WO2024262182A1 - 被覆活物質、正極材料、および電池 - Google Patents

被覆活物質、正極材料、および電池 Download PDF

Info

Publication number
WO2024262182A1
WO2024262182A1 PCT/JP2024/017531 JP2024017531W WO2024262182A1 WO 2024262182 A1 WO2024262182 A1 WO 2024262182A1 JP 2024017531 W JP2024017531 W JP 2024017531W WO 2024262182 A1 WO2024262182 A1 WO 2024262182A1
Authority
WO
WIPO (PCT)
Prior art keywords
active material
solid electrolyte
positive electrode
coated active
battery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2024/017531
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
敬太 水野
裕太 杉本
和弥 橋本
出 佐々木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Panasonic Holdings Corp
Original Assignee
Toyota Motor Corp
Panasonic Holdings Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp, Panasonic Holdings Corp filed Critical Toyota Motor Corp
Priority to JP2025527557A priority Critical patent/JPWO2024262182A1/ja
Priority to EP24825591.1A priority patent/EP4734171A1/en
Priority to CN202480034951.2A priority patent/CN121195356A/zh
Publication of WO2024262182A1 publication Critical patent/WO2024262182A1/ja
Priority to US19/421,951 priority patent/US20260106215A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
    • H01M10/0562—Solid materials
    • 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
    • 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
    • H01M4/362—Composites
    • H01M4/366—Composites as layered products
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0017—Non-aqueous electrolytes
    • H01M2300/0065—Solid electrolytes
    • H01M2300/0068—Solid electrolytes inorganic
    • H01M2300/008—Halides
    • 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

  • This disclosure relates to coated active materials, positive electrode materials, and batteries.
  • Patent Document 1 discloses a positive electrode material including a positive electrode active material and a first solid electrolyte material that covers at least a portion of the surface of the positive electrode active material.
  • the first solid electrolyte material includes Li, Ti, M1, and F, and M1 is at least one element selected from the group consisting of Ca, Mg, Al, Y, and Zr.
  • Non-Patent Document 1 describes that when a layered positive electrode material is heated, moisture generated from the positive electrode material can exist in various forms, such as adsorbed water on the surface of the positive electrode material, adsorbed water, and a reaction product between CO2 and the positive electrode material.
  • the coated active material of the present disclosure is A positive electrode active material; a coating material including a first solid electrolyte and coating at least a portion of a surface of the positive electrode active material;
  • a coated active material comprising:
  • the first solid electrolyte comprises Li, M, and X;
  • M is at least one element selected from the group consisting of metal elements other than Li and metalloid elements;
  • X is a halogen element;
  • FIG. 1 is a cross-sectional view showing a schematic configuration of a coated active material according to a first embodiment.
  • FIG. 2 is a cross-sectional view showing a schematic configuration of a positive electrode material according to the second embodiment.
  • FIG. 3 is a cross-sectional view showing a schematic configuration of a battery according to the third embodiment.
  • the solid electrolyte may be oxidized and decomposed during charging of the battery. Oxidative decomposition tends to occur easily when a solid electrolyte with poor oxidation stability, such as a sulfide solid electrolyte, is used. To address this issue, it has been proposed to coat the surface of the positive electrode active material with a coating material containing a solid electrolyte with excellent oxidation stability, such as a halide solid electrolyte.
  • Coated active material 1 is a cross-sectional view showing a schematic configuration of a coated active material in embodiment 1.
  • Coated active material 100 in embodiment 1 includes a positive electrode active material 11 and a coating material 12.
  • Coating material 12 includes a first solid electrolyte, and coats at least a portion of the surface of positive electrode active material 11.
  • ppm means mass fraction, i.e., wtppm (mass/mass).
  • the second solid electrolyte described later is a highly hydrophilic solid electrolyte such as a sulfide solid electrolyte
  • moisture may be desorbed from the surface of the coated active material 100 even when it comes into contact with the second solid electrolyte.
  • the desorbed moisture may cause a side reaction with another material present in the vicinity of the coated active material 100, thereby forming a reaction layer at the interface between the two.
  • the other material may be, for example, a second solid electrolyte described below.
  • the coated active material it was thought that it was desirable for the coated active material to contain as little water as possible. This was because it was thought that a part of the coating layer would be altered by the reaction of the lithium-containing fluoride, such as Li 2.7 Ti 0.3 Al 0.7 F 6 , contained in the coating layer with the water contained in the coating active material, and the altered part would function as a resistance layer at the interface between the positive electrode active material and the coating layer.
  • the inventors' study newly revealed that it is rather desirable for the coated active material to contain a very small amount of water.
  • the moisture content MC 120 satisfies 0 ppm ⁇ MC 120 ⁇ 600 ppm, there is a sufficient amount of moisture near the surface of the coated active material 100 in order to form a reaction layer having an appropriate thickness at the interface between the two when the coated active material 100 and the second solid electrolyte described later are mixed to prepare a positive electrode material. If the moisture content MC 120 is greater than 60 ppm, the thickness of the reaction layer formed will increase, which will result in a larger side surface as the above-mentioned resistance layer, leading to a significantly higher resistance of the battery, and is therefore not preferable.
  • the reaction layer is formed by the reaction of moisture with the second solid electrolyte.
  • the water content MC 120 can be measured, for example, by the Karl Fischer method.
  • the water content MC 120 can be determined as follows using a Karl Fischer device (Karl Fischer moisture meter).
  • coated active material 100 which is the measurement sample
  • the introduction section of the coated active material 100 is pre-baked at 300°C to stabilize the device.
  • Coated active material 100 which is the measurement sample” refers to a particle group of coated active material 100.
  • the temperature of the inlet After the device has stabilized, set the temperature of the inlet to 120°C. When the temperature of the inlet reaches 120°C, measure the background amount of water released ( ⁇ g/sec).
  • the temperature of the introduction part is set to 25°C.
  • the measurement sample is introduced into the introduction part.
  • the measurement sample is heated from 25°C to 120°C at a temperature increase rate of 10°C per minute to vaporize the moisture contained in the measurement sample.
  • the vaporized moisture is quantified by coulometric titration until it reaches a value equal to or less than the background moisture release amount, and then integrated to obtain the integrated value of the moisture amount released from the measurement sample.
  • the integrated value of the moisture amount is divided by the total mass of the measurement sample to obtain the moisture amount MC120 .
  • the degree of increase in the resistance of the battery is expressed by the index "( R2 / R1 ) x 100 (%)".
  • ( R2 / R1 ) is the value obtained by dividing the resistance R2 after the durability test by the resistance R1 before the durability test.
  • the durability test is, for example, a test in which the battery is stored in a high-temperature environment for a certain period of time.
  • the resistance R1 and the resistance R2 can be obtained by the following method. A battery made using a positive electrode material containing the coated active material 100 is placed in a thermostatic chamber at 25°C and charged and discharged. Next, charging and discharging are performed to a predetermined voltage. Then, constant current discharge is performed at a predetermined current value for a range of 1 second to 10 seconds.
  • the voltage drop at this time that is, the difference between the open circuit voltage before discharge and the open circuit voltage at the end of discharge is divided by the discharge current value to obtain the resistance R1 before the durability test.
  • the durability test is performed under appropriate conditions. After the durability test, the charging and discharging process is performed in the same manner as described above. Next, charging and discharging are performed to a predetermined voltage. Then, a constant current discharge is performed at a predetermined current value for 1 to 10 seconds. The voltage drop at this time is divided by the discharge current value to obtain the resistance R2 after the durability test.
  • the moisture content MC 120 may satisfy MC 120 ⁇ 500 ppm.
  • the water content MC 120 may satisfy MC 120 ⁇ 490 ppm, MC 120 ⁇ 480 ppm, MC 120 ⁇ 470 ppm, or even MC 120 ⁇ 464 ppm. According to such a configuration, as a result, an increase in resistance in the initial stage of the battery can be further suppressed.
  • the moisture content MC 120 may satisfy 0.5 ppm ⁇ MC 120 , and may further satisfy 1 ppm ⁇ MC 120.
  • the water content MC 120 may satisfy 5 ppm ⁇ MC 120 , 10 ppm ⁇ MC 120 , 20 ppm ⁇ MC 120 , or further may satisfy 24 ppm ⁇ MC 120. With this configuration, an increase in the resistance of the battery can be further suppressed.
  • the water content MC 120 may satisfy 30 ppm ⁇ MC 120 , and may further satisfy 34 ppm ⁇ MC 120. With this configuration, an increase in the resistance of the battery can be further suppressed.
  • the water content MC 120 may satisfy 100 ppm ⁇ MC 120 , may satisfy 200 ppm ⁇ MC 120 , or may further satisfy 300 ppm ⁇ MC 120.
  • the water content MC 120 may satisfy 300 ppm ⁇ MC 120 ⁇ 600 ppm. With this configuration, an increase in the resistance of the battery can be further suppressed.
  • the coating material 12 is in direct contact with the positive electrode active material 11.
  • the coating material 12 includes a first solid electrolyte.
  • the first solid electrolyte has ion conductivity.
  • the ion conductivity is typically lithium ion conductivity.
  • the first solid electrolyte contains Li, M, and X.
  • M is at least one element selected from the group consisting of metal elements other than Li and metalloid elements.
  • X is a halogen element.
  • the first solid electrolyte having such a composition has excellent oxidation resistance. Therefore, it is possible to suppress oxidation of the second solid electrolyte in contact with the positive electrode active material 11. This makes it possible to suppress an increase in the resistance of the battery.
  • metal elements include B, Si, Ge, As, Sb, and Te.
  • Metal elements include all elements in groups 1 to 12 of the periodic table except hydrogen, and all elements in groups 13 to 16 except B, Si, Ge, As, Sb, Te, C, N, P, O, S, and Se.
  • metal elements are a group of elements that can become cations when forming an inorganic compound with a halogen element.
  • the first solid electrolyte contains a halogen element.
  • a solid electrolyte containing a halogen element is also called a halide solid electrolyte.
  • a halide solid electrolyte has excellent oxidation resistance.
  • X may be F.
  • a halide solid electrolyte containing F has excellent oxidation resistance due to the high electronegativity of F. Therefore, by covering at least a portion of the surface of the positive electrode active material 11 with the coating material 12 containing the first solid electrolyte, oxidation of the second solid electrolyte in contact with the positive electrode active material 11 can be further suppressed. This can further suppress an increase in the resistance of the battery.
  • M may include M1 and M2.
  • M1 may be at least one selected from the group consisting of Ti and Zr
  • M2 may be at least one selected from the group consisting of Al, Y, Mg, and Ca.
  • a cationic framework structure suitable for ion conduction may be formed in the crystal lattice. Therefore, the first solid electrolyte exhibits high ion conductivity.
  • the high ion conductivity is, for example, 1.0 ⁇ 10 ⁇ 8 S/cm or more. That is, the first solid electrolyte may have, for example, an ion conductivity of 1.0 ⁇ 10 ⁇ 8 S/cm or more.
  • M2 may be Al.
  • a first solid electrolyte having such a composition exhibits even higher ionic conductivity.
  • M1 may be Ti.
  • a first solid electrolyte having such a composition exhibits even higher ionic conductivity.
  • the first solid electrolyte may consist essentially of Li, Ti, Al, and F.
  • the first solid electrolyte consists essentially of Li, Ti, Al, and F
  • the molar ratio (i.e., molar fraction) of the total amount of substance of Li, Ti, Al, and F to the total amount of substance of all elements constituting the first solid electrolyte is 90% or more.
  • the molar ratio (i.e., molar fraction) may be 95% or more.
  • the first solid electrolyte may consist only of Li, Ti, Al, and F.
  • the first solid electrolyte may be represented by the following composition formula (1):
  • M3 is at least one selected from the group consisting of Zr, Ni, Fe, and Cr
  • m is the valence of M3, and satisfies 0.1 ⁇ x ⁇ 0.9, 0 ⁇ y ⁇ 0.1, 0 ⁇ z ⁇ 0.1, and 0.8 ⁇ b ⁇ 1.2.
  • a first solid electrolyte having such a composition has high ionic conductivity and can be produced by a method with high industrial productivity.
  • composition formula (1) 0.1 ⁇ x ⁇ 0.7 may be satisfied.
  • the upper and lower limits of the range of x in composition formula (1) can be defined by any combination selected from the following values: 0.1, 0.3, 0.4, 0.5, 0.6, 0.65, 0.67, 0.7, 0.8, and 0.9.
  • the first solid electrolyte may be crystalline or amorphous.
  • the shape of the first solid electrolyte is not particularly limited.
  • the shape of the first solid electrolyte is, for example, needle-like, spherical, or elliptical.
  • the shape of the first solid electrolyte may be particulate.
  • the first solid electrolyte When the shape of the first solid electrolyte is, for example, particulate (e.g., spherical), the first solid electrolyte may have a median diameter of 0.01 ⁇ m or more and 100 ⁇ m or less.
  • volume size refers to the particle size when the cumulative volume in the volume-based particle size distribution is equal to 50%.
  • the volume-based particle size distribution is measured, for example, by a laser diffraction measuring device or an image analyzer.
  • the coating material 12 does not have to contain sulfur.
  • the shape of the coating material 12 itself is not particularly limited.
  • a thin film formed by the accumulation of fine particles of the coating material 12, such as a plate-like, needle-like, spherical, or elliptical sphere, may cover at least a portion of the surface of the positive electrode active material 11.
  • the positive electrode active material 11 includes a material having a property of absorbing and releasing metal ions (e.g., lithium ions).
  • a lithium-containing transition metal oxide, a transition metal fluoride, a polyanion material, a fluorinated polyanion material, a transition metal sulfide, a transition metal oxysulfide, a transition metal oxynitride, or the like can be used.
  • the manufacturing cost of the battery can be reduced and the average discharge voltage of the battery can be improved.
  • the lithium-containing transition metal oxide include Li(Ni,Co,Al) O2 , Li(Ni,Co,Mn) O2 , and LiCoO2 .
  • the positive electrode active material 11 has, for example, a particle shape.
  • the particle shape of the positive electrode active material 11 is not particularly limited.
  • the particle shape of the positive electrode active material 11 can be spherical, oval spherical, scaly, or fibrous.
  • the median diameter of the positive electrode active material 11 may be 0.1 ⁇ m or more and 100 ⁇ m or less.
  • the coated active material 100 and the second solid electrolyte can form a good dispersion state. As a result, the charge and discharge characteristics of the battery are improved.
  • the median diameter of the positive electrode active material 11 is 100 ⁇ m or less, the diffusion speed of lithium inside the positive electrode active material 11 is sufficiently ensured. Therefore, the battery can operate at high output.
  • the positive electrode active material 11 may contain lithium nickel cobalt aluminum oxide.
  • the lithium nickel cobalt aluminum oxide may be Li(Ni,Co,Al)O 2. With this configuration, the energy density of the battery can be increased.
  • Li(Ni,Co,Al) O2 includes those containing at least one additional element in addition to Li, Ni, Co, and Al.
  • the additional element may be at least one or more elements selected from boron (B), sodium (Na), magnesium (Mg), silicon (Si), phosphorus (P), sulfur (S), potassium (K), calcium (Ca), titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), copper (Cu), zinc (Zn), gallium (Ga), germanium (Ge), zirconium (Zr), niobium (Nb), molybdenum (Mo), indium (In), tin (Sn), tungsten (W), lanthanum (La), and cerium (Ce).
  • the first solid electrolyte contained in the coating material 12 can be produced, for example, by the following method.
  • Two or more kinds of raw material powders are prepared so as to have a desired composition.
  • the raw material powders may be mixed in a molar ratio previously adjusted to offset composition changes that may occur in the synthesis process.
  • the mixture of raw material powders may be fired in an inert gas atmosphere to react with each other to obtain reactants.
  • inert gases are helium, nitrogen, or argon.
  • the firing may be performed in a vacuum.
  • the mixture of raw material powders may be placed in a container and fired in a heating furnace.
  • the container may be, for example, a crucible, a sealed container, or a vacuum sealed tube.
  • the coated active material 100 in the first embodiment can be produced, for example, by the following method.
  • a powder of the positive electrode active material 11 and a powder of the coating material 12 containing the first solid electrolyte are prepared in a predetermined mass ratio.
  • a powder of Li(Ni,Co,Al) O2 is prepared as the positive electrode active material 11
  • a powder of Li2.7Al0.7Ti0.3F6 which is the first solid electrolyte
  • the coating material 12 is prepared as the coating material 12.
  • the two materials may be placed in a container, and a shear force may be applied to the two materials using a rotating blade.
  • the two materials may be placed in a container, and the two materials may be collided by a jet stream.
  • the powder of the positive electrode active material 11 and the powder of the coating material 12 are mixed in an appropriate ratio.
  • the mixture Before mechanical energy is applied to the mixture of the powder of the positive electrode active material 11 and the powder of the coating material 12, the mixture may be milled.
  • a mixing device such as a ball mill may be used for the milling process.
  • the milling process may be performed in a dry atmosphere or an inert atmosphere.
  • the coated active material 100 may be manufactured by a dry particle compounding method.
  • the process by the dry particle compounding method includes applying at least one mechanical energy selected from the group consisting of impact, compression, and shear to a mixture of the powder of the positive electrode active material 11 and the powder of the coating material 12.
  • the apparatus used in the manufacture of the coated active material 100 is not particularly limited.
  • the apparatus can be an apparatus capable of applying mechanical energy such as impact, compression, and shear to a mixture of the powder of the positive electrode active material 11 and the powder of the coating material 12.
  • apparatus capable of applying mechanical energy include a ball mill, a jet mill, compression shear processing apparatus (particle composite apparatus) such as "Mechanofusion” (manufactured by Hosokawa Micron Corporation) and "Nobilta” (manufactured by Hosokawa Micron Corporation), "Hybridization System (high-velocity air current impact apparatus)” (manufactured by Nara Machinery Works), and “Balance Gran” (manufactured by Freund Turbo Corporation).
  • Mechanisms is a particle compounding device that uses dry mechanical compounding technology by applying strong mechanical energy to particles of multiple different materials.
  • mechanofusion the powdered raw materials are fed between a rotating container and a press head, and mechanical energy such as compression, shear, and friction is applied to them, causing the particles to compound.
  • Nobilta is a particle compounding device that uses dry mechanical compounding technology, an advanced form of particle compounding technology, to compound nanoparticles as raw materials. Nobilta produces composite particles by applying mechanical energy in the form of impact, compression, and shear to multiple raw material powders.
  • a rotor that is positioned so as to have a specified gap between itself and the inner wall of a horizontal cylindrical mixing vessel rotates at high speed, and the raw material powder is forced to pass through the gap, a process that is repeated multiple times. This applies impact, compression, and shear forces to the mixture, making it possible to produce composite particles of positive electrode active material 11 and coating material 12. Conditions such as the rotor rotation speed, processing time, and feed amount can be adjusted as appropriate.
  • the Balance Gran is equipped with a chopper that stirs the powder in a spiral shape from the outer periphery to the inner periphery, promoting convection, and an agitator scraper that rotates in the opposite direction to the chopper.
  • the action of the chopper and agitator scraper disperses the mixture evenly, making it possible to produce composite particles of the positive electrode active material 11 and the coating material 12.
  • the coated active material 100 may be produced by mixing the powder of the positive electrode active material 11 with the powder of the coating material 12 using a mortar, mixer, or the like.
  • the coating material 12 may be deposited on the surface of the positive electrode active material 11 by various methods such as a spray method, a spray dry coating method, an electrodeposition method, an immersion method, or a mechanical mixing method using a disperser.
  • the moisture content MC120 can be adjusted to the above range (0 ppm ⁇ MC120 ⁇ 600 ppm) by performing the manufacturing process of the coated active material 100 in an environment with low environmental moisture.
  • the manufacturing process of the coated active material 100 may be performed in a dry air environment with a dew point of ⁇ 30° C. or lower.
  • the manufacturing process of the coated active material 100 may be performed in a dry air environment with a dew point of ⁇ 50° C. or lower.
  • the positive electrode active material 11 may be temporarily stored in an environment with low environmental moisture to adjust the moisture content MC 120 to the above range (0 ppm ⁇ MC 120 ⁇ 600 ppm).
  • the positive electrode active material 11 may be stored in a sealed container in a dry air environment with a dew point of ⁇ 30° C. or lower.
  • the positive electrode active material 11 may be stored in a sealed container in a dry air environment with a dew point of ⁇ 50° C. or lower.
  • FIG. 2 is a cross-sectional view showing a schematic configuration of a positive electrode material 200 according to the second embodiment.
  • the positive electrode material 200 includes the coated active material 100 in the first embodiment and the second solid electrolyte 21. Because the positive electrode material 200 includes the coated active material 100, it is suitable for suppressing an increase in the resistance of the battery.
  • the positive electrode active material 11 of the coated active material 100 is separated from the second solid electrolyte 21 by the coating material 12.
  • the positive electrode active material 11 does not need to be in direct contact with the second solid electrolyte 21. This is because the coating material 12 has ionic conductivity.
  • the second solid electrolyte 21 may have a different composition from the first solid electrolyte contained in the coating material 12 of the coated active material 100, or may have the same composition.
  • the second solid electrolyte 21 may include at least one selected from the group consisting of a halide solid electrolyte, a sulfide solid electrolyte, an oxide solid electrolyte, a polymer solid electrolyte, and a complex hydride solid electrolyte.
  • the second solid electrolyte 21 may include a sulfide solid electrolyte.
  • the second solid electrolyte 21 can achieve high ionic conductivity in the positive electrode material 200.
  • halide solid electrolytes examples include Li3REX6, Li3(Al,Ga,In)X6, Li2MgX4, Li2FeX4 , Li ( Al , Ga , In) X4 , and LiI, where X is at least one selected from the group consisting of Cl, Br, and I, and RE is at least one selected from the group consisting of rare earth elements.
  • LiX, Li2O , MOq , and LipMOq may be added to these.
  • the element X in “ LiX” is at least one element selected from the group consisting of F, Cl, Br, and I.
  • the element M in “ MOq " and “ LipMOq " is at least one element selected from the group consisting of P, Si , Ge, B, Al, Ga, In, Fe, and Zn. In “MO q " and " Lip MO q ", p and q are each independent natural numbers.
  • oxide solid electrolytes examples include NASICON-type solid electrolytes such as LiTi2 ( PO4 ) 3 and its elemental substitution products, (LaLi) TiO3 -based perovskite - type solid electrolytes, LISICON-type solid electrolytes such as Li14ZnGe4O16 , Li4SiO4 , LiGeO4 and their elemental substitution products, garnet-type solid electrolytes such as Li7La3Zr2O12 and its elemental substitution products, Li3N and its H- substitution products, Li3PO4 and its N -substitution products, and glasses or glass ceramics based on Li-B- O compounds such as LiBO2 and Li3BO3 to which materials such as Li2SO4 and Li2CO3 have been added.
  • NASICON-type solid electrolytes such as LiTi2 ( PO4 ) 3 and its elemental substitution products
  • LaLi) TiO3 -based perovskite - type solid electrolytes LISICON-type solid
  • the polymer solid electrolyte for example, a compound of a polymer compound and a lithium salt can be used.
  • the polymer compound may have an ethylene oxide structure. By having an ethylene oxide structure, the polymer compound can contain a large amount of lithium salt. Therefore, the ion conductivity can be further increased.
  • the lithium salt for example, LiPF 6 , LiBF 4 , LiSbF 6 , LiAsF 6 , LiSO 3 CF 3 , LiN (SO 2 CF 3 ) 2 , LiN (SO 2 C 2 F 5 ) 2 , LiN (SO 2 CF 3 ) (SO 2 C 4 F 9 ), LiC (SO 2 CF 3 ) 3 , etc.
  • the lithium salt one lithium salt selected from these may be used alone, or a mixture of two or more lithium salts selected from these may be used.
  • the second solid electrolyte 21 may contain two or more materials selected from the materials listed as solid electrolytes.
  • the second solid electrolyte 21 may contain, for example, a halide solid electrolyte and a sulfide solid electrolyte.
  • the second solid electrolyte 21 may contain unavoidable impurities such as starting materials, by-products, and decomposition products used in synthesizing the solid electrolyte.
  • the shape of the second solid electrolyte 21 is not particularly limited and may be needle-like, spherical, elliptical, or the like.
  • the shape of the second solid electrolyte 21 may be particulate.
  • the solid electrolyte 21 When the second solid electrolyte 21 has a particulate (e.g., spherical) shape, the solid electrolyte may have a median diameter of 0.1 ⁇ m or more and 100 ⁇ m or less. When the solid electrolyte has a median diameter in this range, the coated active material 100 and the second solid electrolyte 21 are well dispersed in the positive electrode material 200.
  • a particulate e.g., spherical
  • the median diameter of the second solid electrolyte 21 may be 10 ⁇ m or less. In this case, the dispersion state of the coated active material 100 and the second solid electrolyte 21 in the positive electrode material 200 becomes better.
  • the median diameter of the second solid electrolyte 21 may be smaller than the median diameter of the coated active material 100. In this case, the dispersion state of the coated active material 100 and the second solid electrolyte 21 in the positive electrode material 200 becomes better.
  • the coated active material 100 and the second solid electrolyte 21 may be in contact with each other.
  • the coating material 12 and the second solid electrolyte 21 are in contact with each other.
  • the positive electrode material 200 may contain a plurality of particles of the second solid electrolyte 21 and a plurality of particles of the coated active material 100.
  • the positive electrode material 200 may be a mixture of a powder of the coated active material 100 and a powder of the second solid electrolyte 21.
  • the content of the coated active material 100 and the content of the second solid electrolyte 21 may be the same or different.
  • the positive electrode material 200 may contain a binder for the purpose of improving adhesion between particles.
  • the binder is used to improve the binding of the material that constitutes the positive electrode.
  • binders include polyvinylidene fluoride, polytetrafluoroethylene, polyethylene, polypropylene, aramid resin, polyamide, polyimide, polyamideimide, polyacrylonitrile, polyacrylic acid, polyacrylic acid methyl ester, polyacrylic acid ethyl ester, polyacrylic acid hexyl ester, polymethacrylic acid, polymethacrylic acid methyl ester, polymethacrylic acid ethyl ester, polymethacrylic acid hexyl ester, polyvinyl acetate, polyvinylpyrrolidone, polyether, polycarbonate, polyethersulfone, polyetherketone, polyetheretherketone, polyphenylene sulfide, hexafluoropolypropylene, styren
  • the binder may be an elastomer because of its excellent binding properties.
  • An elastomer is a polymer that has rubber elasticity.
  • the elastomer used as the binder may be a thermoplastic elastomer or a thermosetting elastomer.
  • the binder may contain a thermoplastic elastomer.
  • thermoplastic elastomers examples include styrene-ethylene-butylene-styrene (SEBS), styrene-ethylene-propylene-styrene (SEPS), styrene-ethylene-ethylene-propylene-styrene (SEEPS), butylene rubber (BR), isoprene rubber (IR), chloroprene rubber (CR), acrylonitrile-butadiene rubber (NBR), styrene-butylene rubber (SBR), styrene-butadiene-styrene (SBS), styrene-isoprene-styrene (SIS), hydrogenated isoprene rubber (HIR), hydrogenated butyl rubber (HIIR), hydrogenated nitrile rubber (HNBR), hydrogenated styrene-butylene rubber (HSBR), polyvinylidene fluoride (PVdF), polytetrafluoroethylene (PTFE), etc.
  • the positive electrode material 200 may contain a conductive additive for the purpose of increasing electronic conductivity.
  • conductive additives include graphites such as natural graphite or artificial graphite, carbon blacks such as acetylene black and ketjen black, conductive fibers such as carbon fiber or metal fiber, metal powders such as carbon fluoride and aluminum, conductive whiskers such as zinc oxide or potassium titanate, conductive metal oxides such as titanium oxide, and conductive polymer compounds such as polyaniline, polypyrrole, and polythiophene.
  • the above-mentioned conductive additive may be contained in the coating material 12 of the coated active material 100.
  • the positive electrode material 200 is obtained by mixing the coated active material 100 and the second solid electrolyte 21.
  • the method of mixing the coated active material 100 and the second solid electrolyte 21 is not particularly limited.
  • the coated active material 100 and the second solid electrolyte 21 may be mixed using a tool such as a mortar, or the coated active material 100 and the second solid electrolyte 21 may be mixed using a mixing device such as a ball mill.
  • the battery in embodiment 3 includes a positive electrode, a separator section, and a negative electrode.
  • the separator section is located between the positive electrode and the negative electrode.
  • the positive electrode includes the positive electrode material 200 in embodiment 2. With this configuration, an increase in the resistance of the battery is suppressed, improving the durability of the battery.
  • the separator portion may be an electrolyte layer containing a solid electrolyte, or a separator impregnated with an electrolyte solution.
  • FIG. 3 is a cross-sectional view showing the schematic configuration of battery 300 in embodiment 3.
  • the battery 300 includes a positive electrode 31, an electrolyte layer 32, and a negative electrode 33.
  • the electrolyte layer 32 is disposed between the positive electrode 31 and the negative electrode 33.
  • the separator portion is the electrolyte layer 32.
  • the positive electrode 31 includes the positive electrode material 200 in the second embodiment. With this configuration, an increase in the resistance of the battery 300 is suppressed, improving the durability of the battery 300.
  • the thickness of each of the positive electrode 31 and the negative electrode 33 may be 10 ⁇ m or more and 500 ⁇ m or less. If the thickness of the positive electrode 31 and the negative electrode 33 is 10 ⁇ m or more, a sufficient energy density of the battery 300 can be ensured. If the thickness of the positive electrode 31 and the negative electrode 33 is 500 ⁇ m or less, high-output operation of the battery 300 can be achieved.
  • the electrolyte layer 32 is a layer containing an electrolyte material.
  • the electrolyte layer 32 may contain at least one solid electrolyte selected from the group consisting of a sulfide solid electrolyte, an oxide solid electrolyte, a halide solid electrolyte, a polymer solid electrolyte, and a complex hydride solid electrolyte. Details of each solid electrolyte are as described in the second embodiment.
  • the thickness of the electrolyte layer 32 may be 1 ⁇ m or more and 300 ⁇ m or less. When the thickness of the electrolyte layer 32 is 1 ⁇ m or more, the positive electrode 31 and the negative electrode 33 can be more reliably separated. When the thickness of the electrolyte layer 32 is 300 ⁇ m or less, the battery 300 can be operated at high output.
  • the negative electrode 33 contains a material as the negative electrode active material that has the property of absorbing and releasing metal ions (e.g., lithium ions).
  • metal ions e.g., lithium ions
  • the median diameter of the particles of the negative electrode active material may be 0.1 ⁇ m or more and 100 ⁇ m or less.
  • the negative electrode 33 may contain other materials, such as a solid electrolyte.
  • the material described in embodiment 2 can be used as the solid electrolyte.
  • the battery 300 can be configured as a battery of various shapes, such as a coin type, a cylindrical type, a square type, a sheet type, a button type, a flat type, or a laminated type.
  • a positive electrode active material comprising:
  • the first solid electrolyte comprises Li, M, and X;
  • M is at least one element selected from the group consisting of metal elements other than Li and metalloid elements;
  • X is a halogen element;
  • the coated active material of Technology 1 can suppress the increase in battery resistance.
  • the first solid electrolyte is represented by the following composition formula (1): Li 6-(4-x-4y+my)b (Ti 1-xy Al x M3 y ) b F 6-2z O z ...(1)
  • M3 is at least one selected from the group consisting of Zr, Ni, Fe, and Cr, and m is the valence of M3; 0.1 ⁇ x ⁇ 0.9, 0 ⁇ y ⁇ 0.1, 0 ⁇ z ⁇ 0.1, and 0.8 ⁇ b ⁇ 1.2, 10.
  • the coated active material according to any one of claims 1 to 9, which satisfies the above. According to this configuration, the first solid electrolyte has high ionic conductivity and can be produced by a method with high industrial productivity.
  • the coated active material according to any one of techniques 1 to 11, A second solid electrolyte having a different composition from the first solid electrolyte;
  • the positive electrode material comprises:
  • the positive electrode material of Technology 12 contains a coated active material, making it suitable for suppressing an increase in battery resistance.
  • the battery of Technology 14 suppresses the increase in battery resistance, improving the durability of the battery.
  • a positive electrode comprising the positive electrode material according to technology 12; A negative electrode; an electrolyte layer disposed between the positive electrode and the negative electrode; Equipped with a battery.
  • the battery of Technology 15 suppresses the increase in battery resistance, improving the durability of the battery.
  • Example 1 Li(NiCoAl)O 2 (hereinafter, abbreviated as NCA) having a median diameter of 5 ⁇ m was used.
  • NCA Li(NiCoAl)O 2
  • NCA as a positive electrode active material
  • LTAF a coating material
  • a thin film of LTAF was formed by compression shear processing using a particle composite device (NOB-MINI, manufactured by Hosokawa Micron Corporation). Specifically, NCA and LTAF were weighed to have a weight ratio of 97.3:2.7, and processed under the conditions of blade clearance: 2 mm, rotation speed: 6000 rpm, and processing time: 50 minutes. As a result, a thin film was formed by coating LTAF on the surface of NCA. Thereafter, the amount of moisture contained in the coated active material was adjusted by leaving it to stand for 48 hours in a draft chamber at a temperature of about 20°C and a humidity of about 20%. As a result, the coated active material of Example 1 was obtained.
  • LPS Li 2 S-P 2 S 5
  • the obtained LPS was used as the second solid electrolyte of Example 1.
  • Example 2 After coating the surface of the NCA with LTAF, the coated active material was left to stand for 5 minutes in a dry air environment with a temperature of about 20° C. and a dew point of about ⁇ 30° C. to adjust the moisture content of the coated active material. Except for this, the coated active material of Example 2 was obtained in the same manner as in Example 1. The positive electrode material of Example 2 was produced in the same manner as in Example 1 using the coated active material of Example 2.
  • Example 3 After coating the surface of the NCA with LTAF, the coated active material was left to stand for 1 hour in a dry air environment with a temperature of about 20° C. and a dew point of about ⁇ 30° C. to adjust the moisture content of the coated active material. Except for this, the coated active material of Example 3 was obtained in the same manner as in Example 1. The positive electrode material of Example 3 was produced in the same manner as in Example 1 using the coated active material of Example 3.
  • Example 4 After coating the surface of the NCA with LTAF, the coated active material was left to stand for 6 hours in a dry air environment with a temperature of about 20° C. and a dew point of about ⁇ 30° C., thereby adjusting the moisture content of the coated active material. Except for this, the coated active material of Example 4 was obtained in the same manner as in Example 1. The positive electrode material of Example 4 was produced in the same manner as in Example 1 using the coated active material of Example 4.
  • Example 5 After coating the surface of the NCA with LTAF, the coated active material was left to stand for 12 hours in a dry air environment with a temperature of about 20° C. and a dew point of about ⁇ 30° C., thereby adjusting the moisture content of the coated active material. Except for this, the coated active material of Example 5 was obtained in the same manner as in Example 1. The positive electrode material of Example 5 was produced in the same manner as in Example 1 using the coated active material of Example 5.
  • Example 6 After coating the surface of the NCA with LTAF, the coated active material was left to stand for 24 hours in a draft chamber at a temperature of about 20° C. and a humidity of about 20%, to adjust the moisture content of the coated active material. Except for this, the coated active material of Example 6 was obtained in the same manner as in Example 1. The positive electrode material of Example 6 was produced in the same manner as in Example 1 using the coated active material of Example 6.
  • Comparative Example 1 The material in which LTAF was coated on the surface of NCA was used as the coated active material of Comparative Example 1. That is, in Comparative Example 1, after the surface of NCA was coated with LTAF, the moisture content was not adjusted.
  • the positive electrode material of Comparative Example 1 was produced using the coated active material of Comparative Example 1 in the same manner as in Example 1.
  • the moisture content MC120 was determined by the Karl Fischer method described in embodiment 1.
  • a Karl Fischer moisture meter (HIRANUMA Corporation, EV-2010) was used to measure the moisture content of the coated active materials. The results are shown in Table 1.
  • the moisture content MC 120 of the coated active material of Comparative Example 1 was 0 ppm. This indicates that the moisture content of the coated active material of Comparative Example 1 was below the detection limit of the Karl Fischer moisture meter.
  • the positive electrode material was weighed so that it contained 5 mg of NCA.
  • the LPS and the positive electrode material were laminated in this order inside an insulating outer cylinder.
  • the resulting laminate was pressure-molded at a pressure of 720 MPa.
  • metallic lithium was placed so as to be in contact with the LPS layer, and pressure-molded again at a pressure of 40 MPa.
  • stainless steel current collectors were placed above and below the laminate. Current collector leads were attached to each current collector.
  • the outer cylinder was sealed using an insulating ferrule to isolate the inside of the outer cylinder from the outside atmosphere.
  • the battery was placed in a thermostatic chamber at 25°C.
  • the battery was charged at a constant current of 50 ⁇ A, which corresponds to a 0.05C rate (20 hour rate) relative to the theoretical capacity of the battery, until the voltage reached 4.25V.
  • the battery was then discharged at a constant current of 50 ⁇ A, which corresponds to a 0.05C rate (20 hour rate) relative to the theoretical capacity of the battery, until the voltage reached 3.75V.
  • the battery was then discharged at a constant current of 46.4mA, which corresponds to a 46.4C rate relative to the theoretical capacity of the battery, for 2 seconds.
  • the voltage drop at this time was divided by the discharge current value to determine the resistance R1 before the durability test.
  • the temperature of the thermostatic chamber was changed to 25°C, and the battery was charged at a constant current of 50 ⁇ A, which is a 0.05 C rate (20 hour rate) relative to the theoretical capacity of the battery, until the voltage reached 4.25 V.
  • the battery was then discharged at a constant current of 50 ⁇ A, which is a 0.05 C rate (20 hour rate) relative to the theoretical capacity of the battery, until the voltage reached 3.75 V.
  • a constant current discharge was performed for 2 seconds at a current value of 46.4 mA, which is a 46.4 C rate relative to the theoretical capacity of the battery.
  • the resistance R2 after the durability test was calculated by dividing the voltage drop at this time by the discharge current value.
  • the resistance R2 after the durability test was divided by the resistance R1 before the durability test, ie, ( R2 / R1 ) x 100 (%), is shown in Table 1.
  • Example 2 Comparative Example 1
  • an increase in the resistance of the battery is suppressed when the moisture content MC120 is 1 ppm or more. This is presumably because the homogeneity of the reaction layer formed on the surface of the coated active material is improved when the coated active material and the second solid electrolyte are mixed.
  • Example 3 Comparing Example 3 with Example 2 and Comparative Example 1, it is understood that when the moisture content MC120 is 20 ppm or more, the increase in the resistance of the battery is further suppressed. This is presumably because the homogeneity of the reaction layer formed on the surface of the coated active material is further improved when the coated active material and the second solid electrolyte are mixed.
  • Example 5 Comparing Example 5 with Examples 2 to 4 and Comparative Example 1, it is understood that when the moisture content MC120 is 50 ppm or more, the increase in the resistance of the battery is further suppressed. This is presumably because the thickness of the reaction layer formed on the surface of the coated active material becomes relatively thick when the coated active material and the second solid electrolyte are mixed.
  • the moisture content MC120 is the amount of moisture desorbed from the coated active material 100 in a relatively low temperature range up to 120° C. It is presumed that the moisture is mainly moisture physically adsorbed on the surface of the coated active material 100. Therefore, it is presumed that the same tendency as the result of this example will be observed even when, for example, Li(NiCoMn)O 2 or LiCoO 2 other than NCA is used as the positive electrode active material.
  • the technology disclosed herein is useful, for example, in lithium secondary batteries.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)
PCT/JP2024/017531 2023-06-21 2024-05-10 被覆活物質、正極材料、および電池 Ceased WO2024262182A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2025527557A JPWO2024262182A1 (https=) 2023-06-21 2024-05-10
EP24825591.1A EP4734171A1 (en) 2023-06-21 2024-05-10 Coated active substance, positive electrode material, and battery
CN202480034951.2A CN121195356A (zh) 2023-06-21 2024-05-10 被覆活性物质、正极材料、以及电池
US19/421,951 US20260106215A1 (en) 2023-06-21 2025-12-16 Coated active material, positive electrode material, and battery

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023101890 2023-06-21
JP2023-101890 2023-06-21

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US19/421,951 Continuation US20260106215A1 (en) 2023-06-21 2025-12-16 Coated active material, positive electrode material, and battery

Publications (1)

Publication Number Publication Date
WO2024262182A1 true WO2024262182A1 (ja) 2024-12-26

Family

ID=93935530

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2024/017531 Ceased WO2024262182A1 (ja) 2023-06-21 2024-05-10 被覆活物質、正極材料、および電池

Country Status (5)

Country Link
US (1) US20260106215A1 (https=)
EP (1) EP4734171A1 (https=)
JP (1) JPWO2024262182A1 (https=)
CN (1) CN121195356A (https=)
WO (1) WO2024262182A1 (https=)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013152911A (ja) * 2012-01-26 2013-08-08 Jx Nippon Mining & Metals Corp リチウムイオン電池用正極活物質、リチウムイオン電池用正極、及び、リチウムイオン電池
JP2020053156A (ja) * 2018-09-25 2020-04-02 トヨタ自動車株式会社 複合活物質粒子の製造方法
WO2021187391A1 (ja) 2020-03-18 2021-09-23 パナソニックＩｐマネジメント株式会社 正極材料、および、電池
WO2021241416A1 (ja) * 2020-05-27 2021-12-02 パナソニックＩｐマネジメント株式会社 正極活物質、正極材料、電池、および正極活物質の製造方法
WO2021241417A1 (ja) * 2020-05-27 2021-12-02 パナソニックＩｐマネジメント株式会社 正極活物質、正極材料、電池、および正極活物質の製造方法
WO2023037775A1 (ja) * 2021-09-13 2023-03-16 パナソニックＩｐマネジメント株式会社 被覆活物質、被覆活物質の製造方法、正極材料、および電池

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013152911A (ja) * 2012-01-26 2013-08-08 Jx Nippon Mining & Metals Corp リチウムイオン電池用正極活物質、リチウムイオン電池用正極、及び、リチウムイオン電池
JP2020053156A (ja) * 2018-09-25 2020-04-02 トヨタ自動車株式会社 複合活物質粒子の製造方法
WO2021187391A1 (ja) 2020-03-18 2021-09-23 パナソニックＩｐマネジメント株式会社 正極材料、および、電池
WO2021241416A1 (ja) * 2020-05-27 2021-12-02 パナソニックＩｐマネジメント株式会社 正極活物質、正極材料、電池、および正極活物質の製造方法
WO2021241417A1 (ja) * 2020-05-27 2021-12-02 パナソニックＩｐマネジメント株式会社 正極活物質、正極材料、電池、および正極活物質の製造方法
WO2023037775A1 (ja) * 2021-09-13 2023-03-16 パナソニックＩｐマネジメント株式会社 被覆活物質、被覆活物質の製造方法、正極材料、および電池

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, vol. 164, no. 14, 2017, pages A3727 - A3741

Also Published As

Publication number Publication date
JPWO2024262182A1 (https=) 2024-12-26
CN121195356A (zh) 2025-12-23
US20260106215A1 (en) 2026-04-16
EP4734171A1 (en) 2026-04-29

Similar Documents

Publication Publication Date Title
US20240313201A1 (en) Coated active material, method for producing coated active material, positive electrode material and battery
EP4404290A1 (en) Positive electrode material, positive electrode and battery
JP7796340B2 (ja) 被覆活物質、正極材料、正極および電池
WO2023037769A1 (ja) 正極材料、正極および電池
WO2022255027A1 (ja) 被覆活物質、正極材料、正極および電池
WO2022255026A1 (ja) 被覆活物質、正極材料、正極および電池
JP7796351B2 (ja) 被覆活物質、電極材料および電池
JP7788681B2 (ja) 被覆活物質、電極材料および電池
JP7759624B2 (ja) 固体電池
WO2023037816A1 (ja) 被覆活物質、電極材料および電池
WO2023037815A1 (ja) 被覆活物質、電極材料および電池
WO2024262182A1 (ja) 被覆活物質、正極材料、および電池
WO2024262183A1 (ja) 被覆活物質、正極材料、および電池
JP7825185B2 (ja) 正極材料、正極および電池
WO2024262185A1 (ja) 被覆活物質、正極材料、正極、および電池
WO2024185316A1 (ja) 正極材料、正極および電池
US20260088344A1 (en) Cathode material, cathode, and battery
WO2025253965A1 (ja) 電極材料、および電池
US20260088345A1 (en) Cathode material, cathode, and battery
WO2024262184A1 (ja) 電極材料、および、電池
WO2025253964A1 (ja) 被覆活物質、電極材料、および電池
WO2025249300A1 (ja) 被覆活物質、電極材料および電池
EP4734183A1 (en) Coated active material, positive electrode material, positive electrode, and battery

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24825591

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2025527557

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2025527557

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 2024825591

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2024825591

Country of ref document: EP

Effective date: 20260121

ENP Entry into the national phase

Ref document number: 2024825591

Country of ref document: EP

Effective date: 20260121

ENP Entry into the national phase

Ref document number: 2024825591

Country of ref document: EP

Effective date: 20260121