WO2017026474A1 - 非水電解質電池用バインダー組成物、並びにそれを用いた非水電解質電池用スラリー組成物、非水電解質電池負極、及び非水電解質電池 - Google Patents
非水電解質電池用バインダー組成物、並びにそれを用いた非水電解質電池用スラリー組成物、非水電解質電池負極、及び非水電解質電池 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/44—Preparation of metal salts or ammonium salts
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing atoms other than carbon or hydrogen
- C08L23/0869—Copolymers of ethene with unsaturated hydrocarbons containing atoms other than carbon or hydrogen with unsaturated acids, e.g. [meth]acrylic acid; with unsaturated esters, e.g. [meth]acrylic acid esters
- C08L23/0876—Salts thereof, i.e. ionomers
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- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
- C08L23/22—Copolymers of isobutene; Butyl rubber; Homopolymers or copolymers of other iso-olefins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/26—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers modified by chemical after-treatment
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/10—Homopolymers or copolymers of unsaturated ethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L35/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L35/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L35/02—Homopolymers or copolymers of esters
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a binder composition for a non-aqueous electrolyte battery, a slurry composition for a non-aqueous electrolyte battery using the binder composition, a non-aqueous electrolyte battery negative electrode, and a non-aqueous electrolyte battery.
- Lithium ion secondary batteries are frequently used as secondary batteries used for the power sources of these portable terminals. Since portable terminals are required to have more comfortable portability, miniaturization, thinning, weight reduction, and high performance have rapidly progressed, and have come to be used in various places. This trend continues today, and batteries used in mobile terminals are further required to be smaller, thinner, lighter, and higher in performance.
- a non-aqueous electrolyte battery such as a lithium ion secondary battery has a positive electrode and a negative electrode installed via a separator, and LiPF 6 , LiBF 4 LiTFSI (lithium (bistrifluoromethylsulfonylimide)), LiFSI (lithium (bisfluorosulfonylimide). )) And a lithium salt dissolved in an organic liquid such as ethylene carbonate in a container.
- the negative electrode and the positive electrode are usually obtained by dissolving or dispersing a binder and a thickener in water and mixing an active material, a conductive aid (conductivity imparting agent) and the like with this, Hereinafter, it may be simply formed as a mixed layer by coating the current collector on the current collector and drying the water. More specifically, for example, for the negative electrode, a carbonaceous material capable of occluding and releasing lithium ions, which is an active material, and, if necessary, acetylene black, a conductive auxiliary agent, are secondary to a current collector such as copper. They are bound together by a binder for battery electrodes. On the other hand, for the positive electrode, LiCoO 2 that is an active material and, if necessary, a conductive aid similar to that of the negative electrode are bound to a current collector such as aluminum using a secondary battery electrode binder. Is.
- diene rubbers such as styrene-butadiene rubber and acrylics such as polyacrylic acid have been used as binders for aqueous media (for example, Patent Documents 1 and 2).
- the thickener include methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropoxycellulose, carboxymethylcellulose sodium salt (CMC-Na), sodium polyacrylate, etc.
- CMC-Na is often used.
- diene rubbers such as styrene-butadiene rubber have low adhesion to metal collectors such as copper, and there is a problem that the amount used cannot be reduced to increase the adhesion between the collector and the electrode material. .
- the capacity maintenance rate is low due to weakness against heat generated during charging and discharging.
- polyacrylic acid soda exhibits higher adhesion than styrene-butadiene rubber, but has a problem that the electrode is easily cracked because the electric resistance is high and the electrode becomes harder and less tough.
- demands for extending the usage time of mobile devices and shortening charging time have increased, and there is an urgent need to improve battery capacity (low resistance), life (cycle characteristics), and charging speed (rate characteristics). In particular, it is an obstacle.
- the battery capacity is affected by the amount of active material, it is effective to suppress the amount of binder and thickener in order to increase the active material in a limited space of the battery.
- the rate characteristics are also affected by the ease of electron movement, it is effective to suppress the amount of binder and thickener that are non-conductive and prevent electron movement.
- the amount of the binder and the thickener is reduced, the binding property between the collector electrode and the electrode material and the active material in the electrode is lowered, and the durability (battery life) for long-term use is significantly reduced.
- the electrode becomes brittle. Thus, it has been difficult to improve battery characteristics such as battery capacity while maintaining the binding property between the collector electrode and the electrode material and maintaining the toughness as an electrode.
- the present invention has been made in view of the above-mentioned problems, and the battery characteristics in the nonaqueous electrolyte battery are obtained without impairing the function as the binder, that is, the binding property between the active materials and the collector electrode and the toughness as the electrode.
- the purpose is to improve.
- the present inventors have found that the above object can be achieved by using a binder composition for a nonaqueous electrolyte battery having the following constitution, and further studies are made based on this finding.
- the present invention was completed by overlapping.
- the binder composition for a non-aqueous electrolyte battery according to one aspect of the present invention (hereinafter also simply referred to as a binder composition) is an ⁇ -olefin-maleic acid copolymer obtained by copolymerizing an ⁇ -olefin and a maleic acid. It is characterized by containing a neutralized salt and a polyether.
- the binder composition for electrodes in the nonaqueous electrolyte battery provided with binding property and toughness can be obtained, and also the improvement of the battery characteristic of a nonaqueous electrolyte battery can be implement
- the binder composition for an electrode in the nonaqueous electrolyte battery of this embodiment contains a neutralized salt of an ⁇ -olefin-maleic acid copolymer obtained by copolymerizing an ⁇ -olefin and a maleic acid, and a polyether.
- an ⁇ -olefin-maleic acid copolymer obtained by copolymerizing an ⁇ -olefin and maleic acid is composed of a unit (A) based on ⁇ -olefin and a unit (B) based on maleic acid,
- a linear random copolymer having an average molecular weight of 10,000 to 500,000 is preferable.
- the unit (A) based on ⁇ -olefins is represented by the general formula —CH 2 CR 1 R 2 — (wherein R 1 and R 2 may be the same or different from each other, hydrogen Represents an alkyl or alkenyl group having 1 to 10 carbon atoms).
- the ⁇ -olefin used in this embodiment is a linear or branched olefin having a carbon-carbon unsaturated double bond at the ⁇ -position. In particular, olefins having 2 to 12 carbon atoms, particularly 2 to 8 carbon atoms are preferred.
- isobutylene is particularly preferable from the viewpoints of availability, polysynthesis, and product stability.
- the isobutylene includes a mixture containing isobutylene as a main component, for example, a BB fraction (C4 fraction).
- maleic anhydride maleic acid, maleic acid monoester (for example, methyl maleate, ethyl maleate, propyl maleate, phenyl maleate, etc.), maleic acid, as the unit (B) based on maleic acids
- Maleic anhydride derivatives such as diesters (eg dimethyl maleate, diethyl maleate, dipropyl maleate, diphenyl maleate etc.), maleic imides or N-substituted derivatives thereof (eg maleic imide, N-methylmaleimide, N N-substituted alkylmaleimides such as ethylmaleimide, N-propylmaleimide, Nn-butylmaleimide, Nt-butylmaleimide, N-cyclohexylmaleimide, N-phenylmaleimide, N-ethyl Phenyl male N-substituted alkylphenylmaleimide such as imide, or N-substi
- maleic anhydride is preferable from the viewpoint of availability, polymerization rate, and ease of molecular weight adjustment.
- These maleic acids may be used alone or in combination.
- Maleic acids are neutralized with alkali salts as described above, and the resulting carboxylic acid and carboxylic acid salt form a 1,2-dicarboxylic acid or salt form. This form has a function of capturing heavy metals eluted from the positive electrode.
- the content ratio of each structural unit in the copolymer of the present embodiment is preferably such that (A) / (B) is in the range of 1/1 to 1/3 in terms of molar ratio. This is because the advantages of hydrophilicity, water solubility, and affinity for metals and ions as a high molecular weight substance that dissolves in water can be obtained. Particularly, it is desirable that the molar ratio of (A) / (B) is 1/1 or a value close thereto, in which case the unit based on ⁇ -olefin, that is, —CH 2 CR 1 R 2 — A copolymer having a structure in which the units shown and units based on maleic acids are alternately repeated is obtained.
- the mixing ratio of ⁇ -olefins and maleic acids to obtain the copolymer of the present embodiment varies depending on the composition of the target copolymer, but ⁇ -olefin of 1 to 3 times the number of moles of maleic acids.
- Use of olefin is effective for increasing the reaction rate of maleic acids.
- the method for producing the copolymer of the present embodiment is not particularly limited, and for example, the copolymer can be obtained by radical polymerization.
- the polymerization catalyst used is an azo catalyst such as azobisisobutyronitrile, 1,1-azobiscyclohexane-1-carbonitrile, or an organic peroxide catalyst such as benzoyl peroxide or dicumyl peroxide. preferable.
- the amount of the polymerization catalyst used is required to be in the range of 0.1 to 5 mol%, preferably 0.5 to 3 mol% with respect to maleic acids.
- As a method for adding the polymerization catalyst and the monomer they may be added all at the beginning of the polymerization, but it is desirable to add them sequentially as the polymerization proceeds.
- the molecular weight can be appropriately adjusted mainly depending on the monomer concentration, the amount of catalyst used, and the polymerization temperature.
- the polymerization temperature is preferably 40 ° C.
- the polymerization time is usually preferably about 1 to 24 hours, more preferably 2 to 10 hours.
- the amount of the polymerization solvent used is preferably adjusted so that the concentration of the obtained copolymer is 5 to 40% by weight, more preferably 10 to 30% by weight.
- the copolymer of this embodiment usually has an average molecular weight of 10,000 to 500,000.
- a more preferred average molecular weight is 15,000 to 450,000.
- the average molecular weight of the copolymer of this embodiment is less than 10,000, the crystallinity is high and the adhesive strength between particles may be low.
- it exceeds 500,000 the solubility in water or a solvent becomes small, and it may precipitate easily.
- the average molecular weight of the copolymer of the present embodiment can be measured by, for example, a light scattering method or a viscosity method.
- the copolymer of this embodiment preferably has an intrinsic viscosity in the range of 0.05 to 1.5.
- the copolymer of this embodiment is usually obtained in the form of a powder having a grain size of about 16 to 60 mesh.
- the neutralized salt of a copolymer is a neutralized product in which active hydrogen of carbonyl acid generated from maleic acids reacts with a basic substance to form a salt.
- a basic substance containing a monovalent metal and / or ammonia is used as the basic substance from the viewpoint of binding properties as a binder. Is preferably used.
- the degree of neutralization is not particularly limited, but when used as a binder, considering the reactivity with the electrolytic solution, it is usually 0.3 to 1 mol per carboxylic acid produced from maleic acids. It is preferably in the range of 1 mole, and more preferably neutralized in the range of 0.4 to 1 mole. With such a neutralization degree, it is possible to adjust the pH of the binder composition of the present embodiment to a predetermined range, and further, there is an advantage that the acidity is low and the electrolytic solution decomposition is suppressed.
- the degree of neutralization can be determined by a method such as titration with a base, an infrared spectrum, or an NMR spectrum.
- titration with a base can be performed.
- the specific titration method is not particularly limited, but it can be dissolved in water with little impurities such as ion-exchanged water, and a basic substance such as lithium hydroxide, sodium hydroxide, potassium hydroxide, It can be carried out by neutralization.
- the indicator for the neutralization point is not particularly limited, but an indicator such as phenolphthalein whose pH is indicated by a base can be used.
- the amount of the basic substance containing monovalent metal and / or ammonia is not particularly limited and is appropriately selected depending on the purpose of use and the like, but usually in the maleic acid copolymer.
- the amount is preferably 0.1 to 2 moles per mole of maleic acid units. If it is such usage-amount, it will be possible to adjust pH of the binder composition of this embodiment to the predetermined range.
- the amount of the basic substance containing a monovalent metal is preferably 0.6 to 2.0 mol, more preferably 0.7 to 2. mol per mol of maleic acid unit in the maleic acid copolymer. When the amount is 0 mol, a water-soluble copolymer salt with little alkali residue can be obtained.
- the reaction of the ⁇ -olefin-maleic acid copolymer with a basic substance containing a monovalent metal and / or an amine such as ammonia can be carried out according to a conventional method, but is carried out in the presence of water, and ⁇ - A method for obtaining a neutralized olefin-maleic acid copolymer as an aqueous solution is simple and preferable.
- Examples of basic substances containing monovalent metals that can be used in the present embodiment include hydroxides of alkali metals such as sodium hydroxide, potassium hydroxide, and lithium hydroxide; alkali metals such as sodium carbonate and potassium carbonate. Carbonates of alkali metals such as sodium acetate and potassium acetate; phosphates of alkali metals such as trisodium phosphate, and the like.
- ammonia, lithium hydroxide, sodium hydroxide, and potassium hydroxide are preferable.
- ammonia or lithium hydroxide as a binder for a lithium ion secondary battery.
- the basic substance containing monovalent metal and / or ammonia may be used alone or in combination of two or more.
- a neutralized product of an ⁇ -olefin-maleic acid copolymer using a basic substance containing an alkali metal hydroxide such as sodium hydroxide as long as the battery performance is not adversely affected. May be prepared.
- the binder composition of the present embodiment further contains polyethers.
- polyethers By containing polyethers, toughness can be imparted to the binder composition.
- polyethers used in the present embodiment are not limited as long as they are electrochemically stable, but polyethylene glycol, polypropylene glycol, polytetramethylene glycol, and terminal monoethers, terminal diethers, terminal carboxylic acids thereof. Esters can be used. These may be used alone or in combination. In view of availability and economy, it is preferable to use polyethylene glycol. These molecular weights are not particularly limited, and the average molecular weight is in the range of 2 to 100,000, more preferably in the range of 200 to 50000, and most preferably in the range of 200 to 15000.
- the addition amount of the polyethers is not particularly limited, but is usually 0.01 to 20 parts by weight with respect to 100 parts by weight of the ⁇ -olefin-maleic acid copolymer (solid content), More preferably, it is in the range of 0.05 to 12 parts by weight. Too much addition amount is not preferable because it decreases the adhesion to the collector electrode, and too little addition amount is not preferable because toughness cannot be imparted.
- the polyether can be added simultaneously with the reaction of the ⁇ -olefin-maleic acid copolymer and the basic substance containing a monovalent metal, or the ⁇ -olefin-maleic acid copolymer.
- a basic substance containing a monovalent metal can be added after the reaction.
- the ring-opening rate of the copolymer represents the hydrolysis rate of the site of maleic anhydride that is polymerized with ⁇ -olefins when maleic anhydride is used as the maleic acid.
- a preferable ring opening rate is 60 to 100%, more preferably 70% to 100%, and still more preferably 80 to 100%. If the ring-opening rate is too low, the structural freedom of the copolymer becomes small and the stretchability becomes poor, so that the force for adhering the electrode material particles to be bonded may be small, which is not preferable. Furthermore, there is a possibility that problems such as low affinity for water and poor solubility may occur.
- the ring-opening rate can be determined, for example, by measuring the hydrogen at the ⁇ -position of the maleic acid opened by 1H-NMR with reference to the hydrogen at the ⁇ -position of maleic anhydride.
- the ratio of the carbonyl group derived from the carbonyl group and the ring-opened maleic anhydride can also be determined by IR measurement.
- the neutralized salt of the copolymer means that the active hydrogen of the carbonyl acid generated by the ring opening of maleic anhydride is a basic substance as described above. It forms a salt by forming a salt.
- the degree of neutralization in this case is not particularly limited. However, when used as a binder, in consideration of reactivity with the electrolytic solution, usually with respect to 1 mol of carbonyl acid generated by ring opening, A range of 0.5 to 1 mol is preferable, and a neutralized range of 0.6 to 1 mol is more preferable. Such a neutralization degree has the advantage of low acidity and suppression of electrolyte decomposition.
- the degree of neutralization of the copolymer when maleic anhydride is used can be measured by the same method as described above.
- the binder composition of this embodiment is usually used as a binder aqueous solution for a non-aqueous electrolyte battery comprising the above-described binder composition and water.
- nonaqueous electrolyte battery binder composition of the present embodiment is usually a nonaqueous electrolyte battery slurry composition (hereinafter simply referred to as slurry), which further contains an active material and water in addition to the above-described binder composition. It is preferably used as a composition).
- slurry nonaqueous electrolyte battery slurry composition
- the nonaqueous electrolyte battery negative electrode is formed by binding a current collector to a mixed layer containing at least the binder composition for a nonaqueous electrolyte battery of the present embodiment and a negative electrode active material.
- This negative electrode can be formed by applying the slurry composition for a non-aqueous electrolyte battery negative electrode to a current collector and then removing the solvent by a method such as drying. If necessary, a thickener, a conductive aid and the like can be added to the mixed layer.
- the amount of the neutralized salt of ⁇ -olefin-maleic acid copolymer used relative to 100 parts by weight of the active material is usually preferably 0.1 to 4 parts by weight. More preferred is 0.3 to 3 parts by weight, still more preferred is 0.5 to 2 parts by weight. If the amount of copolymer is too small, the viscosity of the slurry for nonaqueous electrolyte batteries may be too low and the thickness of the mixed layer may be reduced. Conversely, if the amount of copolymer is too large, the discharge capacity may decrease. There is sex.
- the amount of the solvent in the slurry composition is usually preferably 40 to 150 parts by weight, more preferably 70 to 130 parts by weight with respect to 100 parts by weight of the active material.
- the solvent in the negative electrode slurry composition of the present embodiment in addition to the above water, for example, alcohols such as methanol, ethanol, propanol and 2-propanol, cyclic ethers such as tetrahydrofuran and 1,4-dioxane, N, Amides such as N-dimethylformamide and N, N-dimethylacetamide, cyclic amides such as N-methylpyrrolidone and N-ethylpyrrolidone, and sulfoxides such as dimethylsulfoxide can also be used. In these, use of water is preferable from a viewpoint of safety.
- the following organic solvent may be used in combination within a range of preferably 20% by weight or less of the total solvent.
- Such an organic solvent preferably has a boiling point at normal pressure of 100 ° C. or higher and 300 ° C. or lower, for example, hydrocarbons such as n-dodecane; alcohols such as 2-ethyl-1-hexanol and 1-nonanol.
- Esters such as ⁇ -butyrolactone and methyl lactate; amides such as N-methylpyrrolidone, N, N-dimethylacetamide and dimethylformamide; and organic dispersion media such as sulfoxides and sulfones such as dimethyl sulfoxide and sulfolane.
- examples of the negative electrode active material (sometimes abbreviated as active material) added to the negative electrode slurry composition include amorphous carbon, graphite, natural graphite, Carbonaceous materials such as mesocarbon microbeads (MCMB) and pitch-based carbon fibers; conductive polymers such as polyacene; composite metal oxides represented by SiOx, SnOx, LiTiOx, other metal oxides, lithium metal, lithium Examples thereof include lithium-based metals such as alloys; metal compounds such as TiS 2 and LiTiS 2 .
- a thickener can be further added to the slurry composition as necessary.
- the thickener that can be added is not particularly limited, and various alcohols, in particular, polyvinyl alcohol and modified products thereof, celluloses, starches, and other polysaccharides can be used.
- the amount of the thickener used as necessary in the slurry composition is preferably about 0.1 to 4 parts by weight, more preferably 0.3 to 3 parts by weight with respect to 100 parts of the negative electrode active material. More preferably, it is 0.5 to 2 parts by weight. If the amount of the thickener is excessively small, the viscosity of the slurry may be too low and the thickness of the mixed layer may be reduced. Conversely, if the amount of the thickener is excessively large, the discharge capacity may be decreased.
- examples of the conductive auxiliary compounded in the slurry composition as necessary include metal powder, conductive polymer, acetylene black, and the like.
- the amount of the conductive aid used is usually preferably 0.5 to 10 parts by weight, more preferably 1 to 7 parts by weight with respect to 100 parts by weight of the active material.
- the current collector used for the nonaqueous electrolyte battery negative electrode of the present embodiment is not particularly limited as long as it is made of a conductive material.
- a conductive material For example, iron, copper, aluminum, nickel, stainless steel, titanium, tantalum, gold Metal materials such as platinum can be used. One of these may be used alone, or two or more of these may be used in combination at any ratio.
- the shape of the current collector is not particularly limited, but usually it is preferably a sheet having a thickness of about 0.001 to 0.5 mm.
- the method for applying the slurry to the current collector is not particularly limited. Examples thereof include a doctor blade method, a dip method, a reverse roll method, a direct roll method, a gravure method, an extrusion method, a dipping method, and a brush coating method.
- the amount to be applied is not particularly limited, but the thickness of the mixed layer containing the active material, conductive additive, binder and thickener formed after removing the solvent or dispersion medium by a method such as drying is preferably 0.005 to An amount of 5 mm, more preferably 0.01 to 2 mm is common.
- the method for drying a solvent such as water contained in the slurry composition is not particularly limited, and examples thereof include aeration drying with hot air, hot air, and low-humidity air; vacuum drying; drying with infrared rays, far infrared rays, electron beams, and the like. .
- the drying conditions are preferably adjusted so that the solvent can be removed as soon as possible while the active material layer is cracked by stress concentration or the active material layer does not peel from the current collector.
- the pressing method include a die press and a roll press.
- the present invention also includes a non-aqueous electrolyte battery having the negative electrode.
- the nonaqueous electrolyte battery usually includes the negative electrode, the positive electrode, and an electrolytic solution.
- the positive electrode normally used for nonaqueous electrolyte batteries is especially used for a positive electrode without a restriction
- the positive electrode active material TiS 2 , TiS 3 , amorphous MoS 3 , Cu 2 V 2 O 3 , amorphous V 2 O—P 2 O 5 , MoO 3 , V 2 O 5 , V 6 O Transition metal oxides such as 13 and lithium-containing composite metal oxides such as LiCoO 2 , LiNiO 2 , LiMnO 2 , and LiMn 2 O 4 are used.
- the positive electrode active material is made of a conductive additive similar to that of the negative electrode, and a binder such as SBR, NBR, acrylic rubber, hydroxyethyl cellulose, carboxymethyl cellulose, polyvinylidene fluoride, and the boiling point at 100 ° C. in water or the above normal pressure.
- a binder such as SBR, NBR, acrylic rubber, hydroxyethyl cellulose, carboxymethyl cellulose, polyvinylidene fluoride, and the boiling point at 100 ° C. in water or the above normal pressure.
- the positive electrode slurry prepared by mixing in a solvent of 300 ° C. or lower can be applied to a positive electrode current collector such as aluminum and the solvent can be dried to obtain a positive electrode.
- an electrolytic solution in which an electrolyte is dissolved in a solvent can be used.
- the electrolyte solution may be liquid or gel as long as it is used for a non-aqueous electrolyte battery such as a normal lithium ion secondary battery, and functions as a battery depending on the type of the negative electrode active material and the positive electrode active material. What is necessary is just to select suitably.
- lithium salt for example, also known lithium salt is any conventionally available, LiClO 4, LiBF 6, LiPF 6, LiCF 3 SO 3, LiCF 3 CO 2, LiAsF 6, LiSbF 6, LiB 10 Cl 10 , LiAlC l4, LiCl, LiBr, LiB (C 2 H 5) 4, CF 3 SO 3 Li, CH 3 SO 3 Li, LiCF 3 SO 3, LiC 4 F 9 SO 3, Li (CF 3 SO 2) 2 N And lower aliphatic lithium carboxylates.
- the solvent for dissolving such an electrolyte is not particularly limited. Specific examples include carbonates such as propylene carbonate, ethylene carbonate, butylene carbonate, dimethyl carbonate, and diethyl carbonate; lactones such as ⁇ -butyllactone; trimethoxymethane, 1,2-dimethoxyethane, diethyl ether, and 2-ethoxyethane.
- Ethers such as tetrahydrofuran, 2-methyltetrahydrofuran; sulfoxides such as dimethyl sulfoxide; oxolanes such as 1,3-dioxolane, 4-methyl-1,3-dioxolane; nitrogen-containing compounds such as acetonitrile and nitromethane; formic acid Organic acid esters such as methyl, methyl acetate, ethyl acetate, butyl acetate, methyl propionate and ethyl propionate; inorganic acid esters such as triethyl phosphate, dimethyl carbonate and diethyl carbonate Terigres; diglymes; triglymes; sulfolanes; oxazolidinones such as 3-methyl-2-oxazolidinone; sultones such as 1,3-propane sultone, 1,4-butane sultone, naphtha sultone, etc.
- a gel electrolyte a nitrile polymer, an acrylic polymer, a fluorine polymer, an alkylene oxide polymer, or the like can be added as a gelling agent.
- the method for producing the non-aqueous electrolyte battery of the present embodiment is not particularly limited, and for example, the following production method is exemplified. That is, the negative electrode and the positive electrode are overlapped with each other via a separator such as a polypropylene porous membrane, wound or folded according to the shape of the battery, put into a battery container, injected with an electrolyte, and sealed.
- the shape of the battery may be any known coin type, button type, sheet type, cylindrical type, square type, flat type, and the like.
- the nonaqueous electrolyte battery of the present embodiment is a battery that achieves both improved adhesion and improved battery characteristics, and is useful for various applications.
- the battery is very useful as a battery used in a portable terminal that is required to be small, thin, light, and have high performance.
- the binder composition for a non-aqueous electrolyte battery according to one aspect of the present invention (hereinafter also simply referred to as a binder composition) is an ⁇ -olefin-maleic acid copolymer obtained by copolymerizing an ⁇ -olefin and a maleic acid. It is characterized by containing a neutralized salt and a polyether.
- the battery characteristics can be improved without impairing the binding property between the active materials and the collector electrode and the toughness as the electrode.
- a binder aqueous solution for a non-aqueous electrolyte battery is characterized by comprising the above-mentioned binder composition and water.
- a slurry composition for a non-aqueous electrolyte battery is characterized by including the binder composition, an active material, and a solvent.
- a nonaqueous electrolyte battery negative electrode is characterized in that a current collector is bound with a mixed layer containing at least the binder composition for a nonaqueous electrolyte battery and an active material.
- a nonaqueous electrolyte battery includes the nonaqueous electrolyte battery negative electrode, a positive electrode, and an electrolytic solution.
- PEG polyethylene glycol
- the slurry for the electrode is 6.452 parts by weight of a 10% by weight aqueous solution of the binder composition for the negative electrode as a solid content with respect to 100 parts by weight of natural graphite (DMGS, manufactured by BYD) as the negative electrode active material, and a conductive auxiliary agent (conductive As an imparting agent, Super-P (manufactured by Timcal Co., Ltd.) in an amount of 1.075 parts by weight as a solid content was put into a special container and kneaded using a planetary stirrer (ARE-250, manufactured by Sinky).
- a planetary stirrer ARE-250, manufactured by Sinky
- an electrode coating slurry was prepared by adding water at the time of kneading and kneading again.
- the battery coating electrode obtained above was transferred to a glove box (Miwa Seisakusho) under an argon gas atmosphere.
- a metal lithium foil (thickness 0.2 mm, ⁇ 16 mm) was used for the positive electrode.
- a polypropylene system (Celgard # 2400, manufactured by Polypore) is used as a separator, and the electrolyte is ethylene carbonate (EC) of lithium hexafluorophosphate (LiPF 6 ) and vinylene carbonate (EMC) with vinylene carbonate (EMC).
- EC ethylene carbonate
- LiPF 6 lithium hexafluorophosphate
- EMC vinylene carbonate
- EMC vinylene carbonate
- ⁇ Evaluation method charge / discharge characteristic test>
- the produced coin battery was subjected to a charge / discharge test using a commercially available charge / discharge tester (TOSCAT3100, manufactured by Toyo System).
- the coin battery is placed in a constant temperature bath at 25 ° C., and charging is performed with a constant current of 0.1 C (about 0.5 mA / cm 2 ) with respect to the amount of active material until the voltage reaches 0 V with respect to the lithium potential.
- the constant voltage charge of 0V was implemented to the electric current of 0.02 mA.
- the capacity at this time was defined as a charging capacity (mAh / g).
- a slurry for a nonaqueous electrolyte battery was produced in the same manner as in Example 1 above. Further, a coated negative electrode was prepared by the same method as in Example 1 to obtain a coin battery, and a charge / discharge characteristic test was performed. Moreover, the toughness test and peel strength measurement were performed using the coated electrode. The results are shown in Table 1 below.
- a slurry for a nonaqueous electrolyte battery was produced in the same manner as in Example 1 above. Further, a coated negative electrode was prepared by the same method as in Example 1 to obtain a coin battery, and a charge / discharge characteristic test was performed. Moreover, the toughness test and peel strength measurement were performed using the coated electrode. The results are shown in Table 1 below.
- a slurry for a nonaqueous electrolyte battery was produced in the same manner as in Example 1 above. Further, a coated negative electrode was prepared by the same method as in Example 1 to obtain a coin battery, and a charge / discharge characteristic test was performed. Moreover, the toughness test and peel strength measurement were performed using the coated electrode. The results are shown in Table 1 below.
- a slurry for a nonaqueous electrolyte battery was produced in the same manner as in Example 1 above. Further, a coated negative electrode was prepared by the same method as in Example 1 to obtain a coin battery, and a charge / discharge characteristic test was performed. Moreover, the toughness test and peel strength measurement were performed using the coated electrode. The results are shown in Table 1 below.
- PEG polyethylene glycol
- a slurry for a nonaqueous electrolyte battery was produced in the same manner as in Example 1 above. Further, a coated negative electrode was prepared by the same method as in Example 1 to obtain a coin battery, and a charge / discharge characteristic test was performed. Moreover, the toughness test and peel strength measurement were performed using the coated electrode. The results are shown in Table 1 below.
- PEG polyethylene glycol
- a slurry for a nonaqueous electrolyte battery was produced in the same manner as in Example 1 above. Further, a coated negative electrode was prepared by the same method as in Example 1 to obtain a coin battery, and a charge / discharge characteristic test was performed. Moreover, the toughness test and peel strength measurement were performed using the coated electrode. The results are shown in Table 1 below.
- Example 1 A 10 w% aqueous solution of the resin used in Example 1 was prepared and used as a negative electrode binder composition. A slurry for a nonaqueous electrolyte battery was produced in the same manner as in Example 1 above. Further, a coated negative electrode was prepared by the same method as in Example 1 to obtain a coin battery, and a charge / discharge characteristic test was performed. Moreover, the toughness test and peel strength measurement were performed using the coated electrode. The results are shown in Table 1 below.
- Example 2 A 10 w% aqueous solution of the resin used in Example 6 was prepared and used as a negative electrode binder composition. A slurry for a nonaqueous electrolyte battery was produced in the same manner as in Example 1 above. Further, a coated negative electrode was prepared by the same method as in Example 1 to obtain a coin battery, and a charge / discharge characteristic test was performed. Moreover, the toughness test and peel strength measurement were performed using the coated electrode. The results are shown in Table 1 below.
- Example 3 A 10 w% aqueous solution of the resin used in Example 7 was prepared and used as a negative electrode binder composition. A slurry for a nonaqueous electrolyte battery was produced in the same manner as in Example 1 above. Further, a coated negative electrode was prepared by the same method as in Example 1 to obtain a coin battery, and a charge / discharge characteristic test was performed. Moreover, the toughness test and peel strength measurement were performed using the coated electrode. The results are shown in Table 1 below.
- Comparative Examples 1 to 3 that did not contain polyethers resulted in low toughness and adhesion.
- the present invention has wide industrial applicability in the technical field of non-aqueous electrolyte batteries.
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Abstract
Description
<負極用バインダー組成物>
負極用バインダー組成物として水溶性のリチウム変性イソブテン-無水マレイン酸共重合樹脂(平均分子量325,000、中和度0.5、開環率96%)の10w%水溶液を調整した。さらにポリエーテル類としてポリエチレングリコール(PEG、和光純薬工業株式会社製、平均分子量600)の10w%水溶液を調整し、樹脂10w%水溶液:PEG10w%水溶液=95:5(固形分として樹脂:PEG=6.129:0.323)の重量比となるように混合した。
電極用スラリー作製は負極用活物質として天然黒鉛(DMGS、BYD製)100重量部に対して、負極用バインダー組成物の10w%水溶液を固形分として6.452重量部、および導電助剤(導電付与剤)としてSuper-P(ティムカル社製)を固形分として1.075重量部を専用容器に投入し、遊星攪拌器(ARE-250、シンキー製)を用いて混練した。スラリー粘度調整のため、混練時は水を添加して再度混練することによって電極塗工用スラリーを作製した。スラリー中の活物質とバインダーの組成比は固形分として、黒鉛粉末:導電助剤:バインダー組成物=100:1.075:6.452である。
得られたスラリーをバーコーター(T101、松尾産業製)を用いて集電体の銅箔(CST8G、福田金属箔粉工業製)上に塗工し、80℃で30分間熱風乾燥機(ヤマト科学製)にて一次乾燥後、ロールプレス(宝泉製)を用いて圧延処理を行なった。その後、電池用電極(φ14mm)として打ち抜き後、120℃で3時間減圧条件の二次乾燥によってコイン電池用電極を作製した。
電極の靭性の評価はJIS K5600-5-1(塗料一般試験方法-第5部:塗膜の機械的性質-第1節:耐屈曲性(円筒形マンドレル法))のタイプ1の試験装置を用いて行った。電極割れの確認は目視で行い、割れが生じなかった最小のマンドレル径の結果を下記表1に示す。なお、靱性は、マンドレル径が小さいほど高く、5mm以下であると電極として使用するのに好ましい。
集電極である銅箔から電極を剥離したときの強度を測定した。当該剥離強度は、50Nのロードセル(株式会社イマダ製)を用いて180°剥離強度を測定した。上記で得られた電池用塗工電極のスラリー塗布面とステンレス板とを両面テープ(ニチバン製両面テープ)を用いて貼り合わせ、180°剥離強度(剥離幅10mm、剥離速度100mm/min)を測定した。上記結果を下記表1に示す。
上記で得られた電池用塗工電極をアルゴンガス雰囲気下のグローブボックス(美和製作所製)に移送した。正極には金属リチウム箔(厚さ0.2mm、φ16mm)を用いた。また、セパレーターとしてポリプロフィレン系(セルガード#2400、ポリポア製)を使用して、電解液は六フッ化リン酸リチウム(LiPF6)のエチレンカーボネート(EC)とエチルメチルカーボネート(EMC)にビニレンカーボネート(VC)を添加した混合溶媒系(1M-LiPF6、EC/EMC=3/7vol%、VC2wt%)を用いて注入し、コイン電池(2032タイプ)を作製した。
作製したコイン電池は、市販充放電試験機(TOSCAT3100、東洋システム製)を用いて充放電試験を実施した。コイン電池を25℃の恒温槽に置き、充電はリチウム電位に対して0Vになるまで活物質量に対して0.1C(約0.5mA/cm2)の定電流充電を行い、更にリチウム電位に対して0.02mAの電流まで0Vの定電圧充電を実施した。このときの容量を充電容量(mAh/g)とした。次いで、リチウム電位に対して0.1C(約0.5mA/cm2)の定電流放電を1.5Vまで行い、このときの容量を放電容量(mAh/g)とした。初期放電容量と充電容量差を不可逆容量、放電容量/充電容量の百分率を充放電効率とした。コイン電池の直流抵抗は、1回の充電を行った後(満充電状態)の抵抗値を採用した。上記結果を下記表1に示す。
実施例1で用いた樹脂とポリエーテル類としてポリエチレングリコール(PEG、和光純薬工業株式会社製、平均分子量6000)の10w%水溶液を調整し、樹脂10w%水溶液:PEG10w%水溶液=95:5(固形分として樹脂:PEG=6.129:0.323)となるように混合した。非水電解質電池用スラリーを上記実施例1と同様の方法によって作製した。さらに、上記実施例1と同様の方法によって塗工負極を作製し、コイン電池を得て、充放電特性試験を行った。また塗工電極を用いて、靱性試験及び剥離強度測定を行った。結果を下記表1に示す。
実施例1で用いた樹脂とポリエーテル類としてポリエチレングリコール(PEG、和光純薬工業株式会社製、平均分子量20000)の10w%水溶液を調整し、樹脂10w%水溶液:PEG10w%水溶液=95:5(固形分として樹脂:PEG=6.129:0.323)となるように混合した。非水電解質電池用スラリーを上記実施例1と同様の方法によって作製した。さらに、上記実施例1と同様の方法によって塗工負極を作製し、コイン電池を得て、充放電特性試験を行った。また塗工電極を用いて、靱性試験及び剥離強度測定を行った。結果を下記表1に示す。
実施例1で用いた樹脂とポリエーテル類としてポリエチレングリコール(PEG、和光純薬工業株式会社製、平均分子量6000)の10w%水溶液を調整し、樹脂10w%水溶液:PEG10w%水溶液=99:1(固形分として樹脂:PEG=6.387:0.065)となるように混合した。非水電解質電池用スラリーを上記実施例1と同様の方法によって作製した。さらに、上記実施例1と同様の方法によって塗工負極を作製し、コイン電池を得て、充放電特性試験を行った。また塗工電極を用いて、靱性試験及び剥離強度測定を行った。結果を下記表1に示す。
実施例1で用いた樹脂とポリエーテル類としてポリエチレングリコール(PEG、和光純薬工業株式会社製、平均分子量6000)の10w%水溶液を調整し、樹脂10w%水溶液:PEG10w%水溶液=90:10(固形分として樹脂:PEG=5.806:0.645)となるように混合した。非水電解質電池用スラリーを上記実施例1と同様の方法によって作製した。さらに、上記実施例1と同様の方法によって塗工負極を作製し、コイン電池を得て、充放電特性試験を行った。また塗工電極を用いて、靱性試験及び剥離強度測定を行った。結果を下記表1に示す。
負極用バインダー組成物として水溶性のリチウム変性メチルビニルエーテル-無水マレイン酸共重合樹脂(平均分子量630,000、中和度0.5、開環率96%)の10w%水溶液を調整した。さらにポリエーテル類としてポリエチレングリコール(PEG、和光純薬工業株式会社製、平均分子量6000)の10w%水溶液を調整し、樹脂10w%水溶液:PEG10w%水溶液=95:5(固形分として樹脂:PEG=6.129:0.323)となるように混合した。非水電解質電池用スラリーを上記実施例1と同様の方法によって作製した。さらに、上記実施例1と同様の方法によって塗工負極を作製し、コイン電池を得て、充放電特性試験を行った。また塗工電極を用いて、靱性試験及び剥離強度測定を行った。結果を下記表1に示す。
負極用バインダー組成物として水溶性のリチウム変性エチレン-無水マレイン酸共重合樹脂(平均分子量100,000~600,000、中和度0.5、開環率96%)の10w%水溶液を調整した。さらにポリエーテル類としてポリエチレングリコール(PEG、和光純薬工業株式会社製、平均分子量6000)の10w%水溶液を調整し、樹脂10w%水溶液:PEG10w%水溶液=95:5(固形分として樹脂:PEG=6.129:0.323)となるように混合した。非水電解質電池用スラリーを上記実施例1と同様の方法によって作製した。さらに、上記実施例1と同様の方法によって塗工負極を作製し、コイン電池を得て、充放電特性試験を行った。また塗工電極を用いて、靱性試験及び剥離強度測定を行った。結果を下記表1に示す。
実施例1で用いた樹脂の10w%水溶液を調整し負極用バインダー組成物として用いた。非水電解質電池用スラリーを上記実施例1と同様の方法によって作製した。さらに、上記実施例1と同様の方法によって塗工負極を作製し、コイン電池を得て、充放電特性試験を行った。また塗工電極を用いて、靱性試験及び剥離強度測定を行った。結果を下記表1に示す。
実施例6で用いた樹脂の10w%水溶液を調整し負極用バインダー組成物として用いた。非水電解質電池用スラリーを上記実施例1と同様の方法によって作製した。さらに、上記実施例1と同様の方法によって塗工負極を作製し、コイン電池を得て、充放電特性試験を行った。また塗工電極を用いて、靱性試験及び剥離強度測定を行った。結果を下記表1に示す。
実施例7で用いた樹脂の10w%水溶液を調整し負極用バインダー組成物として用いた。非水電解質電池用スラリーを上記実施例1と同様の方法によって作製した。さらに、上記実施例1と同様の方法によって塗工負極を作製し、コイン電池を得て、充放電特性試験を行った。また塗工電極を用いて、靱性試験及び剥離強度測定を行った。結果を下記表1に示す。
負極用バインダー組成物にポリエーテル類が含有されている実施例1~7では、可塑剤としてポリエーテル類作用したことによる靭性、接着性の向上が見られた。そして、表1から明らかなように、本発明に関する実施例においては、ポリエーテル類を添加しても電池特性には大きく影響を与えず、低抵抗化が実現することが示された。
Claims (5)
- α-オレフィン類とマレイン酸類とが共重合したα-オレフィン-マレイン酸類共重合体の中和塩およびポリエーテル類を含有する、非水電解質電池用バインダー組成物。
- 請求項1に記載のバインダー組成物と水とからなる、非水電解質電池用バインダー水溶液。
- 請求項1に記載のバインダー組成物と活物質と水とを含有する、非水電解質電池用スラリー組成物。
- 請求項1に記載のバインダー組成物と活物質とを含有する混合層を集電体に結着してなる、非水電解質電池負極。
- 請求項4に記載の非水電解質電池負極を有する、非水電解質電池。
Priority Applications (4)
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|---|---|---|---|
| CN201680046982.5A CN107925084A (zh) | 2015-08-10 | 2016-08-09 | 非水电解质电池用粘结剂组合物、以及使用其的非水电解质电池用浆料组合物、非水电解质电池负极及非水电解质电池 |
| KR1020187006774A KR20180039136A (ko) | 2015-08-10 | 2016-08-09 | 비수 전해질 전지용 바인더 조성물, 그리고 그것을 사용한 비수 전해질 전지용 슬러리 조성물, 비수 전해질 전지 부극, 및 비수 전해질 전지 |
| JP2016567944A JP6138382B1 (ja) | 2015-08-10 | 2016-08-09 | 非水電解質電池用バインダー組成物、並びにそれを用いた非水電解質電池用スラリー組成物、非水電解質電池負極、及び非水電解質電池 |
| US15/750,740 US20190273260A1 (en) | 2015-08-10 | 2016-08-09 | Non aqueous electrolyte battery binder composition, and non aqueous electrolyte battery slurry composition, non aqueous electrolyte battery negative electrode, and non aqueous electrolyte battery using same |
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| JP2015158267 | 2015-08-10 | ||
| JP2015-158267 | 2015-08-10 |
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| US (1) | US20190273260A1 (ja) |
| JP (1) | JP6138382B1 (ja) |
| KR (1) | KR20180039136A (ja) |
| CN (1) | CN107925084A (ja) |
| TW (1) | TWI614937B (ja) |
| WO (1) | WO2017026474A1 (ja) |
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| CN109524670A (zh) * | 2018-11-12 | 2019-03-26 | 溧阳中科海钠科技有限责任公司 | 一种二次电池正极浆料、正极极片和二次电池 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008029502A1 (fr) * | 2006-08-29 | 2008-03-13 | Unitika Ltd. | Liant pour fabrication d'électrode, boue pour fabrication d'électrode utilisant le liant, électrode utilisant la boue, batterie secondaire utilisant l'électrode et condensateur utilisant l'électrode |
| JP2010009940A (ja) * | 2008-06-26 | 2010-01-14 | Denso Corp | 二次電池電極用バインダー、並びに該バインダーを用いた二次電池用電極及び非水電解液二次電池 |
| JP2010518581A (ja) * | 2007-02-06 | 2010-05-27 | スリーエム イノベイティブ プロパティズ カンパニー | 新規結合剤を含む電極、並びにその製造方法及び使用方法 |
| JP2010277959A (ja) * | 2009-06-01 | 2010-12-09 | Unitika Ltd | 二次電池電極用バインダー用樹脂組成物、二次電池電極用バインダー、二次電池電極用バインダーを用いてなる電極及び二次電池 |
| JP2014510362A (ja) * | 2011-01-27 | 2014-04-24 | ネグゼオン・リミテッド | 二次電池セル用バインダー |
| WO2015083358A1 (ja) * | 2013-12-02 | 2015-06-11 | 三井化学株式会社 | 電気化学セル用バインダー、電気化学セル用ペースト、電気化学セル用電極の製造方法 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000067338A1 (en) * | 1999-04-29 | 2000-11-09 | Eveready Battery Company, Inc. | Graphite electrode binder including polyethylene oxide additive |
| JP4905861B2 (ja) * | 2005-02-10 | 2012-03-28 | 日立化成工業株式会社 | エネルギーデバイス電極用バインダ樹脂エマルション及びこれを用いたエネルギーデバイス電極並びにエネルギーデバイス |
| JP5431699B2 (ja) * | 2008-08-29 | 2014-03-05 | ユニチカ株式会社 | 二次電池電極用バインダー、それを用いてなる電極及び二次電池 |
| WO2011062232A1 (ja) * | 2009-11-18 | 2011-05-26 | 三井化学株式会社 | 電気化学セル用水性ペースト、該水性ペーストを塗布してなる電気化学セル用極板、および該極板を含む電池 |
| JP2011210502A (ja) * | 2010-03-30 | 2011-10-20 | Unitika Ltd | 二次電池電極用バインダー、二次電池電極および二次電池 |
-
2016
- 2016-08-09 US US15/750,740 patent/US20190273260A1/en not_active Abandoned
- 2016-08-09 TW TW105125231A patent/TWI614937B/zh active
- 2016-08-09 WO PCT/JP2016/073404 patent/WO2017026474A1/ja not_active Ceased
- 2016-08-09 KR KR1020187006774A patent/KR20180039136A/ko not_active Ceased
- 2016-08-09 JP JP2016567944A patent/JP6138382B1/ja active Active
- 2016-08-09 CN CN201680046982.5A patent/CN107925084A/zh active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008029502A1 (fr) * | 2006-08-29 | 2008-03-13 | Unitika Ltd. | Liant pour fabrication d'électrode, boue pour fabrication d'électrode utilisant le liant, électrode utilisant la boue, batterie secondaire utilisant l'électrode et condensateur utilisant l'électrode |
| JP2010518581A (ja) * | 2007-02-06 | 2010-05-27 | スリーエム イノベイティブ プロパティズ カンパニー | 新規結合剤を含む電極、並びにその製造方法及び使用方法 |
| JP2010009940A (ja) * | 2008-06-26 | 2010-01-14 | Denso Corp | 二次電池電極用バインダー、並びに該バインダーを用いた二次電池用電極及び非水電解液二次電池 |
| JP2010277959A (ja) * | 2009-06-01 | 2010-12-09 | Unitika Ltd | 二次電池電極用バインダー用樹脂組成物、二次電池電極用バインダー、二次電池電極用バインダーを用いてなる電極及び二次電池 |
| JP2014510362A (ja) * | 2011-01-27 | 2014-04-24 | ネグゼオン・リミテッド | 二次電池セル用バインダー |
| WO2015083358A1 (ja) * | 2013-12-02 | 2015-06-11 | 三井化学株式会社 | 電気化学セル用バインダー、電気化学セル用ペースト、電気化学セル用電極の製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201714336A (zh) | 2017-04-16 |
| JPWO2017026474A1 (ja) | 2017-08-10 |
| TWI614937B (zh) | 2018-02-11 |
| KR20180039136A (ko) | 2018-04-17 |
| CN107925084A (zh) | 2018-04-17 |
| US20190273260A1 (en) | 2019-09-05 |
| JP6138382B1 (ja) | 2017-05-31 |
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