JP2005216722A - Electrode plate for nonaqueous electrolyte secondary battery and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrode plate for a nonaqueous electrolyte secondary battery capable of increasing manufacturing speed, preventing the generation of wrinkles or break in a boundary between a painting part and a non-painting part of an active material layer of the electrode plate formed with a roll press in a manufacturing process, and enhancing forming accuracy of the active material layer. <P>SOLUTION: An easily separable tape having a pressure sensitive adhesive layer is stuck on a substrate of a current collector made of a long metallic foil in the length direction, and the active material layer is formed on the current collector other than the easily separable tape by stripe painting. The easily separable tape and the active material layer on the current collector are pressed, and then the easily separable tape is removed to form the non-painting part. The pressure sensitive adhesive layer is preferably an active energy ray curing pressure sensitive adhesive layer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an electrode plate for a non-aqueous electrolyte secondary battery and a method for producing the same, and more specifically, an electrode excellent in shape accuracy for a non-aqueous electrolyte secondary battery having a non-coated portion on a current collector. The present invention relates to a manufacturing method for efficiently manufacturing a plate.

In recent years, development of large batteries for driving small electronic devices and for electric vehicles and nighttime power storage has been actively carried out in recent years, with higher capacity, higher energy density, and economical rechargeability. The demand for rechargeable batteries is increasing. As these typical secondary batteries, lead storage batteries, alkaline storage batteries, lithium secondary batteries (non-aqueous electrolyte secondary batteries) and the like are known.
The electrode plates of these secondary batteries have a configuration in which an active material layer containing an active material and a binder is formed on one side or both sides of a metal current collector. The electrode plate is provided with a non-coated portion for connecting a current collecting tab to a part of the electrode plate so as to expose the metal current collector surface.

  In recent years, with the expansion of applications of non-aqueous electrolyte secondary batteries, the need to efficiently manufacture high-performance non-aqueous electrolyte secondary batteries has increased. As a method of providing the non-coated portion on the electrode plate, a method of providing uncoated portions on both sides of the long current collector as shown in FIG. There is a method of forming a coated portion. The former can provide an uncoated part by coating means, such as a gravure coat method, a die coat method, and a comma coat method. The latter can provide a non-coating part by the intermittent application system which is described in patent document 1, for example.

  However, in the intermittent coating method, disturbance between the coating layer and the non-coated portion and nonuniform thickness of the layer are likely to occur (see Patent Document 2). In addition, there is a mechanism limit for increasing the coating speed. On the other hand, according to the former method in which an uncoated portion is provided in the longitudinal direction of the long current collector, coating can be continuously performed in the longitudinal direction. It is easy to increase the work speed.

  However, a high-performance nonaqueous electrolyte secondary battery is manufactured by roll pressing the electrode plate to increase the active material density, and then connecting a current collecting tab to the non-coated part. In such a method in which the non-coated part is formed continuously in the longitudinal direction, distortion is likely to occur at this boundary due to the difference in force applied to the coated part and the non-coated part during compression by a roll press. Since this distortion is not released regularly like the work, there is a problem that the current collector is likely to be wrinkled or cracked. In order to prevent this, it is only necessary to reduce the compression ratio by the roll press. However, since the active material density cannot be increased, the amount of active material in a certain volume cannot be increased, and the battery capacity cannot be increased.

  In order to solve this problem, there has been disclosed an idea of preventing the occurrence of wrinkles and cracks by annealing the non-coated portion of aluminum to facilitate stretching (see Patent Document 3). Also, mask the non-coated part with adhesive tape, apply the active material layer to the entire surface including the top of the tape, peel off the active material layer together with the masking tape from the current collector after roll pressing, and then apply the non-coated part. Has been disclosed (see Patent Document 4). However, in a method in which an adhesive tape having a thickness of several tens of μm is used, a gravure coater or a die coater is used on the adhesive tape, and an active material layer of several tens of μm is solid-coated, immediately after coating (see FIG. Even in 1) and after drying (FIG. 2), the tape part rises by the thickness of the tape, which also causes wrinkles during roll pressing. Further, in the experiments of the present inventors, the clearance at the time of coating such as a comma coater and a knife coater is constant, and the coating plane immediately after coating is applied to substantially the same plane as shown in FIG. Unlike the active material layer, the pressure-sensitive adhesive tape portion does not reduce the film thickness due to the drying process. As a result, swell occurs as shown in FIG. 4, and wrinkles are generated during pressing.

Japanese Patent Laid-Open No. 1-184069 JP-A-10-144303 JP 2000-251942 A JP 2000-133250 A

  In view of the above-described conventional problems, the present invention can increase the production rate, and even if the electrode plate is compressed by a roll press, the boundary between the coated part and the non-coated part does not cause wrinkles or cracks. The manufacturing method of the electrode plate for nonaqueous electrolyte secondary batteries excellent in the shape accuracy of a part and a non-coating part is provided, and the electrode plate for nonaqueous electrolyte secondary batteries manufactured by the manufacturing method is provided The purpose is that.

The present invention
(1) A process of attaching an easily peelable tape having an adhesive layer on a substrate in a longitudinal direction on a current collector made of a long metal foil,
(2) A step of forming an active material layer containing an active material and a binder by stripe coating on a current collector excluding an easily peelable tape portion;
(3) a step of pressing the current collector and the easily peelable tape formed in a stripe shape on the current collector and the active material layer;
(4) An electrode plate for a non-aqueous electrolyte secondary battery having a step of peeling the easily peelable tape in the longitudinal direction in this order, and forming a striped non-coated portion on the current collector A manufacturing method is provided.
In the present invention, the pressure-sensitive adhesive layer of the easily peelable tape contains an active energy ray-curable compound, and the non-aqueous electrolyte secondary irradiates the pressure-sensitive adhesive layer with active energy rays immediately before the tape peeling step. A method for producing an electrode plate for a battery is provided.
The present invention also provides an electrode plate for a nonaqueous electrolyte secondary battery manufactured by the above manufacturing method.

According to the present invention, since the thickness of the easily peelable tape can be adjusted to be equal to the thickness of the active material layer, wrinkles and cracks are formed at the boundary between the coated part and the non-coated part when roll pressing is performed. An electrode plate that does not occur can be obtained. Furthermore, since it is not an intermittent coating method but a continuous coating method in the longitudinal direction, the coating film thickness is uniform and the productivity is high. In addition, the masking effect of the easily peelable tape makes the boundary between the non-coated part and the coated part clear, and the shape accuracy of the active material layer is also excellent.
Furthermore, by including the active energy ray-curable composition in the pressure-sensitive adhesive layer of the easily peelable tape, by irradiating the pressure-sensitive adhesive layer with the active energy ray, the adhesive strength can be further reduced and the peel strength can be reduced. Can do. For this reason, before irradiation with active energy rays, it maintains a relatively strong adhesive strength compared to conventional easily peelable tapes and adhesive tapes, and reduces the occurrence of defects due to delamination (peeling) during roll pressing and coating. In this case, it is possible to increase the peeling speed by reducing the adhesive strength by irradiating active energy rays at the time of peeling and weakening the peeling force to almost zero. Therefore, the production speed can be increased and the productivity can be increased.

  According to the present invention, since the continuous coating method is used instead of the intermittent coating method, the coating film thickness is uniform and high productivity can be obtained. In addition, the electrode plate manufactured by this method does not cause wrinkles or cracks at the boundary between the coated part and the non-coated part. The boundary of the part is clear and the shape accuracy of the active material layer is excellent. Furthermore, by including an active energy ray-curable composition in the adhesive layer of easy-release tapes, production of defects due to delamination (peeling) during roll pressing and coating is reduced and the peeling speed is increased. Can increase the sex.

Next, the present invention will be described in more detail with reference to preferred embodiments.
Examples of the current collector made of the metal foil used in the present invention include stainless steel, nickel, copper, titanium, and aluminum. Aluminum or aluminum alloy is preferable for the positive electrode plate, and copper or copper alloy for the negative electrode plate. Is preferred.

The active material layer applied by the present invention is formed by applying and drying at least a coating liquid composed of an active material and a binder, and can contain a conductive material, a solvent, and the like. As the positive electrode active material used in the present invention, for example, lithium oxides such as LiCoO ₂ , LiNiO ₂ and LiMn ₂ O ₄ are suitable. On the other hand, as the negative electrode active material, carbonaceous materials such as natural graphite, artificial graphite, graphitizable carbon, and non-graphitizable carbon are suitable. These active materials are preferably uniformly dispersed in the active material layer formed on the current collector, and as a binder for dispersing them, fluorine resins such as polyvinylidene fluoride, rubber-based materials Alternatively, a silicone / acrylic copolymer or the like is used.

As the conductive material used in the present invention, graphites such as natural graphite and artificial graphite, carbon blacks such as acetylene black and ketjen black, conductive fibers, metal powders, conductive metal oxides and the like are used alone or in combination. Can be used.
Moreover, as a solvent, what is conventionally used, such as toluene, methyl ethyl ketone, n-methyl-pyrrolidone, can be used suitably.
The easily peelable tape used in the present invention is an adhesive tape that can be peeled off without damaging the current collector with a predetermined peeling force after being applied to the current collector and subjected to a compression process by a roll press, It is composed of at least a base material and an adhesive layer.

Examples of the base material of the easily peelable tape include olefin films such as polyethylene, polypropylene and EVA, polyethylene terephthalate films, and multilayered products thereof, but are not limited thereto. Among these film substrates, a biaxially stretched polyester film is preferable because of its excellent heat resistance and strength characteristics. Although there is no restriction | limiting in particular as thickness of a polyester film, 12 micrometers or more and 75 micrometers or less are preferable. The total thickness of the easily peelable tape is not particularly limited, but it is desirable that the thickness does not exceed the thickness of the active material layer after roll pressing, and the optimum thickness is within a range that does not adversely affect production and quality. Can be selected.
In order not to generate wrinkles or cracks during roll pressing, it is preferable that the easily peelable tape is close to the thickness of the active material layer and does not exceed the thickness of the active material layer.

Examples of the adhesive of the easily peelable tape include a rubber-based adhesive, an acrylic-based adhesive, a urethane-based adhesive, and a silicon-based adhesive, but are not particularly limited. The 180 degree peel strength for aluminum is preferably 0.1 gf / cm or more and 100 gf / cm or less, and more preferably 10 gf / cm or less when measured at a peel rate of 300 mm / min. If it is less than 0.1 gf / cm, the coating liquid is likely to soak under the easily peelable tape when the active material layer is formed, and delamination occurs in the process until peeling, which is likely to cause wrinkles during roll press. . On the other hand, if it is greater than 100 gf / cm, the current collector tends to be damaged when peeling, and discontinuous peeling is likely to occur when high-speed peeling is performed. Furthermore, it tends to cause a tape break.
The adhesive layer of the easily peelable tape used in the present invention is an active energy ray curable adhesive containing an active energy ray curable compound, and the easily peelable tape is an active energy ray curable easily peelable tape. It is preferable that In such an easily peelable tape, the active energy ray-curable compound is cured and the adhesive force is reduced by irradiation of the active energy ray to the pressure-sensitive adhesive layer, so that the peel force can be further reduced in advance.
As active energy rays, particle beams such as electron beams and electromagnetic waves such as X-rays and ultraviolet rays can be used, but ultraviolet rays are preferable in terms of handling and cost. When ultraviolet rays are used as the active energy ray, an ultraviolet curable compound is used as the active energy ray curable compound to be contained in the adhesive to form an ultraviolet curable adhesive, and the easily peelable tape is an ultraviolet curable easily peelable tape. It can be.

  The active energy ray-curable pressure-sensitive adhesive is constituted by blending an active energy ray-curable compound with a base pressure-sensitive adhesive component. Conventionally known adhesives can be widely used as the base adhesive, and examples thereof include rubber adhesives such as natural rubber and various synthetic rubbers, and acrylic adhesives. In these, an acrylic adhesive is preferable.

  The acrylic pressure-sensitive adhesive is mainly composed of (meth) acrylic acid alkyl ester having an alkyl group having 1 to 12 carbon atoms, and has a carboxyl group, hydroxyl group, epoxy group, amino group, isocyanate group, etc. for crosslinking. As a base polymer, a monomer obtained by copolymerizing a monomer having a functional group of any of the above, a monomer copolymerizable with other (meth) acrylic acid alkyl ester as required, and usually a polyisocyanate compound, A crosslinking agent such as an alkyl etherified melamine compound, an epoxy compound, or a silane coupling agent is added and used. Furthermore, the base polymer used in the present invention may have a carbon-carbon double bond that polymerizes in the molecule upon irradiation with radiation.

Next, active energy ray-curable compounds such as ultraviolet rays blended in the base adhesive component include, for example, hexanediol di (meth) acrylate, (poly) ethylene glycol di (meth) acrylate, and (poly) propylene. Glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, pentaerythritol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, In addition, an epoxy acrylate, a polyester acrylate, a urethane acrylate, a maleimide derivative, etc. can be mentioned, These 1 or more types can be used together.
These active energy ray-curable compounds generally have a greater decrease in peel strength after irradiation with active energy rays as the blending amount increases. However, the pressure-sensitive adhesive component that serves as the base in consideration of the balance between the peel strength before and after irradiation The type and amount can be appropriately selected and used together with the type and amount.

Moreover, when using an ultraviolet-ray as an active energy ray, a photoinitiator and a sensitizer can be used. Examples of photoinitiators include acetophenone, benzophenone, benzyl, benzoin, Michler ketone, benzoin isobutyl ether, benzyl dimethyl ketal, 1-hydroxycyclohexyl phenyl ketone, 2-chlorothioxanthone, 2-methyl-1 [4- (methylthio) Phenyl] -2-morpholinopropan-1-one, benzyl dimethyl ketal, etc. may be mentioned, and one of these may be used alone or in combination of two or more.
Moreover, you may use together amine compounds, such as a triethylamine, n-butylamine, and di-n-butylamine, as a sensitizer as needed.

  Furthermore, the active energy ray-curable pressure-sensitive adhesive used in the present invention includes, in addition to the above-mentioned pressure-sensitive adhesive component as a base, an essential component of a radiation-curable compound, and a photoinitiator, as necessary, a normal pressure-sensitive adhesive. A tackifier resin, a tackifier, a surfactant, and other modifiers used in the agent can be contained.

  When using an active energy ray-curable pressure-sensitive adhesive, it is preferable to use a material that is made of a material having good transmissivity of active energy rays as a substrate of an easily peelable tape in order to perform efficient irradiation. When ultraviolet rays are used as the active energy rays, the substrate is preferably one having good ultraviolet transmittance, and a film transparent to ultraviolet rays containing no ultraviolet absorber or pigment is preferred.

As a method of coating the active material layer of the present invention in a stripe shape, a known method such as a gravure coater, a roll coater, a knife coater, a comma coater, or a die coater, for example, JP-A-7-275773 and JP-A-2002. It can be applied by the method described in JP-A No. 159899, and an optimum one may be selected in consideration of the viscosity of the paint.
Further, it is not always necessary to strictly adjust so that the active material applied on the tape does not leak during coating, and it may be applied to the tape as long as the effect of the present invention is not impaired.

Below, the manufacturing method of this invention is demonstrated in detail based on drawing.
First, an easily peelable tape is pasted on 1 on a current collector made of a long metal foil in the longitudinal direction. As a method of sticking, for example, it is possible to stick several lines continuously and simultaneously on a long metal foil that runs while winding an easily peelable tape. (FIG. 5).
Thus, on the current collector partially covered with the easy-release tape, the longitudinal stripe-shaped region excluding the both ends in the longitudinal direction and the sticking part of the easy-release tape is applied by a known stripe coating method. An active material layer is formed (FIG. 6).

  The active metal layer is compressed by performing roll press on the entire surface of the long metal foil as a current collector, the active material layer thereon, and the easily peelable tape (FIG. 8). The thickness of the easily peelable tape on the current collector is preferably such that it forms substantially the same plane as the adjacent active material layer during roll pressing. When the film thickness of the easily peelable tape is thicker than the film thickness of the active material layer after the roll press, the adjacent active material layer, in particular, the vicinity of the easily peelable tape is not sufficiently compressed. On the other hand, if the film of the easily peelable tape is too thin, wrinkles and cracks are likely to occur at the boundary between the active material layer and the easily peelable tape during roll pressing.

The easily peelable tape on the current collector is peeled off (FIG. 10). Thus, the long metal foil formed with the uncoated portion on the current collector can be appropriately slit in the longitudinal direction before winding, and can be used as a long non-aqueous electrolyte secondary battery electrode plate. The metal foil for an electrode to be used is wound up in a roll shape, cut to an optimum length as appropriate, and used as an electrode plate for a nonaqueous electrolyte secondary battery.
Further, before performing the roll press in the above process, the uncoated part at both ends of the long metal foil as a current collector and the coating defect existing in the longitudinal direction adjacent to the uncoated part. The stable portion may be removed by a slit (FIG. 7).
Furthermore, in a more preferable form of the present invention, it is preferable to irradiate the adhesive layer with active energy rays through the tape before the remaining easily peelable tape is peeled off (FIG. 9).

The following examples illustrate the invention in more detail.
In addition, although an Example demonstrates the positive electrode plate for nonaqueous electrolyte secondary batteries to an example, this invention is not limited to this. In the text, “part” represents a part by mass.

(Example 1)
First, a positive electrode coating solution containing a positive electrode active material and a binder used in this example was prepared by the following method. As a positive electrode active material, 9 parts of acetylene black and 3 parts of polyvinylidene fluoride were mixed with 100 parts of LiMn ₂ O ₄ powder having a particle size distribution of 1 to 50 μm and an average particle size of 10 μm, and N-methyl-2-pyrrolidone. It was made to suspend in the solution and the paste-form positive electrode coating liquid was obtained. For the current collector, an aluminum foil having a width of 300 mm and a thickness of 20 μm was used.
To this current collector, an easily peelable tape having a width of 20 mm was previously attached to one side of the current collector in the longitudinal direction. As this easily peelable tape, a tape made of a biaxially stretched polyethylene terephthalate having a thickness of 25 μm and an acrylic pressure-sensitive adhesive layer having a thickness of 9 μm was used. The 180 degree peel strength of this easily peelable tape with respect to aluminum was 4.1 g / cm when measured at a peel rate of 300 mm / min.

  The current collector with this easy-release tape attached in advance on one side uses the positive electrode coating solution obtained above, and uses a comma coater on this current collector to mask a part of the comma coater head. Then, stripe coating was performed. The active material layer thickness after drying was 100 μm. By repeating the same process as described above on the opposite surface of the current collector 1 having an active material layer formed on one surface, the thickness of the active material layers on both surfaces after drying was set to 200 μm in total. As shown in FIG. 7, the obtained electrode plate was subjected to roll pressing at a linear pressure of 800 kg / cm after slitting and removing the uncoated portion and the coating thickness unstable region at the coated end portion at both end portions. Subsequently, the easily peelable tape was continuously peeled on both sides simultaneously to obtain the positive electrode plate of Example 1.

(Example 2)
In Example 1, an easily peelable tape having a 25 μm thick base material made of biaxially stretched polyethylene terephthalate and a 15 μm thick UV curable acrylic pressure-sensitive adhesive layer was used. The 180 ° peel strength of this adhesive tape with respect to aluminum was 130 g / cm before UV irradiation when measured at a peel rate of 300 mm / min. Moreover, 180 degree peeling strength with respect to aluminum after performing UV irradiation of 500 mJ / cm <2> using the high pressure mercury lamp from the polyester surface side of a base material is 1 g / cm or less when measured with the peeling rate of 300 mm / min. Met.

The used ultraviolet curable adhesive was produced by the following formulation.
Acrylic adhesive component AS-409 60 parts (one company oil)
Adhesive curing agent B-45 0.9 parts (one company oil)
Radiation-curing component Unidic 17-813 40 parts (DIC)
Photoinitiator Irgacure 184 2 parts
(Ciba Specialty Chemicals)
Stripe coating was performed on both sides in the same manner as in Example 1 except that the above adhesive tape was used.
The obtained electrode plate was subjected to roll press at a linear pressure of 800 kg / cm after slitting and removing the uncoated part and the film thickness unstable region of the coated end part at both ends. Subsequently, each 500 mJ / cm < ² > of UV irradiation was performed from both sides of the easily peelable tape by a high pressure mercury lamp, and then the tape was continuously peeled off simultaneously to obtain a positive electrode plate of Example 2.

(Comparative Example 1)
In Example 1, the coating by the comma coater was applied to the entire surface of the tape instead of the stripe. It became 120 micrometers in the area | region (A total of the thickness of an easily peelable tape, and the active material layer thickness on an easily peelable tape) in which the easily peelable tape was stuck in the area | region which has not stuck the easily peelable tape. Next, when the opposite surface was continuously coated and dried in the same manner as described above, the thickness of the active material layer on both sides after drying was 200 μm in the region where the easy-release tape was not applied, and the easy-release tape was applied. The total area (total thickness of the easily peelable tape and the active material layer thickness on the easily peelable tape) was 240 μm.
The obtained electrode plate was subjected to roll pressing at a linear pressure of 800 kg / cm after slitting and removing the film thickness instability regions of the uncoated and coated ends at both ends, and then easy peeling The tape was continuously peeled on both sides at the same time to obtain a positive electrode plate of Comparative Example 1.

(Comparative Example 2)
In Example 2, the coating with a comma coater was applied all over the tape, not on the stripes. Other than that, double-sided coating was performed in the same manner as in Example 2, and the obtained electrode plate was formed by slitting and removing the uncoated portions and the coating thickness unstable regions at the coated end portions at both end portions. A roll press was performed at a linear pressure of 800 kg / cm. Subsequently, each 500 mJ / cm < ² > of UV irradiation was performed from both sides of the easily peelable tape by a high pressure mercury lamp, and then the tape was continuously peeled off simultaneously to obtain a positive electrode plate of Comparative Example 2.

(Comparative Example 3)
Using the same current collector 1 and positive electrode coating solution as in Example 1, the current collector 1 was coated and dried in a stripe shape with a die coater. The stripe coating shape at that time was a shape in which the easy-peelable tape 2 was not applied and that portion was an uncoated portion. Subsequently, when the opposite surface was continuously coated and dried in the same manner as described above, the thickness of the active material layer on both surfaces after drying was 200 μm. The obtained electrode plate was roll-pressed at a linear pressure of 800 kg / cm to obtain a positive electrode plate for Comparative Example 3.

  About the above electrode plate, the shape accuracy of the active material layer in the boundary part of a non-coating part and a coating part, and the generation | occurrence | production state of a wrinkle and a crack were observed.

  As can be seen from the results in Table 1, by combining an easily peelable tape and stripe coating, there is no generation of wrinkles or cracks, the shape accuracy of the active material layer is good, and the nonaqueous electrolyte having excellent tape peelability is obtained. An electrode plate for a secondary battery was produced. In particular, when an active energy ray-curable pressure-sensitive adhesive is used as the pressure-sensitive adhesive, it can be seen that the peelability of the tape is very good. On the other hand, when either one of the easily peelable tape and the stripe coating is not applied, wrinkles and cracks are generated and the shape accuracy of the active material layer is deteriorated.

It is the figure which showed the state of the coating film just after coating by a conventional system (gravure coater, die coater, etc.) after masking tape attachment. It is the figure which showed the state of the coating film after the drying which performed coating by the conventional system (gravure coater, die coater, etc.) after masking tape attachment. It is the figure which showed the state of the coating film just after coating by a conventional system (Comma coater, knife coater, etc.) after masking tape attachment. It is the figure which showed the state of the coating film after the drying which performed coating by the conventional system (Comma coater, knife coater, etc.) after masking tape attachment. It is a figure which shows the example of the state after attaching an easily peelable tape in the manufacturing method of this invention. It is a figure which shows the example of the state after stripe coating in the manufacturing method of this invention. It is the figure which showed the coating unstable part in the case of removing a coating unstable part as an example of the manufacturing method of this invention. It is a figure which shows the example of the state after applying a roll press in the manufacturing method of this invention. It is the figure which showed the condition which irradiates an active energy ray to an active energy ray hardening adhesive layer as an example of the manufacturing method of this invention. It is a figure which shows the example of the state which peeled the easily peelable tape in the manufacturing method of this invention, and formed the uncoated part. It is a figure which shows the state which looked at the state which provided the uncoated part in the longitudinal direction from the upper part of the electrical power collector. It is a figure which shows the state which looked at the state which provided the uncoated part in the cross direction from the upper part of the electrical power collector.

Explanation of symbols

1 Current collector
2 Easily peelable tape 3 Active agent layer 4 Unstable part of coating (part removed by slit)

Claims (4)

(1) A process of attaching an easily peelable tape having an adhesive layer on a substrate in a longitudinal direction on a current collector made of a long metal foil,
(2) A step of forming an active material layer containing an active material and a binder by stripe coating on a current collector excluding an easily peelable tape portion;
(3) a step of pressing the current collector and the easily peelable tape formed in a stripe shape on the current collector and the active material layer;
(4) An electrode plate for a non-aqueous electrolyte secondary battery having a step of peeling the easily peelable tape in the longitudinal direction in this order, and forming a striped non-coated portion on the current collector Manufacturing method.   The non-adhesive layer according to claim 1, wherein the pressure-sensitive adhesive layer of the easily peelable tape contains an active energy ray-curable compound, and the active energy ray is irradiated to the pressure-sensitive adhesive layer immediately before the peeling step of the easily peelable tape. A method for producing an electrode plate for a water electrolyte secondary battery.   The said active energy ray is an ultraviolet-ray, The manufacturing method of the electrode plate for nonaqueous electrolyte secondary batteries of Claim 2 using an ultraviolet-ray permeable film as a base material of the said easily peelable tape. The electrode plate for nonaqueous electrolyte secondary batteries manufactured with the manufacturing method of any one of Claims 1-3.

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