WO2025032966A1 - 電池 - Google Patents

電池 Download PDF

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Publication number
WO2025032966A1
WO2025032966A1 PCT/JP2024/021734 JP2024021734W WO2025032966A1 WO 2025032966 A1 WO2025032966 A1 WO 2025032966A1 JP 2024021734 W JP2024021734 W JP 2024021734W WO 2025032966 A1 WO2025032966 A1 WO 2025032966A1
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WIPO (PCT)
Prior art keywords
negative electrode
active material
electrode active
layer
particles
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PCT/JP2024/021734
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English (en)
French (fr)
Japanese (ja)
Inventor
裕介 森野
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Murata Manufacturing Co Ltd
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Murata Manufacturing Co Ltd
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Priority to JP2025539161A priority Critical patent/JPWO2025032966A1/ja
Priority to CN202480051329.2A priority patent/CN121646827A/zh
Publication of WO2025032966A1 publication Critical patent/WO2025032966A1/ja
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • 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
    • 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
    • H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a battery.
  • Patent Document 1 describes an all-solid-state battery that contains fine particles containing a sulfide-based solid electrolyte at the boundary between the solid electrolyte layer and the negative electrode layer.
  • This disclosure has been made in light of the above, and aims to improve discharge capacity.
  • the battery according to one embodiment includes a positive electrode, a negative electrode having a negative electrode active material layer containing a negative electrode active material and insulating particles, and an electrolyte layer containing a solid electrolyte, the negative electrode active material layer having a first main surface on the electrolyte layer side and a second main surface opposite the first main surface, the negative electrode active material layer has a continuous negative electrode active material extending from the first main surface to the second main surface, and the particles are on the first main surface of the negative electrode active material layer.
  • the present invention can improve discharge capacity.
  • FIG. 1 is a schematic cross-sectional view showing an example of a battery according to a first embodiment.
  • FIG. 1 is a schematic cross-sectional view showing an example of a battery according to the first embodiment.
  • the battery 1 in the first embodiment is an all-solid-state battery in which the electrolyte is solid, and is a lithium-ion secondary battery.
  • the battery 1 includes a protective layer 10, a positive electrode 20, a negative electrode 30, and an electrolyte layer 40.
  • the battery 1 has a structure in which the sheet-shaped positive electrode 20, the negative electrode 30, and the electrolyte layer 40 are laminated.
  • the Z direction refers to the stacking direction of the positive electrode 20, the negative electrode 30, and the electrolyte layer 40
  • the X direction refers to a direction perpendicular to the Z direction and parallel to the cross section of FIG. 1
  • the Y direction refers to a direction perpendicular to the X and Z directions.
  • one of the X directions may be described as the +X direction and the other as the -X direction.
  • one of the Z directions may be described as the +Z direction and the other as the -Z direction.
  • the protective layer 10 is a layer provided to physically and chemically protect the battery 1. When viewed in a plan view in the Z direction, the protective layer 10 is provided so as to overlap the laminate of the positive electrode 20, the negative electrode 30, and the electrolyte layer 40. In the example of FIG. 1, the protective layer 10 is provided on both sides in the Z direction of the laminate of the positive electrode 20, the negative electrode 30, and the electrolyte layer 40.
  • the material of the protective layer 10 is not particularly limited as long as it is an insulator, and may be, for example, a resin, glass, ceramics, etc.
  • the positive electrode 20 includes a positive electrode collector layer 21 and a positive electrode active material layer 22.
  • the positive electrode 20 has a structure in which the positive electrode active material layer 22 is laminated in the ⁇ Z direction of the positive electrode collector layer 21, but this is merely an example, and the positive electrode 20 may be laminated in the +Z direction of the positive electrode collector layer 21.
  • the positive electrode collector layer 21 is a layer having electrical conductivity.
  • the end face of the positive electrode collector layer 21 in the +X direction is exposed and can be connected to the outside.
  • the end face of the positive electrode collector layer 21 in the +X direction is the positive electrode of the battery 1.
  • the material of the positive electrode collector layer 21 is not particularly limited as long as it has electrical conductivity, and examples of the material include metal materials such as silver, palladium, gold, platinum, aluminum, copper, and nickel, and carbon materials.
  • the positive electrode active material layer 22 is a layer containing a positive electrode active material.
  • the positive electrode active material layer 22 is laminated on the positive electrode current collector layer 21.
  • the positive electrode active material is not particularly limited, and may be at least one selected from the group consisting of a lithium-containing phosphate compound having a Nasicon structure, a lithium-containing phosphate compound having an olivine structure, a lithium-containing layered oxide, and a lithium-containing oxide having a spinel structure.
  • An example of a lithium-containing phosphate compound having a Nasicon structure is Li 3 V 2 (PO 4 ) 3.
  • An example of a lithium-containing phosphate compound having an olivine structure is Li 3 Fe 2 (PO 4 ) 3 , LiMnPO 4 , etc.
  • lithium-containing layered oxide is LiCoO 2 , LiCo 1/3 Ni 1/3 Mn 1/3 O 2 , etc.
  • lithium-containing oxides having a spinel structure include LiMn 2 O 4 and LiNi 0.5 Mn 1.5 O 4 .
  • the material contained in the positive electrode active material layer 22 is not limited to the positive electrode active material, and may contain a solid electrolyte or a sintering aid, which will be described later.
  • the sintering aid is not particularly limited, and examples thereof include lithium oxide, sodium oxide, potassium oxide, boron oxide, silicon oxide, bismuth oxide, and phosphorus oxide.
  • the negative electrode 30 has a negative electrode current collector layer 31, a negative electrode active material layer 32, and particles 33.
  • the negative electrode collector layer 31 is a layer having electrical conductivity.
  • the end face of the negative electrode collector layer 31 in the -X direction is exposed and can be connected to the outside.
  • the end face of the negative electrode collector layer 31 in the -X direction is the negative electrode of the battery 1.
  • the material of the negative electrode collector layer 31 is a metal having electrical conductivity, and contains at least one of copper, nickel, and iron.
  • the material of the negative electrode collector layer 31 is not limited to this, and may further contain, for example, a metal material such as palladium, gold, platinum, aluminum, etc.
  • the negative electrode collector layer 31 is not limited to being made of one layer, and may have multiple layers, such as stainless steel coated with nickel on the negative electrode active material layer 32 side.
  • the negative electrode active material layer 32 is a layer containing a negative electrode active material.
  • the negative electrode active material layer 32 is provided in the +Z direction of the negative electrode current collector layer 31.
  • the negative electrode active material layer 32 has a first main surface 32a and a second main surface 32b.
  • the first main surface 32a is the main surface of the negative electrode active material layer 32 on the electrolyte layer 40 side.
  • the second main surface 32b is the main surface of the negative electrode active material layer 32 on the side opposite the electrolyte layer 40. In the example of FIG. 1, the second main surface 32b is in contact with the negative electrode current collector layer 31.
  • the thickness of the negative electrode active material layer 32 is 10 ⁇ m or more.
  • the thickness of the negative electrode active material layer 32 refers to the average distance between the first principal surface 32a and the second principal surface 32b in the direction in which the negative electrode collector layer 31 and the electrolyte layer 40 face each other (Z direction). This can improve the energy density of the battery 1.
  • the negative electrode active material layer 32 contains at least one of tin (Sn) and silicon (Si) as a negative electrode active material.
  • the crystallinity of the silicon is not particularly limited, and may be amorphous, for example. This improves the energy density of the battery 1.
  • the negative electrode active material layer 32 is made of a negative electrode active material, but may further contain a conductive additive and a binder.
  • the negative electrode active material layer 32 has a continuous negative electrode active material from the first main surface 32a to the second main surface 32b.
  • the inside of the negative electrode active material layer 32 does not substantially contain the components of the electrolyte layer 40 (e.g., solid electrolyte).
  • the negative electrode active material layer 32 has a path that passes only through the negative electrode active material from the main surface on the negative electrode collector layer 31 side to the main surface on the electrolyte layer 40 side.
  • Examples of the continuum include metal foils and wafers, but it may also have a coating formed by plating, sputtering, vapor deposition, etc. This can improve the energy density of the battery 1.
  • the particles 33 made of an insulator penetrate between the particles of the negative electrode active material, thereby preventing the electron conduction path from the negative electrode collector layer 31 to the electrolyte layer 40 from being blocked.
  • the negative electrode active material layer 32 is made of a plurality of negative electrode active material particles
  • the particles are in direct contact with each other so that ions or electrons are conducted mechanically through the negative electrode active material particles, and the first main surface 32a side and the second main surface 32b side are electrically connected by this contact.
  • the plurality of negative electrode active material particles are formed continuously from the first main surface 32a to the second main surface 32b.
  • continuous means that when a straight line is drawn along the Z direction connecting the first main surface 32a and the second main surface 32b, there are no components (including voids) other than the active material on the straight line. More specifically, if the area of the region on which the straight line can be drawn is 50% or more of the total area of the cross section of the negative electrode active material layer 32 in at least one field of view obtained by observing the cross section of the negative electrode active material layer 32 with an electron microscope such as SEM, then it can be said that the negative electrode active material of the negative electrode active material layer 32 is continuous from the first main surface 32a to the second main surface 32b.
  • the particles 33 are dispersed in the first main surface 32a of the negative electrode active material layer 32.
  • the particles 33 are in contact with the negative electrode active material layer 32 and the electrolyte layer 40.
  • “dispersed” means that the particles 33 are scattered on the first main surface 32a and arranged in a part of the first main surface 32a.
  • the first main surface 32a has a region in contact with the electrolyte layer 40 via the particles 33 and a region in direct contact with the electrolyte layer 40.
  • the primary particle diameter of the particles 33 is preferably 100 nm or less.
  • the primary particle diameter refers to the median diameter (D 50 particle diameter) of the particles.
  • the primary particle diameter of the particles 33 can be measured from a scanning electron microscope (SEM) observation image or an energy dispersive X-ray spectroscopy (EDX) mapping image.
  • the particles 33 are insulating.
  • insulating means that the ionic conductivity is 10 -7 S/cm or less and the electronic conductivity is 10 -7 S/cm or less at room temperature, i.e., at 5°C or more and 35°C or less. This reduces the contact area between the negative electrode active material layer 32 and the electrolyte layer 40, thereby suppressing the reductive decomposition of the solid electrolyte in a side reaction of the charge/discharge reaction, and improving the discharge capacity.
  • the dielectric effect can improve the electronic conduction from the negative electrode collector layer 31 to the electrolyte layer 40, so that the resistance at the interface between the negative electrode collector layer 31 and the electrolyte layer 40 can be reduced and the Coulombic efficiency can be improved.
  • the particles 33 are made of an insulator, and preferably made of a charged insulator.
  • a charged insulator refers to a material that insulates ions and electrons.
  • the particles 33 are an inorganic compound having an element M and oxygen (O).
  • the element M is at least one of calcium (Ca), barium (Ba), titanium (Ti), zirconium (Zr), vanadium (V), niobium (Nb), molybdenum (Mo), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), aluminum (Al), indium (In), silicon (Si), tin (Sn), antimony (Sb), and phosphorus (P). This improves the dielectric effect, thereby further reducing the resistance at the interface between the negative electrode collector layer 31 and the electrolyte layer 40.
  • the electrolyte layer 40 is a layer provided between the positive electrode 20 and the negative electrode 30.
  • the electrolyte layer 40 is a sintered body containing a solid electrolyte.
  • the solid electrolyte is not particularly limited as long as it is a material that allows ions to move between the positive electrode 20 and the negative electrode 30.
  • the solid electrolyte is, for example, a sulfide, and Li 6 PS 5 Cl, Li 3 PS 4 , Li 4 SnS 4, etc. are used.
  • a sulfide solid electrolyte By using a sulfide solid electrolyte, the thermoformability of the electrolyte layer 40 can be improved, and a good bonding interface with the positive electrode active material layer 22 can be formed.
  • the side reinforcement portion 60 is provided to prevent a short circuit of the battery 1.
  • the side reinforcement portion 60 is provided on the X-direction and Y-direction end faces of the positive electrode 20, the negative electrode 30, and the electrolyte layer 40.
  • the material of the side reinforcement portion 60 is not particularly limited as long as it is an insulator, and may be, for example, resin, glass, ceramics, etc.
  • the negative electrode and battery according to the first embodiment are not limited to those described above.
  • the negative electrode active material layer is a metal foil
  • the negative electrode does not need to have a negative electrode current collector layer.
  • the negative electrode active material layer can be connected to the outside as the negative electrode of the battery.
  • the battery according to the first embodiment may also be a battery having an exterior body (case). That is, the battery according to the first embodiment may be a battery in which a laminate including the positive electrode 20, the negative electrode 30, and the electrolyte layer 40 is housed in an exterior body made of metal, ceramics, or the like.
  • the battery 1 includes a positive electrode 20, a negative electrode 30 having a negative electrode active material layer 32 containing a negative electrode active material and insulating particles 33, and an electrolyte layer 40 containing a solid electrolyte.
  • the negative electrode active material layer 32 has a first main surface 32a on the electrolyte layer 40 side and a second main surface 32b on the opposite side to the first main surface.
  • the negative electrode active material is continuous from the first main surface 32a to the second main surface 32b.
  • the particles 33 are on the first main surface 32a of the negative electrode active material layer 32.
  • the dielectric effect improves the electron conduction from the negative electrode collector layer 31 to the electrolyte layer 40, reducing the resistance at the interface between the negative electrode collector layer 31 and the electrolyte layer 40, improving the Coulomb efficiency.
  • the thickness of the negative electrode active material layer 32 is 10 ⁇ m or more. This improves the energy density of the battery 1.
  • the negative electrode active material contains at least one of Sn and Si. This can improve the energy density of the battery 1.
  • the particles 33 contain oxygen. This improves the dielectric effect, which further reduces the resistance at the interface between the negative electrode collector layer 31 and the electrolyte layer 40, thereby further improving the Coulomb efficiency.
  • the particles 33 also contain at least one of Ca, Ba, Ti, Zr, V, Nb, Mo, Mn, Fe, Co, Ni, Cu, Zn, Al, In, Si, Sn, and Sb. Even in this case, the discharge capacity can be improved.
  • the particles 33 also contain at least one of titanium oxide, zirconium oxide, aluminum oxide, zinc oxide, indium oxide, barium titanate, and phosphorus oxide. Even in this case, the discharge capacity can be improved.
  • the solid electrolyte contains sulfur. This improves the thermoformability of the electrolyte layer 40 and allows a good bonding interface to be formed with the positive electrode active material layer 22.
  • the method for synthesizing the negative electrode according to the first embodiment includes a negative electrode active material layer forming process and a particle dispersion process.
  • the negative electrode active material layer forming process is a process for forming the negative electrode active material layer 32.
  • the negative electrode active material layer 32 is formed, for example, by rolling a metal foil to a thickness of 10 ⁇ m or more.
  • the particle dispersion process is a process in which the particles 33 are dispersed on one main surface of the negative electrode active material layer 32. Specifically, the solvent in which the particles 33 are dispersed is dropped onto one main surface of the negative electrode active material layer 32 and dried, so that the particles 33 are dispersed on one main surface of the negative electrode active material layer 32.
  • the negative electrode active material layer 32 has already been provided on the negative electrode current collector layer 31, the particles 33 are dispersed on the main surface of the negative electrode active material layer 32 opposite the negative electrode current collector layer 31 side.
  • the negative electrode active material layer 32 may be formed by sputtering the negative electrode current collector layer 31 using the negative electrode active material as a deposition source.
  • the particles 33 are dispersed on the main surface of the negative electrode active material layer 32 opposite the negative electrode current collector layer 31 side.
  • Example 1 The battery according to Example 1 was produced by the following method.
  • the negative electrode active material forming step tin foil was rolled to a thickness of 10 ⁇ m to produce a negative electrode active material layer.
  • the particle dispersion step a solution in which zirconium oxide (ZrO 2 ) particles having a primary particle size of 10 nm were dispersed in isopropyl alcohol at 0.1 mass % was dropped onto the produced negative electrode active material layer in an amount of 50 ⁇ L/cm 2 , air-dried, and then completely dried at 100° C. Then, 150 mg of Li 6 PS 5 C powder was pressed into a pellet shape as a solid electrolyte to produce an electrolyte layer.
  • ZrO 2 zirconium oxide
  • the produced electrolyte layer was attached to the particle-attached negative electrode active material layer produced above on the side with the particles.
  • a counter electrode made of an In-Li alloy was attached to the main surface of the produced electrolyte layer opposite to the negative electrode active material layer.
  • stainless steel foil was attached to both sides as a negative electrode current collector and a counter electrode current collector, and pressed in the lamination direction at a pressure of 1 tf/(cm 2 ⁇ min) to prepare a battery according to Example 1.
  • charging refers to inserting lithium ions into the negative electrode and storing energy
  • discharging refers to desorbing lithium ions from the negative electrode and releasing energy.
  • Charge rate 0.05C Charging method: CCCV, 0.01C current cut Charging control voltage: 5mV
  • Discharge rate 0.05C Discharge method: CC Discharge end voltage: 1.5V
  • Example 2 In Example 2, a battery was fabricated and its charge/discharge characteristics were measured in the same manner as in Example 1, except that aluminum oxide (Al 2 O 3 ) particles having a primary particle size of 20 nm were used instead of zirconium oxide (ZrO 2 ) particles in the particle dispersion process.
  • Al 2 O 3 aluminum oxide
  • ZrO 2 zirconium oxide
  • Example 3 In Example 3, a battery was fabricated and its charge/discharge characteristics were measured in the same manner as in Example 1, except that indium oxide (In 2 O 3 ) particles having a primary particle size of 50 nm were used instead of zirconium oxide (ZrO 2 ) particles in the particle dispersion process.
  • indium oxide (In 2 O 3 ) particles having a primary particle size of 50 nm were used instead of zirconium oxide (ZrO 2 ) particles in the particle dispersion process.
  • Example 4 In Example 4, a battery was fabricated and its charge/discharge characteristics were measured in the same manner as in Example 1, except that in the particle dispersion process, barium titanate particles (BaTiO 3 ) having a primary particle size of 80 nm were used instead of zirconium oxide (ZrO 2 ) particles.
  • barium titanate particles BaTiO 3
  • ZrO 2 zirconium oxide
  • Example 5 In Example 5, a battery was produced and its charge/discharge characteristics were measured in the same manner as in Example 1, except that Li 3 PS 4 was used as the solid electrolyte.
  • Comparative Example 1 In Comparative Example 1, a battery was fabricated and its charge/discharge characteristics were measured in the same manner as in Example 1, except that in the particle dispersion process, a solution in which Li6PS5Cl particles having a primary particle size of 100 nm were dispersed in hexane at 1 mass % was used instead of the solution in which zirconium oxide (ZrO2) particles were dispersed in isopropyl alcohol at 0.1 mass %.
  • ZrO2 zirconium oxide
  • Comparative Example 2 In Comparative Example 2, a battery was fabricated and its charge/discharge characteristics were measured in the same manner as in Example 1 , except that in the particle dispersion process, a solution in which Li3PS4 particles having a primary particle size of 100 nm were dispersed in hexane at 1 mass % was used instead of the solution in which zirconium oxide (ZrO2) particles were dispersed in isopropyl alcohol at 0.1 mass %.
  • ZrO2 zirconium oxide
  • Table 1 shows the measurement results of the charge/discharge characteristics for Examples 1 to 5 and Comparative Examples 1 and 2.
  • Example 6 In Example 6, a battery was produced and its charge/discharge characteristics were measured in the same manner as in Example 1, except that in the negative electrode active material formation step, the tin foil was rolled to a thickness of 20 ⁇ m.
  • Comparative Example 3 In Comparative Example 3, a battery was produced and its charge/discharge characteristics were measured in the same manner as in Comparative Example 1, except that in the negative electrode active material formation step, the tin foil was rolled to a thickness of 20 ⁇ m.
  • Table 2 shows the measurement results of the charge/discharge characteristics for Example 6 and Comparative Example 3.
  • Example 6 used insulating particles, and therefore the discharge capacity and coulombic efficiency were improved compared to Comparative Example 3, which used ion-conductive particles.
  • Example 7 As the negative electrode active material layer forming step, sputtering was performed on a copper foil having a thickness of 20 ⁇ m using Si as a deposition source to form a Si film having a thickness of 12 ⁇ m, thereby preparing a negative electrode active material layer. Sputtering was performed in an argon atmosphere of 0.7 Pa using Si as a deposition source by magnetron sputtering.
  • the particle dispersion step a solution in which zirconium oxide (ZrO 2 ) particles having a primary particle size of 10 nm were dispersed in isopropyl alcohol at 0.1 mass % was dropped on the Si film side of the copper foil in an amount of 50 ⁇ L/cm 2 , air-dried, and then completely dried at 100° C.
  • the subsequent steps were all performed in the same manner as in Example 1 to prepare a battery, and charge/discharge measurements were performed under the same conditions as in Example 1.
  • Example 8 In Example 8, a battery was fabricated and its charge/discharge characteristics were measured in the same manner as in Example 7, except that indium oxide particles having a primary particle size of 50 nm were used instead of zirconium oxide (ZrO 2 ) particles in the particle dispersion process.
  • indium oxide particles having a primary particle size of 50 nm were used instead of zirconium oxide (ZrO 2 ) particles in the particle dispersion process.
  • Comparative Example 4 a battery was fabricated and its charge/discharge characteristics were measured in the same manner as in Example 7 , except that in the particle dispersion process, a solution in which Li6PS5Cl particles having a primary particle size of 100 nm were dispersed in hexane at 1 mass % was used instead of the solution in which zirconium oxide (ZrO2) particles were dispersed in isopropyl alcohol at 0.1 mass %.
  • ZrO2 zirconium oxide
  • Table 3 shows the measurement results of the charge/discharge characteristics for Examples 7 and 8 and Comparative Example 4.
  • the present invention may also take the following forms.
  • a positive electrode and a negative electrode having a negative electrode active material layer containing a negative electrode active material and insulating particles; an electrolyte layer including a solid electrolyte; Equipped with the negative electrode active material layer has a first main surface on the electrolyte layer side and a second main surface opposite to the first main surface, the negative electrode active material layer has the negative electrode active material continuous from the first principal surface to the second principal surface, the particles are on the first major surface of the negative electrode active material layer.
  • the solid electrolyte contains sulfur.

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PCT/JP2024/021734 2023-08-08 2024-06-14 電池 Pending WO2025032966A1 (ja)

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JP2018160445A (ja) * 2017-03-22 2018-10-11 株式会社東芝 複合電解質、二次電池、電池パック及び車両
JP2019169300A (ja) * 2018-03-22 2019-10-03 株式会社東芝 電極複合体、電極群、二次電池、電池パック及び車両
JP2021097034A (ja) * 2019-12-18 2021-06-24 日本電気硝子株式会社 蓄電デバイス用部材、全固体電池及び蓄電デバイス用部材の製造方法
JP2022168968A (ja) * 2021-04-27 2022-11-09 トヨタ自動車株式会社 全固体電池

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016119212A (ja) * 2014-12-19 2016-06-30 ソニー株式会社 電池、電池パック、電子機器、電動車両、蓄電装置および電力システム
JP2018160445A (ja) * 2017-03-22 2018-10-11 株式会社東芝 複合電解質、二次電池、電池パック及び車両
JP2019169300A (ja) * 2018-03-22 2019-10-03 株式会社東芝 電極複合体、電極群、二次電池、電池パック及び車両
JP2021097034A (ja) * 2019-12-18 2021-06-24 日本電気硝子株式会社 蓄電デバイス用部材、全固体電池及び蓄電デバイス用部材の製造方法
JP2022168968A (ja) * 2021-04-27 2022-11-09 トヨタ自動車株式会社 全固体電池

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