CN115472917A - Method for producing solid-state battery and solid-state battery - Google Patents

Method for producing solid-state battery and solid-state battery Download PDF

Info

Publication number
CN115472917A
CN115472917A CN202211203182.3A CN202211203182A CN115472917A CN 115472917 A CN115472917 A CN 115472917A CN 202211203182 A CN202211203182 A CN 202211203182A CN 115472917 A CN115472917 A CN 115472917A
Authority
CN
China
Prior art keywords
solid
electrolyte membrane
state
lithium
negative
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.)
Pending
Application number
CN202211203182.3A
Other languages
Chinese (zh)
Inventor
阳如坤
贺雁
张弢
柯奥
储成亮
吴学科
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.)
Shenzhen Geesun Intelligent Technology Co Ltd
Original Assignee
Shenzhen Geesun Intelligent Technology 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 Shenzhen Geesun Intelligent Technology Co Ltd filed Critical Shenzhen Geesun Intelligent Technology Co Ltd
Priority to CN202211203182.3A priority Critical patent/CN115472917A/en
Publication of CN115472917A publication Critical patent/CN115472917A/en
Pending 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
    • H01M10/058—Construction or manufacture
    • H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or 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
    • H01M10/056—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
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
    • 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
    • H01M2300/0082—Organic polymers
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Secondary Cells (AREA)

Abstract

The invention provides a preparation method of a solid-state battery and the solid-state battery, and relates to the technical field of battery manufacturing. The solid electrolyte membrane, the positive plate and the negative plate are all in a continuous roll shape, so that the roll-to-roll rapid continuous production of the electrode and the solid electrolyte membrane can be realized, then the battery core is formed through a composite lamination process, the interface fusion among the positive plate, the negative plate and the solid electrolyte membrane is realized, interface modification layers are arranged between the solid electrolyte membrane and the positive plate and between the solid electrolyte membrane and the negative plate, the problem of dead zones existing among all layers of the solid battery is solved, and the stability of the interface fusion is improved.

Description

Method for producing solid-state battery and solid-state battery
Technical Field
The invention relates to the technical field of battery manufacturing, in particular to a solid-state battery and a preparation method thereof.
Background
In a solid-state battery, the electrodes and the solid electrolyte membrane are in the solid state, and a liquid electrolyte is not used. Therefore, there is a problem that a dead zone (void having no ion conductivity) is generated at the interface between the electrode and the solid electrolyte membrane. When the surface of the electrode is not uniform due to the shape of the electrode active material, the aggregation of the conductive material, or the interval of the binder polymer, more dead zones are generated, so that the resistance between the electrode and the solid electrolyte membrane may increase and the life characteristics of the battery may be adversely affected.
In addition, the production of the electrode and the solid electrolyte of the solid battery is mainly sheet production at present, the production cost is high, the efficiency is low, and the electrode and the electrolyte are difficult to be applied to the mass production of the power battery.
Disclosure of Invention
The invention provides a solid-state battery and a preparation method thereof, for example, a continuous winding process is adopted, rapid connection production is realized, a battery core is manufactured through a composite lamination process, the dead zone problem can be effectively solved, the stability of interface fusion is improved, and the service life of the battery is prolonged.
Embodiments of the invention may be implemented as follows:
in a first aspect, the present invention provides a method for manufacturing a solid-state battery, including:
carrying out primary compounding on the solid electrolyte membrane and the negative plate to form a negative composite material belt;
carrying out secondary compounding on the negative electrode composite material belt and the positive plate to form a pole piece composite material belt;
stacking the pole piece composite material strips to form a battery core;
pressing the battery cell;
packaging the battery cell and forming a solid-state battery;
the solid electrolyte membrane, the positive plate and the negative plate are all in a continuous roll shape, interface modification layers are arranged between the solid electrolyte membrane and the positive plate and between the solid electrolyte membrane and the negative plate, and the interface modification layers are used for promoting the combination of the solid electrolyte and the positive plate or the negative plate.
In an alternative embodiment, before the step of compounding the solid electrolyte membrane and the negative electrode sheet once, the preparation method further includes:
and forming the interface modification layer on the two side surfaces of the solid electrolyte membrane.
In an alternative embodiment, before the step of primary compounding the solid electrolyte membrane and the negative electrode sheet, the preparation method further includes:
forming the interface modification layers on the surfaces of the two sides of the positive plate;
and forming the interface modification layer on the surfaces of the two sides of the negative plate.
In an optional embodiment, the step of pressing the battery cell includes:
cold pressing the stacked battery core;
and carrying out hot pressing on the battery cell formed by stacking.
In an alternative embodiment, before the step of primary compounding the solid electrolyte membrane and the negative electrode sheet, the preparation method further includes:
and slicing the negative plate.
In an alternative embodiment, before the step of secondarily compounding the negative electrode composite material tape and the positive electrode sheet, the preparation method further includes:
and slicing the positive plate.
In another aspect, the present invention provides a solid-state battery prepared by the foregoing method for preparing a solid-state battery, where the solid-state battery includes a plurality of positive plates, a plurality of negative plates, and a solid-state electrolyte film, the positive plates and the negative plates are stacked in an interlaced manner, the solid-state electrolyte film is inserted between the positive plates and the negative plates in an interlaced manner, and interface modification layers are disposed between the solid-state electrolyte film and the positive plates and between the solid-state electrolyte film and the negative plates, and the interface modification layers are used to promote the bonding between the solid-state electrolyte and the positive plates or the negative plates.
In alternative embodiments, the material of the solid electrolyte membrane comprises one or more of a sulfide, an oxide, and an organic material.
In an alternative embodiment, the positive electrode sheet is formed by fusing at least one of lithium cobaltate, lithium manganate, lithium nickel manganate, lithium iron phosphate, lithium vanadium phosphate, lithium nickel cobalt manganate, lithium nickel cobalt aluminate, and lithium-rich lithium manganate with the solid electrolyte material.
In an alternative embodiment, the negative electrode sheet is formed by fusing at least one of graphite, lithium titanate, niobium-titanium oxide, silicon-carbon composite material and elemental lithium with a solid electrolyte material.
In an alternative embodiment, the material of the interface modification layer includes at least one of ethylene oxide, polypropylene oxide, polyvinylidene fluoride copolymer, polytetrafluoroethylene, polyethylene copolymer, polyacrylonitrile, molybdenum disulfide, lithium fluoride, lithium cobaltate, lithium nickelate, and lithium manganate.
In an alternative embodiment, the positive electrode sheet and the negative electrode sheet form a series structure or a parallel structure after being laminated.
The beneficial effects of the embodiment of the invention include, for example:
according to the solid-state battery and the preparation method thereof provided by the embodiment of the invention, the solid-state electrolyte membrane and the negative plate are compounded together through a one-time compounding process to form the negative electrode compound material belt, then the negative electrode compound material belt and the positive plate are compounded for the second time to form the pole piece compound material belt, the pole piece compound material belt is formed into the battery cell through a stacking process, and the battery cell is pressed and packaged to form the solid-state battery, wherein the solid-state electrolyte membrane, the positive plate and the negative plate are all in a continuous roll shape, so that the rapid and continuous roll-to-roll production of the electrode and the solid-state electrolyte membrane can be realized, then the battery cell is formed through a compounding and laminating process, the interface fusion among the positive plate, the negative plate and the solid-state electrolyte membrane is realized, the interface modification layers are arranged between the solid-state electrolyte membrane and the positive plate and between the solid-state electrolyte membrane and the negative plate, and the interface modification layers are used for promoting the combination between the solid-state electrolyte and the positive plate or the negative plate, so that the dead zone problem existing among the layers of the solid-state battery is solved, and the stability of the interface fusion is improved. Compared with the prior art, the solid-state battery provided by the invention adopts a continuous winding process, realizes rapid connection production, and is manufactured into the battery cell through a composite lamination process, so that the dead zone problem can be effectively solved, the stability of interface fusion is improved, and the service life of the battery is prolonged.
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 is a block diagram illustrating steps of a method for manufacturing a solid-state battery according to the present invention;
fig. 2 is a process equipment diagram of a method for manufacturing a solid-state battery according to the present invention;
fig. 3 is a schematic structural diagram of a solid-state battery provided by the present invention.
Icon: 100-solid state battery; 110-positive plate; 130-negative plate; 150-a solid electrolyte membrane; 170-an interface-modifying layer; 200-a cathode unwinding mechanism; 210-electrolyte unwinding mechanism; 230-negative pole compound roller; 300-a positive pole unwinding mechanism; 310-positive composite roll; 330-stacking table.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The mechanisms of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
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.
In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which the product of the present invention is used to usually place, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
As disclosed in the background art, the electrode of the solid-state electrode and the solid-state electrolyte membrane in the prior art are mainly produced in a sheet type, that is, the electrode sheet and the solid-state electrolyte membrane in a sheet structure are laminated to form a battery core, which cannot be continuously produced, and thus, the production cost is high, the efficiency is low, and the method is difficult to be applied to the mass production of power batteries. And the conventional solid-state battery, in which the electrodes and the solid electrolyte membrane are in a solid state and a liquid electrolyte is not used, does not combine and stack the layers during the production process, resulting in a low degree of interlayer bonding. Therefore, there is a problem that a dead zone (void having no ion conductivity) is generated at the interface between the electrode and the solid electrolyte membrane. When the surface of the electrode is not uniform due to the shape of the electrode active material, the aggregation of the conductive material, or the interval of the binder polymer, more dead zones are generated, so that the resistance between the electrode and the solid electrolyte membrane may increase, and the life characteristics of the battery may be adversely affected.
In order to solve the above problems, the present invention provides a novel solid-state battery and a method for manufacturing the same. It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
With reference to fig. 1 and fig. 2, this embodiment provides a method for manufacturing a solid-state battery 100 according to the present invention, which employs a continuous winding process to achieve rapid production, and manufactures a battery core through a composite lamination process, so as to effectively solve the dead zone problem, improve the stability of interface fusion, and prolong the service life of the battery.
The method for manufacturing the solid-state battery 100 provided in this embodiment includes the following steps:
s1: the solid electrolyte membrane 150 and the negative electrode sheet 130 are once combined to form a negative electrode composite material tape.
Specifically, the cathode unwinding mechanism 200 and the electrolyte unwinding mechanism 210 may be used to unwind the cathode sheet 130 and the solid electrolyte membrane 150, and the cathode combining roller 230 may be used to combine the cathode sheet 130 and the solid electrolyte membrane 150 into a whole, so as to complete one-time combination.
In this embodiment, before the first combination, the negative electrode sheet 130 may be sliced, that is, a negative electrode cutting mechanism is disposed on the discharging side of the negative electrode unwinding mechanism 200 to cut the negative electrode, and the cut negative electrode sheet 130 and the solid electrolyte membrane 150 are combined into a whole.
When the cathode sheet is actually unreeled, unreeling can be achieved through the two cathode unreeling mechanisms 200, the upper side and the lower side of the cathode sheet 130 are coated through the two electrolyte unreeling mechanisms 210, and the cathode composite material tape of the solid electrolyte membrane 150-the cathode sheet 130-the solid electrolyte membrane 150 is formed after compounding.
S2: and compounding the negative electrode composite material belt and the positive plate 110 for the second time to form the pole piece composite material belt.
Specifically, the positive electrode unwinding mechanism 300 may be used to unwind the positive electrode sheet 110, and the positive electrode compound roller 310 may be used to compound the negative electrode compound material tape and the positive electrode sheet 110 together to complete secondary compounding.
In this embodiment, before the secondary compounding, the positive electrode sheet 110 may also be sliced, that is, the positive electrode cutting mechanism is disposed on the discharging side of the positive electrode unwinding mechanism 300, so as to cut the positive electrode, and the cut positive electrode sheet 110 and the negative electrode composite material tape are compounded into a whole.
When the cathode sheet is actually unreeled, the unreeling can be realized through the two cathode unreeling mechanisms 300, and the two cathode unreeling mechanisms 300 are vertically arranged, so that the cathode sheets 110 can be respectively compounded on the surfaces of the two solid electrolyte membranes 150, and the composite material belt of the cathode sheets is formed.
It should be noted that, in the present embodiment, the solid electrolyte membrane 150, the positive electrode sheet 110, and the negative electrode sheet 130 all adopt a continuous roll shape, which can implement a continuous unwinding and stacking process, thereby greatly improving the preparation efficiency and maintaining the consistency of the battery as much as possible. After the pole piece composite material strip is formed, the pole piece composite material strip can be subjected to panoramic detection by using a CCD, edge sealing and short circuit tests are completed, and then the pole piece composite material strip is sent to the lamination table 330.
It should be noted that, the interface-modifying layer 170 may be formed by some processes during the film formation of the positive electrode sheet 110, the negative electrode sheet 130, or the solid electrolyte membrane 150, so that the interface-modifying layer 170 is formed between the negative electrode sheet 130 and the solid electrolyte membrane 150 after the lamination. For example, before the solid electrolyte membrane 150 is formed into a film, the interface modification layers 170 may be formed on the two side surfaces of the solid electrolyte, so that the interface modification layers 170 are disposed between the solid electrolyte membrane 150 and the positive electrode sheet 110 and between the solid electrolyte membrane 150 and the negative electrode sheet 130 in the two subsequent compounding processes, and the interface modification layers 170 are used for promoting the bonding between the solid electrolyte membrane and the positive electrode sheet 110 or the negative electrode sheet 130. The interface modification layer 170 may be formed by coating an interface material, or may be formed by soaking the solid electrolyte membrane 150 in an interface material solution, and the forming process of the interface modification layer 170 is not specifically limited herein.
In other preferred embodiments of the present invention, before the primary lamination, the interface modification layers 170 may be formed on both surfaces of the positive electrode sheet 110, and the interface modification layers 170 may be formed on both surfaces of the negative electrode sheet 130. Thus, the interface modification layers 170 are ensured to be arranged between the solid electrolyte membrane 150 and the positive plate 110 and between the solid electrolyte membrane 150 and the negative plate 130 during subsequent stacking and molding. The interface modification layers 170 on the positive electrode sheet 110 and the negative electrode sheet 130 may be made of different materials, or may be made of the same material.
It should be noted that the interface modification layer 170 in this embodiment may also be used as an SEI film formed during the operation of the battery after the solid-state battery 100 is formed. The interface modification layers 170 on both sides of the solid electrolyte membrane 150 corresponding to the positive and negative electrodes may be made of the same material or different materials.
S3: and stacking the pole piece composite material strips to form the battery core.
Specifically, stacking of the pole piece composite tape can be accomplished using a stacking station 330, which stacking process is consistent with conventional lamination processes. The battery core is manufactured by a composite lamination process, and the series connection or the parallel connection in the battery can be realized.
S4: and pressing the battery cell.
Specifically, the lamination process can be performed on the stacked battery cell, so that the fusion degree between layers in the battery cell is better. Specifically, the novel battery cell can be firstly stacked to be cold-pressed, and the battery cell formed by stacking is hot-pressed.
It should be noted that, here, the interface modification layer 170 can be pressed through cold pressing and hot pressing processes, so that the interface modification layer 170 is further tightly attached to the positive plate 110, the interface modification layer 170 is further tightly attached to the negative plate 130, and thus the generation of a dead zone is further avoided.
S5: the cells are encapsulated, and a solid-state battery 100 is formed.
Specifically, after hot pressing, the cells may be tested, and a plurality of cells may be packaged together, thereby forming the solid-state battery 100.
The method for manufacturing the solid-state battery 100 provided by this embodiment has at least the following advantages:
(1) Each layer of material in the solid-state battery 100 formed in the embodiment can be independently subjected to roll-to-roll continuous and rapid production, so that the production efficiency is greatly improved, and the method is suitable for industrial production;
(2) The solid-state battery 100 is manufactured through a composite lamination process, and the series connection or the parallel connection inside the battery can be realized;
(3) In this embodiment, the positive electrode sheet 110, the solid electrolyte membrane 150, and the negative electrode sheet 130 may ensure the bonding capability of the interface through the respective interface modification layer 170, so as to improve the use effect of the all-solid battery 100;
(4) The interface modification layer 170 used in this embodiment may also be used as an SEI film generated during the operation of the battery.
Referring to fig. 3 in combination, the present embodiment also provides a solid-state battery 100, which is prepared by the foregoing preparation method. The structure and characteristics of the solid-state battery 100 are described below.
The solid-state battery 100 provided by this embodiment includes a plurality of positive electrode sheets 110, a plurality of negative electrode sheets 130, and a solid-state electrolyte membrane 150, the plurality of positive electrode sheets 110 and the plurality of negative electrode sheets 130 are stacked in a staggered manner, the solid-state electrolyte membrane 150 is disposed between the adjacent positive electrode sheets 110 and the negative electrode sheets 130 in a staggered manner, interface modification layers 170 are disposed between the solid-state electrolyte membrane 150 and the positive electrode sheets 110, and between the solid-state electrolyte membrane 150 and the negative electrode sheets 130, and the interface modification layers 170 are used for promoting the combination between the solid-state electrolyte and the positive electrode sheets 110 or the negative electrode sheets 130.
In this embodiment, the plurality of positive electrode sheets 110 and the plurality of negative electrode sheets 130 are stacked in a staggered manner, the positive electrode sheets 110 and the negative electrode sheets 130 are formed by a lamination process, and the solid electrolyte membrane 150 is of a single-membrane structure, can be wound in a serpentine manner and penetrate between the positive electrode sheets 110 and the negative electrode sheets 130, and can realize series connection or parallel connection inside the battery.
In this embodiment, the interface-modifying layer 170 may be disposed on the solid electrolyte membrane 150 and attached to the positive electrode tab 110 or the negative electrode tab 130. In other preferred embodiments, the interface modification layer 170 may be disposed on both sides of the positive electrode tab 110 and the negative electrode tab 130, and the interface modification layer 170 is attached to the solid electrolyte membrane 150.
In the present embodiment, the positive electrode sheet 110 includes, but is not limited to, lithium cobaltate (LiCoO) 2 ) Lithium manganate (LiMn) 2 O 4 ) Lithium nickel manganese oxide (LiMn) 1.5 Ni 0.5 O 4 ) Lithium iron phosphate (LiFePO) 4 ) Lithium vanadium phosphate (Li) 3 V 2 (PO4) 3 ) Lithium nickel cobalt manganese oxide (LiNi) x Co y Mn 1-x-y O 2 ) Lithium nickel cobalt aluminate (LiNi) x Co y Al 1-x-y O 2 ) Lithium-rich lithium manganate (xLi 2 MnO) 3 ·(1-x)LiMO 2 ) Is fused with the solid state electrolyte material. Other additives may also be present in certain amounts. And the continuously rolled positive plate 110 needs to have a certain mechanical strength, which can meet the requirement of rapid and continuous production. Of course, the material of the positive electrode sheet 110 is also merely illustrative and is not limited.
In the present embodiment, the negative electrode sheet 130 includes, but is not limited to, graphite (C), lithium titanate (Li) 4 Ti 5 O 12 ) Niobium titanium oxide (TiNb) 2 O 7 ) At least one material of silicon (Si), a silicon-carbon composite material and simple substance lithium (Li) is fused with the solid electrolyte material. Other additives may also be present in certain amounts. And the continuously rolled negative electrode sheet 130 also needs to have a certain mechanical strength to meet the requirement of rapid and continuous production. Of course, the material of the negative electrode tab 130 is also merely illustrative and is not limited thereto.
In the present embodiment, the material of the solid electrolyte membrane 150 includes, but is not limited to, one or more of sulfide, oxide, and organic material. Other additives may also be present in certain amounts. And the continuously rolled solid electrolyte membrane 150 also needs to have a certain mechanical strength to meet the demand for rapid continuous production. Of course, the material of the solid electrolyte membrane 150 is also merely illustrative and not limitative herein.
In the present embodiment, the material of the interface modification layer 170 includes, but is not limited to, polyethylene oxide (PEO), polypropylene oxide, polyvinylidene fluoride (PVDF), polyvinylidene fluoride copolymer, polytetrafluoroethylene (PTFE), polyethylene (PE), polyethylene copolymer, polyacrylonitrile (PAN), molybdenum disulfide (MoS) 2 ) Lithium fluoride (LiF), lithium cobaltate (LiCoO) 2 ) Lithium nickelate (LiNiO) 2 ) Lithium manganate (LiMnO) 2 ) One or more of them. The interface modification layer 170 may also contain other additives in a certain amount.
In this embodiment, the positive electrode tab 110 and the negative electrode tab 130 can be formed in a series structure or a parallel structure through a lamination process, which is not particularly limited herein.
In summary, according to the solid-state battery 100 and the manufacturing method thereof provided by the embodiments of the present invention, the solid-state electrolyte membrane 150 and the negative electrode sheet 130 are composited together through a primary compounding process to form the negative electrode composite material tape, then the negative electrode composite material tape and the positive electrode sheet 110 are composited secondarily to form the pole piece composite material tape, the pole piece composite material tape is stacked to form the battery cell through a stacking process, and the battery cell is pressed and encapsulated to form the solid-state battery 100, wherein the solid-state electrolyte membrane 150, the positive electrode sheet 110, and the negative electrode sheet 130 are continuously rolled to achieve rapid and continuous roll production of the electrode and the solid-state electrolyte membrane 150, and then the battery cell is formed through a composite lamination process to achieve interface fusion among the positive electrode sheet 110, the negative electrode sheet 130, and the solid-state electrolyte membrane 150 and the positive electrode sheet 110, and the solid-state electrolyte membrane 150 and the negative electrode sheet 130 are all provided with the interface modification layers 170, and the interface modification layers 170 are used for promoting the solid-state electrolyte to be combined with the positive electrode sheet 110 or the negative electrode sheet 130, thereby solving the dead zone problem existing among the solid-state battery 100 and improving the stability of the interface fusion. Compared with the prior art, the solid-state battery 100 provided by the embodiment adopts a continuous winding process, realizes rapid connection production, and is manufactured into the battery core through a composite lamination process, so that the dead zone problem can be effectively solved, the stability of interface fusion is improved, and the service life of the battery is prolonged.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A method of manufacturing a solid-state battery, comprising:
compounding the solid electrolyte membrane and the negative plate for the first time to form a negative composite material belt;
carrying out secondary compounding on the negative electrode composite material belt and the positive plate to form a pole piece composite material belt;
stacking the pole piece composite material strips to form a battery core;
pressing the battery cell;
packaging the battery cell and forming a solid-state battery;
the solid electrolyte membrane, the positive plate and the negative plate are all in a continuous roll shape, interface modification layers are arranged between the solid electrolyte membrane and the positive plate and between the solid electrolyte membrane and the negative plate, and the interface modification layers are used for promoting the combination of the solid electrolyte membrane and the positive plate or the negative plate.
2. The method for producing a solid-state battery according to claim 1, wherein, before the step of once compounding the solid-state electrolyte membrane and the negative electrode sheet, the production method further comprises:
and forming the interface modification layer on the two side surfaces of the solid electrolyte membrane.
3. The production method of a solid-state battery according to claim 1, characterized in that, before the step of primary compounding the solid-state electrolyte membrane and the negative electrode sheet, the production method further comprises:
forming the interface modification layers on the surfaces of the two sides of the positive plate;
and forming the interface modification layers on the surfaces of the two sides of the negative plate.
4. The method for manufacturing a solid-state battery according to claim 1, wherein the step of pressing the cell includes:
cold pressing the stacked battery core;
and carrying out hot pressing on the battery core formed by stacking.
5. A solid-state battery produced by the method according to any one of claims 1 to 4, wherein the solid-state battery comprises a plurality of positive plates, a plurality of negative plates, and a solid-state electrolyte membrane, the positive plates and the negative plates are alternately stacked, the solid-state electrolyte membrane is alternately disposed between the adjacent positive plates and the adjacent negative plates, and interface modification layers are disposed between the solid-state electrolyte membrane and the positive plates and between the solid-state electrolyte membrane and the negative plates, and are used for promoting the bonding between the solid-state electrolyte and the positive plates or the negative plates.
6. The solid-state battery according to claim 5, wherein the material of the solid electrolyte membrane includes one or more of a sulfide, an oxide, and an organic material.
7. The solid-state battery according to claim 5, wherein the positive electrode sheet is formed by fusing at least one material selected from lithium cobaltate, lithium manganate, lithium nickel manganate, lithium iron phosphate, lithium vanadium phosphate, lithium nickel cobalt manganate, lithium nickel cobalt aluminate, and lithium-rich lithium manganate with a solid-state electrolyte material.
8. The solid-state battery according to claim 5, wherein the negative electrode sheet is formed by fusing at least one material selected from graphite, lithium titanate, niobium titanium oxide, silicon carbon composite, and elemental lithium with a solid-state electrolyte material.
9. The solid-state battery according to claim 5, wherein the material of the interface modification layer includes at least one of ethylene oxide, polypropylene oxide, polyvinylidene fluoride-based copolymer, polytetrafluoroethylene, polyethylene-based copolymer, polyacrylonitrile, molybdenum disulfide, lithium fluoride, lithium cobaltate, lithium nickelate, and lithium manganate.
10. The solid-state battery according to claim 5, wherein the positive electrode tab and the negative electrode tab are laminated to form a series structure or a parallel structure.
CN202211203182.3A 2022-09-29 2022-09-29 Method for producing solid-state battery and solid-state battery Pending CN115472917A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211203182.3A CN115472917A (en) 2022-09-29 2022-09-29 Method for producing solid-state battery and solid-state battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211203182.3A CN115472917A (en) 2022-09-29 2022-09-29 Method for producing solid-state battery and solid-state battery

Publications (1)

Publication Number Publication Date
CN115472917A true CN115472917A (en) 2022-12-13

Family

ID=84334762

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211203182.3A Pending CN115472917A (en) 2022-09-29 2022-09-29 Method for producing solid-state battery and solid-state battery

Country Status (1)

Country Link
CN (1) CN115472917A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116525753A (en) * 2023-06-27 2023-08-01 苏州清陶新能源科技有限公司 Preparation method and preparation device of composite pole piece and lithium ion battery
CN116581250A (en) * 2023-07-12 2023-08-11 苏州清陶新能源科技有限公司 Composite pole piece, preparation method thereof and lithium ion battery

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116525753A (en) * 2023-06-27 2023-08-01 苏州清陶新能源科技有限公司 Preparation method and preparation device of composite pole piece and lithium ion battery
CN116525753B (en) * 2023-06-27 2023-10-13 苏州清陶新能源科技有限公司 Preparation method and preparation device of composite pole piece and lithium ion battery
CN116581250A (en) * 2023-07-12 2023-08-11 苏州清陶新能源科技有限公司 Composite pole piece, preparation method thereof and lithium ion battery
CN116581250B (en) * 2023-07-12 2023-09-05 苏州清陶新能源科技有限公司 Composite pole piece, preparation method thereof and lithium ion battery

Similar Documents

Publication Publication Date Title
CN106997963B (en) Method for manufacturing pouch type battery
KR101590217B1 (en) Method for manufacturing electorde assembly and electrode assembly manufactured thereby
JP5697276B2 (en) Electrode assembly having novel structure and method of manufacturing the same
KR100987300B1 (en) Stack and folding-typed Electrode Assembly and Method for Preparation of the Same
US7820337B2 (en) Electrochemical device
WO2014034708A1 (en) Electrode plate and secondary battery
CN115472917A (en) Method for producing solid-state battery and solid-state battery
US20210020921A1 (en) Battery cell and battery using the same
KR20090027314A (en) Secondary battery of improved stability by both sides adhesive tape
JP2018174070A (en) Lithium ion secondary battery
CN106207249A (en) Lithium rechargeable battery
KR102650963B1 (en) Electrode assembly, lithium battery including the same, and method of manufacturing the electrode assembly
KR101156954B1 (en) Electrode Assembly with Excellent Weldability between Electrode Lead and Electrode Tabs and Secondary Battery Comprising the Same
JP2020095871A (en) Laminated battery and method of manufacturing the same
CN111864274B (en) All-solid-state battery and method for manufacturing all-solid-state battery
CN112447942B (en) Square lithium metal battery and preparation method thereof
WO2017110684A1 (en) Secondary cell and method for manufacturing same
JP2018170142A (en) Lithium ion secondary battery
JP6855882B2 (en) Positive electrode and lithium ion secondary battery
JP2011165930A (en) Power storage device, and method of manufacturing shared negative electrode of the same
CN110265628B (en) Positive electrode and lithium ion secondary battery
KR102164576B1 (en) Method Preparing Electrode Assembly And Electrode Assembly Prepared Using the Same
JP2019169307A (en) Electrochemical element
JPH08138726A (en) Layer-built lithium secondary battery
KR102049012B1 (en) Folding type Electrode assembly and method for fabricating the same

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination