JP5284896B2 - Electrode for lithium non-aqueous electrolyte battery, positive electrode current collector for lithium non-aqueous electrolyte battery, and method for producing the same - Google Patents

Description

  The present invention relates to a lithium nonaqueous electrolyte battery, and more particularly to a lithium nonaqueous electrolyte battery using an electrode mixture having improved contact resistance with an electrode current collector and a method for manufacturing the same.

  In recent years, small portable electronic devices such as digital cameras and PDAs have come to be widely used. These electronic devices are always required to have a minimum volume and light weight, and it is also required to realize a small, light and large-capacity battery for the mounted battery. In addition, for large secondary batteries for use in automobiles, it is desired to realize a large nonaqueous electrolyte secondary battery instead of the conventional lead storage battery.

  In response to such demands, lithium non-aqueous electrolyte batteries are being actively developed. In an aqueous battery, since the water decomposition voltage is limited to 1.23 V, a 2 V lead battery has the highest voltage even when hydrogen or oxygen overvoltage is taken into consideration. However, in a lithium non-aqueous electrolyte battery, it is possible to realize a high energy density by improving an organic solvent and an electrolyte that are not decomposed at a high voltage. However, the conductivity of the organic electrolyte is remarkably lower than that of the aqueous solution, and the specific conductivity is about 10 mS / cm. 5% sulfuric acid aqueous solution (lead battery aqueous solution) and 6M KOH aqueous solution (alkali manganese battery electrolysis). Conductivity) of 1/10 to 1/10 of (liquid). Therefore, in order to improve current characteristics, it is necessary to increase the electrode area, and instead of the bobbin type used in conventional batteries such as dry batteries, the jelly roll type battery structure adopted for aluminum electrolytic capacitors etc. is used. It has been.

  The structure of the jelly-roll type lithium non-aqueous electrolyte battery is shown in FIG. 1 which is a partial cutaway view thereof, and FIG. 2 which is a cross-sectional view of a cell body which is a power generation element of the lithium non-aqueous electrolyte battery. As shown in FIGS. 1 and 2, the battery 10 includes a negative electrode current collector 21, a negative electrode mixture 22, an electrolyte layer 24 composed of an electrolytic solution and a gelling agent, a separator 25, an electrolyte layer 26, and a positive electrode mixture. 27 and the positive electrode current collector layer 29 are covered with a highly airtight exterior material 11. The electrodes connected to the cell body 12 are led out from the current collectors 21 and 29 as tab-shaped terminals 13 and 14.

  In a lithium nonaqueous electrolyte battery having a laminated structure as shown in FIG. 2, in order to ensure high current characteristics, in addition to increasing the electrode area, it is indispensable to reduce the contact resistance at the interface of each layer.

Conventionally, as the positive electrode current collector, aluminum that has excellent corrosion resistance with an organic electrolyte, is lightweight, and easy to machine is mainly used.
As the electrode mixture, an active material such as a lithium-containing salt or a conductive auxiliary powder such as carbon powder is mixed with a binder (binder) to form a slurry.
As the binder, PVDF (polyvinylidene fluoride) -based material is generally used. This binder is contained in the electrode mixture in order to bond the electrode current collector and the electrode mixture.

  Here, under the normal use conditions of the lithium nonaqueous electrolyte battery, an oxide film that is an insulator is formed on the surface of aluminum that is the electrode current collector. For this reason, an insulating oxide film is interposed at the interface between the electrode current collector and the electrode mixture, and an increase in contact resistance is particularly problematic.

As described above, in a lithium nonaqueous electrolyte battery having a laminated structure, in order to ensure high current characteristics, the contact resistance of each layer is reduced, and in particular, the contact resistance between the electrode and the electrode mixture interface where resistance is likely to increase. Reduction is required.
However, conventional electrode composite materials have not been able to reduce the contact resistance between the electrode current collector and the electrode composite interface enough to ensure high current characteristics, so the performance of lithium nonaqueous electrolyte batteries has been improved. It was difficult.

  The present invention was made to solve the problems in the electrode mixture used in conventional lithium non-aqueous electrolyte batteries, etc., and by reducing the contact resistance between the electrode current collector and the electrode mixture, The object is to realize a lithium non-aqueous electrolyte battery with improved current characteristics.

According to a first aspect of the present invention, a composition layer composed of an active material, a conductive additive, and a chitosan derivative having a degree of deacetylation represented by Chemical Formula 1 of 80% or more is formed on the surface of a positive electrode current collector composed of an aluminum thin film. This is an electrode for a lithium non-aqueous electrolyte battery.

.... Chemical formula 1

  In the first invention, the conductive auxiliary agent is preferably acetylene black.

1st invention WHEREIN: It is preferable that the said composition consists of 1-6 mass parts of binders containing 100 mass parts of active materials, 1-15 mass parts of conductive support agents, and a chitosan derivative.

  According to a second aspect of the present invention, there is provided a positive electrode current collector for a lithium non-aqueous electrolyte battery, wherein a composition layer comprising a conductive aid and a chitosan derivative represented by Chemical Formula 1 is formed on an aluminum foil surface film. is there.

  A third invention is a lithium non-aqueous electrolyte battery characterized in that a conductive auxiliary agent and a dispersion in which a chitosan derivative represented by Chemical Formula 1 is dispersed in water or an organic solvent are applied to the surface of the aluminum foil and then dried. It is a manufacturing method of a positive electrode electrical power collector.

  In the third invention, the dispersion preferably further contains an organic compound having at least one carboxyl group in the molecule.

  According to the present invention, there is provided a lithium non-aqueous electrolyte battery having an improved current characteristic, which can reduce the contact resistance at the interface between a current collector such as aluminum on which an insulating oxide film is formed and an electrode mixture. Can be obtained. Moreover, it is excellent in the adhesiveness of the active material etc. to the surface of a collector, and the active material etc. are not peeled off from the collector, and a long-life battery can be realized.

FIG. Sectional drawing which shows the electric power generation element (electrode body unit) of a nonaqueous electrolyte battery. Sectional drawing of the laminated body used with the battery of this invention.

  As described above, the present invention is characterized in that an electrode mixture containing a chitosan derivative, acetylene black and an active material is used.

[Nonaqueous electrolyte battery]
As shown in FIGS. 1 and 2, the nonaqueous electrolyte battery suitable for applying the present invention has the following structure. That is, a positive electrode and a negative electrode are overlapped with a separator 25 inside the exterior material 11 formed using a sheet body obtained by bonding a metal foil and a polymer film with an adhesive, or flattened after winding. In this structure, the rectangular electrode body unit 12 is accommodated, and the separator 25 is impregnated with an electrolyte. In this electrode body unit 12, a positive electrode current collector plate 29 is disposed on the positive electrode side surface, a negative electrode current collector plate 21 is disposed on the negative electrode side surface, and a positive electrode mixture layer is formed on the surface of the positive electrode current collector plate. In addition, a negative electrode mixture layer is formed on the surface of the negative electrode current collector. The lead terminals of the positive electrode current collector plate and the lead terminals of the negative electrode current collector plate protrude from the upper edge of the outer package 11 to the outside and form tab terminals 13 and 14 that lead out to the outside. Olefin films 15a and 15b are attached to the surfaces of these tab terminals 13 and 14, and when sealed by heat sealing using the exterior material 11, the surface of the tab terminals 13 and 14 is packaged. The material 11 is bonded in an airtight manner. As this olefin film, a modified polyolefin such as maleated polypropylene is suitable.

  The electrode mixture using the chitosan derivative of the present invention as a binder and acetylene black as a conductive additive can be used for both the positive electrode and the negative electrode, but when applied to the positive electrode mixture, it is superior to the conventional one. Demonstrate the effect.

(Electrode mixture)
As the electrode mixture, a composition containing an active material, a conductive additive, and a binder is used.
The chitosan derivative of Chemical Formula 1, which is the main component of the binder used in this electrode mixture, is chitin, a β-poly-N, which is a naturally-derived polymer substance obtained from crab, shrimp, shells of insects, mushrooms and the like. - to glycerin Li Le a part of the functional groups of chitosan is a polysaccharide containing amino groups for the 2-amino-2-deoxy -D- glucose obtained by deacetylating the acetyl -D- glucosamine and the structural unit Can be obtained.

Such chitosan derivatives are produced industrially, are supplied in various grades, and are commercially available.
In the present invention, a chitosan derivative having a degree of deacetylation of 80% or more is 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. On the other hand, if the molecular weight exceeds this range, the viscosity of the aqueous solution increases. Therefore, it is inappropriate for use in the present invention in terms of handling such as workability.

  In addition, as a specification of the binder, it is preferable that these chitosan derivatives further contain an organic compound having at least one carboxyl group in the molecule.

In the present invention, the electrode collector of the non-aqueous electrolyte battery and the electrode mixture are joined using a binder containing a chitosan derivative. As the binder, an aqueous solution in which the chitosan derivative is dissolved in water can be used. it can. The concentration is preferably in the range of 0.1 to 20% by mass. When the concentration of the chitosan derivative is less than 0.1% by mass, the adhesive strength is not increased and it is not practical. On the other hand, when the concentration of the chitosan derivative exceeds the above range, the viscosity increases and handling becomes difficult.
In addition to the chitosan derivative, an additive such as an organic compound having at least one carboxyl group in the molecule, a rheological property improver (thixotropic improver), a preservative, an antioxidant may be used as the binder. it can.

As the active material of the present embodiment, a material generally known as a nonaqueous electrolyte battery can be used without any particular limitation.
Specifically, for example, lithium-containing salt as the cathode active material _{(LiCoO 2, LiNiO 2, LiMnO} 2, LiFeO 2 and the like), or the like can be used graphite powder as a negative electrode active material.

  Moreover, a conductive additive is contained in the electrode mixture in order to reduce the electrical resistance in the electrode mixture and to reduce the interface contact resistance with the electrode current collector. As the conductive additive, carbon black, which is granular carbon, can be used. In particular, acetylene black having a small particle size and a remarkable reduction in interfacial contact resistance is preferable.

  The mixing ratio of the composition of the electrode mixture can be in the range of 100 parts by mass of the active material, 1 to 15 parts by mass of the conductive additive, and 1 to 6 parts by mass of the binder containing the chitosan derivative. If the amount of the active material is less than this range, the battery capacity is undesirably reduced. On the other hand, if the amount of the binder is less than this range, peeling is likely to occur when the current collector is formed into a film, and handling becomes difficult. On the other hand, when the amount of the conductive assistant is below this range, the contact resistance between the electrode mixture and the current collector increases, and the electrical characteristics of the battery deteriorate.

  The above-mentioned binder, active material and acetylene black are mixed and water or an organic solvent is added to form a slurry, which is applied to the surface of the electrode current collector described later and dried to form a laminated structure of the electrode mixture and the current collector. Form. As the organic solvent, organic solvents that are usually used in paints, adhesives and the like can be employed.

(Current collector)
Electricity is taken out of the battery by the electrode current collectors 21 and 29.
As the electrode current collector of the present embodiment, a generally known material can be used as a nonaqueous electrolyte battery without any particular limitation.
Specifically, for example, aluminum, tantalum, niobium, titanium, hafnium, zirconium, zinc, tungsten, bismuth, antimony, or the like can be used for the positive electrode current collector, and copper or the like can be used for the negative electrode current collector.
As the positive electrode current collector, aluminum that has excellent corrosion resistance to an organic electrolyte, is lightweight, and is easy to machine is preferable.

(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.

  As shown in FIG. 3, the laminated structure of the present embodiment includes a polymer film 31, an adhesive 32 having chitosan derivatives as main components, a metal foil 33, an adhesive 34, and a polymer film 35. Is.

  The metal foil used 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. The range of 10-100 micrometers is preferable. The surface may be a rolled processed surface as it is, or may be roughened.

The polymer film used 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 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.

(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 electrolyte. 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 .

(Tab terminal part)
As described above, the tab terminal is a terminal derived from the positive and negative electrode collectors, and has a structure derived from the sealing joint interface of the exterior material to the outside. The tab terminals 13 and 14 are made of a metal foil such as aluminum or nickel. Even if the exterior material is heat-sealed, the tab terminals 13 and 14 have an airtight adhesion between the tab terminal and the exterior material. In order not to occur, it is preferable that the polymer films 15a and 15b are bonded in advance to the surfaces of the tab terminals 13 and 14, respectively.

  The lithium non-aqueous electrolyte battery according to the present embodiment has the above-described structure, and in this structure, an electrode mixture containing a chitosan derivative, acetylene black and an active material is used. It is preferable for reducing contact resistance with the composite material, ensuring high current characteristics, and improving battery performance.

(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 and the negative electrode are prepared by dispersing a positive and negative electrode active material, a conductive additive, and a binder in water or an organic solvent to form a dispersion, and applying and drying on the surface of the current collector plate. In this positive and negative electrode, an adhesive containing a chitosan derivative and an organic compound having at least one carboxyl group in the molecule is preferably used as a binder. 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) Impregnation of electrolytic solution A nonaqueous solvent, a nonaqueous electrolyte, and optionally a gelling agent are added and blended to adjust the electrolytic solution. By immersing the electrode body unit in the electrolytic solution, the electrolytic solution can be 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.

(3) Exterior material 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 polymer film is disposed on the surface. The laminated film is sealed in a state where the tab-shaped lead terminal led out from the electrode body 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 surface is a metal foil, sealing can be performed using an adhesive.

  The impregnation step (2) may be performed before the separator is overlaid with the positive electrode and the negative electrode, or after the porous film is overlaid 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 experimental examples and comparative examples.

(Electrode creation method)
As the positive electrode current collector, an aluminum foil (polycrystalline 99.99%, 0.1 mm thickness, for electrolytic capacitor) was used. This aluminum foil was used as a 7 mm × 7 mm flag electrode, and the electrode area was 10 −4 m ² (= 1 cm ² ) on both sides. The handle portion was previously anodized in an aqueous solution of ammonium adipate in order to suppress the change in the immersion area accompanying the change in wettability due to anode polarization). This handle portion was directly sandwiched between screws and fixed to obtain a sample electrode. Flag electrodes are most often used in industrial tests. In order to make the electrode area constant, it is effective to mask the lead portion of the electrode. The vicinity of the liquid surface is likely to generate noise due to the change in wettability of the anodic oxide film. Therefore, the apparent electrode area was made constant by anodizing the pattern portion at a high voltage in advance. The masking method using an anodic oxide film has the advantage that the adhesion is high and the preparation is simpler and more reliable than sealing with resin or tape. On the other hand, there is a limitation that it cannot be used in a solution containing chloride ions.

The surface exposed to the solution was 7 × 7 mm square, and 1 cm ^{2 on} both sides. The shape of this test piece was referred to the EIAJ standard. In order to reduce the influence of the change in the electrode area due to the liquid level fluctuation, the handle portion was masked by anodizing to a potential higher than the measurement potential in advance.

Alkaline degreasing was performed as a pretreatment of the electrode. The surface of aluminum is covered with a natural oxide film, and machine oil during rolling is also attached. Therefore, pre-measurement processing is important for obtaining highly reproducible results. Various methods such as electrolytic polishing and alkaline degreasing have been studied for pretreatment of aluminum. Here, alkaline degreasing which is simple and quick and relatively good reproducibility is obtained was used. Alkaline degreasing was rinsed in 1 M NaOH for 60 seconds, distilled water for 10 seconds, neutralized with 0.65 M HNO ₃ for 30 seconds, and again rinsed with distilled water for 10 seconds. When it was necessary to remove moisture, it was performed by soaking in MeOH.

(Binder sample)
As binder samples, two types of binders were used: a chitosan derivative binder (manufactured by Kyoritsu Chemical Industry Co., Ltd.) and a PVDF binder generally used as a binder for lithium ion secondary batteries as a comparison.

(Mixture of binder and carbon (AB: acetylene black))
To mix the binder and AB, first put the dispersion medium, binder and AB into the sample bottle. The sample bottle was sonicated to prepare a carbon dispersion in which AB was dispersed in a binder.

(Application of binder and carbon (AB) to current collector)
The binder was applied to the current collector by dip coating and then drying. The drying conditions after the dip coating were performed under the conditions that the first step was in the atmosphere at 80 ° C. for 0.5 hours, and the second step was in vacuum at 160 ° C. for 4 hours. Then, after the drying treatment, heat treatment was performed in the atmosphere at 260 ° C.

(Electrolyte)
As the organic electrolytic solution of this example, an electrolytic solution containing LiBF ₄ and LiClO ₄ as an electrolyte and dissolved in a mixed solvent of propylene carbonate (PC) and dimethoxyethane (DME) having high dielectric constant was used.

(Electrolytic cell)
In an organic electrolyte cell that handles a lithium battery, special attention must be paid to moisture contamination. Therefore, the electrolytic cell for observing the image in a relatively short time was assembled and measured in a glove box substituted with argon. When measuring using an organic electrolyte outside the glove box, the airtight cell was assembled in the glove box and taken out. Pt was used as the counter electrode of the electrolytic cell of the organic electrolyte, and Ag was used as the pseudo reference electrode. In electrochemical measurement of a lithium ion secondary battery, Li is often used as a reference electrode, but in this embodiment, Ag is used as a pseudo reference electrode. The reason why Ag is used as a pseudo reference electrode is to expand the potential control range on the anode side of the potentiostat and facilitate comparison with the aqueous solution system. It has been confirmed by actual measurement that the potential of the Ag pseudo reference electrode is +3.0 V with respect to Li.
Pt was used for the counter electrode of the aqueous electrolytic cell, and a silver / silver chloride electrode was used for the reference electrode. When anodic oxidation is performed, it is necessary to prevent contamination of chloride ions as much as possible. In order to prevent chloride ion contamination, the reference electrode was connected with a double salt bridge. The measurement was performed in a three-pole system using platinum as a counter electrode and a saturated KCl-silver / silver chloride electrode connected by a double salt bridge filled with the same solution as the electrolytic solution as a reference electrode.

Below, the test method which evaluates is demonstrated.
(Cyclic voltammetry (potential-current))
A cyclic voltammetry test, which is the most general method for electrochemical measurement, was performed. This method is a method of observing the current response at the time when the potential sweep is repeated. There are examples that have been studied in various cases such as the diffusion state of the product and the reversible system of the system at the solid / liquid interface that is generally handled, but there are no examples in the film generation system or battery system. When the thickness of the film is deposited using Faraday's law, if the absolute value of the potential is used, the initial film thickness is not known, and the influence of side reactions is not known. However, by obtaining the potential sweep rate, the internal electric field strength can be evaluated and the presence or absence of a side reaction can be evaluated from the state of the current flat portion even if the initial film thickness is not known.
Further, the contact resistance between Al and the binder can be obtained from the current-voltage characteristics.

(Experimental example 1)
3% by mass of a chitosan derivative-based binder and 3% by mass of carbon (AB) were applied to a current collector, and cyclic voltammetry evaluation was performed.

(Comparative Example 1)
3% by mass of PVDF binder and 3% by mass of carbon (AB) were applied to a current collector and subjected to cyclic voltammetry evaluation.

(result)
As a result of conducting a cyclic voltammetry test on the above experimental example and comparative example, even when the chitosan derivative of this example was used, a result comparable to the experimental example using the conventional PVDF binder was obtained. .

(Binder adhesion state)
In both the experimental example and the comparative example, discoloration and peeling did not occur under dry conditions.

(Contact resistance between Al and binder)
The contact resistance between Al and the binder was determined from the current-voltage characteristics obtained from the cyclic voltammetry evaluation. As a result, it has been clarified that the contact resistance between Al and the binder is lowered when the chitosan dielectric binder is used as compared with the PVDF binder.

(Peeling of active material)
In the case of using the chitosan derivative binder of the present invention, no peeling of the active material from the current collector was observed even after long-term use. On the other hand, when the PVDF binder was used, peeling was observed.

(Summary of results)
From the above results, it was revealed that when the chitosan derivative of the present invention was used as a binder, the active material was not peeled even in the nonaqueous electrolyte, and a long-life battery could be realized. Moreover, compared with the case where the conventional PVDF binder was used, there was no fading electrochemically.

DESCRIPTION OF SYMBOLS 10 ... Nonaqueous electrolyte battery 11 ... Exterior material 12 ... Power generation element (electrode body unit)
DESCRIPTION OF SYMBOLS 13, 14 ... Tab-shaped terminal 21 ... Negative electrode collector 23 ... Negative electrode mixed material 24 ... Electrolyte layer containing electrolyte solution 25 ... Separator 26 ... Electrolyte layer 27 ... Positive electrode mixed material 29 ... Positive electrode collector layer 31 ... 1st Polymer film 32 ... Adhesive 33 ... Metal foil 34 ... Adhesive 35 ... Polymer film

Claims (4)

Lithium comprising a composition layer comprising an active material, a conductive aid and a chitosan derivative having a deacetylation degree of 80% or more represented by Chemical Formula 1 on the surface of a positive electrode current collector comprising an aluminum thin film Nonaqueous electrolyte battery electrode.

.... Chemical formula 1   The electrode for a lithium non-aqueous electrolyte battery according to claim 1, wherein the conductive additive is acetylene black.   The said composition consists of 1-6 mass parts of binders containing 100 mass parts of active materials, 1-15 mass parts of conductive support agents, and a chitosan derivative, The Claim 1 or Claim 2 characterized by the above-mentioned. Electrode for lithium non-aqueous electrolyte battery.   The electrode for a lithium non-aqueous electrolyte battery according to any one of claims 1 to 3, wherein the chitosan derivative represented by the chemical formula 1 is a compound obtained by glycerylating a part of the functional group of chitosan. .

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