WO2020080887A1 - Anode pour batterie secondaire au lithium, batterie secondaire au lithium la comprenant, et procédé de fabrication associé - Google Patents

Anode pour batterie secondaire au lithium, batterie secondaire au lithium la comprenant, et procédé de fabrication associé Download PDF

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Publication number
WO2020080887A1
WO2020080887A1 PCT/KR2019/013757 KR2019013757W WO2020080887A1 WO 2020080887 A1 WO2020080887 A1 WO 2020080887A1 KR 2019013757 W KR2019013757 W KR 2019013757W WO 2020080887 A1 WO2020080887 A1 WO 2020080887A1
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negative electrode
active material
secondary battery
electrode active
lithium secondary
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PCT/KR2019/013757
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English (en)
Korean (ko)
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홍연숙
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주식회사 엘지화학
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • 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
    • H01M4/04—Processes of manufacture in general
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/0438—Processes of manufacture in general by electrochemical processing
    • H01M4/0459—Electrochemical doping, intercalation, occlusion or alloying
    • 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
    • H01M4/13—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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/133—Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • 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
    • H01M4/139—Processes of manufacture
    • 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
    • H01M4/139—Processes of manufacture
    • H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H01M4/364—Composites as mixtures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • 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
    • 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

Definitions

  • the present invention provides a lithium secondary battery negative electrode, a pre-lithiated negative electrode, a method for manufacturing a pre-lithiated negative electrode, a lithium secondary battery including a pre-lithiated negative electrode and a lithium secondary battery that can more effectively perform pre-lithiation. It relates to a manufacturing method.
  • a metal oxide such as LiCoO 2 , LiMnO 2 , LiMn 2 O 4 or LiCrO 2 is used as a positive electrode active material constituting a positive electrode of a lithium secondary battery
  • metal lithium, graphite as a negative electrode active material constituting the negative electrode
  • Carbon-based materials such as (graphite) or activated carbon, or materials such as silicon oxide (SiO x ) are used.
  • metal lithium was mainly used initially, but as charging and discharging cycles progress, lithium atoms grow on the surface of the metal lithium to damage the separator and damage the battery. Recently, carbon-based materials are mainly used.
  • charging and discharging proceeds while repeating the process in which lithium ions of the positive electrode active material of the positive electrode are intercalated and deintercalated as the negative electrode active material of the negative electrode.
  • the lithium insertion and desorption reactions into the negative electrode active material layer are completely reversible, but in practice, more lithium is consumed than the theoretical capacity of the negative electrode active material, and only a portion of them are recovered during discharge. Therefore, after the second cycle, a smaller amount of lithium ions is inserted during charging, but during discharge, most of the inserted lithium ions are released.
  • the difference in capacity shown in the first charging and discharging reaction is referred to as irreversible capacity loss.
  • lithium ions are supplied from the positive electrode and are prepared without lithium in the negative electrode. It is important to minimize losses.
  • pre-lithiation is performed before the production of the lithium secondary battery to pre-react side reactions that occur during the first charging. And how to go through it.
  • the first cycle proceeds in a state in which irreversible is reduced, so that initial irreversible may be reduced.
  • An object of the present invention is a lithium secondary battery negative electrode capable of more effectively performing pre-lithiation, a pre-lithiated negative electrode, a method of manufacturing a pre-lithiated negative electrode, a lithium secondary battery including a pre-lithiated negative electrode and the lithium secondary It is intended to provide a method for manufacturing a battery.
  • It provides a negative electrode for a lithium secondary battery comprising a; hydrophobic coating layer formed on the surface of the lithium metal layer.
  • the present invention also relates to the present invention.
  • An anode for a lithium-ionized lithium secondary battery in which lithium metal ions are diffused in the anode active material layer is provided.
  • the method for manufacturing the pre-lithiated cathode according to one embodiment of the present invention is performed through the following steps (see FIG. 3):
  • the negative electrode active material may be included in an amount of 80 to 99% by weight, more specifically 85 to 98% by weight based on the total weight of the negative electrode active material layer. When included in the above-mentioned content range, it can exhibit excellent capacity characteristics.
  • the pre-lithiation may be carried out by impregnating the electrolyte with a lithium metal layer in an electrolyte solution at a temperature of 10 ° C to 100 ° C for 2 hours to 48 hours, preferably at a temperature of 20 ° C to 45 ° C for 13 hours to 36 hours. .
  • pre-lithiation temperature and time is less than 10 ° C and less than 2 hours, pre-lithiation may not be sufficiently achieved, and at temperatures exceeding 100 ° C, electrolytic solution is vaporized, and pre-lithiation is difficult to achieve. Since it is made, there is no need to impregnate the cathode.
  • the electrolyte solution is a solution containing an ionizable lithium salt and an organic solvent.
  • the ionizable lithium salt comprises a Li + as the cation, and the anion is F -, Cl -, Br - , I -, NO 3 -, N (CN) 2 -, BF 4 -, ClO 4 -, AlO 4 -, AlCl 4 -, PF 6 -, SbF 6 -, AsF 6 -, B 10 Cl 10 -, BF 2 C 2 O 4 -, BC 4 O 8 -, PF 4 C 2 O 4 -, PF 2 C 4 O 8 -, (CF 3) 2 PF 4 -, (CF 3) 3 PF 3 -, (CF 3) 4 PF 2 -, (CF 3) 5 PF -, (CF 3) 6 P -, CF 3 SO 3 -, C 4 F 9 SO 3 -, CF 3 CF 2 SO 3 -, (CF 3 SO 2) 2 N -, (FSO 2) 2 N -, CF 3 CF 2 (CF 3) 2 CO
  • the organic solvent is ethylene carbonate, 1,2-butylene carbonate, 2,3-butylene carbonate, 1,2-pentylene carbonate, 2,3-pentylene carbonate, vinylene carbonate and fluoroethylene carbonate (FEC) Cyclic carbonate-based organic solvent selected from the group consisting of; A linear carbonate-based organic solvent selected from the group consisting of dimethyl carbonate, diethyl carbonate, dipropyl carbonate, ethylmethyl carbonate, methylpropyl carbonate and ethylpropyl carbonate; One or more selected from linear ester-based organic solvents selected from the group consisting of methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, and butyl propionate can be used.
  • a linear carbonate-based organic solvent selected from the group consisting of dimethyl carbonate, diethyl carbonate, dipropyl carbonate, eth
  • Such a lithium secondary battery may be prepared by pre-lithiating the negative electrode by impregnating the negative electrode with an electrolyte before assembling the electrode assembly in the same manner as described above, and using the pre-lithiated negative electrode.
  • the cathode may be pre-lithiated by the electrolyte.
  • the method of manufacturing a lithium secondary battery to fully lithium an anode after battery assembly is performed through the following steps:
  • Step of inserting the electrode assembly into the battery container and injecting an electrolyte S36.
  • a method for manufacturing a lithium secondary battery for pre-lithiating a negative electrode after battery assembly is performed through the following steps:
  • Step of inserting the electrode assembly into the battery container and injecting an electrolyte (S44).
  • the electrode assembly is impregnated with the electrolyte solution at a temperature of 10 ° C to 100 ° C for 2 hours to 48 hours, preferably at a temperature of 20 ° C to 45 ° C for 13 hours to By allowing to stand for 36 hours, it is possible to fully lithify the negative electrode in the battery.
  • the lithium secondary battery according to the present invention includes a negative electrode, an anode positioned opposite to the negative electrode, an electrode assembly including an electrode interposed between the negative electrode and the positive electrode, and an electrolyte, wherein the negative electrode is the present invention described above. It is a cathode prepared accordingly.
  • the secondary battery may further include a battery container for storing the electrode assembly of the positive electrode, the negative electrode, the separator, and a sealing member for sealing the battery container.
  • the positive electrode includes a positive electrode current collector and a positive electrode active material layer positioned on at least one surface of the positive electrode current collector.
  • the positive electrode may be prepared according to a conventional positive electrode manufacturing method generally known in the art.
  • the positive electrode is prepared by dissolving or dispersing the components constituting the positive electrode active material layer, that is, the positive electrode active material, a conductive material and / or a binder, in a solvent to prepare a positive electrode mixture, and the positive electrode mixture of the positive electrode current collector. After coating on at least one surface, it may be prepared by drying or pressing, or by casting the positive electrode mixture on a separate support and then laminating the film obtained by peeling from the support on the positive electrode current collector.
  • the positive electrode current collector is not particularly limited as long as it does not cause a chemical change in the battery and has conductivity.
  • stainless steel, aluminum, nickel, titanium, calcined carbon, or carbon, nickel, titanium on aluminum or stainless steel surfaces , Surface treatment with silver or the like can be used.
  • the positive electrode current collector may have a thickness of usually 3 ⁇ m to 500 ⁇ m, and may form fine irregularities on the surface of the current collector to increase the adhesion of the positive electrode active material.
  • it can be used in various forms such as films, sheets, foils, nets, porous bodies, foams, and nonwoven fabrics.
  • the binder and the conductive material may be the same as described above in the negative electrode.
  • a conventional porous non-woven fabric for example, a high-melting point glass fiber, non-woven fabric made of polyethylene terephthalate fiber or the like may be used.
  • a coated separator containing a ceramic component or a polymer material may be used to secure heat resistance or mechanical strength, and may be used in a single-layer or multi-layer structure.
  • the electrolyte solution may be the same as described in the electrolyte solution used in the manufacture of the negative electrode.
  • SiO (D50: 3.2 ⁇ m) and artificial graphite were mixed at a weight ratio of 3: 7 and used as a negative electrode active material.
  • the negative electrode active material, SBR binder, CMC and acetylene black were added to water in a weight ratio of 93: 3: 1.5: 2.5 to prepare a negative electrode slurry.
  • the slurry was uniformly coated on a 10 ⁇ m copper foil, the drying temperature was 90 ° C., and the coating speed was 0.2 m / min.
  • the coated electrode was rolled according to the porosity of 30% to match the target thickness. It was then dried in a vacuum oven at 180 ° C for 12 hours.
  • a polytetrafluoroethylene solution is coated in a release film (PET) by a dip coating method, and then a lithium metal layer is formed by transferring 10 ⁇ m lithium foil on the upper portion, and then the lithium metal layer of the structure is the negative electrode active material layer.
  • Laminates were prepared to be in contact with each other, and then the release film was removed to prepare a negative electrode having a hydrophobic coating layer.
  • the secondary battery was manufactured in the same manner as in Example 1.
  • a cathode and a secondary battery were prepared in the same manner as in Example 1, except that the hydrophobic coating layer was not formed.
  • the 2032-sized coin half cells prepared in Examples 1 and 2 and Comparative Example 1 were first charged with an upper limit of 1 V at a current density of 0.6 mA / cm2, 0.005 V at a constant current of 0.6 mA / cm2 and a constant current of 0.005 V Upon arrival, the first discharge was performed with 30 A / cm 2 rectification limitation. Next, the capacity obtained through the secondary charging process with 1 V as the upper limit at a current density of 0.6 mA / cm 2 was measured for the total lithiation capacity through Equation 1 below, and the results are shown in Table 1.
  • the primary discharge capacity and the secondary charge capacity before pre-lithiation are performed for 20 hours at 25 ° C. after pre-lithiation in Examples 1, 2 and Comparative Example 1, that is, after injection of the electrolyte solution.
  • This is the capacity obtained by performing primary charging, primary discharging, and secondary charging under the same conditions as described above before leaving to stand.
  • Pre-lithiation capacity primary charge capacity + (primary discharge capacity-secondary charge capacity)-(primary discharge capacity before pre-lithiation-secondary charge capacity before pre-lithiation)

Abstract

La présente invention concerne une anode pour une batterie secondaire au lithium pouvant effectuer une pré-lithiation plus efficacement, une anode pré-lithiée, un procédé de fabrication d'une anode pré-lithiée, une batterie secondaire au lithium comprenant une anode pré-lithiée, et un procédé de fabrication de cette batterie secondaire au lithium. L'anode pour une batterie secondaire au lithium de la présente invention comprend une couche de revêtement hydrophobe sur la partie supérieure d'une couche métallique de lithium formée sur la surface d'un matériau actif d'anode pour la pré-lithiation, et peut ainsi réduire au minimum le contact avec l'humidité après que la couche de métal de lithium a été formée, pendant une période de stockage jusqu'à ce qu'un électrolyte soit injecté, et peut éviter une perte de lithium.
PCT/KR2019/013757 2018-10-18 2019-10-18 Anode pour batterie secondaire au lithium, batterie secondaire au lithium la comprenant, et procédé de fabrication associé WO2020080887A1 (fr)

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KR10-2018-0124162 2018-10-18
KR1020180124162A KR20200044231A (ko) 2018-10-18 2018-10-18 리튬 이차전지용 음극, 이를 포함하는 리튬 이차전지 및 그의 제조방법

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
CN112820863A (zh) * 2020-12-31 2021-05-18 宁波杉杉新材料科技有限公司 改性预锂化硅氧材料、制备方法、应用和锂离子电池
CN113707848A (zh) * 2021-08-16 2021-11-26 电子科技大学 一种全氟硅烷偶联剂修饰的Li负极制备方法
CN114792848A (zh) * 2021-01-25 2022-07-26 上海汉行科技有限公司 一种可连续补锂/钠的蓄电池
CN116040654A (zh) * 2022-12-13 2023-05-02 深圳华钠新材有限责任公司 一种超疏水普鲁士蓝材料及其制备方法和应用
WO2023123025A1 (fr) * 2021-12-29 2023-07-06 宁德新能源科技有限公司 Dispositif électrochimique et dispositif électronique
CN116979018A (zh) * 2023-09-22 2023-10-31 宁德时代新能源科技股份有限公司 改性极片、其制备方法、二次电池和用电装置
DE102022204573A1 (de) 2022-05-10 2023-11-16 Volkswagen Aktiengesellschaft Verfahren zur Herstellung einer Kathodenbeschichtung

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JP2013020974A (ja) * 2006-03-09 2013-01-31 Panasonic Corp 転写用フィルムの製造方法、および電気化学素子用の極板の製造方法
JP2012151395A (ja) * 2011-01-21 2012-08-09 Fuji Heavy Ind Ltd 蓄電デバイス
KR20150014676A (ko) * 2013-07-30 2015-02-09 주식회사 엘지화학 음극 전극의 전리튬화 방법
KR20160033608A (ko) * 2014-09-18 2016-03-28 주식회사 엘지화학 애노드, 이를 포함하는 리튬 이차 전지, 상기 리튬 이차 전지를 포함하는 전지 모듈 및 애노드의 제조방법
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112820863A (zh) * 2020-12-31 2021-05-18 宁波杉杉新材料科技有限公司 改性预锂化硅氧材料、制备方法、应用和锂离子电池
CN112820863B (zh) * 2020-12-31 2022-02-08 宁波杉杉新材料科技有限公司 改性预锂化硅氧材料、制备方法、应用和锂离子电池
CN114792848A (zh) * 2021-01-25 2022-07-26 上海汉行科技有限公司 一种可连续补锂/钠的蓄电池
CN113707848A (zh) * 2021-08-16 2021-11-26 电子科技大学 一种全氟硅烷偶联剂修饰的Li负极制备方法
WO2023123025A1 (fr) * 2021-12-29 2023-07-06 宁德新能源科技有限公司 Dispositif électrochimique et dispositif électronique
DE102022204573A1 (de) 2022-05-10 2023-11-16 Volkswagen Aktiengesellschaft Verfahren zur Herstellung einer Kathodenbeschichtung
CN116040654A (zh) * 2022-12-13 2023-05-02 深圳华钠新材有限责任公司 一种超疏水普鲁士蓝材料及其制备方法和应用
CN116979018A (zh) * 2023-09-22 2023-10-31 宁德时代新能源科技股份有限公司 改性极片、其制备方法、二次电池和用电装置

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