KR20160002252A - Electrode comprising binder layer, electrode assembly comprising the electrode, and method of preparing the electrode - Google Patents

Abstract

The present invention relates to an electrode including a binder layer, an electrode assembly including the same, and a manufacturing method of the electrode. According to an aspect of the present invention, the electrode comprises: an electrode active material layer coated on a current collector, and including a first binder, electrode active material particles, and pores between the electrode active material particles; and the binder layer formed in one or more types of areas of the surface of the electrode active material particle and one side of the electrode active material layer, and including a second binder which includes an acrylate-based monomer represented by the chemical formula 1. According to an embodiment of the present invention, structural stability and performance of the electrode assembly including the electrode and a battery can be enhanced by achieving a high adhesion and low interfacial resistance with a separation membrane in the electrode.

Description

[0001] The present invention relates to an electrode including a binder layer, an electrode assembly including the same, and a method of manufacturing the electrode,

The present invention relates to an electrode including a binder layer, an electrode assembly including the same, and a method of manufacturing the electrode.

Recently, interest in energy storage technology is increasing. As the application fields of cell phones, camcorders, laptops and even electric vehicles are expanded, efforts for research and development of electrochemical devices are becoming more and more specified. The electrochemical device is one of the most remarkable fields in this respect, and the development of a rechargeable secondary battery has become a focus of attention.

Among the currently applied secondary batteries, the lithium secondary batteries developed in the early 1990's are attracting attention because they have higher operating voltage and higher energy density than conventional batteries such as Ni-MH. However, there is a fear that the lithium secondary battery may generate an explosion due to a heat generation phenomenon depending on the use environment.

In order to solve the safety problem of such an electrochemical device, it is necessary to enhance the safety due to strong integration of the separator and the electrode by increasing the coupling force between the separator and the electrode, and to increase the interfacial resistance of the separator and the electrode due to the electrode side reaction There is still a need for a binder that suppresses the permeability and improves air permeability, and electrodes and electrode assemblies using the same.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an electrode having a binder layer that improves the adhesion between the separator and the electrode and maintains the pore structure in the electrode active material layer by solving the above-mentioned problems, and a method for producing the same have.

According to an aspect of the present invention, there is provided an electrode active material layer coated on a collector, the electrode active material layer including pores between a first binder, electrode active material particles and the electrode active material particles; And a binder layer formed on at least one surface of the surface of the electrode active material layer and on one surface of the electrode active material layer and including a second binder including an acrylate monomer represented by the following Formula 1: / RTI >

According to another aspect of the present invention, there is also provided a method for manufacturing a thin film magnetic head, comprising: applying a slurry in which electrode active material particles are dispersed in a first binder solution dissolved in a first solvent to a collector; removing the first solvent from the slurry Forming an electrode active material layer; And a second binder solution containing an acrylate monomer represented by the following formula (1) in a second solvent is coated on the electrode active material layer, and the second solvent is removed from the second binder solution Thereby forming a binder layer.

According to an embodiment of the present invention, the structural stability and performance of the electrode assembly including the electrode and the battery can be enhanced by achieving high adhesion and low interface resistance with the separator at the electrode.

Hereinafter, the present invention will be described in detail. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor may designate the concept of a term appropriately in order to describe its own invention in the best way possible. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the constitution described in the embodiments of the present invention is merely an embodiment of the present invention, and does not represent all the technical ideas of the present invention, so that various equivalents and modifications It should be understood.

According to an aspect of the present invention, there is provided an electrode including an electrode active material layer and a binder layer applied on a current collector.

The electrode used in the present invention may be a positive electrode or a negative electrode, and thus the kind of the electrode active material and the current collector may be different. Also, in the case of the electrode assembly according to an embodiment of the present invention, if the electrode is determined to be the anode or the cathode, then the second electrode will be defined as a cathode or anode opposite to the electrode.

The electrode is not particularly limited and an electrode active material (usually taken in particle form) can be produced in the form bound to a current collector according to a conventional method known in the art. Examples of the cathode active material include, but are not limited to, lithium manganese oxide, lithium cobalt oxide, lithium nickel oxide, lithium iron oxide, or a combination thereof A lithium complex oxide may be used. As a non-limiting example of the negative electrode active material, a conventional negative electrode active material that can be used for a negative electrode of an electrochemical device can be used. In particular, lithium metal or a lithium alloy, carbon, petroleum coke, activated carbon, Lithium adsorbing materials such as graphite or other carbon-based materials and the like can be used.

In the current collector, a non-limiting example of the positive current collector is aluminum, nickel, or a foil produced by a combination thereof. Non-limiting examples of the negative current collector include copper, gold, nickel, And a foil manufactured by combination.

The electrode active material layer includes pores between the first binder, the electrode active material particles as described above, and the electrode active material particles.

Wherein the first binder is selected from the group consisting of polyvinylidene fluoride, polyvinyl alcohol, carboxymethylcellulose (CMC), starch, hydroxypropylcellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene, But are not limited to, polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene butylene rubber and fluororubber.

And a binder layer is formed on at least one of the surface of the electrode active material particle and one surface of the electrode active material layer.

Wherein the binder layer comprises a second binder and the second binder comprises an acrylate monomer represented by the following formula:

Formula 1

In this formula,

R ¹ and R ⁴ are each independently selected from the group consisting of H, C ₁ -C ₆ alkyl groups and C ₁ -C ₆ alkoxy groups,

R ² is a phosphate group; A substituted or unsubstituted trivalent C ₆ -C ₂₄ arylene group and a substituted or unsubstituted trivalent C ₃ -C ₂₄ heteroarylene group, and when they have a cyclic structure, they exist as a single ring structure , Two or more of which are bonded to each other to form a condensed ring structure; Or two or more ring structures is a single bond, O, S, C (= O), CH (OH), S (= O) 2, Si (CH 3) 2, (CH 2) p (p is 1 to 10 integer), C (CH _{3) 2} and C (= O) and from the group consisting of NH are connected with the selected functional group, R ³ is H, C ₁ -C ₆ alkyl, C ₁ -C ₆ alkoxy group and CR ⁵ ₂ = CR ⁶ -COO-R ⁷ -, R ⁵ and R ⁶ are each independently selected from the group consisting of H, C ₁ -C ₆ alkyl groups and C ₁ -C ₆ alkoxy groups, R ⁷ is selected from the group consisting of a single bond and a C ₁ -C ₁₀ alkylene group, X ¹ and X ² are each independently selected from the group consisting of a single bond, O, C ₁ -C ₆ alkyl and C ₁ -C ₆ alkoxy N is an integer of 1 to 20, and m is an integer of 1 to 20.

The acrylate monomer is easily formed as a thin film on one surface of the electrode, for example, the electrode active material layer and on the surface of the electrode active material particle, and in the case of the curing reaction, the curing proceeds well. In addition, the acrylate monomer has a structure capable of coordinating with lithium ions well in its chemical structure.

Preferably, R < ₂ > is selected from the group:

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More preferably, R < ₂ > is selected from the group:

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And

More preferably, R ₂ is H or CR ⁵ ₂ ═CR ⁶ -COO-R ⁷ -, wherein R ⁵ and R ⁶ are each independently H or a C ₁ -C ₃ alkyl group, R ⁷ is a single bond or C ₁ -C ₆ alkylene group.

The acrylate monomer is crosslinked.

The thickness of the binder layer may be submicron, for example, about 0.1 to about 1 mu m. When the thickness of the binder layer satisfies the above-described range, it is possible to sufficiently maintain the bonding force with the separating film to be bonded thereafter, and to lower the interfacial resistance therebetween.

The binder layer may have several patterned holes or may have a plurality of band shapes. In addition, the area of the binder layer contacting the electrode may be about 50 to about 70% of the area of one surface of the electrode. When the binder layer having the patterned outer appearance is provided in the above-described area range, the ion conductivity will be greatly improved while keeping the bonding strength between the porous separator and the electrode to be contacted to be excellent.

According to another aspect of the present invention, there is provided an electrode comprising: the above-described electrode; A porous separator formed on the electrode; And an electrode assembly formed on the porous separation membrane and including a second electrode opposite to the electrode.

The porous separator is not particularly limited and may be formed into a film, a nonwoven fabric or a woven fabric according to a conventional method known in the art. Non-limiting examples of the separation membrane include polyethylene, polypropylene, polyethyleneterephthalate, polybutyleneterephthalate, polyester, polyacetal, polyamide ( polyamide, polyamide, polycarbonate, polyimide, polyetheretherketone, polyaryletherketone, polyetherimide, polyamideimide, polybenzimidazole, polybenzimidazole, polyethersulfone, polyphenylene oxide, cyclic olefin copolymer, polyphenylenesulfide, and polyethylenenaphthalene. The term " polybenzimidazole " Polymer or a mixture of two or more thereof The formed film may be a non-woven or woven fabric form.

In addition, the porous separation membrane may further include a porous coating layer including inorganic particles and a third binder. Wherein the porous coating layer is formed on at least one surface of the porous separator (substrate) and at least one of the pores of the porous separator, and includes a plurality of inorganic particles and a part or all of the surface of the inorganic particles, And a third binder for connecting and securing between the first binder and the second binder.

The inorganic particles are selected from the group consisting of inorganic particles having a dielectric constant of about 5 or more, inorganic particles having lithium ion transporting ability, and mixtures thereof.

The inorganic particles having a dielectric constant of about 5 or more may be BaTiO ₃ , Pb (Zr _x , Ti _{1 -x} ) O ₃ (PZT, 0 <x <1), Pb _{1 -x} La _x Zr _{1 -y} Ti _y O ₃ (PMN-PT, 0 < x < 1), (1-x) Pb (Mg _1/3 Nb _2/3 ) O _3-x PbTiO ₃ (PLZT, 0 <x < Wherein the metal oxide selected from the group consisting of hafnia (HfO ₂ ), SrTiO ₃ , SnO ₂ , CeO ₂ , MgO, NiO, CaO, ZnO, ZrO ₂ , SiO ₂ , Y ₂ O ₃ , Al ₂ O ₃ , SiC and TiO ₂ Or a mixture of two or more thereof.

The inorganic particles having lithium ion transferring ability include, but are not limited to, lithium phosphate (Li ₃ PO ₄ ), lithium titanium phosphate (Li _x Ti _y (PO ₄ ) ₃ , 0 <x < lithium aluminum titanium phosphate _{(Li x Al y Ti z (} PO 4) 3, 0 <x <2, 0 <y <1, 0 <z <3) (LiAlTiP) x O y series glass (glass), (0 < x <4, 0 <y < 13), lithium lanthanum titanate _{(Li x La y TiO 3,} 0 <x <2,0 <y <3), lithium germanium thiophosphate Mani Titanium (Li _x Ge _y P _z S _{w, 0 <x <4,} 0 <y <1, 0 <z <1, 0 <w <5), lithium nitrides _{(Li x N y, 0 <} x <4, 0 <y <2), SiS _{2 (Li x Si y S z} , 0 <x <3,0 <y <2,0 <z <4) based glass, and _{P 2 S 5 (Li x P} y S z, 0 <x <3, 0 < y <3, 0 <z <7) series glass, or a mixture of two or more thereof.

The average particle size of the inorganic particles is not particularly limited, but may range from about 0.001 탆 to about 10 탆 for the formation of a porous coating layer of uniform thickness and proper porosity. When the average particle diameter of the inorganic particles satisfies the above range, the dispersibility of the inorganic particles can be prevented from decreasing, and the porous coating layer can be adjusted to an appropriate thickness.

The third binder may be selected from the group consisting of polyvinylidene fluoride (PVDF), polyacrylic acid (PAA), polyethylene glycol (PEG), polypropylene glycol (PPG), toluene diisocyanate ), Polymethyl methacrylate, polyacrylonitrile, polyvinylpyrrolidone, polyvinylacetate, polyethylene-co-vinyl acetate, But are not limited to, polyethylene oxide, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, cyanoethylpullulan, cyanoethylpolyvinyl alcohol cyanoethylpolyvinylalcohol, cyanoethyl cellulose, But are not limited to, cyanoethyl sucrose, pullulan, carboxyl methyl cellulose (CMC), acrylonitrile-styrene-butadiene copolymer, polyimide, , Polyvinylidene fluoride, polyacrylonitrile, and styrene butadiene rubber (SBR), or a mixture of two or more thereof, but is not limited thereto.

The third binder may be contained in an amount of about 0.1 to about 20 parts by weight, preferably about 1 to about 5 parts by weight, based on 100 parts by weight of the total amount of the third binder and the inorganic particles.

According to another aspect of the present invention, there is provided an electrochemical device including at least one of the above-described electrode assemblies.

The electrochemical device includes all devices that perform an electrochemical reaction, and specific examples include capacitors such as all kinds of primary cells, secondary cells, fuel cells, solar cells, or super-capacitor devices. Particularly, a lithium secondary battery such as a lithium ion secondary battery, a lithium polymer secondary battery, or a lithium ion polymer secondary battery is preferable.

According to another aspect of the present invention, there is provided a method of manufacturing an electrode including a step (S1) of forming an electrode active material layer and a step (S2) of forming a binder layer.

In the step S1, the first binder is first dissolved in the first solvent to form the first binder solution. Here, the first binder is as described above with respect to the electrodes herein.

The first solvent is preferably similar in solubility index to the first binder to be used, and has a low boiling point. This is because the mixing can be made uniform and then the first solvent can be easily removed. The first solvent may be selected from the group consisting of acetone, tetrahydrofuran, methylene chloride, chloroform, dimethylformamide, N-methyl-2-pyrrolidone, 2-pyrrolidone, NMP), cyclohexane, and water, but is not limited thereto.

Then, the electrode active material particles are dispersed in the first binder solution to form a slurry. Here, the electrode active material particles are as described with respect to the electrodes hereinabove.

Next, a suitable current collector is selected according to the electrode active material particles, and the slurry thus formed is applied on the selected current collector. Here, the current collector is also as described with respect to the electrode hereinabove. The coating may be carried out by a conventional coating method known in the art, for example, a dip coating method, a die coating method, a roll coating method, a comma coating method, Method can be used.

The first solvent is removed from the formed slurry to form an electrode active material layer. Removal of the first solvent may be carried out according to methods known in the art without limitation.

In step S2, a binder layer is formed on the electrode active material layer formed in step S1. Specifically, a binder layer is formed on one surface of the electrode active material layer formed in the step S1 and at least one surface of the surface of the electrode active material particles.

The binder layer includes a second binder, and the second binder includes an acrylate monomer represented by the following formula (1). A second binder solution in which the second binder is dissolved in a second solvent is coated on the electrode active material layer and the second solvent is removed from the second binder solution to form a binder layer.

Formula 1

In this formula,

R ¹ and R ⁴ are each independently selected from the group consisting of H, C ₁ -C ₆ alkyl groups and C ₁ -C ₆ alkoxy groups, R ² is a phosphate group; A substituted or unsubstituted trivalent C ₆ -C ₂₄ arylene group and a substituted or unsubstituted trivalent C ₃ -C ₂₄ heteroarylene group,

When they have a cyclic structure, they may exist as a single cyclic structure, or two or more may be bonded to each other to form a condensed cyclic structure; Or two or more ring structures is a single bond, O, S, C (= O), CH (OH), S (= O) 2, Si (CH 3) 2, (CH 2) p (p is 1 to 10 integer), C (CH _{3) 2} and C (= O) and from the group consisting of NH are connected with the selected functional group, R ³ is H, C ₁ -C ₆ alkyl, C ₁ -C ₆ alkoxy group and CR ⁵ ₂ = CR ⁶ -COO-R ⁷ -, R ⁵ and R ⁶ are each independently selected from the group consisting of H, C ₁ -C ₆ alkyl groups and C ₁ -C ₆ alkoxy groups, R ⁷ is selected from the group consisting of a single bond and a C ₁ -C ₁₀ alkylene group, X ¹ and X ² are each independently selected from the group consisting of a single bond, O, C ₁ -C ₆ alkyl and C ₁ -C ₆ alkoxy N is an integer of 1 to 20, and m is an integer of 1 to 20.

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로 이루어진 군으로부터 선택된다. 더욱더 바람직하게는, 상기 R₂는 H 또는 CR⁵ ₂=CR⁶-COO-R⁷-이되, R⁵ 및 R⁶은 각각 독립적으로 H 또는 C₁-C₃ 알킬기이고, R⁷은 단일결합 또는 C₁-C₆ 알킬렌기일 수 있다.Also preferred ranges for R &lt; ₂ &gt; are as described above with respect to the electrodes herein. More preferably, R &lt; _{2 &gt;} is

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And

&Lt; / RTI &gt; More preferably, R ₂ is H or CR ⁵ ₂ ═CR ⁶ -COO-R ⁷ -, wherein R ⁵ and R ⁶ are each independently H or a C ₁ -C ₃ alkyl group, R ⁷ is a single bond or C ₁ -C ₆ alkylene group.

The acrylate monomer may be used in admixture with other polymers, for example, after being coated with a predetermined thickener and then cured. A thickening agent such as carboxy methyl cellulose, hydroxy ethyl cellulose, polyvinyl alcohol, or polyvinylacrylate, which can increase the viscosity, Thus, the coating can be facilitated and the sealing property can be improved.

The second binder may be about 0.1 to about 20 parts by weight based on 100 parts by weight of the second solvent. When the second binder belongs to the above-mentioned range, it is possible to improve the adhesion with the separator and the like, and by increasing the ionic conductivity, the rate characteristics and the cycle life of the battery including the electrode according to the present invention can be improved.

The second solvent is as hereinbefore described with respect to the first solvent in terms of its type and the reason for selection.

The thickness of the binder layer may be from about 0.1 to about 1 mu m. When the thickness of the binder layer falls within the above-mentioned range, the ion conductivity can be improved while maintaining the adhesion with the separation membrane or the like.

The binder layer may have several patterned holes or may have a plurality of band shapes. In addition, the area of the binder layer contacting the electrode may be about 50 to about 70% of the area of one surface of the electrode. When the binder layer having the patterned outer appearance is provided in the above-described area range, the ion conductivity will be greatly improved while keeping the bonding strength between the porous separator and the electrode to be contacted to be excellent.

Further, the acrylate-based monomer may be crosslinked. Methods of achieving such cross-linking may include curing by light, heat, E-beam, gamma ray, UV, and the like. The acrylate monomer is a material having a low viscosity and exhibiting a high intermolecular bonding force when crosslinked by a chemical reaction upon irradiation with UV or the like. The acrylate-based monomer is easily applied to the site, and there is no flow even after such application, so that an optimal sealing property improving effect can be obtained.

For example, the applied second binder may be cured by UV irradiation to form a binder layer. Here, the second binder can be cured by irradiating light at a temperature of about 20 to about 30 DEG C for about 1,000 to about 2,000 mW / cm &lt; 2 &gt; for about 5 to about 300 seconds. In the case where a condensate or an adduct is generated during the curing reaction, it is preferable that curing proceeds under reduced pressure, and a pressure of about 0.01 torr to about 500 torr is suitable. It is difficult to realize the pressure reducing condition of about 0.01 torr or less under the mass production condition, and it is not easy to remove the condensate or the side reaction product under the pressure condition of about 500 torr or more.

Therefore, the method of manufacturing an electrode according to an embodiment of the present invention may further include a step of curing the binder layer by the curing method described above.

In addition, the binder layer may further include a curable initiator. The curable initiator is selected from the group consisting of benzophenone, acetophenone, chloroacetophenone, diethoxyacetophenone (DEAP), benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether , Benzoin benzoic acid, benzoin methyl benzoate, benzoin dimethyl ketal, 2,4-diethyl thioxanthone, benzyl diphenylsulfide, tetramethylurammonosulfide, azobisisobutyronitrile, benzyl, dibenzyl, Benzyl-2-dimethylamino-1- (4-morpholinophenyl) - (4-morpholinophenyl) 2-methyl-1-phenylpropan-1-one, 1 - [(2-hydroxyphenyl) 2-methyl-1-propane-1-one, phenylbis (2,4,6-trimethylbenzoyl) phosphine oxide, 1-phenyl -2-heptane Hydroxy-2-methyl propaneone (HMPP), alpha -amino acetophenone, thioxanthone and 2-ethyl anthraquinone (1-phenyl- 2-ethyl Anthraquinone (2-ETAQ).

The content of the initiator may be about 0.01 to about 10 parts by weight based on 100 parts by weight of the second binder. When the content of the initiator falls within the above-mentioned range, an effective and quick curing reaction occurs, and storage stability, adhesion and curing properties can be improved.

The binder layer may further include a lithium salt, and the content of the lithium salt may be about 10 to about 30 parts by weight based on 100 parts by weight of the solid of the binder layer.

The electrode according to one embodiment of the present invention thus manufactured can be useful as an electrode of an electrochemical device, that is, as an anode or a cathode.

The electrochemical device may be manufactured according to a conventional method known in the art, and examples thereof may be manufactured by assembling the above-described electrodes, that is, a separator between the positive electrode and the negative electrode, followed by injecting an electrolyte solution.

The electrolyte solution that can be used in the present invention is a salt having a structure such as A ⁺ B ^- , wherein A ⁺ includes ions consisting of alkali metal cations such as Li ⁺ , Na ⁺ , K ⁺ , or combinations thereof, and B ^{- _{6 -, BF 4 -, Cl}} -, Br -, I -, ClO 4 -, AsF 6 -, CH 3 CO 2 -, CF 3 SO 3 -, N (CF 3 SO 2) 2 -, C (CF 2 SO _{2) 3} ^- anion, or a salt containing an ion composed of a combination of propylene carbonate (PC) such as, ethylene carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), di-propyl carbonate (DPC ), Dimethyl sulfoxide, acetonitrile, dimethoxyethane, diethoxyethane, tetrahydrofuran, N-methyl-2-pyrrolidone (NMP), ethylmethyl carbonate (EMC), gamma-butyrolactone Butyrolactone), or a mixture thereof, but the present invention is not limited thereto.

The electrolyte may be injected at an appropriate stage of the battery manufacturing process, depending on the manufacturing process and required properties of the final product. That is, it can be applied before assembling the cell or at the final stage of assembling the cell.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to examples. However, the embodiments according to the present invention can be modified into various other forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art.

Example 1

Manufacture of electrodes

90 parts by weight of lithium cobalt composite oxide as cathode active material particles and 5 parts by weight of PVDF as a first binder were added to 40 parts by weight of N-methyl-2-pyrrolidone (NMP) as a first solvent to prepare a cathode active material slurry. The positive electrode active material slurry was applied to an aluminum (Al) thin film having a thickness of 100 탆 as a positive electrode collector and dried.

The current collector coated with the positive electrode active material layer was impregnated with a binder solution in which a second binder solution was dissolved in acetone as a second solvent and dried under vacuum at room temperature. Subsequently, a final cathode was prepared by thermosetting in an oven under conditions of 90 deg. C / 10 min.

A final negative electrode was prepared similarly to the preparation of the positive electrode, except that 95 parts by weight of carbon powder was used as the negative electrode active material particles and a copper (Cu) thin film having a thickness of 90 占 퐉 was used as the negative electrode collector.

Manufacture of lithium secondary battery

(Ethylene carbonate (EC) / propylene carbonate (PC) / diethyl carbonate (DEC) = 1/2) was prepared by interposing a polyethylene porous separator (porosity of 45%) having a thickness of 18 탆 between the positive electrode and the negative electrode prepared by the above- 3/2/5 (by volume), and 1 mole of lithium hexafluorophosphate (LiPF ₆ )) to prepare a lithium secondary battery.

Comparative Example 1

A lithium secondary battery was produced in the same manner as in Example 1 except that PVD was used as the second binder in the step of manufacturing the single electrode.

Claims (33)

An electrode active material layer coated on the current collector and including a first binder, electrode active material particles and pores between the electrode active material particles; And
A binder layer formed on at least one surface of the surface of the electrode active material particle and on one surface of the electrode active material layer and including a second binder including an acrylate monomer represented by the following formula
&Lt; / RTI &gt;
[Chemical Formula 1]

In this formula,
R ¹ and R ⁴ are each independently selected from the group consisting of H, C ₁ -C ₆ alkyl groups and C ₁ -C ₆ alkoxy groups,
R ² is a phosphate group; A substituted or unsubstituted trivalent C ₆ -C ₂₄ arylene group and a substituted or unsubstituted trivalent C ₃ -C ₂₄ heteroarylene group,
When they have a cyclic structure, they may exist as a single cyclic structure, or two or more may be bonded to each other to form a condensed cyclic structure; Or two or more ring structures is a single bond, O, S, C (= O), CH (OH), S (= O) 2, Si (CH 3) 2, (CH 2) p (p is 1 to 10 integer), and _{C (CH 3) 2, C} (= O) and from the group consisting of NH are connected with the selected functional group, R ³ is H, C ₁ -C ₆ alkyl, C ₁ -C ₆ alkoxy group and CR ⁵ ₂ = CR ⁶ -COO-R ⁷ -,
R ⁵ and R ⁶ are each independently selected from the group consisting of H, C ₁ -C ₆ alkyl groups and C ₁ -C ₆ alkoxy groups, R ⁷ is selected from the group consisting of a single bond and a C ₁ -C ₁₀ alkylene group , ¹ and X ² are each independently selected from the group consisting of a single bond, O, C ₁ -C ₆ alkyl and C ₁ -C ₆ alkoxy, n is an integer from 1 to 20, and m is an integer from 1 to 20 to be.
The method according to claim 1,
Wherein R &lt; _{2 &gt;} is selected from the group consisting of:

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3. The method of claim 2,
Wherein R &lt; _{2 &gt;} is selected from the group consisting of:

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And

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The method of claim 3,
Wherein R ₂ is H or CR ⁵ ₂ = CR ⁶ -COO-R ⁷ -
R ⁵ and R ⁶ are each independently H or a C ₁ -C ₃ alkyl group,
R ⁷ has the electrode, it characterized in that a single bond or a C ₁ -C ₆ alkylene group. The method according to claim 1,
Wherein the acrylate monomer is crosslinked. The method according to claim 1,
Wherein the first binder is selected from the group consisting of polyvinylidene fluoride, polyvinyl alcohol, carboxymethylcellulose (CMC), starch, hydroxypropylcellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene, Wherein the electrode is selected from the group consisting of polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene butylene rubber and fluororubber. The method according to claim 1,
Wherein the thickness of the binder layer is 0.1 to 1 占 퐉. The method according to claim 1,
Wherein the binder layer has a plurality of patterned holes or a plurality of band shapes. The method according to claim 1,
Wherein the area of contact of the binder layer with the electrode is 50 to 70% of the area of one surface of the electrode. 10. An electrode according to any one of claims 1 to 9;
A porous separator formed on the electrode; And
And a second electrode formed on the porous separation membrane and opposite to the electrode. 11. The method of claim 10,
Wherein the porous separator further comprises a porous coating layer comprising inorganic particles and a third binder. 12. The method of claim 11,
Wherein the inorganic particles are selected from the group consisting of inorganic particles having a dielectric constant of 5 or more, inorganic particles having lithium ion transferring ability, and mixtures thereof. 12. The method of claim 11,
Wherein the third binder is selected from the group consisting of PVDF, polyacrylic acid, polyethylene glycol, PPG, ), Polymethyl methacrylate, polyacrylonitrile, polyvinylpyrrolidone, polyvinylacetate, polyethylene-co-vinyl acetate, But are not limited to, polyethylene oxide, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, cyanoethylpullulan, cyanoethylpolyvinyl alcohol cyanoethylpolyvinylalcohol, cyanoethyl cellulose, But are not limited to, cyanoethyl sucrose, pullulan, carboxyl methyl cellulose (CMC), acrylonitrile-styrene-butadiene copolymer, polyimide, A polyvinylidene fluoride, a polyacrylonitrile, and a styrene butadiene rubber (SBR), or a mixture of two or more thereof. An electrochemical device comprising at least one electrode assembly according to claim 10. 15. The method of claim 14,
Wherein the electrochemical device is a lithium secondary battery.
Forming an electrode active material layer by applying a slurry in which electrode active material particles are dispersed in a first binder solution in which a first binder is dissolved in a first solvent, and removing the first solvent from the slurry; And
A second binder solution obtained by dissolving a second binder containing an acrylate monomer represented by the following formula (1) in a second solvent is applied on the electrode active material layer, and the second solvent is removed from the second binder solution Forming a binder layer
A method for producing an electrode comprising:
Formula 1

In this formula,
R ¹ and R ⁴ are each independently selected from the group consisting of H, C ₁ -C ₆ alkyl groups and C ₁ -C ₆ alkoxy groups,
R ² is a phosphate group; A substituted or unsubstituted trivalent C ₆ -C ₂₄ arylene group and a substituted or unsubstituted trivalent C ₃ -C ₂₄ heteroarylene group,
When they have a cyclic structure, they may exist as a single cyclic structure, or two or more may be bonded to each other to form a condensed cyclic structure; Or two or more ring structures is a single bond, O, S, C (= O), CH (OH), S (= O) 2, Si (CH 3) 2, (CH 2) p (p is 1 to 10 integer), and _{C (CH 3) 2, C} (= O) and from the group consisting of NH are connected with the selected functional group,
R ³ is selected from the group consisting of H, C ₁ -C ₆ alkyl groups, C ₁ -C ₆ alkoxy groups and CR ⁵ ₂ = CR ⁶ -COO-R ⁷ -, R ⁵ and R ⁶ are each independently H, C ₁ -C ₆ alkyl group and C ₁ -C ₆ alkoxy group, R ⁷ is selected from the group consisting of a single bond and a C ₁ -C ₁₀ alkylene group, X ¹ and X ² are each independently a single bond a bond, O, C ₁ -C ₆ alkyl and C ₁ -C ₆ is selected from the group consisting of alkoxy, n is an integer from 1 to 20, m is an integer from 1 to 20.
17. The method of claim 16,
Wherein R &lt; _{2 &gt;} is selected from the group consisting of:

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17. The method of claim 16,
Wherein R &lt; _{2 &gt;} is selected from the group consisting of:

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And

. 19. The method of claim 18,
Wherein R ₂ is H or CR ⁵ ₂ = CR ⁶ -COO-R ⁷ -
R ⁵ and R ⁶ are each independently H or a C ₁ -C ₃ alkyl group,
R ⁷ is a method of manufacturing an electrode, characterized in that a single bond or a C ₁ -C ₆ alkylene group. 17. The method of claim 16,
Wherein the second binder is 0.1 to 20 parts by weight based on 100 parts by weight of the second solvent. 17. The method of claim 16,
Wherein the first binder is selected from the group consisting of polyvinylidene fluoride, polyvinyl alcohol, carboxymethylcellulose (CMC), starch, hydroxypropylcellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene, Wherein the electrode is selected from the group consisting of polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene butylene rubber and fluororubber. 17. The method of claim 16,
Wherein the first solvent and the second solvent are each independently selected from the group consisting of acetone, tetrahydrofuran, methylene chloride, chloroform, dimethylformamide, Wherein the mixture is one or a mixture of two or more selected from the group consisting of N-methyl-2-pyrrolidone (NMP), cyclohexane and water. 17. The method of claim 16,
Wherein the thickness of the binder layer is 0.1 to 1 占 퐉. 17. The method of claim 16,
Wherein the binder layer has a plurality of patterned holes or has a plurality of band shapes. 17. The method of claim 16,
Wherein the area of contact of the binder layer with the electrode is 50 to 70% of the area of one surface of the electrode. 17. The method of claim 16,
Wherein the acrylate monomer is crosslinked. 17. The method of claim 16,
Further comprising the step of curing the binder layer. 17. The method of claim 16,
Wherein the binder layer further comprises a curable initiator. 28. The method of claim 27,
Wherein the curable initiator is selected from the group consisting of benzophenone, acetophenone, chloroacetophenone, diethoxyacetophenone (DEAP), benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether , Benzoin benzoic acid, benzoin methyl benzoate, benzoin dimethyl ketal, 2,4-diethyl thioxanthone, benzyl diphenylsulfide, tetramethylurammonosulfide, azobisisobutyronitrile, benzyl, dibenzyl, Benzyl-2-dimethylamino-1- (4-morpholinophenyl) - (4-morpholinophenyl) 2-methyl-1-phenylpropan-1-one, 1 - [(2-hydroxyphenyl) 2-methyl-1-propane-1-one, phenylbis (2,4,6-trimethylbenzoyl) phosphine oxide, 1-phenyl -2-heptane Hydroxy-2-methyl propaneone (HMPP), alpha -amino acetophenone, thioxanthone and 2-ethyl anthraquinone (1-phenyl- 2-ethyl anthraquinone (2-ETAQ). 28. The method of claim 27,
Wherein the content of the initiator is 0.01 to 10 parts by weight based on 100 parts by weight of the second binder. 17. The method of claim 16,
Wherein the binder layer further comprises a lithium salt. 32. The method of claim 31,
Wherein the content of the lithium salt is 10 to 30 parts by weight based on 100 parts by weight of the solid of the binder layer. 32. An electrode manufactured by the method of manufacturing an electrode according to any one of claims 16 to 32.