WO2023184878A1 - Collecteur de courant de batterie au lithium ternaire à haute sécurité, électrode et batterie au lithium - Google Patents

Collecteur de courant de batterie au lithium ternaire à haute sécurité, électrode et batterie au lithium Download PDF

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WO2023184878A1
WO2023184878A1 PCT/CN2022/118303 CN2022118303W WO2023184878A1 WO 2023184878 A1 WO2023184878 A1 WO 2023184878A1 CN 2022118303 W CN2022118303 W CN 2022118303W WO 2023184878 A1 WO2023184878 A1 WO 2023184878A1
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electrode
electrode layer
current collector
slurry
lithium
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PCT/CN2022/118303
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English (en)
Chinese (zh)
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刘福海
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佛山市中技烯米新材料有限公司
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Publication of WO2023184878A1 publication Critical patent/WO2023184878A1/fr

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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
    • 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
    • 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
    • H01M10/42—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
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621—Binders
    • H01M4/622—Binders being polymers
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • This application relates to the technical field of lithium batteries, and in particular to a highly safe ternary lithium battery current collector, electrode, and lithium battery.
  • lithium batteries Compared with traditional batteries, lithium batteries have the characteristics of high energy density, long service life and no memory effect, so they are widely favored in various fields, such as mobile phones, computers and other electronic products, or electric vehicles of different power types.
  • the current collector is one of the indispensable components of the lithium battery. It can not only carry the active material, but also collect and output the current generated by the electrode active material, which is beneficial to reducing the internal resistance of the lithium battery and improving the Coulombic efficiency of the battery. , cycle stability and rate performance.
  • the current collector is a key material of lithium batteries. On the one hand, it carries powdery active materials, and on the other hand, it collects current.
  • the positive active material of ternary lithium batteries is generally lithium nickel cobalt manganate, with the chemical formula LiNix Co y Mn 1-xy O 2. It has a higher specific capacity and lower cost than the unit electrode material and is the most widely used. One of the battery materials. However, lithium nickel cobalt manganate has safety risks during use. Due to its strong activity and high energy, its safety is low.
  • the technical problem to be solved by this application is to provide a highly safe ternary lithium battery current collector for improving the safety of the ternary lithium battery.
  • the technical problem to be solved by this application is to provide an electrode for a lithium battery, which is highly safe and the electrode layer is not easy to detach.
  • the technical problem to be solved by this application is to provide a lithium battery that is highly safe, reliable and durable.
  • the present application provides a highly safe ternary lithium battery current collector, including aluminum foil and a safe conductive coating.
  • the safe conductive coating is made of conductive slurry, and the conductive slurry includes The following mass percentage components: 50% to 60% lithium iron phosphate and 40% to 50% first binder;
  • an electrode slurry is coated on the safety conductive coating to form an electrode layer, the electrode slurry includes an electrode material and a second binder, and the electrode material at least includes lithium nickel cobalt manganate.
  • the first adhesive includes one or more of an acrylic adhesive, a polystyrene adhesive, and an aziridine cross-linking agent.
  • the relative molecular weight of the first adhesive is 40,000 to 100,000.
  • the first adhesive is an acrylic adhesive.
  • the first adhesive includes a trifunctional acrylimine aziridine and an acrylic adhesive, and the mass of the trifunctional acrylimine aziridine is 1% to 5% of the mass of the acrylic resin.
  • the mass ratio of the lithium iron phosphate and the first binder is (53-57): (43-47).
  • the thickness of the safety conductive coating is 2 to 10 ⁇ m.
  • this application also provides an electrode for a lithium battery, including the above-mentioned current collector and an electrode layer.
  • the electrode layer is made of electrode slurry, and the electrode slurry includes an electrode material and a second binding agent. agent, the electrode material at least includes lithium nickel cobalt manganate;
  • the second binder is polyvinylidene fluoride, vinyl fluoride, styrene-butadiene rubber, fluorinated rubber, polyelectrolyte polymer, polyacrylic acid, polyvinyl alcohol , one or more of sodium carboxymethylcellulose.
  • the electrode layer includes a first electrode layer coated on the safety conductive coating and a second electrode layer coated on the first electrode layer, and the first electrode layer is composed of a first Made of conductive paste, the second electrode layer is made of second conductive paste;
  • the first electrode slurry includes lithium nickel cobalt manganate and a second binder; the lithium nickel cobalt manganate in the second conductive slurry is composed of lithium cobalt oxide, lithium manganate, lithium nickel cobalt oxide, lithium nickel An alternative to cobalt aluminum oxide and lithium iron phosphate.
  • this application also provides a lithium battery, including the above-mentioned current collector.
  • This application uses lithium iron phosphate as the main component of the safety conductive coating, and mixes it with the first binder to form a conductive slurry and coats it on the aluminum foil, which has the following effects: (1) Improves the performance of the electrode material (nickel cobalt manganese oxide) The adhesion between lithium) and aluminum foil reduces the interfacial resistance between the electrode material and the aluminum foil and improves the safety of lithium batteries; (2) lithium iron phosphate helps to improve the stability of the electrode material structure and reduces the Internal resistance, thereby improving the safety of lithium batteries; (3) Reduce polarization, improve the rate performance of lithium batteries, and reduce thermal effects.
  • the first adhesive of the present application is not only used to adhere lithium iron phosphate to the aluminum foil, but can also form a good bonding effect with the electrode material through van der Waals force, so that the electrode material can better adhere to the current collector. To further reduce the interfacial resistance between the electrode material and the current collector. In addition, it can also improve the uniformity and dispersion stability of the battery slurry, thereby improving the electrochemical performance of the electrode layer.
  • Figure 1 is a schematic structural diagram of the first current collector of this application.
  • Figure 2 is a schematic structural diagram of the second current collector of the present application.
  • Figure 3 is a schematic structural diagram of the first electrode in which an electrode layer is formed on the first current collector in this application;
  • Figure 4 is a schematic structural diagram of the second electrode in which an electrode layer is formed on the second current collector in this application;
  • Figure 5 is a schematic structural diagram of a third electrode in which an electrode layer is formed on the first current collector in this application.
  • Aluminum foil is currently the most important cathode current collector of lithium batteries. It has good conductivity, light weight and low cost.
  • the passivation layer on its surface can avoid corrosion of the electrolyte during the charging and discharging process.
  • the contact area between the rigid aluminum foil and the positive electrode active material is limited, resulting in a large interface resistance between the active material and the current collector.
  • the electrode volume continues to change during the long-term cycle charge and discharge process, and the bonding between the particles of the electrode material is loose and the powder is easy to fall off. Battery capacity and cycle life decay rapidly.
  • lithium nickel cobalt manganate material Compared with other lithium battery electrode materials lithium manganate and lithium iron phosphate, lithium nickel cobalt manganate material has poor thermal stability and is easily decomposed at high temperatures. Therefore, ternary lithium batteries using lithium nickel cobalt manganate as electrode materials are safer. Low.
  • this application provides a highly safe ternary lithium battery current collector, including an aluminum foil 1 and a safe conductive coating 2.
  • the safe conductive coating 2 of the present application is made of conductive slurry, and the conductive slurry is coated on the aluminum foil 1 to form the safe conductive coating 2 of the present application.
  • the conductive paste of the present application is coated on one or both sides of the aluminum foil 1 .
  • the conductive paste of the present application includes the following mass percentage components: 50% to 60% lithium iron phosphate and 40% to 50% first binder.
  • lithium iron phosphate As one of the electrode materials, lithium iron phosphate has the characteristics of high thermal stability, low electrolyte oxidation capacity, and high safety. However, it also has low conductivity, excessive volume, large amount of electrolyte, and poor battery consistency. Poor disadvantages.
  • This application uses lithium iron phosphate as the main component of the safety conductive coating, and mixes it with the first binder to form a conductive slurry and coats it on the aluminum foil, which has the following effects: (1) Improves the performance of the electrode material (nickel cobalt manganese oxide) The adhesion between lithium) and aluminum foil reduces the interfacial resistance between the electrode material and the aluminum foil and increases the impedance, thus improving the safety of lithium batteries; (2) Lithium iron phosphate helps to improve the stability of the electrode material structure, Reduce the internal resistance of the electrode material, thereby improving the safety of lithium batteries; (3) Reduce polarization, improve the rate performance of lithium batteries, and reduce thermal effects.
  • the lithium iron phosphate in this application is not used as an electrode material, but as a coating component of a current collector.
  • the final electrode material is coated on a safe conductive coating containing lithium iron phosphate.
  • the electrode layer coated on the safety conductive coating is generally made of electrode slurry, and the electrode slurry is generally composed of electrode materials and adhesives.
  • the adhesives currently used in electrode slurries are mainly Polyvinylidene fluoride (PVDF) adhesive. Since polyvinylidene fluoride is a semi-crystalline polymer with a relatively high degree of crystallinity and a high crystal melting temperature, the crystallinity of PVDF makes it difficult for molecules in the electrolytic liquid to circulate at the normal operating temperature of the battery, and the charge and discharge load increases. big. In addition, PVDF homopolymer also has various problems.
  • the binder in the conductive paste is called the second binder.
  • the second adhesive is preferably a PVDF adhesive.
  • the first adhesive of the present application and the second adhesive in the electrode slurry have good binding force, so that the difference in shrinkage between the first adhesive and the second adhesive is reduced to Reduce the probability of the electrode layer detaching from the current collector.
  • the first adhesive in this application is one or more of acrylic water-based adhesive, polystyrene adhesive, and aziridine cross-linking agent.
  • the first adhesive of this application is not only used to adhere lithium iron phosphate to aluminum foil, but can also form a good bonding effect with the electrode material through van der Waals force, so that the electrode material can better adhere to the current collector to further Reduce the interfacial resistance between the electrode material and the current collector. In addition, it can also improve the uniformity and dispersion stability of the battery slurry, thereby improving the electrochemical performance of the electrode layer.
  • the relative molecular weight of the first adhesive in the present application is 40,000 to 100,000. It should be noted that the relative molecular weight of the first adhesive of the present application has an important influence on the adhesion between the safety conductive coating and the aluminum foil and electrode layer. According to a large number of experiments and studies in the application, it was found that the first binder with a relative molecular weight of 40,000 to 100,000 can effectively reduce the probability of electrode layer detachment when used in a smaller amount.
  • the relative molecular weight of the first adhesive is too large, it will not only affect the uniformity of the safety conductive coating, but also the uniformity of the electrode layer; if the relative molecular weight of the first adhesive is too small, it will affect the safety conductive coating and the uniformity of the electrode layer. Adhesion between aluminum foil and electrode layer.
  • the mass ratio of lithium iron phosphate and the first binder in the conductive slurry of the present application is (53-57): (43-47).
  • the first adhesive of the present application is acrylic resin. More preferably, the first adhesive of the present application is an acrylic resin containing trifunctional acrylimine aziridine, wherein the mass of the trifunctional acrylimine aziridine is 1% to 5% of the mass of the acrylic resin.
  • the aziridine segment functional group of the trifunctional acrylimine aziridine of the present application can cross-link with the active hydrogen of water-based polyacrylate emulsion, water-based polyurethane dispersion, alcohol-soluble resin and solvent-based resin at normal temperature. Therefore, The adhesion of the safe conductive coating to the aluminum foil and electrode layers can be further improved.
  • the thickness of the safety conductive coating when the battery volume remains unchanged, if the thickness of the safety conductive coating is too large, the thickness of the electrode layer will be reduced accordingly, thereby reducing the battery capacity; if the thickness of the safety conductive coating is too small, it will not Effectively improve the impedance between the electrode layer and the current collector.
  • the thickness of the safety conductive coating of the present application is 2 to 8 ⁇ m.
  • the thickness of the aluminum foil of the present application is 10 to 20 ⁇ m, but is not limited thereto.
  • this application also provides a lithium battery electrode, including the above-mentioned current collector and electrode layer 3.
  • the current collector includes aluminum foil 1 and safety conductive coating 2.
  • the electrode layer 3 of the present application is made of electrode slurry.
  • the electrode slurry is coated on the safety conductive coating 2 to form the electrode layer 3 .
  • the electrode slurry includes lithium nickel cobalt manganate and a second binder.
  • the second adhesive of the present application is a polyvinylidene fluoride adhesive.
  • the second adhesive can also be vinyl fluoride (PTFE), styrene-butadiene rubber (SBR), fluorinated rubber, polyelectrolyte polymer, polyacrylic acid (PAA), polyvinyl alcohol (PVA) ), one or more of sodium carboxymethylcellulose (CMC).
  • PTFE vinyl fluoride
  • SBR styrene-butadiene rubber
  • PAA polyacrylic acid
  • PVA polyvinyl alcohol
  • CMC sodium carboxymethylcellulose
  • the electrode layer of the present application may have a single-layer structure, or a double-layer or multi-layer structure.
  • the electrode layer of the present application includes a first electrode layer 31 coated on the safety conductive coating 2 and a second electrode layer 32 coated on the first electrode layer 31.
  • the first electrode layer 31 is composed of The first electrode slurry is made, and the second electrode layer 32 is made of the second electrode slurry.
  • the first electrode slurry includes lithium nickel cobalt manganate and a second binder. Different from the first conductive slurry, the lithium nickel cobalt manganate in the second conductive slurry is replaced by one of lithium cobalt oxide, lithium manganate, lithium nickel cobalt oxide, lithium nickel cobalt aluminum oxide, and lithium iron phosphate.
  • this application also provides a lithium battery, including the above-mentioned current collector.
  • a layer of safety conductive coating is coated on the aluminum foil, and then the electrode slurry is coated on the safety conductive coating, which can improve the safety of lithium batteries.
  • the lithium iron phosphate in the safe conductive coating of this application is also a ternary electrode material, it not only takes into account the electrochemical properties of different electrode materials, but also can complement each other through the safety of multiple electrode materials, thereby achieving safety. maximize.
  • An electrode including aluminum foil, a safety conductive coating coated on the front and back sides of the aluminum foil, and an electrode layer coated on the safety conductive coating; wherein the thickness of the aluminum foil is 15 ⁇ m, and the safety conductive coating is made of conductive slurry into, with a thickness of 2 ⁇ m, and the electrode layer is made of electrode slurry, with a thickness of 150 ⁇ m;
  • the conductive slurry is composed of 50% mass fraction of lithium iron phosphate and 50% of an acrylic adhesive with a relative molecular weight of 40,000.
  • the electrode slurry is composed of 95% mass fraction of lithium nickel cobalt manganate and 5% PVDF adhesive. composition.
  • An electrode including aluminum foil, a safety conductive coating coated on the front and back sides of the aluminum foil, and an electrode layer coated on the safety conductive coating; wherein the thickness of the aluminum foil is 15 ⁇ m, and the safety conductive coating is made of conductive slurry into, with a thickness of 4 ⁇ m, and the electrode layer is made of electrode slurry, with a thickness of 160 ⁇ m;
  • the conductive slurry is composed of 53% mass fraction of lithium iron phosphate and 47% of an acrylic adhesive with a relative molecular weight of 60,000.
  • the electrode slurry is composed of 95% mass fraction of lithium nickel cobalt manganate and 5% PVDF adhesive. composition.
  • An electrode including aluminum foil, a safety conductive coating coated on the front and back sides of the aluminum foil, and an electrode layer coated on the safety conductive coating; wherein the thickness of the aluminum foil is 15 ⁇ m, and the safety conductive coating is made of conductive slurry into, with a thickness of 6 ⁇ m, and the electrode layer is made of electrode slurry, with a thickness of 170 ⁇ m;
  • the conductive slurry is composed of 55% mass fraction of lithium iron phosphate and 45% of an acrylic adhesive with a relative molecular weight of 80,000.
  • the electrode slurry is composed of 95% mass fraction of lithium nickel cobalt manganate and 5% PVDF adhesive. composition.
  • An electrode including aluminum foil, a safety conductive coating coated on the front and back sides of the aluminum foil, and an electrode layer coated on the safety conductive coating; wherein the thickness of the aluminum foil is 15 ⁇ m, and the safety conductive coating is made of conductive slurry into, with a thickness of 8 ⁇ m, and the electrode layer is made of electrode slurry, with a thickness of 180 ⁇ m;
  • the conductive slurry is composed of 60% mass fraction of lithium iron phosphate and 40% of an acrylic adhesive with a relative molecular weight of 100,000.
  • the electrode slurry is composed of 95% mass fraction of lithium nickel cobalt manganate and 5% PVDF adhesive. composition.
  • the thickness of the safe conductive coating in Example 5 is 1 ⁇ m.
  • the conductive paste of Example 6 is composed of lithium iron phosphate with a mass fraction of 55% and a first binder with a mass fraction of 45%.
  • the first binder is composed of trifunctional propylene imine aziridine. It is composed of an acrylic adhesive with a relative molecular weight of 80,000, and the mass of the trifunctional acrylimine aziridine is 1% of the mass of the acrylic resin.
  • the conductive paste of Example 7 is composed of lithium iron phosphate with a mass fraction of 55% and a first binder with a mass fraction of 45%.
  • the first binder is composed of trifunctional propylene imine aziridine. It is composed of an acrylic adhesive with a relative molecular weight of 80,000, and the mass of the trifunctional acrylimine aziridine is 5% of the mass of the acrylic resin.
  • the electrode layer of Embodiment 10 includes a first electrode layer and a second electrode layer.
  • the thickness of the first electrode layer is 100 ⁇ m, and the thickness of the second electrode layer is 70 ⁇ m.
  • the first electrode layer is composed of the first electrode layer and the second electrode layer.
  • Made of electrode slurry, the second electrode layer is made of the second electrode slurry;
  • the first electrode slurry consists of lithium nickel cobalt manganate with a mass fraction of 95% and 5% PVDF binder;
  • the second electrode slurry consists of 95% lithium iron phosphate and 5% PVDF binder.
  • An electrode including an aluminum foil and an electrode layer coated on the front and back sides of the aluminum foil; wherein, the thickness of the aluminum foil is 15 ⁇ m, and the electrode layer is made of electrode slurry, with a thickness of 150 ⁇ m; the electrode slurry is made of nickel with a mass fraction of 95% Composed of lithium cobalt manganate and 5% PVDF binder.
  • the conductive slurry of Comparative Example 2 is composed of lithium iron phosphate with a mass fraction of 55% and PVDF binder with a mass fraction of 45%.
  • the conductive paste of Comparative Example 3 is composed of 70% lithium iron phosphate and 30% acrylic adhesive with a relative molecular weight of 80,000.
  • An electrode including aluminum foil and electrode layers coated on the front and back sides of the aluminum foil; wherein the thickness of the aluminum foil is 15 ⁇ m, the electrode layer includes a first electrode layer and a second electrode layer, the thickness of the first electrode layer is 100 ⁇ m, and the thickness of the second electrode layer is 100 ⁇ m.
  • the thickness of the electrode layer is 70 ⁇ m, the first electrode layer is made of the first electrode slurry, and the second electrode layer is made of the second electrode slurry;
  • the first electrode slurry consists of lithium nickel cobalt manganate with a mass fraction of 95% and 5% PVDF binder;
  • the second electrode slurry consists of 95% lithium iron phosphate and 5% PVDF binder.

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
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Abstract

La présente invention concerne un collecteur de courant de batterie au lithium ternaire à haute sécurité, une électrode et une batterie au lithium. Le collecteur de courant comprend une feuille d'aluminium et un revêtement conducteur sûr, le revêtement conducteur sûr étant préparé à partir d'une bouillie conductrice, et la bouillie conductrice comprenant les composants suivants en pourcentages en masse : 50 à 60 % de phosphate de fer et de lithium, et 40 à 50 % d'un premier liant. Une bouillie d'électrode est revêtue sur le revêtement conducteur sûr pour former une couche d'électrode ; la bouillie d'électrode comprend un matériau d'électrode et un second liant ; et le matériau d'électrode comprend au moins de l'oxyde de lithium-nickel-cobalt-manganèse. Le collecteur de courant de la présente invention peut améliorer la sécurité d'une batterie au lithium ternaire et réduire la zone de détachement d'une couche d'électrode.
PCT/CN2022/118303 2022-03-29 2022-09-13 Collecteur de courant de batterie au lithium ternaire à haute sécurité, électrode et batterie au lithium WO2023184878A1 (fr)

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CN202210323671.6 2022-03-29
CN202210323671.6A CN114744206A (zh) 2022-03-29 2022-03-29 一种高安全性的三元锂电池集流体、电极、锂电池

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CN114744206A (zh) * 2022-03-29 2022-07-12 佛山市中技烯米新材料有限公司 一种高安全性的三元锂电池集流体、电极、锂电池
WO2024077473A1 (fr) * 2022-10-11 2024-04-18 宁德时代新能源科技股份有限公司 Collecteur de courant et son procédé de fabrication, et plaque d'électrode, batterie secondaire et appareil électrique

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103165863A (zh) * 2012-12-07 2013-06-19 深圳市海太阳实业有限公司 一种正极极片及其制备方法、电池
JP2016149189A (ja) * 2015-02-10 2016-08-18 日立化成株式会社 リチウムイオン二次電池
CN106663811A (zh) * 2014-07-11 2017-05-10 株式会社Lg 化学 正极及其制造方法
CN108203482A (zh) * 2018-01-02 2018-06-26 珠海光宇电池有限公司 负极粘结剂及其制备方法和负极极片的制备方法
CN111200159A (zh) * 2018-11-16 2020-05-26 宁德时代新能源科技股份有限公司 一种电池
CN111200131A (zh) * 2018-11-16 2020-05-26 宁德时代新能源科技股份有限公司 一种正极极片及电化学装置
CN111200101A (zh) * 2018-11-16 2020-05-26 宁德时代新能源科技股份有限公司 一种正极极片及电化学装置
CN114744206A (zh) * 2022-03-29 2022-07-12 佛山市中技烯米新材料有限公司 一种高安全性的三元锂电池集流体、电极、锂电池

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111200132B (zh) * 2018-11-16 2021-05-18 宁德时代新能源科技股份有限公司 一种电池
CN113380979B (zh) * 2020-03-10 2023-01-10 荣盛盟固利新能源科技有限公司 一种锂离子电池

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103165863A (zh) * 2012-12-07 2013-06-19 深圳市海太阳实业有限公司 一种正极极片及其制备方法、电池
CN106663811A (zh) * 2014-07-11 2017-05-10 株式会社Lg 化学 正极及其制造方法
JP2016149189A (ja) * 2015-02-10 2016-08-18 日立化成株式会社 リチウムイオン二次電池
CN108203482A (zh) * 2018-01-02 2018-06-26 珠海光宇电池有限公司 负极粘结剂及其制备方法和负极极片的制备方法
CN111200159A (zh) * 2018-11-16 2020-05-26 宁德时代新能源科技股份有限公司 一种电池
CN111200131A (zh) * 2018-11-16 2020-05-26 宁德时代新能源科技股份有限公司 一种正极极片及电化学装置
CN111200101A (zh) * 2018-11-16 2020-05-26 宁德时代新能源科技股份有限公司 一种正极极片及电化学装置
CN114744206A (zh) * 2022-03-29 2022-07-12 佛山市中技烯米新材料有限公司 一种高安全性的三元锂电池集流体、电极、锂电池

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