CN114843620A - Solid-state battery and preparation method thereof - Google Patents

Solid-state battery and preparation method thereof Download PDF

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Publication number
CN114843620A
CN114843620A CN202210601289.7A CN202210601289A CN114843620A CN 114843620 A CN114843620 A CN 114843620A CN 202210601289 A CN202210601289 A CN 202210601289A CN 114843620 A CN114843620 A CN 114843620A
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Prior art keywords
solid
current collector
state battery
layer
state
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Inventor
姜涛
翟喜民
李子玉
孙焕丽
高天一
别晓非
胡景博
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FAW Group Corp
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FAW Group Corp
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Priority to CN202210601289.7A priority Critical patent/CN114843620A/en
Publication of CN114843620A publication Critical patent/CN114843620A/en
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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
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy 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
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
    • 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
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/665—Composites
    • H01M4/667—Composites in the form of layers, 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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Composite Materials (AREA)
  • Secondary Cells (AREA)
  • Cell Electrode Carriers And Collectors (AREA)

Abstract

The invention relates to a solid-state battery and a preparation method thereof, wherein the solid-state battery is composed of n solid-state laminated units, each solid-state laminated unit comprises a composite current collector, a positive electrode layer and a solid-state electrolyte layer, and the solid-state laminated units are mutually stacked to realize internal series connection; the composite current collector includes a first current collector layer and a second current collector layer. The preparation method comprises the steps of coating the positive electrode on the composite current collector to form a first pole piece; coating a solid electrolyte on the positive electrode to form a solid electrolyte unit, and forming a second pole piece together with the first pole piece; cutting the second pole piece into solid laminated units according to the design size; the design requires stacking n solid-state stacked units to form a solid-state battery. According to the invention, n solid-state laminated units are mutually connected in series to form a solid-state battery with the interior connected in series, so that the battery voltage is improved; in the charging and discharging process, the lithium removed from the positive electrode and the second current collector layer of the composite current collector form an alloy which is uniformly deposited on the surface of the current collector, so that the energy density of the solid-state battery is greatly improved; the preparation process is simple and has no short circuit risk.

Description

Solid-state battery and preparation method thereof
Technical Field
The invention belongs to the technical field of solid-state batteries, and particularly relates to a solid-state battery and a preparation method thereof.
Background
At present, commercial lithium ion batteries cannot meet the safety requirements of people on the batteries due to the adoption of flammable and explosive organic electrolyte, and the energy density reaches the limit. And the all-solid-state battery which replaces organic electrolyte by solid electrolyte is expected to become the safest substitute of the lithium ion battery on the market at present. The solid-state battery is hopeful to realize the series connection of the inside of the battery cell because no liquid flows inside the solid-state battery.
The prior art discloses a bipolar all-solid-state battery capable of preventing the current collector of a bipolar electrode from being damaged and well preventing short circuit from occurring, and a method for manufacturing the bipolar all-solid-state battery, the bipolar all-solid-state battery comprises a bipolar electrode and a solid electrolyte layer containing a solid electrolyte, wherein a plurality of the bipolar electrode layers are laminated via the solid electrolyte layer, the bipolar electrode comprises a collector and an electrode active material layer, wherein the electrode active material layer comprises a positive electrode active material layer formed on one surface of the collector and containing a positive electrode active material, and a negative electrode active material layer formed on the other surface of the collector and containing a negative electrode active material, the electrode active material layer is formed inside an end portion of the current collector, and a reinforcing layer formed on the surface of the current collector is disposed between the end portion of the electrode active material layer and the surface of the current collector. However, the current collector of the bipolar all-solid battery is compatible with a positive electrode material and a negative electrode material, a copper layer, an aluminum layer and an intermediate layer are hot-pressed together, a positive electrode copper foil is coated on the side of an aluminum foil during use, a negative electrode is coated on the side of the aluminum foil, and the structural arrangement of the positive electrode current collector and the negative electrode current collector is used for preventing the short circuit of the battery, so that the structure is complex.
In the inner-series battery, since the inner-series battery has a structure in which a plurality of bipolar electrodes are stacked, there are problems as follows: first, short circuits occur due to contact between collectors, contact between the electrode active material layer of the irregular portion of the bipolar electrode end portion and the collector, and the like; in addition, by adopting the scheme of the bipolar electrode with the positive electrode layer on one surface of the current collector and the negative electrode layer on the other surface of the current collector, when the manufacturing process is pressed, due to the difference of the elasticity of the layers and the elasticity of the positive electrode layer, the current collector deforms, and cracks are generated in the negative electrode layer or the positive electrode layer. In particular, in an all-solid battery using an inorganic solid electrolyte, since it is necessary to perform pressing at a very high pressure during manufacturing, the occurrence of cracks becomes remarkable.
Disclosure of Invention
The invention aims to provide a solid-state battery and a preparation method of the solid-state battery, which are used for solving the problems that in an inner string battery, due to the fact that a plurality of bipolar electrodes are laminated, short circuit is easy to occur, and deformation of a current collector and cracks are generated in a negative electrode layer or a positive electrode layer. The invention only needs one composite current collector, does not need to adopt extra means to prevent short circuit, and greatly improves the energy density.
The purpose of the invention is realized by the following technical scheme:
a solid-state battery is composed of n solid-state stacked units; each solid laminated unit comprises a composite current collector 3, a positive electrode layer 2 and a solid electrolyte layer 1, and the solid laminated units are stacked mutually to realize internal series connection;
the composite current collector 3 includes a first current collector layer 31 and a second current collector layer 32.
Further, the first current collector layer 31 may be an aluminum foil, a nickel mesh, or SUS; the second current collector layer 32 is one or a combination of amorphous carbon, gold, platinum, palladium, silicon, silver, aluminum, bismuth, tin and zinc, and lithium ions extracted from the anode form an alloy with the second current collector through the solid electrolyte layer 1.
Further, a 3-dimensional structure thin film is formed on the surface of the first current collector through magnetron sputtering/3D printing/evaporation, and the thin film is the second current collector.
Further, the first current collector layer 31 has a thickness of 4 to 20 μm; the second current collector layer 32 has a thickness of 2-10 microns.
A method of making a solid-state battery, comprising the steps of:
s1, coating the positive electrode on the composite current collector 3 to form a first pole piece;
s2, coating the solid electrolyte on the positive electrode to form a solid electrolyte unit, and forming a second pole piece together with the first pole piece;
s3, cutting the second pole piece into solid laminated units according to the design size;
s4, the design requires stacking n solid-state stacked cells to form a solid-state battery.
Further, in step S1, the positive electrode in the first electrode sheet includes a positive active material, a solid electrolyte and an additive, and both sides of the positive active material are coated with an insulating ceramic.
Further, in step S3, the cut solid laminated unit has a length of 10mm to 1000mm, preferably 200mm to 500 mm.
Further, in step S4, 1. ltoreq. n.ltoreq.200, preferably 2 to 20.
Compared with the prior art, the invention has the beneficial effects that:
the solid-state battery is composed of n solid-state laminated units, each laminated unit comprises a composite current collector, a positive electrode layer and a solid electrolyte layer, and the n solid-state laminated units are mutually connected in series to form the solid-state battery with the interior connected in series, so that the voltage of the battery is improved; lithium separated from the positive electrode in the charging and discharging process forms alloy with the second current collector layer of the composite current collector, and the alloy is uniformly deposited on the surface of the current collector, so that the energy density of the solid-state battery is greatly improved due to the absence of the negative electrode in the structure; the preparation process (lamination process) is simple and has no short circuit risk.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 a solid state stacked cell;
FIG. 2 is a two-layer solid-state battery;
fig. 3 a multilayer solid-state battery;
fig. 4 a multilayer solid-state battery fabrication method.
In the figure, 1, a solid electrolyte layer 2, a positive electrode layer 3, a composite current collector 31, a first current collector layer 32 and a second current collector layer are shown.
Detailed Description
The invention is further illustrated by the following examples:
the present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to 3, the solid-state battery of the present invention is constituted by n solid-state stacked units; each of the solid-state laminated units includes a composite current collector 3, a positive electrode layer 2, and a solid-state electrolyte layer 1. The internal series connection is realized by the mutual stacking of the solid-state laminated units, and the battery voltage is improved.
The composite current collector includes a first current collector layer 31 and a second current collector layer 32.
Wherein the first current collector layer 31 may be an aluminum foil, a nickel mesh, or SUS. The second current collector layer 32 is one or a combination of amorphous carbon, gold, platinum, palladium, silicon, silver, aluminum, bismuth, tin and zinc, and lithium ions extracted from the anode form an alloy with the second current collector through the solid electrolyte layer 1.
And forming a 3-dimensional structure film on the surface of the first current collector by means of magnetron sputtering/3D printing/evaporation, namely forming a second current collector.
The first current collector layer 31 has a thickness of 4 to 20 micrometers; the second current collector layer 32 has a thickness of 2-10 microns.
In the invention, only one surface is coated with the positive electrode, and the negative electrode is not required to be coated, and lithium ions are directly embedded into the composite current collector 3. Lithium that the positive pole was deviate from among the charge-discharge process forms the alloy with the second current collector layer 32 of compound mass flow body, at the even deposit of mass flow body surface, because of there is not the negative pole in the structure, only needs a compound mass flow body 3, and the process of piling up is simple, only for solid-state range upon range of unit, need not take extra means to prevent the short circuit, improves solid-state battery energy density by a wide margin.
The preparation method of the solid-state battery comprises the following steps:
s1, coating the positive electrode on the composite current collector 3 to form a first pole piece;
s2, coating the solid electrolyte on the positive electrode to form a solid electrolyte layer 1, and forming a second pole piece together with the first pole piece;
s3, cutting the second pole piece into solid laminated units according to the design size;
s4, the design requires stacking n solid-state stacked cells to form a solid-state battery, as shown in fig. 3.
In step S1, the positive electrode in the first electrode sheet includes a positive active material, a solid electrolyte and an additive, and both sides of the positive active material are coated with an insulating ceramic.
In step S3, the cut solid laminated unit has a length of 10mm-1000mm, preferably 200-500 mm.
In step S4, n is 1. ltoreq. n.ltoreq.200, preferably 2 to 20.
Example 1
A solid-state battery is composed of 2 solid-state stacked units; the solid-state laminated unit includes a composite current collector 3, a positive electrode layer 2, and a solid-state electrolyte layer 1. The composite current collector 3 includes a first current collector layer 31 and a second current collector layer 32.
The first current collector of the composite current collector is an aluminum foil, and a film with a 3-dimensional structure formed by magnetron sputtering silver on the surface of the aluminum foil is a second current collector to form the composite current collector 3.
And coating the positive electrode on the composite current collector 3 to form a first pole piece.
The positive electrode used in this embodiment is not limited, and is formed by using a common positive electrode material, an active material, a solid electrolyte and an additive, wherein the active material is NCM622 positive electrode material, the solid electrolyte is Li6PS5Cl, and the additive includes PVDF and VGCF.
And coating the solid electrolyte on the positive electrode to form a solid electrolyte layer 1, and forming a second pole piece together with the first pole piece.
The solid electrolyte used in the solid electrolyte layer 1 is not limited, and is a common one, and is composed of a solid electrolyte and an additive, wherein the solid electrolyte is Li6PS5Cl, and the additive is PVDF.
The second pole piece was cut into solid state stacked units in the size of 200mm by 200 mm.
2 solid-state stacked units were stacked to form a solid-state battery.
In this embodiment, the voltage plateau is 7.4V.
Example 2
A solid-state battery is composed of 4 solid-state stacked units; the solid-state laminated unit includes a composite current collector 3, a positive electrode layer 2, and a solid-state electrolyte layer 1. The composite current collector 3 includes a first current collector layer 31 and a second current collector layer 32.
The first current collector of the composite current collector is an aluminum foil, and a film with a 3-dimensional structure formed by magnetron sputtering silver on the surface of the aluminum foil is a second current collector to form the composite current collector 3.
And coating the positive electrode on the composite current collector 3 to form a first pole piece.
The positive electrode used in this embodiment is not limited, and is formed by using a common positive electrode material, an active material, a solid electrolyte and an additive, wherein the active material is NCM622 positive electrode material, the solid electrolyte is Li6PS5Cl, and the additive includes PVDF and VGCF.
And coating the solid electrolyte on the positive electrode to form a solid electrolyte layer 1, and forming a second pole piece together with the first pole piece.
The solid electrolyte used in the solid electrolyte layer 1 is not limited, and is a common one, and is composed of a solid electrolyte and an additive, wherein the solid electrolyte is Li6PS5Cl, and the additive is PVDF.
The second pole piece was cut into solid state stacked units in the size of 200mm by 200 mm.
4 solid-state stacked units were stacked to form a solid-state battery.
In this embodiment, the voltage plateau is 14.8V.
Example 3
A solid-state battery is composed of 10 solid-state stacked units; the solid-state laminated unit includes a composite current collector 3, a positive electrode layer 2, and a solid-state electrolyte layer 1. The composite current collector 3 includes a first current collector layer 31 and a second current collector layer 32.
The first current collector of the composite current collector 3 is an aluminum foil, and a film with a 3-dimensional structure formed by magnetron sputtering silver on the surface of the aluminum foil is a second current collector to form the composite current collector;
and coating the positive electrode on the composite current collector 3 to form a first pole piece.
The positive electrode used in this embodiment is not limited, and is formed by using a common positive electrode material, an active material, a solid electrolyte and an additive, wherein the active material is NCM622 positive electrode material, the solid electrolyte is Li6PS5Cl, and the additive includes PVDF and VGCF.
And coating the solid electrolyte on the positive electrode to form a solid electrolyte layer 1, and forming a second pole piece together with the first pole piece.
The solid electrolyte used in the solid electrolyte layer 1 is not limited, and is a common one, and is composed of a solid electrolyte and an additive, wherein the solid electrolyte is Li6PS5Cl, and the additive is PVDF.
The second pole piece was cut into solid state stacked units in the size of 200mm by 200 mm.
10 solid-state stacked units were stacked to form a solid-state battery.
In this embodiment, the voltage plateau is 37V.
Example 4
A solid-state battery is composed of 20 solid-state stacked units; the solid-state laminated unit includes a composite current collector 3, a positive electrode layer 2, and a solid-state electrolyte layer 1. The composite current collector 3 includes a first current collector layer 31 and a second current collector layer 32.
The first current collector of the composite current collector 3 is an aluminum foil, and a film with a 3-dimensional structure formed by magnetron sputtering silver on the surface of the aluminum foil is a second current collector to form the composite current collector.
And coating the positive electrode on the composite current collector 3 to form a first pole piece.
The positive electrode used in this embodiment is not limited, and is formed by using a common positive electrode material, an active material, a solid electrolyte and an additive, wherein the active material is NCM622 positive electrode material, the solid electrolyte is Li6PS5Cl, and the additive includes PVDF and VGCF.
And coating the solid electrolyte on the positive electrode to form a solid electrolyte layer 1, and forming a second pole piece together with the first pole piece.
The solid electrolyte used in the solid electrolyte layer 1 is not limited, and is a common one, and is composed of a solid electrolyte and an additive, wherein the solid electrolyte is Li6PS5Cl, and the additive is PVDF.
The second pole piece was cut into solid state stacked units in the size of 200mm by 200 mm.
20 solid-state stacked units were stacked to form a solid-state battery.
In this embodiment, the voltage plateau is 74V.
Example 5
A solid-state battery is composed of 2 solid-state stacked units; the solid-state laminated unit includes a composite current collector 3, a positive electrode layer 2, and a solid-state electrolyte layer 1. The composite current collector 3 includes a first current collector layer 31 and a second current collector layer 32.
The first current collector of the composite current collector is SUS, and gold is magnetically sputtered on the surface of the SUS to form a film with a 3-dimensional structure, namely the second current collector, so that the composite current collector is formed.
And coating the positive electrode on the composite current collector 3 to form a first pole piece.
The positive electrode used in this embodiment is not limited, and is formed by using a common positive electrode material, an active material, a solid electrolyte and an additive, wherein the active material is NCM622 positive electrode material, the solid electrolyte is Li6PS5Cl, and the additive includes PVDF and VGCF.
The solid electrolyte is coated on the positive electrode to form a solid electrolyte layer 1, and the solid electrolyte layer and the first pole piece form a second pole piece.
The solid electrolyte used in the solid electrolyte layer 1 is not limited, and is a common one, and is composed of a solid electrolyte and an additive, wherein the solid electrolyte is Li6PS5Cl, and the additive is PVDF.
The second pole piece was cut into solid state stacked units in the size of 200mm by 200 mm.
2 solid-state stacked units were stacked to form a solid-state battery.
In this embodiment, the voltage plateau is 7.4V.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A solid-state battery characterized by: is composed of n solid laminated units; each solid laminated unit comprises a composite current collector (3), a positive electrode layer (2) and a solid electrolyte layer (1), and the solid laminated units are stacked to realize internal series connection;
the composite current collector (3) comprises a first current collector layer (31) and a second current collector layer (32).
2. A solid-state battery according to claim 1, characterized in that: the first current collector layer (31) is aluminum foil, nickel mesh or SUS; the second current collector layer (32) is one or the combination of amorphous carbon, gold, platinum, palladium, silicon, silver, aluminum, bismuth, tin and zinc, and lithium ions extracted from the anode form alloy with the second current collector through the solid electrolyte layer (1).
3. A solid-state battery according to claim 1, characterized in that: and forming a 3-dimensional structure film on the surface of the first current collector by means of magnetron sputtering/3D printing/evaporation, namely forming a second current collector.
4. A solid-state battery according to claim 1, characterized in that: the first current collector layer (31) has a thickness of 4-20 microns; the second current collector layer (32) has a thickness of 2-10 microns.
5. The method for manufacturing a solid-state battery according to claim 1, comprising the steps of:
s1, coating the positive electrode on the composite current collector (3) to form a first pole piece;
s2, coating the solid electrolyte on the positive electrode to form a solid electrolyte layer (1) which forms a second pole piece together with the first pole piece;
s3, cutting the second pole piece into solid laminated units according to the design size;
s4, the design requires stacking n solid-state stacked cells to form a solid-state battery.
6. The method for manufacturing a solid-state battery according to claim 5, characterized in that: in step S1, the positive electrode in the first electrode sheet includes a positive active material, a solid electrolyte and an additive, and both sides of the positive active material are coated with an insulating ceramic.
7. The method for manufacturing a solid-state battery according to claim 5, characterized in that: in step S3, the cut solid laminated unit has a length of 10mm to 1000 mm.
8. The method for manufacturing a solid-state battery according to claim 7, characterized in that: the length of the solid laminated unit after cutting is 200mm-500 mm.
9. The method for manufacturing a solid-state battery according to claim 1, characterized in that: in step S4, n is greater than or equal to 1 and less than or equal to 200.
10. The method for manufacturing a solid-state battery according to claim 9, characterized in that: n is 2 to 20.
CN202210601289.7A 2022-05-30 2022-05-30 Solid-state battery and preparation method thereof Pending CN114843620A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024045688A1 (en) * 2022-09-02 2024-03-07 中国第一汽车股份有限公司 Anti-short-circuit solid-state battery and preparation method therefor
WO2024059970A1 (en) * 2022-09-19 2024-03-28 宁德时代新能源科技股份有限公司 Battery cell, battery and electric device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024045688A1 (en) * 2022-09-02 2024-03-07 中国第一汽车股份有限公司 Anti-short-circuit solid-state battery and preparation method therefor
WO2024059970A1 (en) * 2022-09-19 2024-03-28 宁德时代新能源科技股份有限公司 Battery cell, battery and electric device

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