JP2008027771A - Nonaqueous electrolyte battery tab lead material, method for fabrication thereof and nonaqueous electrolyte battery including the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery which improves the adhesiveness of a tab lead material and an insulating film adhered to the surface of the tab lead material to ensure its reliability. <P>SOLUTION: A tab lead material 13 is constituted by applying a primer including chitosan or its derivative onto a metal foil surface. In the nonaqueous electrolyte battery, an insulator film 14 is attached to a part of the surface of the tab lead material and the tab lead material is electrically connected to positive/negative terminal collector. An assembled electricity generation element is encapsulated in a jacket material container 12 and then a jacket material opening is sealed with a heat seal, etc. for battery fabrication. A nonaqueous battery having such a structure has a good adhesiveness at a tab terminal portion and a good liquid leakage resistance. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a tab lead material for a non-aqueous electrolyte battery, and more particularly to an improved tab lead material having improved adhesion to a polymer insulating film, a method for producing the same, and a non-aqueous electrolyte battery using the same.

  In recent years, in order to reduce the exhaust gas of an automobile, an automobile using a battery as a driving power source has been studied. This battery is required to have a large energy capacity, and as such a battery, a lithium secondary battery, a fuel cell, or the like is prominent.

  In a lithium secondary battery, a film-like positive electrode and a negative electrode are opposed to each other via a separator, and a nonaqueous electrolyte is interposed therebetween to transmit lithium ions to enable charging / discharging. These power generation elements are covered with a highly airtight exterior material, and electricity can be taken out from the negative electrode and the positive electrode by a tab lead material.

  In the electrolyte contained in the battery, a carbonate-based solvent is mainly used as a solvent for the electrolytic solution, but if such a solvent leaks outside from the exterior material, the battery does not stop functioning. Depending on the material, there is a risk of ignition, which is not preferable. Therefore, even in the severe usage form of the battery for automobiles, an improvement in sealing performance between the tab lead material of the battery and a member in contact with the battery is strongly demanded.

Furthermore, in a lithium nonaqueous electrolyte battery, a lithium salt containing a fluorine atom such as LiPF ₆ is used as an electrolyte dissolved in the organic solvent. By the way, when this fluorine-containing electrolyte such as LiPF ₆ comes into contact with water, it is chemically decomposed to generate HF. This HF is a highly corrosive substance, which erodes the metal such as aluminum constituting the tab lead material, lowers the adhesive force with the insulating film adhered to the surface, and causes peeling. It was.

  Although the above-mentioned problem is a problem in a film exterior type non-aqueous electrolyte battery, since it is used in an extremely severe situation in a vibration or temperature environment in an automobile application, there is a strong demand for a solution to the above problem. .

The present invention has been made to solve the above-mentioned problems in high energy capacity batteries for automobiles, etc., and improves the adhesion between the tab lead material and the insulating film adhered to the surface thereof, and is reliable. It aims at realizing a high non-aqueous electrolyte secondary battery.

  A first aspect of the present invention is a tab lead material for a nonaqueous electrolyte battery, wherein a primer layer containing chitosan or a derivative thereof is formed on the surface of a metal foil to a thickness of 200 nm to 5 μm.

In the first aspect of the present invention, the metal foil is a foil made of any one of aluminum, copper, and nickel, a laminate of two or more of these metals, and a laminate obtained by plating the surfaces of these metals. A foil or a foil obtained by plating the surface of these metal foils and then rolling them is preferable.
In addition, an insulating film can be bonded to a part of the surface of the tab lead material by heat sealing.

The second aspect of the present invention is a step of applying a primer made of chitosan or a derivative thereof to a metal foil;
Drying the metal foil coated with the primer to form a primer layer having a thickness of 200 nm to 5 μm;
A method for producing a tab lead material for a non-aqueous electrolyte battery with a film, comprising the step of adhering an insulating film to a dried primer-coated metal foil surface by heat sealing.

  In the second aspect of the present invention, in the primer applying step, the primer can be applied using an aqueous solution of chitosan or a derivative thereof.

According to a third aspect of the present invention, a positive electrode current collector provided with a positive electrode active material layer;
A negative electrode current collector provided with a negative electrode active material layer;
A separator sandwiched between the positive electrode current collector and the negative electrode current collector;
In a non-aqueous electrolyte battery in which a power generation element composed of a non-aqueous electrolyte impregnated in the separator is sealed in an exterior material,
A tab lead material in which a primer layer made of chitosan or a derivative thereof is formed to a thickness of 200 nm to 5 μm on the surface of a metal foil electrically connected to the positive and negative electrode current collector is used. It is a water electrolyte battery.

ADVANTAGE OF THE INVENTION According to this invention, the adhesiveness of a tab lead material and the insulating film adhere | attached on the surface improves, There is no peeling of a tab lead material and an insulating film, and a reliable secondary battery can be obtained.

[Nonaqueous electrolyte battery]
A non-aqueous electrolyte battery suitable for applying the present invention is shown in FIG. 1, FIG. 2, and FIG.
FIG. 1 is a partially broken perspective view of a nonaqueous electrolyte battery of the present invention. As shown in FIG. 1, this battery has a rectangular shape in which a positive electrode and a negative electrode are superposed inside a packaging material 12 via a separator, or the positive and negative electrodes are flattened after being wound through a separator. The electrode body unit 11 is housed, and the separator is impregnated with an electrolyte. The electrode body unit 11 is provided with a positive electrode current collector plate in contact with the positive electrode active material and a negative electrode current collector plate in contact with the negative electrode active material. The tab lead members 13a and 13b are electrically connected to each other, and project from the edge of the exterior body 12 to the outside to form a tab terminal leading out.

(Tab terminal)
As described above, the tab terminal composed of the tab lead material is a terminal that is electrically connected to the positive and negative electrode current collectors and takes out the generated electricity to the outside, and is led out from the sealing joint interface of the exterior material. It has a structure.

  2 is a view of the tab terminal portion indicated by a broken-line circle P in FIG. 1, and FIG. 3 is a cross-sectional view taken along line A-A ′ in FIG. As shown in FIGS. 2 and 3, the tab terminal portion is composed of a metal foil 13a constituting a tab lead material and a primer 13b formed on the surface of these metal foils 13a. Insulating films 14a and 14b made of an olefin polymer are stuck on the surface of the tab lead material 13, and when the outer material 12 is sealed by heat sealing, the outer surface of the tab terminal 13 is packaged. The material 12 is hermetically bonded, and the insulation between the tab lead material and the exterior material is ensured.

  This tab lead material is made of a metal foil such as aluminum, nickel, or copper, or a laminated structure of these metal foils. A primer layer is provided on the surface of the tab lead material in order to improve the adhesive strength when adhered to an insulating film. It is formed. The insulating films 14a and 14b are adhered to a part of the surface on which the primer layer is formed as described above.

  As the insulating film 14, an olefin polymer film is suitable, and any flexible film having insulation properties such as polyethylene and polypropylene can be used. However, in view of adhesiveness with the tab lead material, maleated polyethylene Alternatively, modified polyolefins such as maleated polypropylene are suitable.

A primer (primer) layer is formed on the surface of the tab lead material of the present invention in order to improve the adhesiveness with the insulating film adhered to the surface. As will be described in detail below, this primer is formed of a material comprising chitosan or a derivative thereof.
The thickness of the primer is preferably about 200 nm to 5 μm. When this thickness is less than 200 nm, the adhesiveness between the tab lead material and the insulating film on the surface cannot be improved, and the tab lead material is easily peeled off. On the other hand, if the film thickness exceeds 5 μm, if a force for peeling the tab lead material and the insulating film is applied, the primer itself causes cohesive failure and breaks, so that the adhesive strength decreases.

(Primer material)
Chitosan, which is the main component of this primer, deacetylates chicken, that is, β-poly-N-acetyl-D-glucosamine, which is a naturally-derived polymer substance obtained from crust, shrimp, insect shells or mushrooms. Which is a substance obtained from the above, is a polysaccharide containing an amino group having 2-amino-2-deoxy-D-glucose as a structural unit, forms various acids and salts, and exhibits a cationic property when dissolved in water It is. Since it is a compound having such a high reactivity, it can be bonded to either the hydrophilic material surface or the hydrophobic material surface.

  The chitosan or derivative thereof used in the present invention may be a polymer substance consisting only of this 2-amino-2-deoxy-D-glucose, or a copolymer in which this and other glucose are polymerized. There is no problem. Moreover, the derivative | guide_body which introduce | transduced another substituent into a part of functional group of the glucosamine which comprises this polymer may be sufficient. Specifically, those represented by the following chemical formula can be used.

Such chitosan is produced industrially, is supplied in various grades, and is commercially available.
In the present invention, chitosan and derivatives thereof having a degree of deacetylation of 80% or more are suitable. When the degree of deacetylation is lower than the above range, it becomes difficult to dissolve in water because it dissolves in water to form an aqueous solution, which is inappropriate for the present invention.
Moreover, 1000 or more and 2 million or less are preferable, and, as for a weight average molecular weight, it is more preferable that it is the range of 10,000-1 million. If the molecular weight is below this range, it is inappropriate for use in the present invention in terms of film formation of the adhesive layer, whereas if the molecular weight exceeds this range, the viscosity of the solution becomes too high. It is unsuitable for use in the present invention in terms of handling such as workability.
The chitosan derivatives are preferably chitosan, chitosan pyrrolidone carboxylate, hydroxypropyl chitosan, glycerylated chitosan, cationized chitosan, chitosan lactate, chitosan adipate, etc. It is preferable that the derivative further contains an organic compound having at least one carboxyl group in the molecule.

(Formation of primer layer)
In the present invention, the surface treatment of the tab lead material is performed using a primer containing chitosan or a derivative thereof, and the primer is preferably used as an aqueous solution of chitosan or a derivative thereof or an organic solvent solution. The concentration is preferably in the range of 0.1 to 20% by mass. When the concentration of chitosans is less than 0.1% by mass, the effect of improving adhesiveness is not improved, which is not practical. On the other hand, when the concentration of the chitosan exceeds the above range, the viscosity of the chitosan solution increases and handling becomes difficult.
In addition to the above chitosans, this primer includes an organic compound having at least one carboxyl group in the molecule, a trivalent chelate-forming metal compound, a rheological property improver (thixotropic improver), a preservative, an oxidation agent. Additives such as inhibitors can be used in combination. In particular, when a chelate-forming compound is used in combination, a chelate compound is formed together with the amino group of chitosan, and the film formability is improved.

  As long as the primer is used in a thickness within the above range, it does not impair the solderability even if it is formed on the surface of the tab lead material. Therefore, a simple soldering method can be adopted for electrical connection, which is advantageous. is there.

Hereinafter, the elements of the nonaqueous electrolyte battery of the present invention will be described more specifically in order.
(Positive electrode)
In the positive electrode of this embodiment, a positive electrode active material is bonded to the surface of a positive electrode current collector using a binder. As the binder in this embodiment, PVDF generally used as a binder, or a binder containing an organic compound having at least one carboxyl group in the molecule and chitosan or a derivative thereof is used. Can do.
As a positive electrode material of this Embodiment, generally well-known positive electrode material can be used as a nonaqueous electrolyte battery, without receiving a restriction | limiting in particular. Specifically, for example, mixed with the lithium-containing salt as the positive electrode active material _{(LiCoO 2, LiNiO 2, LiMnO} 2, LiFeO 2 or the like) carbon powder (graphite powder, coke powder etc.) as a conductive agent and a binder And what was formed by apply | coating and drying to the positive electrode collector surface like aluminum can be used.

(Negative electrode)
In the positive electrode of this embodiment, a negative electrode active material is bonded to the surface of a negative electrode current collector using a binder. In this embodiment, as the binder, a binder containing PVDF, SBR, chitosan or a derivative thereof and an organic compound having at least one carboxyl group in the molecule can be used.
As the negative electrode material of the present embodiment, a generally known negative electrode material as a nonaqueous electrolyte battery can be used without any particular limitation as in the case of the positive electrode described above. For example, the negative electrode plate may be formed by mixing graphite powder as a negative electrode active material with a binder, and applying and drying the negative electrode current collector surface such as copper.

(Separator)
The separator prevents the positive electrode and the negative electrode from coming into direct contact and short-circuits in the battery, and a known material can be used in the nonaqueous electrolyte battery. Specifically, it is made of a porous polymer film such as polyolefin or paper. As this porous polymer film, a film made of polyethylene, polypropylene, or the like is preferable because it is not affected by the electrolytic solution. The separator is formed in a size slightly larger than that of the positive electrode or the negative electrode, and its end portion extends outward from the end portion of the positive electrode or the negative electrode so that the two electrodes do not come into contact with each other.

  In this separator, an electrolyte is filled in a portion of the porous membrane sandwiched between the positive electrode and the negative electrode so that ion conduction is sufficiently performed between the positive electrode and the negative electrode.

(Electrolytes)
As the nonaqueous electrolyte of the present embodiment, a gel containing a nonaqueous solvent and a nonaqueous electrolyte substance is used.
Examples of the solvent for the nonaqueous electrolytic solution include organic solvents such as ethylene carbonate and propylene carbonate, or dimethyl carbonate, diethyl carbonate, 1,2-dimethoxyethane, 1,2-diethoxyethane, ethoxymethoxyethane, and the like. Examples of the electrolyte that is a solute of the nonaqueous electrolytic solution include LiPF ₆ , LiClO ₄ , and LiCF ₃ SO ₃ .

(Exterior material)
In a lithium nonaqueous electrolyte battery using a nonaqueous organic solvent, a laminated structure in which a metal foil and a polymer film are bonded is used as an exterior material. This is a combination of these materials in order to prevent the gas containing the organic solvent inside and outside the battery from flowing and to improve the mechanical strength. The adhesive used in this laminated structure needs to be an adhesive that is not eroded by an organic solvent, and has a hydrophilic surface such as a metal foil surface and a hydrophobic surface such as a polymer film. It is necessary to have a function capable of being joined, and as described above, chitosan or a derivative thereof is suitable.

  The metal foil used as an exterior material in the present invention is a foil of a metal such as aluminum, copper, nickel, iron, stainless steel or an alloy thereof, and the thickness thereof is not particularly limited, but is used for a battery. If it is, the range of 10-100 micrometers is preferable. The surface may be a rolled processed surface as it is, or may be roughened. By roughening the surface by sandblasting or the like, an improvement in adhesion can be expected.

The polymer film used as the exterior material in the present invention is preferably determined in consideration of mechanical strength, airtightness, electrical insulation, heat resistance, and the like. As materials having these characteristics, materials such as polypropylene, polyethylene, polyester, polyamide, polyimide, polyvinylidene fluoride, and polyurethane are suitable. As a laminated structure suitable for the exterior material, a laminated structure made of a polyamide film such as nylon, a metal foil, and a polyolefin film is suitable.
The surface of such a laminated structure may be the surface of the polymer material itself, but it is preferable to make it hydrophilic by oxidation treatment or the like because the adhesive strength is further improved. In addition, the adhesiveness can be further improved by modification by maleation. The thickness of the film is not limited at all, but when the structure is used in a battery, a range of 10 to 100 μm is preferable.

  As described above, the laminated structure having such a structure can be used not only for battery exterior materials but also for foods using characteristics such as moisture resistance, mechanical strength, heat resistance, deodorization, oxygen permeation prevention, and the like. It can be used for packaging exterior materials, pharmaceutical exterior materials, and the like.

Specifically, the laminate suitable for use as the exterior material of the present invention is preferably a laminate in which polymer films are laminated on both surfaces of a metal foil. As the polymer film, polyamide is suitable as the first polymer film that is outside the nonaqueous electrolyte battery. A modified polyolefin is suitable as the second polymer film that hits the inside of the nonaqueous electrolyte battery that contacts the nonaqueous electrolyte. The first polymer film and the metal foil can be joined by adhesion using a solvent-soluble adhesive.
In addition, the second polymer film and the metal foil are bonded by applying a primer containing chitosan or a derivative thereof on the surface of the metal foil, drying, and then heating and pressing with the polymer film via a hot melt adhesive. Can be joined. In this case, the use of the hot melt adhesive can be omitted as long as the second polymer film itself has the property of being thermally bonded.

[Method for producing non-aqueous electrolyte battery]
This non-aqueous electrolyte battery can be manufactured as follows.
(1) Production of electrode body unit A positive electrode current collector plate and a negative electrode current collector plate are produced by cutting a conductive metal foil into a predetermined shape. The positive electrode is prepared by mixing a positive electrode active material, a conductive agent, and a binder and applying the mixture to the surface of the positive electrode current collector plate. The negative electrode is prepared by mixing a negative electrode active material and a binder and applying the mixture to the surface of the negative electrode current collector plate. In this positive and negative electrode, conventionally known materials can be used as the active material, binder, etc., but as the binder used for binding between the active material and the current collector, chitosan or a derivative thereof can be used. It is preferable to use a binder containing an organic compound having at least one carboxyl group in the molecule. The separator is produced by cutting a polyolefin-based porous film into a predetermined shape. A plurality of these positive electrodes, separators, and negative electrodes are overlapped to form an electrode body unit.
Moreover, a long positive electrode, a separator, a negative electrode, and a 2nd separator can be wound in a coil shape, and this can be compressed flatly to make an electrode body unit.

(2) Formation and connection of tab terminals After cutting the metal foil into a desired shape, a primer is applied to the surface. The primer can be applied by dissolving chitosan or a derivative thereof in an aqueous solvent and coating the surface of the tab lead material or immersing the tab lead material in the primer solution and then drying.
Next, a set of insulating films is superposed on the surface of the tab lead material, and the tab lead material and the insulating film are adhered by a method such as heat sealing. At this time, a heating device such as a hot press can be used.
The tab lead material with film thus formed is electrically connected to the positive and negative electrode current collectors of the electrode body unit formed by the above method. As described above, the primer layer is formed on the surface of the tab lead material. When the thickness of the primer layer is in the range of 5 μm or less, bonding by soldering is possible as described above.

(3) Impregnation of electrolytic solution A nonaqueous solvent, a nonaqueous electrolyte, and optionally a gelling agent are added and mixed to adjust the electrolytic solution. By immersing the electrode body unit in which the tab terminal is connected to the electrolytic solution, the electrolytic solution is impregnated. When the viscosity of the electrolytic solution is high, it takes a long time for the electrode body unit to be impregnated with a sufficient amount of the electrolytic solution. In such a case, the impregnation can be efficiently performed by disposing the electrode body unit in a container that can be depressurized, injecting the electrolytic solution into the container after depressurizing.

(4) Exterior After that, a laminated body having a first polymer film, a metal foil, and a second polymer film is disposed so as to enclose the electrode body unit impregnated with the electrolytic solution, and the surface is made of a polymer film. The laminated film is sealed in a state where the tab-like lead terminal with film led out from the electrode unit is sandwiched. This sealing can be performed by heat sealing when the opposite surfaces of the laminate film are polymer films, which are heated and bonded. On the other hand, if the opposing surfaces are a film and a metal foil, it is preferable to perform sealing using an adhesive.

  The impregnation step (3) may be performed before the separator is overlapped with the positive electrode and the negative electrode, or after the porous film is overlapped with the positive electrode plate and the negative electrode plate to form the electrode body unit. Also good.

A non-aqueous electrolyte battery can be produced by the above manufacturing method.

  Hereinafter, the present invention will be described with reference to examples and comparative examples.

(Example 1)
In order to confirm the effect of the primer of the present invention, a primer mainly composed of chitosans on the surface of an aluminum foil having a width of 3 mm, a length of 50 mm and a thickness of 0.1 mm (World Rock X-SC01 (registered trademark): solid content 5% ) Was previously applied and dried by an immersion method to form a primer layer having a thickness of 500 nm to 1 μm. Then, a 7 mm × 7 mm maleated polypropylene insulating film was adhered to the surface by heat sealing to prepare a test piece having the structure shown in FIG.

(Comparative Example 1)
A test piece was prepared in the same manner as in the above example, except that a foil treated with a 5% aqueous sodium hydroxide solution without performing primer treatment was used as the aluminum foil.

(Peel test)
The peel test pieces prepared in Example 1 and the comparative example were immersed in 1M LiPF6 solution electrolyte, left in a constant temperature bath at 60 ° C. for a predetermined time, and then the insulating film and the aluminum foil were pulled to form an adhesive portion. The test which peels was performed.
As a result, the peel test piece of the comparative example peeled off in the sample after standing for 7 days, whereas the peel test piece of the present example did not peel at all in the sample after standing for 20 days.

(Hydrofluoric acid immersion test)
The peel test pieces of Examples and Comparative Examples were immersed in a 1.0% hydrofluoric acid aqueous solution for 30 minutes, and the peel test was performed.
As a result, in the peel test piece of Example 1, no peel was observed in all 10 peel test pieces, while in the peel test piece of the comparative example, 10 peel test pieces did not peel. There were only 6 samples.

(Example 2)
A non-aqueous electrolyte battery having a battery capacity of 150 mAh was produced according to the following specifications.

  Aluminum foil was used for the positive electrode current collector plate, and copper foil was used for the negative electrode current collector plate. From these current collector plates, an aluminum foil tab terminal was connected to the positive electrode, and a copper foil tab terminal was connected to the negative electrode. A maleated polypropylene film was bonded to the surface of the tab terminal of the aluminum foil and copper foil using a primer containing chitosan.

The positive electrode is a mixture of LiCoO ₂ powder as a positive electrode active material, carbon powder (Ketjen Black) as a conductive agent, and PVdF powder as a binder in a weight ratio of 90: 3: 2: 5. Was made into a slurry, applied to the surface of the positive electrode current collector plate, and vacuum heat-treated. The area of the positive electrode was 52 cm ² and its thickness was 80 μm.

For the negative electrode, graphite powder as the negative electrode active material and fluororesin as the binder are mixed at a weight ratio of 95: 5, and the mixture is slurried and applied to the surface of the negative electrode current collector plate. It was prepared by heat treatment. The area of the negative electrode plate was 58 cm ² , and the thickness was 65 μm.
A porous film made of polypropylene was used for the separator.

  Then, the positive electrode, the separator, and the negative electrode were overlapped to produce an electrode body unit.

As the non-aqueous electrolyte, a solution in which 1 mol / L of LiPF ₆ was dissolved in a mixed solvent of 5: 5 in a volume ratio of ethylene carbonate (EC) and diethyl carbonate (DEC) was used.

  And, an aluminum laminate film in which a polyamide film is attached to one surface of an aluminum foil by a dry laminate method and a polypropylene film is attached to the other surface of the aluminum foil by a heat laminate method so as to sandwich the electrode body unit. The three sides (upper edge and both side edges) were heat-sealed to form an exterior body, and 3 ml of the above impregnation solution was injected. In addition, when sealing the upper edge part, it sealed in the state which pinched | interposed the lead terminal and the lead terminal.

(Comparative Example 2)
A nonaqueous electrolyte battery was prepared in the same manner as in Example 1 except that a modified SEBS adhesive (World Lock X-P004 (registered trademark)) was used as a primer.

(Leakage test)
A discharge test was performed by applying a load of 3.8 V to each of the batteries of Example 2 and Comparative Example 2 in a constant temperature and humidity chamber having a temperature of 40 ° C. and a humidity of 90%. As a result, in the battery of Example 2, no abnormality was observed even in 7 days in all of the 10 sample batteries. On the other hand, in the battery of Comparative Example 2, liquid leakage was observed for 3 out of 10 samples.

[Modification]
In the foregoing, the application of the adhesive of the present invention to a nonaqueous electrolyte battery has been mainly described. This is because the primer of the present invention is particularly excellent in resistance to non-aqueous electrolytes, but the primer of the present invention has sufficient adhesion assisting ability compared with ordinary primers. In addition to the electrolyte battery, for example, a fuel cell, it can be applied as an adhesion improving surface treatment agent.

FIG. The figure of the tab terminal part shown by the broken-line circle P in FIG. Sectional drawing cut | disconnected along the A-A 'line | wire in FIG.

Explanation of symbols

11 ... Power generation element (electrode body unit)
DESCRIPTION OF SYMBOLS 12 ... Exterior material 13 ... Tab-shaped terminal 14 ... Insulating film 15 ... Tab lead material with a film

Claims (6)

  A tab lead material for a non-aqueous electrolyte battery, wherein a primer layer containing chitosan or a derivative thereof is formed on a surface of a metal foil to a thickness of 200 nm to 5 μm.   The metal foil is made of any one of aluminum, copper, and nickel, a laminate foil of two or more of these metals, a laminate foil obtained by plating these metal foil surfaces, or these metal foils The tab lead material for a nonaqueous electrolyte battery according to claim 1, wherein the foil is a foil having a surface plated and then rolled.   The tab lead material for a nonaqueous electrolyte battery according to claim 1 or 2, wherein an insulating film is bonded to a part of the surface of the tab lead material. Applying a primer made of chitosan or a derivative thereof to a metal foil;
Drying the metal foil coated with the primer to form a primer layer having a thickness of 200 nm to 5 μm;
A method for producing a tab lead material for a non-aqueous electrolyte battery with a film, comprising a step of adhering an insulating film to the dried primer-coated metal foil surface by heat sealing.   The method for producing a tab lead material for a nonaqueous electrolyte battery according to claim 4, wherein in the primer coating step, the primer is coated using an aqueous solution of chitosan or a derivative thereof. A positive electrode current collector provided with a positive electrode active material layer;
A negative electrode current collector provided with a negative electrode active material layer;
A separator sandwiched between the positive electrode current collector and the negative electrode current collector;
In a non-aqueous electrolyte battery in which a power generation element composed of a non-aqueous electrolyte impregnated in the separator is sealed in an exterior material,
A tab lead material in which a primer layer made of chitosan or a derivative thereof is formed to a thickness of 200 nm to 5 μm on the surface of a metal foil electrically connected to the positive and negative electrode current collector is used. Water electrolyte battery.

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