WO2023163013A1 - 正極合剤スラリーの製造方法 - Google Patents
正極合剤スラリーの製造方法 Download PDFInfo
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- WO2023163013A1 WO2023163013A1 PCT/JP2023/006379 JP2023006379W WO2023163013A1 WO 2023163013 A1 WO2023163013 A1 WO 2023163013A1 JP 2023006379 W JP2023006379 W JP 2023006379W WO 2023163013 A1 WO2023163013 A1 WO 2023163013A1
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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
- H01M4/139—Processes of manufacture
- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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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
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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
- H01M4/139—Processes of manufacture
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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
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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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
- H01M4/623—Binders being polymers fluorinated 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
- 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
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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
- H01M2004/028—Positive 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 disclosure relates to a method for producing a positive electrode mixture slurry, and more particularly to a method for producing a positive electrode mixture slurry used for producing a positive electrode (positive electrode mixture layer) for a non-aqueous electrolyte secondary battery.
- the positive electrode of a non-aqueous electrolyte secondary battery such as a lithium ion battery is generally obtained by coating a positive electrode mixture slurry containing a positive electrode active material, a binder, a conductive agent, and a dispersion medium on a core made of a metal foil or the like. , is produced by drying and pressing the coating film. Therefore, the properties of the positive electrode mixture slurry can greatly affect the productivity of the positive electrode and also affect the battery performance.
- Patent Literature 1 discloses a method for producing a slurry for electrode production, which aims to suppress deterioration of coatability.
- the method of Patent Document 1 includes a slurry preparation step in which a slurry is prepared by adding a diluent to a thickener and kneading, a first kneading step in which a powder material is added to the slurry and kneaded, and a first kneading step.
- a method for producing a positive electrode mixture slurry according to the present disclosure includes a first step of kneading a positive electrode active material, a binder, and a dispersion medium to prepare a first slurry, and adding a conductive agent and a dispersant to the first slurry. and a second step of adding and kneading to prepare a second slurry, wherein the second step is characterized in that the kinetic energy applied to the slurry is increased more than in the other steps.
- the method for producing a positive electrode mixture slurry according to the present disclosure preferably further includes a third step of adding a dispersion medium to the second slurry and kneading to prepare a third slurry.
- the solid content concentration of the third slurry is adjusted to, for example, 80% by mass or more.
- the method for producing a positive electrode mixture slurry according to the present disclosure it is possible to provide a positive electrode mixture slurry in which the dilatancy phenomenon is suppressed. Moreover, by adopting the production method according to the present disclosure, for example, the solid content concentration can be increased while suppressing the dilatancy phenomenon of the slurry, and the productivity of the positive electrode is improved.
- FIG. 3 is a diagram showing an example of a manufacturing flow of positive electrode mixture slurry
- FIG. 4 is a diagram showing the relationship between the shear rate and shear viscosity of positive electrode mixture slurry;
- the present inventors have found that the dilatancy phenomenon can be prevented by applying a larger kinetic energy to the slurry in the step of adding and kneading the conductive agent and the dispersant than in the other steps. found to be effectively suppressed.
- kinetic energy is applied in the kneading after adding the conductive agent and the dispersant than in the step of kneading the positive electrode active material, the binder, and the dispersion medium.
- a large amount of kinetic energy is applied to the slurry to which the conductive agent is added before the dispersion medium is added to lower the solid content concentration.
- the dispersibility of the conductive agent is considered to greatly affect the rheology of the positive electrode mixture slurry. It is presumed that dilatancy was effectively suppressed as a result of improved dispersibility of the conductive agent.
- Dilatancy is thought to occur due to temporary aggregation of the conductive agent, and it is especially likely to occur when the solid content concentration of the slurry is high. According to the method of the present disclosure, even if the solid content concentration of the slurry is increased to 80%, the dilatancy phenomenon can be suppressed to a high degree. Therefore, the method of the present disclosure is extremely useful in increasing the solid content concentration of the slurry to improve the productivity of the positive electrode.
- the manufacturing method of the present disclosure can be widely applied to manufacturing a positive electrode mixture slurry containing a positive electrode active material, a binder, a conductive agent, and a dispersion medium.
- the positive electrode mixture slurry obtained by the manufacturing method of the present disclosure is preferably used for manufacturing positive electrodes for non-aqueous electrolyte secondary batteries.
- non-aqueous electrolyte secondary batteries include lithium ion batteries, but other non-aqueous electrolyte secondary batteries such as lithium batteries may also be used.
- FIG. 1 is a flow chart showing an example of the method for producing the positive electrode material mixture slurry of the present disclosure, and the material mixing/kneading process is indicated by ⁇ .
- FIG. 2 is a graph showing the relationship between the shear rate and shear viscosity of the positive electrode mixture slurry obtained by this production method. is kneaded.
- the manufacturing process of the positive electrode mixture slurry includes a first step of kneading a positive electrode active material, a binder, and a dispersion medium to prepare a first slurry; and a second step of adding a conductive agent and a dispersant to one slurry and kneading them to prepare a second slurry. Then, in the second step, the kinetic energy applied to the slurry is increased more than in the other steps.
- the shear viscosity hardly increases even when shear stress is applied, and the dilatancy is effectively suppressed.
- the positive electrode mixture slurry is supplied to a coating device such as a die coater, for example, through a transport pipe having a filter. At this time, if a dilatancy phenomenon occurs, filter clogging, slurry retention, poor coating, and the like may occur, but the slurry of the present embodiment can highly suppress such problems.
- the positive electrode material mixture slurry is applied to the surface of a positive electrode core made of metal foil or the like to form a coating film. After drying, the coating film is compressed to form a positive electrode mixture layer containing the positive electrode active material, the binder, and the conductive agent, thereby obtaining a positive electrode in which the positive electrode mixture layer is formed on the positive electrode core.
- the manufacturing process of the positive electrode mixture slurry which is an example of the embodiment, further includes a third process of adding a dispersion medium to the second slurry and kneading to prepare a third slurry.
- a third process of adding a dispersion medium to the second slurry and kneading to prepare a third slurry By providing the third step, the viscosity of the slurry can be easily adjusted to the viscosity suitable for the coating by adding the dispersion medium while effectively suppressing the dilatancy.
- the dispersion medium is added to adjust the solid content concentration (viscosity).
- the positive electrode mixture slurry obtained by the production method that is an example of the embodiment preferably has a solid content concentration of 80% by mass or more from the viewpoint of improving the productivity of the positive electrode.
- the solid content concentration of the slurry is adjusted to 80% by mass or more.
- the solid content concentration of the slurry is more preferably 81% by mass or more, particularly preferably 82% by mass or more.
- the upper limit of solid content concentration is, for example, 85 to 90% by mass.
- the solid content concentration of the positive electrode mixture slurry is high, particularly when the solid content concentration is 80% by mass or more, dilatancy tends to occur. % or more, the dilatancy can be suppressed to a high degree.
- the production method of the present embodiment exhibits a more pronounced dilatancy suppressing effect when the solid content concentration is 80% by mass or more (eg, 80 to 90% by mass).
- the positive electrode active material, the binder, and the dispersion medium are kneaded to prepare the first slurry. That is, before adding the conductive agent to the slurry, the positive electrode active material and the binder are dispersed in the dispersion medium.
- the solid content concentration of the first slurry is higher than the solid content concentration of the finally obtained positive electrode mixture slurry, and is preferably 84 to 90% by mass.
- the positive electrode active material and the binder are dry-blended before being added to the dispersion medium.
- a mixture of the positive electrode active material and the binder is kneaded with a dispersion medium to prepare a first slurry.
- the mixer or the like used in the first step can be used.
- a particulate lithium-containing transition metal composite oxide is generally used for the positive electrode active material.
- a lithium-containing transition metal composite oxide is a composite oxide containing Co, Mn, Ni, Al, etc. in addition to Li.
- Metal elements constituting the lithium-containing transition metal composite oxide include, for example, Mg, Al, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Y, Zr, Sn , Sb, W, Pb, and Bi. Among them, it is preferable to contain at least one selected from Co, Ni, and Mn.
- suitable composite oxides include composite oxides containing Ni, Co and Mn and composite oxides containing Ni, Co and Al.
- the ratio of the positive electrode active material to the solid content of the positive electrode mixture slurry is, for example, 90% by mass or more, preferably 90 to 99.5% by mass, more preferably 95 to 99% by mass.
- the volume-based median diameter (hereinafter sometimes referred to as “D50”) of the positive electrode active material is 1 to 25 ⁇ m, preferably 3 to 15 ⁇ m. D50 means the particle size at which the cumulative frequency is 50% from the smaller particle size in the volume-based particle size distribution.
- the particle size distribution of the composite oxide particles can be measured using a laser diffraction particle size distribution analyzer (eg MT3000II manufactured by Microtrack Bell Co., Ltd.) using water as a dispersion medium. Two or more active materials with different compositions, D50, etc. may be added to the first slurry.
- binders fluorine-containing resins such as polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVdF), polyacrylonitrile (PAN), polyimide, acrylic resins, polyolefins, etc. are used. Moreover, these resins, carboxymethyl cellulose (CMC) or its salt, polyethylene oxide (PEO), etc. may be used together as a binder and thickener.
- the ratio of the binder to the solid content of the positive electrode mixture slurry is, for example, 0.1 to 8% by mass, preferably 0.2 to 5% by mass, and more preferably 0.5 to 3% by mass. Two or more binders may be added to the first slurry.
- the dispersion medium for example, disperses the positive electrode active material and the conductive agent and dissolves the binder.
- the dispersion medium it is possible to use water, a lower alcohol such as ethanol, or the like depending on the type of binder, but generally an organic solvent is used.
- Organic solvents suitable for the dispersion medium include N-methyl-2-pyrrolidone (NMP), cyclohexane, methyl ethyl ketone, methyl isobutyl ketone and the like.
- NMP N-methyl-2-pyrrolidone
- cyclohexane cyclohexane
- methyl ethyl ketone methyl isobutyl ketone
- the binder is a fluorine-containing resin such as PVdF, it is preferable to use NMP.
- mixer For kneading in the first step, a conventionally known disperser or mixer (hereinafter referred to as "mixer, etc.") that can be used for slurry preparation can be used.
- mixers include planetary mixers, homomixers, pin mixers, high-speed mixers, dispersers, roll mills, ball mills, jet mills, kneaders, and the like.
- different mixers and the like can be used in the first step, the second step and the third step, it is preferable to use the same mixer and the like in each step from the viewpoint of productivity and the like.
- a planetary mixer is a rotation-revolution type stirring mixer that can apply a strong shearing force to the slurry through planetary motion of the blades.
- Planetary mixers generally have two frame blades. The blade may be either straight type with no twist or non-straight type with twist.
- the kinetic energy applied to the slurry can be controlled by the stirring speed and stirring time, and increases as the stirring speed increases and the stirring time increases. The details of the kneading conditions will be described later.
- the conductive agent and the dispersant are added to the first slurry containing the positive electrode active material and the binder, and the mixture is kneaded to prepare the second slurry.
- the conductive agent is preferably supplied in the form of a paste dispersed in a predetermined dispersion medium in advance.
- the paste contains a dispersant.
- the predetermined dispersion medium may be different from the dispersion medium of the first slurry, but preferably they are miscible with each other.
- the solid content concentration of the second slurry is the same as or slightly lower than the solid content concentration of the first slurry, preferably 81 to 86% by mass.
- the slurry is vigorously stirred for a long time so as to increase the kinetic energy applied to the slurry as compared with the first step.
- a carbon-based conductive agent As the conductive agent.
- carbon-based conductive agents include carbon black such as acetylene black and Ketjen black, graphite, carbon nanotubes, carbon nanofibers, and graphene.
- Two or more conductive agents may be added to the second slurry.
- the ratio of the conductive agent to the solid content of the positive electrode mixture slurry varies somewhat depending on the type of the conductive agent, etc., but for example, it is 0.1 to 8% by mass, preferably 0.2 to 5% by mass, and more. It is preferably 0.5 to 3% by mass. Note that the particle size of the conductive agent is smaller than the particle size of the positive electrode active material.
- a dispersant is an agent that makes it easier to disperse the conductive agent in the dispersion medium.
- a surfactant such as a polymer having a surfactant action, a cationic surfactant, or a nonionic surfactant can be used.
- a dispersant having a nonionic surfactant action that does not inhibit the movement of lithium ions in the battery is preferable.
- Two or more dispersants may be added to the second slurry.
- suitable dispersants include polyvinyl alcohol, polyvinylpyrrolidone, polyalkylene oxide, polyvinyl acetal, polyvinyl ether, cellulose-based polymers, chitins, chitosans, and starch.
- the molecular weight (weight average molecular weight) of the dispersant is not particularly limited, it is 5,000 to 300,000 as an example.
- the content of the dispersing agent in the conductive agent paste can be appropriately adjusted according to the types of the conductive agent, the dispersion medium, and the like.
- the above-mentioned mixer can be used.
- the mixer containing the first slurry used in the first step can be used as it is.
- the mixer or the like is preferably a planetary mixer. In the following, kneading conditions and the like will be described by taking the case of using a planetary mixer as an example.
- the kinetic energy applied to the slurry becomes greater than in the first step and the subsequent third step.
- the rotation speed of the planetary mixer is set higher than the rotation speeds in the first and third steps.
- the stirring time may be shorter than the other steps, but is preferably set longer than the other steps.
- At least the maximum value of kinetic energy applied to the slurry is set larger than in other steps. More preferably, both the maximum value and cumulative value of kinetic energy applied to the slurry are set larger than those in other processes.
- the rotation speed of the planetary mixer is 40 rpm or more and the stirring time is 20 minutes or more.
- An example of a suitable range of rotation speed is 40 to 50 rpm, and an example of a suitable range of stirring time is 25 to 45 minutes.
- the rotational speed of the planetary mixer in the first step is preferably 25 rpm or less, for example 10 to 20 rpm.
- the stirring time in the first step is preferably 15 minutes or less, and an example is 3 to 10 minutes.
- a plurality of (two) kneading patterns with mutually different rotation speeds and stirring times of the planetary mixer are set.
- the number of revolutions of the planetary mixer should be set higher than the number of revolutions in the first and third steps.
- the dispersion medium is added to the second slurry and kneaded to prepare the third slurry.
- Fourth and fifth steps of further dividing and adding the dispersion medium may be provided. agent slurry.
- the slurry is stirred weaker than in the second step to prepare a positive electrode mixture slurry in which the additional dispersion medium is uniformly mixed.
- the solid content concentration of the slurry is adjusted to 80-85% by mass.
- the kneading conditions in the third step are not limited to specific conditions, but the number of revolutions of the planetary mixer is preferably smaller than in the second step.
- the rotation speed of the planetary mixer in the third step is preferably 35 rpm or less, for example higher than that in the first step.
- An example of the rotation speed is 20-30 rpm.
- a plurality of (two) kneading patterns with mutually different rotational speeds and stirring times of the planetary mixer are set.
- the total stirring time in the third step may be longer than in the second step, but from the viewpoint of improving productivity, etc., it is preferable to set it short within the range in which the added dispersion medium is uniformly mixed.
- a dry blend of the positive electrode active material and the binder was added to the dispersion medium and kneaded, but the method of mixing the positive electrode active material, the binder, and the dispersion medium is not limited to this.
- these materials may be added to a mixer or the like at the same time and kneaded.
- a plurality of kneading patterns may be set in the first step, and one kneading pattern may be set in the second and third steps.
- D50 is 10 ⁇ m, lithium nickelate (positive electrode active material), and PVdF are dry blended at a mass ratio of 100: 1 using a planetary mixer (3D-2 type, manufactured by Primix), and then NMP is added. to prepare a first slurry (first step). The solid content concentration of the first slurry was set to 87% by mass. Next, an AB paste in which acetylene black (AB) was previously dispersed in NMP was added to the first slurry and kneaded to prepare a second slurry (second step). AB paste contains polyvinyl alcohol as a dispersant. The solid content concentration of the second slurry was set to 84% by mass. Subsequently, NMP was added to the second slurry and kneaded (third step). Through this series of steps, a positive electrode mixture slurry having a solid content concentration of 83% by mass was prepared.
- the kneading conditions in the first to third steps are as follows. First step Rotation speed: 15 rpm, Stirring time: 5 minutes Second step Rotation speed: 45 rpm, Stirring time: 30 minutes Third step Rotation speed: 25 rpm, Stirring time: 15 minutes After completion of the second step and before adding additional NMP (before the third step), kneading was performed under the conditions of rotation speed: 25 rpm and stirring time: 15 minutes.
- a positive electrode mixture slurry was prepared in the same manner as in Experimental Example 1, except that a kneading step was provided prior to the addition of acetylene black to maximize the kinetic energy applied to the slurry.
- NMP was added to the dry-blended mixture of positive electrode active material and PVdF, and the mixture was kneaded at a rotation speed of 45 rpm for a stirring time of 30 minutes to prepare a first slurry.
- NMP is additionally added, the slurry is kneaded under the conditions of rotation speed: 25 rpm, stirring time: 15 minutes, and the positive electrode having a solid content concentration of 83% by mass.
- a mixture slurry was prepared.
- FIG. 2 shows the relationship between shear rate and shear viscosity.
- a positive electrode mixture slurry in which the dilatancy phenomenon was suppressed was able to be obtained as the shear viscosity decreased as the shear rate increased.
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Abstract
Description
第1工程では、上記の通り、正極活物質と、バインダーと、分散媒とを混錬して第1スラリーを調製する。即ち、導電剤をスラリーに添加する前に、正極活物質とバインダーを分散媒中に分散する。第1スラリーの固形分濃度は、最終的に得られる正極合剤スラリーの固形分濃度よりも高く、好ましくは84~90質量%である。
第2工程では、上記の通り、正極活物質とバインダーを含む第1スラリーに、導電剤と分散剤を添加して混錬し、第2スラリーを調製する。導電剤は、予め所定の分散媒に分散されたペーストの状態で供給されることが好ましい。なお、ペーストには分散剤が含まれている。所定の分散媒は、第1スラリーの分散媒と異なっていてもよいが、互いに混和することが好ましい。第2スラリーの固形分濃度は、第1スラリーの固形分濃度と同様であるか、やや低く、好ましくは81~86質量%である。第2工程では、第1工程と比較して、スラリーに加わる運動エネルギーが大きくなるように、スラリーが強く長時間撹拌されることが好ましい。
第3工程では、上記の通り、第2スラリーに分散媒を追加して混錬し、第3スラリーを調製する。分散媒をさらに分割して追加する第4、第5の工程を設けてもよいが、本実施形態では、第3工程で調製される第3スラリーが、正極芯体に塗工される正極合剤スラリーとなる。スラリーは第2工程よりも弱く撹拌され、追加の分散媒が均一に混ざった正極合剤スラリーを調製する。第3工程では、例えば、スラリーの固形分濃度が80~85質量%に調整される。
D50が10μm、ニッケル酸リチウム(正極活物質)と、PVdFとを、プラネタリーミキサー(プライミクス製、3D-2型)を用いて、100:1の質量比でドライブレンドした後、NMPを投入して混錬し、第1スラリーを調製した(第1工程)。第1スラリーの固形分濃度は、87質量%とした。次に、アセチレンブラック(AB)がNMPに予め分散されたABペーストを第1スラリーに添加して混錬し、第2スラリーを調製した(第2工程)。ABペーストは、分散剤としてポリビニルアルコールを含む。第2スラリーの固形分濃度は、84質量%とした。続いて、第2スラリーにNMPを追加投入して混錬した(第3工程)。この一連の工程により、固形分濃度が83質量%の正極合剤スラリーを調製した。
第1工程・・・回転数:15rpm、撹拌時間:5分
第2工程・・・回転数:45rpm、撹拌時間:30分
第3工程・・・回転数:25rpm、撹拌時間:15分
なお、第2工程終了後、追加のNMPを投入する前(第3工程の前)に、回転数:25rpm、撹拌時間:15分の条件で混錬を行った。
アセチレンブラックの添加前に、スラリーに加わる運動エネルギーが最大となる混錬工程を設けたこと以外は、実験例1と同様にして正極合剤スラリーを調製した。具体的には、ドライブレンドした正極活物質とPVdFの上記混合物にNMPを投入し、回転数:45rpm、撹拌時間:30分の条件で混錬して、第1スラリーを調製した。次に、上記ABペーストを第1スラリーに添加した後、NMPを追加投入し、回転数:25rpm、撹拌時間:15分の条件でスラリーを混錬して、固形分濃度が83質量%の正極合剤スラリーを調製した。
Claims (4)
- 正極活物質と、バインダーと、分散媒とを混錬して第1スラリーを調製する第1工程と、
前記第1スラリーに導電剤と分散剤を添加して混錬し、第2スラリーを調製する第2工程と、
を含み、
前記第2工程では、他の工程よりもスラリーに加わる運動エネルギーを大きくする、正極合剤スラリーの製造方法。 - 前記第2スラリーに前記分散媒を追加して混錬し、第3スラリーを調製する第3工程をさらに含む、請求項1に記載の製造方法。
- 前記第3工程では、前記第3スラリーの固形分濃度を80質量%以上に調整する、請求項2に記載の製造方法。
- 少なくとも前記第2工程では、プラネタリーミキサーを用いてスラリーを混錬する、請求項1~3のいずれか一項に記載の製造方法。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202380021852.6A CN118696430A (zh) | 2022-02-25 | 2023-02-22 | 正极合剂浆料的制造方法 |
| EP23760012.7A EP4485566A4 (en) | 2022-02-25 | 2023-02-22 | METHOD FOR PRODUCING A POSITIVE ELECTRODE MIXTURE SUSPENSION |
| US18/838,394 US20250239591A1 (en) | 2022-02-25 | 2023-02-22 | Method for producing positive electrode mixture slurry |
| JP2024503192A JPWO2023163013A1 (ja) | 2022-02-25 | 2023-02-22 |
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| JP2022027668 | 2022-02-25 |
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| WO2023163013A1 true WO2023163013A1 (ja) | 2023-08-31 |
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| PCT/JP2023/006379 Ceased WO2023163013A1 (ja) | 2022-02-25 | 2023-02-22 | 正極合剤スラリーの製造方法 |
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| US (1) | US20250239591A1 (ja) |
| EP (1) | EP4485566A4 (ja) |
| JP (1) | JPWO2023163013A1 (ja) |
| CN (1) | CN118696430A (ja) |
| WO (1) | WO2023163013A1 (ja) |
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| WO2008108360A1 (ja) * | 2007-03-05 | 2008-09-12 | Toyo Ink Mfg. Co., Ltd. | 電池用組成物 |
| JP2010238388A (ja) * | 2009-03-30 | 2010-10-21 | Fdk Corp | 非水電解液蓄電素子の電極製造方法、および非水電解液蓄電素子 |
| JP2013196804A (ja) * | 2012-03-16 | 2013-09-30 | Toyo Ink Sc Holdings Co Ltd | 合材スラリーおよびその製造方法とそれを用いた電極、電池 |
| JP2014022127A (ja) * | 2012-07-13 | 2014-02-03 | Sony Corp | 正極およびその製造方法、電池、電池パック、電子機器、電動車両、蓄電装置ならびに電力システム |
| JP2017502488A (ja) * | 2014-01-13 | 2017-01-19 | デュラセル、ユーエス、オペレーションズ、インコーポレーテッド | カソードスラリを製造する方法およびカソード |
| JP2019192540A (ja) * | 2018-04-26 | 2019-10-31 | 株式会社エンビジョンAescエナジーデバイス | リチウムイオン二次電池用電極製造用ペーストの製造方法、リチウムイオン二次電池用電極の製造方法、リチウムイオン二次電池用電極およびリチウムイオン二次電池 |
| JP2020045462A (ja) | 2018-09-21 | 2020-03-26 | Fdk株式会社 | 塗工材料の製造方法 |
| WO2020194385A1 (ja) * | 2019-03-22 | 2020-10-01 | 株式会社 東芝 | 電極、電池及び電池パック |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5561559B2 (ja) * | 2011-10-06 | 2014-07-30 | トヨタ自動車株式会社 | リチウム二次電池の製造方法 |
-
2023
- 2023-02-22 JP JP2024503192A patent/JPWO2023163013A1/ja active Pending
- 2023-02-22 US US18/838,394 patent/US20250239591A1/en active Pending
- 2023-02-22 EP EP23760012.7A patent/EP4485566A4/en active Pending
- 2023-02-22 CN CN202380021852.6A patent/CN118696430A/zh active Pending
- 2023-02-22 WO PCT/JP2023/006379 patent/WO2023163013A1/ja not_active Ceased
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| WO2008108360A1 (ja) * | 2007-03-05 | 2008-09-12 | Toyo Ink Mfg. Co., Ltd. | 電池用組成物 |
| JP2010238388A (ja) * | 2009-03-30 | 2010-10-21 | Fdk Corp | 非水電解液蓄電素子の電極製造方法、および非水電解液蓄電素子 |
| JP2013196804A (ja) * | 2012-03-16 | 2013-09-30 | Toyo Ink Sc Holdings Co Ltd | 合材スラリーおよびその製造方法とそれを用いた電極、電池 |
| JP2014022127A (ja) * | 2012-07-13 | 2014-02-03 | Sony Corp | 正極およびその製造方法、電池、電池パック、電子機器、電動車両、蓄電装置ならびに電力システム |
| JP2017502488A (ja) * | 2014-01-13 | 2017-01-19 | デュラセル、ユーエス、オペレーションズ、インコーポレーテッド | カソードスラリを製造する方法およびカソード |
| JP2019192540A (ja) * | 2018-04-26 | 2019-10-31 | 株式会社エンビジョンAescエナジーデバイス | リチウムイオン二次電池用電極製造用ペーストの製造方法、リチウムイオン二次電池用電極の製造方法、リチウムイオン二次電池用電極およびリチウムイオン二次電池 |
| JP2020045462A (ja) | 2018-09-21 | 2020-03-26 | Fdk株式会社 | 塗工材料の製造方法 |
| WO2020194385A1 (ja) * | 2019-03-22 | 2020-10-01 | 株式会社 東芝 | 電極、電池及び電池パック |
Non-Patent Citations (1)
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Also Published As
| Publication number | Publication date |
|---|---|
| CN118696430A (zh) | 2024-09-24 |
| US20250239591A1 (en) | 2025-07-24 |
| JPWO2023163013A1 (ja) | 2023-08-31 |
| EP4485566A4 (en) | 2025-11-12 |
| EP4485566A1 (en) | 2025-01-01 |
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