Aqueous binder composition for electrodes, and method for producing the same.

Abstract

Disclosed is an aqueous binder composition comprising a cationic copolymer derived from at least one cationic monomer and at least one nonionic monomer. The disclosure also relates generally to an electrode composition comprising the binder composition, and to a method of fabricating an electrode, particularly an anode, using the binder composition.

Description

[Technical Field]

[0001] The processes, procedures, methods, products, results, and / or concepts of the currently disclosed and / or claimed inventions (collectively, the "Disclosure") generally relate to aqueous binder compositions for use in battery electrodes and methods for preparing the same. More specifically, but not limited to, the Disclosure relates to aqueous binder compositions comprising a cationic copolymer derived from at least one cationic monomer and at least one nonionic monomer. Furthermore, the Disclosure generally relates to electrode compositions comprising aqueous binder compositions and methods for preparing electrodes, particularly anodes, using aqueous binder compositions. [Background technology]

[0002] Lithium-ion batteries (LIBs) are used in a wide range of products, including medical devices, electric vehicles, airplanes, and, most notably, consumer products such as laptops, mobile phones, and cameras. Due to their high energy density, high operating voltage, and low self-discharge, lithium-ion batteries dominate the rechargeable battery market and continue to find new applications in developing industries and products.

[0003] Generally, a lithium-ion battery comprises an anode, a cathode, and an electrolyte material such as an organic solvent containing a lithium salt. More specifically, either the anode active material or the cathode active material is mixed with a binder and a solvent to form a paste or slurry, which is then coated onto a current collector such as aluminum or copper, dried, and a film is formed on the current collector to create the anode and cathode (collectively referred to as "electrodes"). The anode and cathode are then stacked and rolled together, and placed in a pressurized casing containing the electrolyte material, and all of these are combined to form a lithium-ion battery. [Overview of the project]

[0004] When fabricating electrodes, it is crucial to select a binder with sufficient adhesion and chemical properties to maintain contact with the current collector, even when the coated film is handled to fit into a pressurized battery casing. Since the film contains electrode active material, failure to maintain sufficient contact with the current collector can significantly impair the electrochemical properties of the battery. Therefore, the binder plays a vital role in determining the performance of lithium-ion batteries. Existing binders such as styrene-butadiene rubber / carboxymethylcellulose have very low adhesion to the active material. As the applications of lithium-ion batteries shift from small electronic devices to large electronic devices such as electric vehicles and power storage, there is a need for anode materials such as silicon and related materials that offer superior performance, including high safety, long cycle life, high energy density, and high power. Existing binders cannot meet these requirements. Therefore, it is necessary to develop new aqueous binder compositions to meet these requirements. [Modes for carrying out the invention]

[0005] Before describing in detail at least one embodiment of this disclosure, it should be understood that in its application, this disclosure is not limited to the structural and arrangement details of components or processes, or the details of methodology, as revealed in the following description or shown in the drawings. Other embodiments of this disclosure are possible, or it can be carried out or implemented in various ways. It should also be understood that the expressions and terms used herein are for illustrative purposes only and should not be considered limiting.

[0006] Unless otherwise defined herein, technical terms used in connection with this disclosure have meanings generally understood by those skilled in the art. Furthermore, unless specifically required by context, singular terms include plurals, and plural terms include singulars.

[0007] All patents, published patent applications, and non-patent publications referenced herein represent the level of skill of a person skilled in the art relating to this disclosure. All patents, published patent applications, and non-patent publications referenced in any part of this application are expressly incorporated herein by reference in whole to the same extent as when individual patents or publications are specifically and individually indicated to be incorporated by reference.

[0008] All articles and / or methods disclosed herein can be manufactured and performed without undue experimentation in light of this disclosure. While the articles and methods disclosed herein are described in terms of preferred embodiments, it will be apparent to those skilled in the art that changes can be applied to the articles and / or methods, and to the steps or sequence of steps of the methods described herein, without departing from the concepts, intent and scope of this disclosure. All such similar substitutes and modifications, which are apparent to those skilled in the art, are considered to be within the intent, scope and concept of this disclosure.

[0009] When used in accordance with this disclosure, the following terms should be understood to have the following meanings unless otherwise specified.

[0010] When used in combination with the term "comprising," the use of the phrases "a" or "an" may mean "one," but is not inconsistent with the meanings of "one or more," "at least one," and "one or more than one." The use of the term "or" is used to mean "and / or" unless explicitly stated to refer to the alternatives only when the alternatives are mutually exclusive; however, this disclosure has definitions that refer only to alternatives and "and / or." Throughout this application, the term "about" is used to indicate that a value includes inherent variability due to errors in the quantitative instruments and methods employed to determine that value, or variability present among the test subjects. For example, when the term "approximately" is used, although not limited to, the specified value may exhibit a variation of plus or minus 12 percent, 11 percent, 10 percent, 9 percent, 8 percent, 7 percent, 6 percent, 5 percent, 4 percent, 3 percent, 2 percent, or 1 percent. The use of the term "at least one (type)" is understood to include not just one (type), but any one or more quantities, including, but not limited to, 1, 2, 3, 4, 5, 10, 15, 20, 30, 40, 50, 100, etc. The term "at least one (type)" can be extended to 100, 1000, or more, depending on the term it is attached to. Furthermore, the quantity 100 / 1000 is not considered restrictive because satisfactory results can be obtained at the lower or upper limit. Furthermore, the use of the term "at least one of X, Y, and Z" is understood to include not only X alone, Y alone, and Z alone, but any combination of X, Y, and Z. The use of serial numbering terms (i.e., "1st," "2nd," "3rd," "4th," etc.) is solely for the purpose of distinguishing two or more items and, unless otherwise specified, does not imply any order, hierarchy, importance, or additional hierarchy of any item relative to another item.

[0011] As used herein, the terms “comprising” (and any form of “comprising,” e.g., “comprise” and “comprises,” etc.), “having” (and any form of “having,” e.g., “have” and “has,” etc.), “including” (and any form of “containing,” e.g., “includes” and “include,” etc.), or “containing” (and any form of “containing,” e.g., “contains” and “contain,” etc.) are inclusive or open-ended and do not exclude any additional elements or steps of the method that are not enumerated. As used herein, the term “or this combination” refers to all permutations and combinations of the items preceding that term. For example, “A, B, C, or any combination thereof” is intended to include A, B, C, AB, AC, BC, or ABC, and, where permutations are important in a particular context, at least one of BA, CA, CB, CBA, BCA, ACB, BAC, or CAB. Following this example, combinations containing repetitions of one or more items or terms are explicitly included, such as BB, AAA, MB, BBC, AAABCCCC, CBBAAA, CABABB, etc. A person skilled in the art will understand that, unless otherwise clearly indicated by the context, there is typically no limit to the number of items or terms in any combination.

[0012] As used herein, the term "copolymer" refers to a polymer formed by the polymerization reaction of at least two different monomers.

[0013] As used herein, the term "copolymerization" includes all types of copolymerization, such as random, graft, and block copolymerization. Generally, copolymers used in accordance with this disclosure can be prepared according to any suitable catalytic polymerization process, including solution copolymerization, slurry copolymerization, gas-phase copolymerization, and high-pressure copolymerization processes.

[0014] As used herein, the terms "aqueous" or "aqueous solvent" include water and mixtures of water with one or more water-miscible solvents.

[0015] This disclosure encompasses aqueous binder compositions for the manufacture of lithium-ion battery electrodes. In particular, the binder compositions include cationic copolymers, which include acrylamidopropyltrimethylammonium chloride (APTAC), methacrylamidopropyltrimethylammonium chloride (MAPTAC), acryloyloxyethyltrimethylammonium chloride (AETAC), methacryloyloxyethyltrimethylammonium chloride (MAETAC), N-[2-(acryloyloxy)ethyl]-N-benzyldimethylammonium chloride, acryloyloxyethyltrimethylammonium chloride, and 3-(methacryloylamino)propyl-lauryl-dimethylammonium chloride. It can be derived from at least one cationic monomer selected from the group consisting of MAP, L, D, MAC, and at least one nonionic monomer selected from the group consisting of acrylamide (AM), dimethylacrylamide, diethylacrylamide, hydroxyethylacrylamide, dimethylaminopropylacrylamide, dimethylaminopropyl methacrylamide, vinyl acetate (VA), vinylformamide, acrylonitrile (AN), acrylate, ethylhexyl acrylate, carboxyethyl acrylate, dimethylaminoethyl methacrylate, and diethylaminoethyl methacrylate.

[0016] The copolymer may have a weight-average molecular weight in the range of approximately 5,000 to approximately 2,500,000 daltons, or approximately 8,000 to approximately 2,000,000, or approximately 100,000 to approximately 1,500,000 daltons, or approximately 300,000 to approximately 1,000,000 daltons.

[0017] The aqueous binder composition may further contain at least one anionic polymer. Examples of anionic polymers, but are not limited to, carboxymethylcellulose; carboxymethyl hydroxyethylcellulose; carboxyalkyl guar such as carboxymethyl guar, and guar derivatives including carboxyalkyl hydroxypropyl guar such as carboxymethyl hydroxyethyl guar and carboxymethyl hydroxypropyl guar; polyacrylic acid; poly(acrylamide-2-methylpropanesulfonic acid); copolymers derived from acrylamide-2-methylpropane and acrylamide, acrylonitrile, acrylic acid, or acrylate; alginates; chitosan; carrageenan; and tetrapolymers derived from 2-acrylamide-2-methyl-1-propanesulfonic acid (AMPS), acrylic acid, acrylamide, and 3-aloyloxypropylsulfonic acid.

[0018] Furthermore, this disclosure relates to an aqueous slurry composition comprising an aqueous binder composition, an electrode active material, and a conductive agent. In one non-limiting embodiment, the aqueous slurry composition may further comprise a dispersant and an aqueous solvent. The aqueous binder composition is the same as described above.

[0019] The electrode active material can be an anode active material. The anode active material can be a silicon-containing electrode active material, or a metal-containing material such as Sn or Ti. In one non-limiting embodiment, the silicon-containing material can be silicon, silicon-graphene, silicon-carbon nanotubes, silicon-based alloys, and combinations thereof.

[0020] Furthermore, the anode active material may include silicon dioxide or carbon-coated silicon dioxide. The silicon dioxide may, for example, be of the formula SiO₂, although this is not particularly limited. x It can be expressed as (where 1 ≤ x < 2). Carbon-coated silicon oxide is given by the formula SiO xIt can be expressed as C (where 1 ≤ x < 2), and furthermore, the weight ratio of carbon to silicon oxide can be at least 50:50, or in the range of approximately 70:30 to approximately 99:1, or in the range of approximately 80:10 to approximately 95:5, or in the range of approximately 90:10 to approximately 95:5.

[0021] In one non-limiting embodiment, the anode active material may include a silicon-graphene composition. For example, the XG-SIG® silicon-graphene nanocomposite material, available from XG Sciences, Inc. (Lansing, Michigan), can be used in this disclosure. In other non-limiting embodiments, the anode active material may include silicon alloys, e.g., silicon-titanium-nickel alloys (STM), and / or mixtures of silicon alloys and graphite. More specifically, the anode active material may include a mixture of silicon alloys and graphite, where the silicon alloy is present in an amount ranging from about 30 to 50% by weight, or about 35 to about 45% by weight, or about 37.5 to about 42.5% by weight, and the graphite is present in an amount ranging from about 50 to about 70% by weight, or about 55 to about 65% by weight, or about 57.5 to about 62.5% by weight.

[0022] The electrode active material can be the cathode active material. The cathode active material may contain a lithium-containing transition metal oxide, consist of a lithium-containing transition metal oxide, or be any material that is essentially a lithium-containing transition metal oxide. In one non-limiting embodiment, the cathode active material can be selected from the group consisting of lithium iron phosphate (LiFePO4), lithium cobalt oxide (LiCoO2), lithium nickel oxide (LiNiO2), lithium nickel cobalt aluminate (LiNiCoAlO2), lithium nickel manganese cobalt oxide (LiNiMnCoO2), lithium manganese oxide (LiMn2O4), and combinations thereof.

[0023] In other non-limiting embodiments, the cathode active material can be doped with elements, including but not limited to boron, magnesium, aluminum, titanium, chromium, iron, zirconium, copper, zinc, gallium, yttrium, fluoride, and combinations thereof. Further, a thin coating material can be applied to the surface of the cathode active material, including but not limited to ZnO, In2O3, SnO2, Y2O3, La2O3, Li2TiO3, CaTiO3, BaTiO3, SrO, and combinations thereof.

[0024] The conductive agent can be selected from carbon-based conductive agents, graphite-based conductive agents, metal-based conductive agents, and metal compound-based conductive agents, but is not particularly limited thereto.

[0025] The carbon-based conductive agent can be selected from Super P carbon black (commercially available from Imerys Graphite & Carbon Switzerland SA), Ketjen black, Denka black, acetylene black, carbon black, thermal black, or channel black. The graphite-based conductive agent can be TIMREX (registered trademark) graphite grade such as KS6 or KS15 commercially available from Imerys Graphite & Carbon Switzerland SA. The carbon nanotube (CNT) can be LB 100 or LB 200 series available from Cnano Technology Limited (Sunnyvale, California). The metal or metal compound-based conductive agent can be selected from tin, tin oxide, or tin phosphate (SnPO4). The amount of the conductive agent in the coating layer can be in the range of 0.1 to 20 wt%, or 0.5 to 10 wt%, or 1 to 5 wt% based on the total weight of the slurry composition.

[0026] The dispersant is a polyacrylate-based resin; polyethylene oxide; (EO) l (PO) m (EO) lA block polymer represented by (where EO represents ethylene oxide, PO represents propylene oxide, and l and m are in the numerical range of 1 to 500); polyvinyl chloride (PVC); polyvinyl pyrrolidone (PVP); polyacrylic acid (PAA); acrylonitrile / butadiene / styrene (ABS) polymer; acrylonitrile / styrene / acrylic ester (ASA) polymer; a mixture of an ABS polymer and propylene carbonate; a styrene / acrylonitrile (SAN) copolymer; or a methyl methacrylate / acrylonitrile / butadiene / styrene (MABS) polymer can be selected. The amount of the dispersant can be varied within the range of 0.1 to 20% by weight of the conductive agent. In the presence of the dispersant, the conductive agent can be uniformly dispersed.

[0027] The aqueous solvent can be water and / or a water-soluble solvent. The solvent is completely dissolved in water. The slurry of the present disclosure has good stability, and the slurry can remain visually in the solution for at least 24 hours, or at least 3 days, or at least 5 days. In one embodiment, the above aqueous slurry composition has a Brookfield viscosity in the range of about 1,000 mPa·s to about 15,000 mPa·s, or in the range of about 4,000 mPa·s to about 11,000 mPa·s, or in the range of about 5,500 mPa·s to about 8,500 mPa·s at a shear rate in the range of about 1 s -1 to about 40 s -1 at 25°C.

[0028] The present disclosure includes an electrode comprising, consisting of, or essentially consisting of an aqueous slurry composition as described above, and a current collector. The aqueous slurry composition is coated on the surface of the current collector to form a film. The electrode active material is present in the film in the range of about 70 to about 99% by weight, or about 80 to about 95% by weight, or about 85 to about 95% by mass, the conductive carbon is present in the range of about 0.5 to about 15% by weight, or about 2.5 to about 10% by weight, or about 1 to about 4% by weight, and the binder composition is present in the film in the range of about 0.5 to about 15% by weight, or about 2.5 to about 10% by weight, or about 4 to about 11% by weight.

[0029] The current collector may include any material that functions as an electrical conductor for either the anode or the cathode active material. The current collector can be made of a material selected from the group consisting of aluminum, carbon, copper, stainless steel, nickel, zinc, silver, and combinations thereof. In one non-limiting embodiment, the anode current collector includes copper foil. In another non-limiting embodiment, the cathode current collector includes aluminum foil.

[0030] Furthermore, this disclosure includes a method for manufacturing an electrode for a lithium-ion battery, comprising the steps of (1) combining an aqueous binder composition, an electrode active material, a conductive agent, an optional dispersant, and an aqueous solvent to form an aqueous slurry composition; (2) applying the aqueous slurry composition to a current collector to form a coated current collector containing a slurry layer on the current collector; and (3) drying the slurry layer on the coated current collector to form a film on the current collector, wherein the film and the current collector constitute the electrode. The aqueous binder composition, electrode active material, conductive agent, dispersant, and aqueous solvent are the same as those described above.

[0031] In one non-limiting embodiment, step (3) of drying the slurry on the current collector includes heating the coated current collector at a temperature in the range of about 80 to about 175°C, or 100 to about 150°C, for a time in the range of about 0.5 hours to about 3 hours, or about 1 hour to about 2 hours.

[0032] The dried film of the electrode has a thickness in the range of approximately 20 μm to 150 μm, approximately 30 μm to 100 μm, or approximately 30 μm to 70 μm.

[0033] The above film can bond to the surface of the above current collector to form a bond. In one embodiment, the adhesion strength of the bond is measured by the 90-degree peel adhesion test described below and is at least 0.5 gf / mm, or at least 0.7 gf / mm, or at least 1.0 gf / mm. [Examples]

[0034] <Preparation of copolymers derived from acrylamide methylpropanesulfonic acid-acrylamide (AMPS-AM)> Polymerization was carried out in a 1 L four-necked glass reactor equipped with a reflex condenser, a mechanical stirrer, and a nitrogen inlet gas section. 137.2 g of AMPS sodium salt solution (15 mol%), 120 g of AM (85 mol%), and 350 g of DI water were mixed to form a mixture under nitrogen. This mixture was added to the reactor and sparged with nitrogen for approximately 15 minutes. Based on the total weight of the monomers, 0.2 wt% Vazo-50 was dissolved in water / ethanol (1:1 wt ratio) to prepare a Vazo-50 solution. The reactor was heated to approximately 55-60°C. Polymerization was initiated by adding the Vazo-50 solution and continued for approximately 6 hours. Vazo-50 solution was added to the reactor at 1, 2, 3, 4, and 6 hours. The temperature was maintained at approximately 50-55°C for 6 hours. Subsequently, the reactor temperature was raised to approximately 65-70°C, and the resulting viscous material was stirred for approximately 10-16 hours. Finally, the contents of the reactor were removed, and the material was dried under a vacuum of 3-5 mmHg at approximately 65°C for approximately 5-7 hours. The resulting solid was then pulverized into a powder for use as the anionic polymer (AMPS-AM) described later.

[0035] <Preparation of silicon slurry for viscosity and adhesion testing> Slurries were prepared using the components listed in Table 1. Regarding the anode active materials listed in Table 1, 650 mAh / g SiO represents a powder mixture of graphite and silicon dioxide commercially available from BTR Energy Materials Co., LTD (Shenzhen, China). 680 mAh / g SiO represents a mixture of graphite (commercially available from BTR Energy Materials Co., LTD) and SiO. x This represents a powder mixture (commercially available from Osaka Titanium Technologies Co., Ltd. (Amagasaki, Hyogo Prefecture, Japan)) with a weight ratio of 75:25 (graphite to silicon dioxide) and an initial capacity of approximately 350 mAh / g. The conductive carbon C-NERGY® Super C65 (commercially available from Imerys Graphite & Carbon, Bodio, Switzerland) was used as the conductive agent listed in Table 1. The content of each component is shown based on the total weight of the slurry.

[0036] [Table 1]

[0037] N-Hance (trademark) SP100: Acrylamidopropyltrimonium Chloride / Acrylamide Copolymer, commercially available from Ashland LLC. N-DurHance® AA200: A highly charged homopolymer of (3-acrylamidopropyl)trimethylammonium chloride, commercially available from Ashland LLC. Prasetol® 644BC: Acrylamidopropyltrimonium Chloride / Acrylamide Copolymer, commercially available from Solenes LLC. Prasetol® 611BC: Acrylamidopropyltrimonium Chloride / Acrylamide Copolymer, commercially available from Solenes LLC. Prasetol® 610BC: Acrylamidopropyltrimonium Chloride / Acrylamide Copolymer, commercially available from Solenes LLC. Prasetol® 852BC: Acrylamidopropyltrimonium Chloride / Acrylamide Copolymer, commercially available from Solenes LLC. N-Hance (trademark) 4572: Guar and guar derivatives, commercially available from Ashland LLC. N-Hance (trademark) 3215: Guar hydroxypropyltrimonium chloride, commercially available from Ashland LLC. XxtraDura® FLA 3766: Fluid loss additive, commercially available from Ashland LLC. CMC 7LF: Aqualon® Carboxymethylcellulose Sodium, commercially available from Ashland LLC. CMC 7HO: Blanose (trademark) sodium carboxymethyl cellulose, commercially available from Ashland LLC CMC MAC 350: Sunrose (registered trademark) carboxymethyl cellulose, commercially available from Nippon Paper Industries Co., Ltd. (Japan Head Office, Japan) * Those containing 1.3% by weight of Zeon (registered trademark) BM-480B: styrene-butadiene latex, commercially available from Nippon Zeon Co., Ltd. (Tokyo, Japan)

[0038] <Rheology measurement of slurry> The viscosities of the slurry compositions listed in Table 1 were measured at 3 rpm and 30 rpm using Spindle 4 with a Brookfield (registered trademark) viscometer manufactured by Brookfield Engineering Laboratories, Inc. (Middleboro, Massachusetts). Immediately after mixing and 3 days after mixing, the viscosity was measured directly in a 17 mL vial. The results are listed in Table 2. Also, the stability of the slurry is shown in Table 2.

[0039]

Table 2

[0040] <Measurement of adhesion> The adhesion was measured by performing a 90-degree peel test on the electrode formed by coating and drying the slurry composition on a copper current collector. The 90-degree peel test was performed using a fixture for peel test manufactured by Instron (registered trademark) (Norwood, Massachusetts). The electrodes were tested at a load of 2.5 - 3.5 mg / cm 2 and a load of 4.0 - 5.0 mg / cm 2 . Each electrode sample was attached to a stainless steel plate using 3M (registered trademark) double-sided Scotch tape manufactured by 3M Corporation (St. Paul, Minnesota), and then the film attached to the Scotch tape was peeled off at a speed of 1 foot / minute with an Instron (registered trademark) device, and the force required to peel the film from the current collector with the Instron (registered trademark) device during that time was measured. The results are listed in Table 3.

[0041] Table 3

Claims

1. At least one cationic monomer selected from the group consisting of acrylamidopropyltrimethylammonium chloride (APTAC), methacrylamidopropyltrimethylammonium chloride (MAPTAC), acryloyloxyethyltrimethylammonium chloride (AETAC), methacryloyloxyethyltrimethylammonium chloride (MAETAC), N-[2-(acryloyloxy)ethyl]-N-benzyldimethylammonium chloride, acryloyloxyethyltrimethylammonium chloride, and 3-(methacryloylamino)propyl-lauryl-dimethylammonium chloride (MAPLDMAC), and acrylic An aqueous binder composition for lithium-ion battery electrodes comprising a cationic copolymer derived from at least one nonionic monomer selected from the group consisting of luamide (AM), dimethylacrylamide, diethylacrylamide, hydroxyethylacrylamide, dimethylaminopropylacrylamide, dimethylaminopropyl methacrylamide, vinyl acetate (VA), vinylformamide, acrylonitrile (AN), acrylate, ethylhexyl acrylate, carboxyethyl acrylate, dimethylaminoethyl methacrylate, and diethylaminoethyl methacrylate, an electrode active material, a conductive agent, a dispersant, and an aqueous solvent, The cationic copolymer has a weight-average molecular weight in the range of 5,000 to 1,000,000 daltons. The electrode active material comprises one or more chemical elements selected from the group consisting of Si, Sn, and Ti. The conductive agent is selected from the group consisting of carbon-based conductive agents, graphite-based conductive agents, metal-based conductive agents, and metal compound-based conductive agents. An aqueous slurry composition having a Brookfield viscosity of 3430–7000 mPa·s at a shear rate of 30 rpm and 25°C three days after mixing.

2. The aqueous slurry composition according to claim 1, wherein the aqueous binder composition further comprises an anionic polymer selected from the group consisting of carboxymethylcellulose; guar derivatives; polyacrylic acid; poly(acrylamide-2-methylpropanesulfonic acid); copolymers derived from acrylamide-2-methylpropanesulfonic acid and acrylamide, acrylonitrile, acrylic acid, or acrylate; alginates; chitosan; carrageenan; and acrylamide methylpropyl sulfonate (AMPS) and tetrapolymers derived from acrylic acid, acrylamide, and 3-allyloxy-2-hydroxypropylsulfonic acid.

3. The Si-containing electrode active material is selected from the group consisting of SiOx / graphite, SiC, SiOx, SiOxC, Si-graphene, Si-based alloys, and combinations thereof. The aqueous slurry composition according to claim 1.

4. The aqueous slurry composition according to claim 1, wherein the aqueous binder composition is present in the film of the aqueous slurry composition on the surface of the current collector in an amount of 2.5 to 10% by weight, based on the total weight of the aqueous slurry composition.

5. The aqueous slurry composition according to claim 1, Current collector and, Electrodes for lithium-ion batteries, including those mentioned above.

6. The aqueous slurry composition is a film formed by coating the current collector, The aforementioned film has a thickness in the range of 20 μm to 150 μm. The electrode according to claim 5.

7. The electrode according to claim 5, wherein the current collector comprises a metal selected from the group consisting of aluminum, copper, and combinations thereof.

8. The electrode according to claim 5, which is an anode.

9. The electrode according to claim 5, wherein the surface of the film and the surface of the current collector are in close contact with each other with an adhesion strength of at least 0.5 gf / mm as measured by a 90-degree peel adhesion test.

10. A lithium-ion battery comprising an anode, a cathode, and an electrolyte, A lithium-ion battery wherein the anode is the electrode described in claim 5.

11. A method for manufacturing electrodes for lithium-ion batteries, A step of forming the aqueous slurry composition according to claim 1 by combining the aqueous binder composition, the electrode active material, the conductive agent, the dispersant, and the aqueous solvent, The steps include applying the aqueous slurry composition to a current collector to form a coated current collector containing a slurry layer on the current collector, The process includes drying the slurry layer on the coated current collector to form a film on the current collector, A method in which the film and the current collector constitute the electrode.

12. The method according to claim 11, wherein, based on the total weight of the aqueous slurry composition, the aqueous binder composition is present in the film of the aqueous slurry composition on the surface of the current collector in an amount of 2.5 to 10% by weight, and the electrode active material is present in the film of the aqueous slurry composition on the surface of the current collector in an amount of 80 to 95% by weight.

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