the trench is becomes the figure is increased, whereby the electrode formed by the first electrode active material slurry is discharged through the lower discharge port (110A) active material the operation of forming the another electrode active material layer on the floor can be smoothly performed.
[79]
Also, this way, the lower discharge port (110A) and an upper discharge port (110B) is in accordance with the disposed in a spaced apart position along the horizontal direction, the electrode active material slurry is discharged from the upper discharge port (110B) blocked by the surface forming the step eliminates the danger of flowing into the lower discharge port (110A) may proceed more seamless multi-layer active material coating process.
[80]
On the other hand, given from 3 to to Figure 5, see with the lower die 110. The top and bottom, respectively, the flat portion (112a, 121a) and the flat portion (112a, 121a) parallel to the plane of the upper die 120 of the inclined at an angle and having an extended inclined portion (112b, 121b), it has a shape, which are mutually matched.
[81]
Thus, the slot die coater 100 in accordance with one embodiment of the present invention is illustrated in the FIG. 3 in a state in which an upper discharge port (120A) located in the further rear than the lower discharge port (110A) as shown in Fig. 5 described as can be in a case where the form converted to a state which is located side by side above the discharge port (120A) and a lower discharge port (110A), it prevents the upper portion discharge port (120A) moves further forwardly than the lower discharge port (110A).
[82]
In other words, the lower discharge port of the first inclined portion (112b) and a second inclined portion (121b) has an upper discharge port (120A) in the matched state lower die 110 and upper die 120 acts as a stopper to each other ( 110A) it is capable of preventing a phenomenon in which more than advancing forward.
[83]
A first active material slurry to be a slot die coater 100 in accordance with one embodiment of the invention, as illustrated in Figure 8, the discharge from the lower die 110, the lower discharge port (110A) formed in as described above (A1 ) and a top die 120, a second active material slurry (A2) to be discharged from the upper discharge opening (120A) formed in a coating such that constitute two layers on an electrode collector in sequence (E).
[84]
Further, take the form of a slot die coater 100 has a lower die 110 and an upper discharge port (120A) by a relative sliding movement of the upper die 120 is relatively more locations to the rear than the bottom discharge port (110A) can. The slot die coater 100, it is possible to be the width of a step is formed between each discharge port (120A, 120B) controlled in consideration of the thickness of the second active material slurry (A2) is applied.
[85]
[86]
Next, it will be with reference to Figures 6 and 7, describes a slot die coater 200 in accordance with another embodiment of the present invention.
[87]
6 is a vertical cross-sectional view showing a slot die coater 200 in accordance with another embodiment of the invention, Figure 7, the slots each die block forming the die coater 200 are mutually disassembled state shown in FIG. 6 a cross-sectional view showing the.
[88]
6 and 7, a slot die coater 200 according to another embodiment of the invention the die top having a lower die 210 and an upper discharge port (220A) having a lower discharge port (210A) ( 220) a.
[89]
The lower die 210 includes a first die block 211, second, and includes a die block 212 and the first spacer (not shown), the first die block 211 is a first slurry containing part (G3) and a.
[90]
The upper die 220, a third die block (221), the fourth, and includes a die block 222 and a second spacer (not shown), a third die block 221, second slurry containing section (G4 ) and a.
[91]
Slot die coater 200 in accordance with another embodiment of the present invention, as compared to a slot die coater 100 in accordance with one embodiment of the present invention described above, the second die block 212 and the third die blocks (221 ) there is a difference only in the shape of the part, and other components are substantially the same as the components of the slot die coater 100 in accordance with one embodiment of the present invention. Thus, in the following description of a slot die coater 200 in accordance with another embodiment of the invention, the description is the same as in the previous embodiments will be omitted, there will be focuses only on the areas in which there are differences.
[92]
It said second die block 212, a top surface that is opposite the upper die 220 is divided into two areas. That is, the upper surface of said second die block 212 has a first flat portion (212b) extending from the first inclined portion (212a) and the first inclined portion (212a) which is located close to the relatively lower discharge port (210A) It includes.
[93]
The first flat portion (212b), the ground and extends in a direction parallel to the (XZ plane), the first inclined portion (212a) forms an such a first flat portion (212b) and the angle of approximately 30 degrees to 60 degrees to the upper portion obliquely it has a beveled form.
[94]
Thus, the second die block 212, and its upper surface can be matched with the upper die 220 with the lower surface of the shape which is provided with a sloping inclined surface, this corresponds to the flat surface and the surface parallel to the ground.
[95]
[96]
The third die block 221, a block which is located in the upper portion of the lower die 210, described earlier, that if this has a shape corresponding to the upper surface so as to be matched with the second die block 212.
[97]
That is, the third die block 221, if that is opposite the lower die 210 is divided into two areas. That is, is relatively to the second flat portion (221b) extending from the second inclined portion (221a) and a second inclined portion (221a) which is located close to the upper discharge port (220A) of said third die blocks (221) It includes.
[98]
Said second flat portion (221b) is ground and extends in a direction parallel to the (XZ plane), the second inclined portion (221a) forms an such a second flat portion (221b) and the angle of approximately 30 degrees to 60 degrees angle to the upper it has an inclined shape.
[99]
As such, the third die block 221, and if provided with a sloping inclined surface for the flat surface and the surface parallel with the ground, the upper surface of the lower die 210 having an upper surface of the shape corresponding to this, that is, the second the top surface and can be matched in the die block 212.
[100]
The first inclined portion (212a) and a second inclined portion (221a) is to act as a stopper to each other the lower die 210 and upper die the lower discharge port (210A), an upper discharge port (220A) in the (220) a matching condition It can be prevented from further forward than the front.
[101]
[102]
Further, as a slot die coater 100 and 200 according to the present invention, and the respective bottom consisting of two die blocks die and the upper die having an independently discharge port with each other, the lower die and upper die is along the horizontal direction as described above even if the relative movement, the shape of the lower discharge port and the top ejection outlet, the having a structure which does not affect.
[103]
Thus, the slot die coater in accordance with the present invention, the current collector in a case, depending on the overall thickness of the electrode active material layer coated on the change is necessary for the relative position between the lower ejection opening and an upper discharge port, the lower die and / or sliding movement of the upper die to be simply adjusted by, and can be disassembled and re is no need to greatly improved fairness assemble each die block as in the prior art of a slot die coater.
[104]
[105]
The present invention in the above Although the detailed description and specific examples, the invention is not limited by this is described below with the teachings of the present invention by one of ordinary skill in the art available are various changes and modifications within the equivalent scope of the claims. FIG.

Claims
[Claim 1]
A slot die coater coating the electrode active material slurry to the entire current collector, the lower die having a lower discharge opening; And an upper die disposed on an upper portion of the lower die having an upper discharge ports; When in the included and the upper surface and the upper die of the lower die are tangent to each other is at least in part so as to form a sliding surface, wherein the upper die and lower die which one side is sliding along the sliding surface relative movement in the horizontal direction It can be a slot die coater, which is installed to.
[Claim 2]
The method of claim 1 wherein the upper discharge opening is a slot die coater, characterized in that located in the rear by a predetermined distance than the lower ejection opening.
[Claim 3]
According to claim 1, wherein the slot die coater, characterized in that the discharge direction of the lower discharge opening and the upper discharge opening is an angle of 30 degrees to 60 degrees to.
[Claim 4]
The method of claim 1 wherein the lower die includes a first die block and a second die block, and is interposed between the first die block and a second die block said first die block which is located in the upper portion of the first die block and the second between the die block includes a first spacer to be formed with the bottom discharge opening, the upper die, the third die block, a fourth die block and the third die disposed on an upper portion of the third die block block and the fourth block is interposed between the die slot, characterized in that it comprises a second spacer such that said upper discharge opening formed between the third die and a fourth die block block die coater.
[Claim 5]
According to claim 4, in that it comprises said first die block claim comprising a receiving first slurry for receiving a first electrode active material slurry, and the third die block receiving the second slurry to receive a second electrode active material slurry portion slot die coater according to claim.
[Claim 6]
The method of claim 5, wherein the first spacer is provided with a first opening formed on its one side, and the second spacer comprises a second opening formed on its one side, wherein the first openings receiving the first slurry portion and is in communication, and the second opening portion and the second slurry-carrying portion and a slot die coater, characterized in that the communication path.
[Claim 7]
The method of claim 4 wherein said second die block has a first planar portion and a first angled comprising a, and the third die block and extending at a predetermined angle from the first portion first flat is, a second flat portion, and the the slot die coater comprising: a second inclined portion extending at a predetermined angle from the second flat portion.
[Claim 8]
The method of claim 7, wherein the first flat section and second flat section characterized in that in contact with each other and face each other and extend in the direction parallel to the contact, the first angled portion and the second ramp facing each other extend in another direction parallel to slot die coater to.
[Claim 9]
Of claim 7, wherein the first flat portion of the first open-side end portion and said second flat portion and the second opening-side end portion, and a given slot die coater, characterized in that the step difference is formed between in.