WO2022254984A1 - 正極材料、正極および電池 - Google Patents

正極材料、正極および電池 Download PDF

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Publication number
WO2022254984A1
WO2022254984A1 PCT/JP2022/018139 JP2022018139W WO2022254984A1 WO 2022254984 A1 WO2022254984 A1 WO 2022254984A1 JP 2022018139 W JP2022018139 W JP 2022018139W WO 2022254984 A1 WO2022254984 A1 WO 2022254984A1
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WO
WIPO (PCT)
Prior art keywords
solid electrolyte
positive electrode
coating layer
active material
electrode active
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/JP2022/018139
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English (en)
French (fr)
Japanese (ja)
Inventor
裕太 杉本
和弥 橋本
晃暢 宮崎
賢治 長尾
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.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
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 Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to JP2023525653A priority Critical patent/JP7825185B2/ja
Priority to CN202280036605.9A priority patent/CN117355958A/zh
Priority to EP22815740.0A priority patent/EP4350799A4/en
Publication of WO2022254984A1 publication Critical patent/WO2022254984A1/ja
Priority to US18/513,658 priority patent/US20240088435A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01M10/056—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
    • 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
    • H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • 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
    • H01M4/364—Composites as mixtures
    • 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
    • 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
    • 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
    • H01M2300/0088—Composites
    • H01M2300/0094—Composites in the form of layered products, e.g. coatings
    • 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
    • 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 safety of batteries can be improved.
  • FIG. 1 is a cross-sectional view showing a schematic configuration of a positive electrode material according to Embodiment 1.
  • FIG. FIG. 2 is a cross-sectional view showing a schematic configuration of a positive electrode material according to a modification.
  • FIG. 3 is a cross-sectional view showing a schematic configuration of a battery according to Embodiment 2.
  • Batteries with solid electrolytes are recognized as safe, but this is not always the case.
  • oxygen may be generated from the positive electrode active material.
  • the generated oxygen oxidizes the solid electrolyte and raises the temperature of the battery.
  • the container of the battery is deteriorated and damaged, or that the battery malfunctions. Therefore, it is expected that the safety of batteries using solid electrolytes will be further improved.
  • the safety of the battery can be improved.
  • a positive electrode according to an eighth aspect of the present disclosure includes a positive electrode material according to any one of the first to seventh aspects. With such a configuration, the safety of the battery can be improved.
  • FIG. 1 is a cross-sectional view showing a schematic configuration of a positive electrode material according to Embodiment 1.
  • the positive electrode material 10 has a positive electrode active material 101 , a coating layer 102 containing a first solid electrolyte, and a second solid electrolyte 105 .
  • the coating layer 102 covers at least part of the surface of the positive electrode active material 101 .
  • the coating layer 102 may cover only part of the surface of the positive electrode active material 101 , or may cover the surface of the positive electrode active material 101 uniformly.
  • the positive electrode active material 101 and the coating layer 102 constitute the coated active material 100 .
  • the second solid electrolyte 105 is in contact with the positive electrode active material 101 via the coating layer 102 .
  • the positive electrode active material 101 may be insufficiently covered with the first solid electrolyte, and the above effect may not be obtained sufficiently. If the ratio V1/Vt is too high, there is concern that the positive electrode material 10 may have insufficient electronic conductivity or insufficient ionic conductivity.
  • the ratio V1/Vt may desirably be 40% or less.
  • the positive electrode active material 101 includes a material that has the property of intercalating and deintercalating metal ions (for example, lithium ions).
  • metal ions for example, lithium ions.
  • As the positive electrode active material 101 lithium-containing transition metal oxides, transition metal fluorides, polyanion materials, fluorinated polyanion materials, transition metal sulfides, transition metal oxysulfides, transition metal oxynitrides, and the like can be used.
  • a lithium-containing transition metal oxide when a lithium-containing transition metal oxide is used as the positive electrode active material 101, the manufacturing cost of the battery can be reduced and the average discharge voltage can be increased.
  • Lithium-containing transition metal oxides include Li(NiCoAl)O 2 , Li(NiCoMn)O 2 and LiCoO 2 .
  • the thickness of the coating layer 102 is, for example, 1 nm or more and 500 nm or less. If the thickness of coating layer 102 is appropriately adjusted, contact between positive electrode active material 101 and second solid electrolyte 105 can be sufficiently suppressed.
  • the thickness of the coating layer 102 can be specified by thinning the coated active material 100 by a method such as ion milling and observing the cross section of the coated active material 100 with a transmission electron microscope. An average value of thicknesses measured at a plurality of arbitrary positions (for example, 5 points) can be regarded as the thickness of the coating layer 102 .
  • the shape of the halide solid electrolyte is not particularly limited, and may be acicular, spherical, ellipsoidal, or the like, for example.
  • the shape of the halide solid electrolyte may be particulate.
  • a halide solid electrolyte can be produced by the following method.
  • a method for producing the halide solid electrolyte represented by the compositional formula (1) will be exemplified.
  • Examples of sulfide solid electrolytes include Li 2 SP 2 S 5 , Li 2 S—SiS 2 , Li 2 S—B 2 S 3 , Li 2 S—GeS 2 , Li 3.25 Ge 0.25 P 0.75 S 4 , Li 10 GeP 2 S 12 and the like can be used.
  • LiX, Li2O , MOq , LipMOq , etc. may be added to these.
  • X in “LiX” is at least one selected from the group consisting of F, Cl, Br and I.
  • the element M in “MO q " and “Li p MO q " is at least one selected from the group consisting of P, Si, Ge, B, Al, Ga, In, Fe, and Zn.
  • p and q in "MO q " and "L p MO q " are independent natural numbers.
  • the binder may be an elastomer because it has excellent binding properties. Elastomers are polymers that have rubber elasticity.
  • the elastomer used as the binder may be a thermoplastic elastomer or a thermosetting elastomer.
  • the binder may contain a thermoplastic elastomer.
  • Mechanisms is a particle compounding device that uses dry mechanical compounding technology by applying strong mechanical energy to multiple different raw material powders.
  • mechanofusion mechanical energies of compression, shear, and friction are imparted to raw material powder placed between a rotating container and a press head. This causes particle compositing.
  • the underlying material may be a material containing Nb.
  • the underlying material typically includes lithium niobate (LiNbO 3 ). According to such a configuration, it is possible to improve the charging and discharging efficiency of the battery. It is also possible to use the materials described above as the oxide solid electrolyte, which is the underlying material.
  • the method of forming the second coating layer 103 is not limited to the above.
  • the second coating layer 103 may be formed by various methods such as a spray method, a spray dry coating method, an electrodeposition method, an immersion method, and a mechanical mixing method using a disperser.
  • FIG. 3 is a cross-sectional view showing a schematic configuration of a battery according to Embodiment 2.
  • Battery 200 includes positive electrode 201 , separator layer 202 and negative electrode 203 .
  • a separator layer 202 is arranged between the positive electrode 201 and the negative electrode 203 .
  • Positive electrode 201 includes at least one of positive electrode material 10 and positive electrode material 20 described in the first embodiment. With such a configuration, the safety of battery 200 can be improved.
  • Metal materials, carbon materials, oxides, nitrides, tin compounds, silicon compounds, etc. can be used as negative electrode active materials.
  • the metal material may be a single metal.
  • the metallic material may be an alloy.
  • metal materials include lithium metal and lithium alloys.
  • Examples of carbon materials include natural graphite, coke, ungraphitized carbon, carbon fiber, spherical carbon, artificial graphite, and amorphous carbon. From the viewpoint of capacity density, silicon (Si), tin (Sn), silicon compounds, tin compounds, etc. can be preferably used.
  • the negative electrode 203 may contain other materials such as a solid electrolyte.
  • a solid electrolyte the material described in Embodiment 1 can be used.
  • a differential scanning calorimeter (TA Instruments Q1000) was used for thermal analysis. The temperature was raised from 0°C to 400°C at 10°C/min. In the thermal analysis curve, the temperature at which the peak rises was regarded as the exothermic start temperature. Table 1 shows the results.

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  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)
PCT/JP2022/018139 2021-05-31 2022-04-19 正極材料、正極および電池 Ceased WO2022254984A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2023525653A JP7825185B2 (ja) 2021-05-31 2022-04-19 正極材料、正極および電池
CN202280036605.9A CN117355958A (zh) 2021-05-31 2022-04-19 正极材料、正极和电池
EP22815740.0A EP4350799A4 (en) 2021-05-31 2022-04-19 POSITIVE ELECTRODE MATERIAL, POSITIVE ELECTRODE AND BATTERY
US18/513,658 US20240088435A1 (en) 2021-05-31 2023-11-20 Positive electrode material, positive electrode, and battery

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021091712 2021-05-31
JP2021-091712 2021-05-31

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US18/513,658 Continuation US20240088435A1 (en) 2021-05-31 2023-11-20 Positive electrode material, positive electrode, and battery

Publications (1)

Publication Number Publication Date
WO2022254984A1 true WO2022254984A1 (ja) 2022-12-08

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PCT/JP2022/018139 Ceased WO2022254984A1 (ja) 2021-05-31 2022-04-19 正極材料、正極および電池

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US (1) US20240088435A1 (https=)
EP (1) EP4350799A4 (https=)
JP (1) JP7825185B2 (https=)
CN (1) CN117355958A (https=)
WO (1) WO2022254984A1 (https=)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009193940A (ja) * 2008-02-18 2009-08-27 Toyota Motor Corp 電極体及びその製造方法、並びに、リチウムイオン二次電池
JP2016018735A (ja) 2014-07-10 2016-02-01 トヨタ自動車株式会社 複合活物質及びその製造方法
WO2019146216A1 (ja) * 2018-01-26 2019-08-01 パナソニックＩｐマネジメント株式会社 電池
WO2019146308A1 (ja) * 2018-01-26 2019-08-01 パナソニックＩｐマネジメント株式会社 電極材料、および、電池
WO2019146236A1 (ja) * 2018-01-26 2019-08-01 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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022209686A1 (ja) * 2021-03-30 2022-10-06 パナソニックＩｐマネジメント株式会社 被覆正極活物質、正極材料、電池、および被覆正極活物質の製造方法
EP4404290A4 (en) * 2021-09-13 2025-04-16 Panasonic Intellectual Property Management Co., Ltd. Positive electrode material, positive electrode and battery

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009193940A (ja) * 2008-02-18 2009-08-27 Toyota Motor Corp 電極体及びその製造方法、並びに、リチウムイオン二次電池
JP2016018735A (ja) 2014-07-10 2016-02-01 トヨタ自動車株式会社 複合活物質及びその製造方法
WO2019146216A1 (ja) * 2018-01-26 2019-08-01 パナソニックＩｐマネジメント株式会社 電池
WO2019146308A1 (ja) * 2018-01-26 2019-08-01 パナソニックＩｐマネジメント株式会社 電極材料、および、電池
WO2019146236A1 (ja) * 2018-01-26 2019-08-01 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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4350799A4

Also Published As

Publication number Publication date
JP7825185B2 (ja) 2026-03-06
EP4350799A4 (en) 2025-07-23
EP4350799A1 (en) 2024-04-10
CN117355958A (zh) 2024-01-05
US20240088435A1 (en) 2024-03-14
JPWO2022254984A1 (https=) 2022-12-08

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