WO2022237534A1 - Adhésif composite, son procédé de préparation et son application - Google Patents

Adhésif composite, son procédé de préparation et son application Download PDF

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WO2022237534A1
WO2022237534A1 PCT/CN2022/089437 CN2022089437W WO2022237534A1 WO 2022237534 A1 WO2022237534 A1 WO 2022237534A1 CN 2022089437 W CN2022089437 W CN 2022089437W WO 2022237534 A1 WO2022237534 A1 WO 2022237534A1
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negative electrode
binder
composite binder
active material
electrode sheet
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PCT/CN2022/089437
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English (en)
Chinese (zh)
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刘颖
支岩辉
姚洋洋
窦洋
娄帅宾
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蜂巢能源科技股份有限公司
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Publication of WO2022237534A1 publication Critical patent/WO2022237534A1/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
    • H01M4/62—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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0404—Methods of deposition of the material by coating on electrode collectors
    • 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
    • H01M4/1391—Processes of manufacture of 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
    • H01M4/139—Processes of manufacture
    • H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the disclosure relates to the technical field of lithium-ion batteries, and relates to a composite binder and a preparation method and application thereof.
  • silicon-oxygen materials SiOx, where 0 ⁇ x ⁇ 2
  • SiOx silicon-oxygen materials
  • Density provides ideas; however, the dynamic performance of silicon-oxygen materials is significantly worse in low-temperature environments, so adding a small amount of silicon-oxygen materials will also make the low-temperature performance of the battery worse, and lithium will be precipitated during low-temperature cycling.
  • described composite binder comprises rubber, nitrile compound and dispersant, and the mass ratio of described rubber and nitrile compound is 1:2-1:10 ; In the composite binder, the mass fraction of the dispersant is 8-10%.
  • the mass ratio of the rubber to the nitrile compound can be 1:2, 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9 or 1: 10 etc.
  • the mass fraction of the dispersant is, for example, 8%, 8.2%, 8.4%, 8.6%, 8.8%, 9%, 9.2%, 9.4%, 9.6%, 9.8% or 10%.
  • Rubber such as styrene-butadiene rubber
  • Rubber lacks enough functional groups on the surface, and the interaction force between the active material, the conductive agent and the current collector is poor, and in the silicon-oxygen system, the expansion of the pole piece is large, and pure rubber is used as the The binding force of the binder to the pole piece is weak, and the binding effect is significantly reduced in the later stage of the cycle, causing the active material to fall off and affecting the cycle life of the battery cell.
  • Nitrile compounds (such as acrylonitrile copolymers) contain cyano groups, have a strong binding ability to the pole piece, and have low self-impedance, especially in low temperature environments.
  • the binder by mixing the flexible binder and the rigid binder, it is ensured that the binder has sufficient binding effect during the expansion of silicon-oxygen to ensure that the active material does not fall off, and at the same time It also avoids the problem of easy cracking during processing caused by the rigidity of the pole piece when purely using a rigid binder; at the same time, it improves the charging capacity of the silicon-oxygen system in a low-temperature environment, ensuring that the system does not precipitate lithium in a low-temperature environment .
  • the dispersant with a mass fraction of 8-10% plays a thickening and dispersing role in the homogenization process, and can disperse the solid particles of the negative electrode, so that the slurry can maintain a relatively stable state during use. If the amount of dispersant added is too low, it will easily lead to sedimentation during the use of the slurry, which will affect the processing of the pole piece. If the amount of dispersant added is too high, it will increase the impedance of the pole piece itself, and using too much dispersant will reduce the active material content of the main material and affect the energy density of the cell.
  • the proportion of rubber is high, the flexibility of the battery cell is better, but the binding force on the expansion of the battery cell is poor.
  • the large expansion of the pole piece leads to the continuous destruction and formation of the SEI film, which not only consumes the active lithium, but also leads to a significant increase in the resistance of the battery cell, resulting in cyclic diving.
  • the proportion of rubber is too high, the low-temperature performance of the battery will deteriorate; if the proportion of nitrile compounds is too high, it will cause the pole pieces of the battery to be brittle and less flexible. Around the position, the active material of the pole piece is easy to fall off, which has an adverse effect on the life of the battery cell.
  • the composite binder is applied to the silicon-oxygen system, which not only maintains the good flexibility of the styrene-butadiene rubber binder pole piece, but also retains the strong ion transport effect of the acrylonitrile copolymer binder , the advantage of low resistance of the binder, while increasing the energy density, the low-temperature cycle of the battery is significantly improved.
  • the mass ratio of the rubber to the nitrile compound is 1:3.5-1:4.5. If the rubber and nitrile compounds are in this range, the composite binder can achieve more excellent effects.
  • the rubber includes styrene-butadiene rubber.
  • the nitrile compound includes acrylonitrile copolymer.
  • the acrylonitrile copolymer may be an LA type binder.
  • the dispersant includes sodium carboxymethylcellulose.
  • the use of sodium carboxymethyl cellulose in combination with rubber and nitrile compounds can better balance the effects of improving battery energy density and low-temperature performance.
  • the present disclosure provides a method for preparing the above-mentioned composite binder, the method comprising the following steps:
  • the rubber, nitrile compound and dispersant are mixed to obtain the composite binder.
  • the present disclosure provides a negative electrode sheet, the negative electrode sheet includes a current collector and a negative electrode coating coated on the current collector, the negative electrode coating includes the above-mentioned composite binder, conductive agent and Negative electrode active material, the negative electrode active material includes silicon-oxygen material.
  • the binder provided by an embodiment of the present disclosure is particularly suitable for negative electrode systems containing silicon-oxygen materials, which can significantly improve the low-temperature cycle of the battery while increasing the energy density.
  • the negative electrode active material includes graphite material and silicon oxide material.
  • the negative electrode active material includes graphite, and at the same time, silicon-oxygen material with high gram capacity is added to increase the energy density of the battery.
  • the chemical formula of the silicon-oxygen material is SiOx (0 ⁇ x ⁇ 2).
  • the silicon-oxygen material is a mixture of carbon-coated SiOx (0 ⁇ x ⁇ 1.2) and carbon-coated SiOx (1.2 ⁇ x ⁇ 2), and the carbon-coated silicon-oxygen material is selected from resin polymers
  • the material and the silicon-oxygen material are obtained through high-temperature carbonization at 1500°C-2200°C, and the thickness of the carbon coating layer is 1-10nm.
  • the resin polymer material is selected from phenolic resin, epoxy resin, urea-formaldehyde resin, or the coated carbon is selected from other polymer materials such as polyacrylonitrile, polyvinyl alcohol, polydopamine, etc. after high-temperature carbonization get.
  • the thickness of the carbon coating layer in the carbon-coated silicon-oxygen material is 1-5 nm.
  • the mass fraction of the silicon-oxygen material in the negative electrode active material is less than 5%, such as 5%, 4% or 3%.
  • silicon-oxygen material exists in the negative-electrode active material, but the mass fraction of silicon-oxygen material cannot be too high, because a higher content of silicon-oxygen material is added, and the cell will There will be a more obvious increase in expansion.
  • the binding force of the binder content in the binder formula to the silicon-oxygen expansion is not enough, which will also cause the battery cell to expand too much in the later stage of the cycle process, resulting in the battery cell cycle diving.
  • the mass fraction of the negative electrode active material is 95-97%, such as 95%, 95.5%, 96%, 96.5% or 97%.
  • the negative electrode sheet can effectively solve the phenomenon of poor low-temperature charging ability caused by adding silicon-oxygen materials when the negative electrode material increases the energy density by using the above-mentioned composite binder.
  • the acrylonitrile copolymer blended with styrene-butadiene rubber not only improves the low-temperature charging ability, but also has the characteristics of both normal temperature cycle and high temperature cycle, and has no obvious deterioration effect on high temperature cycle.
  • the composite binder provided by an embodiment of the present disclosure has a 25°C discharge DCR as low as 11.55m ⁇ , a 25°C charge DCR as low as 11.96m ⁇ , a -20°C discharge DCR as low as 144.96m ⁇ , and a -20°C charge resistance as low as To 376.38m ⁇ , disassembly after 50 cycles at -20°C can keep the interface normal.
  • the conductive agent includes any one or a combination of at least two of conductive carbon black, acetylene black or Ketjen black.
  • the mass fraction of the conductive agent is 0.5-1.5%, such as 0.5%, 0.8%, 1%, 1.2% or 1.5%.
  • the mass fraction of the composite binder is 1.5-4.5%, such as 1.5%, 2%, 2.5%, 3%, 3.5% or 4%.
  • the current collector is copper foil.
  • the present disclosure provides a method for preparing the above-mentioned negative electrode sheet, and the method includes the following steps:
  • the solvent is mixed with the composite binder, the negative electrode active material and the conductive agent to obtain the negative electrode slurry, and the negative electrode slurry is coated on the current collector and dried to obtain the negative electrode sheet.
  • the solvent includes water.
  • the present disclosure provides a lithium-ion battery, the lithium-ion battery includes the above-mentioned negative electrode sheet.
  • Figure 1 is a photo of the full-power disassembly of the negative electrode sheet provided in Example 1 after being prepared into a battery at -20°C and 0.05C for 50 cycles;
  • Figure 2 is a photo of the full-power disassembly after the negative electrode sheet provided in Comparative Example 1 was prepared into a battery at -20°C and 0.05C for 50 cycles;
  • Fig. 3 is a full-power disassembly photo of the negative electrode sheet provided in Comparative Example 2 prepared into a battery at -20°C and 0.05C for 50 cycles;
  • Fig. 4 is the normal temperature 25 °C cycle curve of embodiment 1, comparative example 1 and comparative example 2;
  • Fig. 5 is the high temperature 45°C cycle curves of Example 1, Comparative Example 1 and Comparative Example 2.
  • This embodiment provides a composite binder, which is composed of styrene-butadiene rubber, acrylonitrile copolymer (LA-type binder LA133) and sodium carboxymethyl cellulose.
  • LA-type binder LA133 acrylonitrile copolymer
  • the mass ratio of styrene-butadiene rubber to acrylonitrile copolymer is 6:25
  • the mass fraction of sodium carboxymethyl cellulose in the composite binder is 8.8%.
  • This embodiment also provides a negative electrode sheet, which includes a copper foil current collector and a negative electrode coating coated on the current collector.
  • the negative electrode coating is composed of the composite binder and conductive agent (SP) provided by this embodiment. ) and the negative electrode active material.
  • the negative electrode active material is composed of graphite negative electrode material and silicon-oxygen material, and the mass fraction of silicon-oxygen material in the negative electrode active material is 5%.
  • the mass fraction of the composite binder is 3.4%
  • the mass fraction of the conductive agent is 1%
  • the mass fraction of the negative electrode active material is 95.6%.
  • the compacted density of the negative electrode sheet is 1.60 g/cm 3 .
  • the preparation method of the composite binder provided in this example is as follows: mixing the styrene-butadiene rubber and the acrylonitrile copolymer in the formulated amount, adding sodium carboxymethyl cellulose and continuing mixing to obtain the binder.
  • the preparation method of the negative electrode sheet provided in this example is as follows: mixing water with the composite binder, negative electrode active material and conductive agent in the formulated amount to obtain the negative electrode slurry, coating the negative electrode slurry on the current collector, and drying to obtain The negative electrode sheet.
  • This embodiment provides a composite binder, which is composed of styrene-butadiene rubber, acrylonitrile copolymer (LA-type binder LA133) and sodium carboxymethyl cellulose.
  • LA-type binder LA133 acrylonitrile copolymer
  • the mass ratio of styrene-butadiene rubber to acrylonitrile copolymer is 1:3.5
  • the mass fraction of sodium carboxymethyl cellulose in the composite binder is 8%.
  • This embodiment also provides a negative electrode sheet, which includes a copper foil current collector and a negative electrode coating coated on the current collector.
  • the negative electrode coating is composed of the composite binder and conductive agent (SP) provided by this embodiment. ) and the negative electrode active material.
  • the negative electrode active material is composed of graphite negative electrode material and silicon-oxygen material, and the mass fraction of silicon-oxygen material in the negative electrode active material is 4.8%.
  • the mass fraction of the composite binder is 4%
  • the mass fraction of the conductive agent is 1%
  • the mass fraction of the negative electrode active material is 95%.
  • the compacted density of the negative electrode sheet is 1.60 g/cm 3 .
  • This embodiment provides a composite binder, which is composed of styrene-butadiene rubber, acrylonitrile copolymer (LA-type binder LA133) and sodium carboxymethyl cellulose.
  • LA-type binder LA133 acrylonitrile copolymer
  • the mass ratio of styrene-butadiene rubber to acrylonitrile copolymer is 1:4.5
  • the mass fraction of sodium carboxymethyl cellulose in the composite binder is 10%.
  • This embodiment also provides a negative electrode sheet, which includes a copper foil current collector and a negative electrode coating coated on the current collector.
  • the negative electrode coating is composed of the composite binder and conductive agent (SP) provided by this embodiment. ) and the negative electrode active material.
  • the negative electrode active material is composed of graphite negative electrode material and silicon-oxygen material, and the mass fraction of silicon-oxygen material in the negative electrode active material is 4.9%.
  • the mass fraction of the composite binder is 3%, the mass fraction of the conductive agent is 1.5%, and the mass fraction of the negative electrode active material is 95.5%.
  • the compacted density of the negative electrode sheet is 1.60 g/cm 3 .
  • This embodiment provides a composite binder, which is composed of styrene-butadiene rubber, acrylonitrile copolymer (LA-type binder LA133) and sodium carboxymethyl cellulose.
  • LA-type binder LA133 acrylonitrile copolymer
  • the mass ratio of styrene-butadiene rubber to acrylonitrile copolymer is 1:3.8
  • the mass fraction of sodium carboxymethyl cellulose in the composite binder is 9%.
  • This embodiment also provides a negative electrode sheet, which includes a copper foil current collector and a negative electrode coating coated on the current collector.
  • the negative electrode coating is composed of the composite binder and conductive agent (SP) provided by this embodiment. ) and the negative electrode active material.
  • the negative electrode active material is composed of graphite negative electrode material and silicon-oxygen material, and the mass fraction of silicon-oxygen material in the negative electrode active material is 5.0%.
  • the mass fraction of the composite binder is 3.6%
  • the mass fraction of the conductive agent is 0.8%
  • the mass fraction of the negative electrode active material is 95.6%.
  • the compacted density of the negative electrode sheet is 1.60 g/cm 3 .
  • the difference between the negative electrode sheet provided in this example and the negative electrode sheet provided in Example 1 is that the mass ratio of styrene-butadiene rubber to acrylonitrile copolymer in the composite binder used is 1:2.
  • the only difference between the negative electrode sheet provided in this example and the negative electrode sheet provided in Example 1 is that the mass ratio of styrene-butadiene rubber to acrylonitrile copolymer in the composite binder used is 1:10.
  • This comparative example provides a composite binder, which is composed of styrene-butadiene rubber and sodium carboxymethyl cellulose.
  • the mass fraction of sodium carboxymethylcellulose in the composite binder is 35%.
  • the composite binder provided in this comparative example is the composite binder provided in this comparative example
  • the difference from Example 1 is that in the negative electrode coating, the mass fraction of the composite binder is The mass fraction of the conductive agent is 1%, and the mass fraction of the negative electrode active material is 96.2%.
  • This comparative example provides a composite binder, which is composed of acrylonitrile copolymer (LA type binder LA133) and sodium carboxymethylcellulose.
  • LA type binder LA133 acrylonitrile copolymer
  • the mass fraction of sodium carboxymethylcellulose in the composite binder is 8.8%.
  • Example 1 The difference between the negative electrode sheet provided in this comparative example and Example 1 is only that the composite binder used is the composite binder provided in this comparative example.
  • the positive electrode NCM613 active material, conductive agent and binder are mixed according to the ratio of 96.3%: 2.5%, 1.2%, and then made into a positive electrode slurry, which is coated on an aluminum foil, dried and made into a pole roll, and passed through a die-cut The machine die-cuts the pole roll into a size of 50.2mm*95.6mm to make pole pieces, and laminates the negative pole pieces and separators provided in the examples and comparative examples to make soft-pack batteries.
  • the battery cell is baked, liquid injected, pre-charged and other steps to complete the production of the pouch battery; the above test battery is used to discharge the DC resistance (DCR) at 25 °C, and charge the DC resistance (DCR) at 25 °C ( DCR), -20°C discharge DC resistance (DCR), -20°C charge DC resistance (DCR) test.
  • DCR DC resistance
  • DCR charge DC resistance
  • DCR discharge DC resistance
  • DCR -20°C discharge DC resistance
  • DCR -20°C charge DC resistance
  • test battery for low temperature -20°C, 0.05C cycle for 50 weeks and full power disassembly to observe whether lithium precipitation occurs.
  • Figures 1-3 are photos of different binder formulation test schemes (Example 1, Comparative Example 1, and Comparative Example 2) in the silicon-oxygen system at a low temperature of -20°C and 0.05C cycle for 50 weeks. It can be seen that when the binder is pure styrene-butadiene rubber (comparative example 1), there is obvious lithium precipitation on the surface of the pole piece, and it is more obvious at the four corners of the pole piece, while the LA type water-based binder scheme (comparative example 2) And the blending scheme (embodiment 1) of styrene-butadiene rubber and LA water-based binder, the surface of the pole piece is normal, and there is no lithium phenomenon;
  • Figure 4 and Figure 5 are the normal temperature and high temperature cycle curves of different binder formulation schemes (Example 1 and Comparative Example 1, Comparative Example 2) in the silicon-oxygen system, as can be seen from the cycle curves, wherein the mixed binder scheme (Example 1) between styrene-butadiene rubber and LA-type binder, the cycle trend is basically normal, 1500 cycles at normal temperature, 88% capacity retention, 1260 cycles at high temperature, 82% capacity retention; then in the silicon-oxygen system Among them, styrene-butadiene rubber mixed with LA-type binder can achieve both high-temperature and normal-temperature cycles, improve low-temperature charging capabilities, and ensure that the battery does not decompose lithium during low-temperature cycles.
  • the mixed binder scheme Example 1 between styrene-butadiene rubber and LA-type binder
  • the composite binders provided in Examples 1-4 aim at the silicon-oxygen system, which not only maintains the good flexibility of the styrene-butadiene rubber binder pole piece, but also retains the acrylic
  • the nitrile copolymer binder has a strong effect on ion transmission and has the advantages of low binder impedance. While increasing the energy density, it can significantly improve the low-temperature cycle of the battery. Significantly worsening effect.
  • Example 5 because the proportion of styrene-butadiene rubber is relatively high (at a boundary value), the binder itself has a relatively high resistance during the low-temperature cycle, so it is slightly inferior to Example 1 in terms of low-temperature DCR.
  • Example 6 because the proportion of the acrylonitrile copolymer is relatively high (in the boundary value), it is difficult to process the pole piece of the battery cell, the pole piece is relatively stiff, and the edges are easy to drop and crack.
  • Comparative Example 1 because it does not contain acrylonitrile copolymer, the performance of the battery cell at low temperature is poor, and lithium deposition is more serious in low temperature cycle.
  • Comparative example 2 does not contain styrene-butadiene rubber, resulting in poor flexibility of the pole piece. During the cycle, the corners of the pole piece are prone to material drop, which causes the active material of the pole piece to fall off and affects the cycle life of the battery.

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

La présente divulgation concerne un adhésif composite, son procédé de préparation et son application. L'adhésif composite comprend un caoutchouc, un composé nitrile et un dispersant, et le rapport de masse du caoutchouc au composé nitrile est de 1 : 2 à 1 : 10 ; dans l'adhésif composite, la fraction de masse du dispersant est de 8 à 10 %. L'adhésif composite est particulièrement approprié dans le cadre d'un système silicium-oxygène et peut augmenter la densité d'énergie et améliorer significativement les performances de cycle à basse température d'une batterie.
PCT/CN2022/089437 2021-05-08 2022-04-27 Adhésif composite, son procédé de préparation et son application WO2022237534A1 (fr)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6183907B1 (en) * 1997-08-04 2001-02-06 Alcatel Binder for an electrode of an electrochemical system with a non-aqueous electrolyte
JP2008091192A (ja) * 2006-10-02 2008-04-17 Matsushita Electric Ind Co Ltd リチウム二次電池用極板の製造方法、その製造法を用いたリチウム二次電池用極板とリチウム二次電池
CN101602925A (zh) * 2008-06-15 2009-12-16 比亚迪股份有限公司 一种无卤环氧树脂阻燃胶粘剂及其胶膜
CN102751473A (zh) * 2012-07-10 2012-10-24 上海索锂科技有限公司 一种大容量汽车用负极浆料的制备方法
CN107919459A (zh) * 2017-11-29 2018-04-17 中航锂电（洛阳）有限公司 锂离子电池负极片的制备方法、锂离子电池负极片及锂离子电池
CN109904447A (zh) * 2019-03-29 2019-06-18 蜂巢能源科技有限公司 锂离子电池及电动车
CN111554937A (zh) * 2020-05-26 2020-08-18 苏州凌威新能源科技有限公司 负极浆料、负极片及其制备方法
CN112909261A (zh) * 2021-05-08 2021-06-04 蜂巢能源科技有限公司 一种复合粘结剂及其制备方法和应用
CN114142028A (zh) * 2021-11-30 2022-03-04 蜂巢能源科技有限公司 负极材料、负极片及其制备方法和应用

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111816870B (zh) * 2019-04-10 2022-03-29 惠州市赛能电池有限公司 一种锂电池负极粘结剂及其制备方法和应用
CN111180659B (zh) * 2019-12-30 2021-03-12 江西安驰新能源科技有限公司 一种锂离子电池负极浆料的制备方法
CN111342048B (zh) * 2020-03-03 2021-08-24 珠海冠宇电池股份有限公司 一种粘结剂及其制备方法和应用
CN112054201A (zh) * 2020-09-10 2020-12-08 昆山宝创新能源科技有限公司 负极浆料、负极片及其制备方法和应用

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6183907B1 (en) * 1997-08-04 2001-02-06 Alcatel Binder for an electrode of an electrochemical system with a non-aqueous electrolyte
JP2008091192A (ja) * 2006-10-02 2008-04-17 Matsushita Electric Ind Co Ltd リチウム二次電池用極板の製造方法、その製造法を用いたリチウム二次電池用極板とリチウム二次電池
CN101602925A (zh) * 2008-06-15 2009-12-16 比亚迪股份有限公司 一种无卤环氧树脂阻燃胶粘剂及其胶膜
CN102751473A (zh) * 2012-07-10 2012-10-24 上海索锂科技有限公司 一种大容量汽车用负极浆料的制备方法
CN107919459A (zh) * 2017-11-29 2018-04-17 中航锂电（洛阳）有限公司 锂离子电池负极片的制备方法、锂离子电池负极片及锂离子电池
CN109904447A (zh) * 2019-03-29 2019-06-18 蜂巢能源科技有限公司 锂离子电池及电动车
CN111554937A (zh) * 2020-05-26 2020-08-18 苏州凌威新能源科技有限公司 负极浆料、负极片及其制备方法
CN112909261A (zh) * 2021-05-08 2021-06-04 蜂巢能源科技有限公司 一种复合粘结剂及其制备方法和应用
CN114142028A (zh) * 2021-11-30 2022-03-04 蜂巢能源科技有限公司 负极材料、负极片及其制备方法和应用

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