CN114957534B - Heat-resistant battery negative electrode binder and preparation method thereof - Google Patents

Heat-resistant battery negative electrode binder and preparation method thereof Download PDF

Info

Publication number
CN114957534B
CN114957534B CN202110924309.XA CN202110924309A CN114957534B CN 114957534 B CN114957534 B CN 114957534B CN 202110924309 A CN202110924309 A CN 202110924309A CN 114957534 B CN114957534 B CN 114957534B
Authority
CN
China
Prior art keywords
negative electrode
reaction
electrode binder
heat
double bonds
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.)
Active
Application number
CN202110924309.XA
Other languages
Chinese (zh)
Other versions
CN114957534A (en
Inventor
戴莉
杨静
谭香莲
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.)
Guangzhou Rongdong New Materials Co ltd
Original Assignee
Guangzhou Rongdong New Materials 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 Guangzhou Rongdong New Materials Co ltd filed Critical Guangzhou Rongdong New Materials Co ltd
Priority to CN202110924309.XA priority Critical patent/CN114957534B/en
Publication of CN114957534A publication Critical patent/CN114957534A/en
Application granted granted Critical
Publication of CN114957534B publication Critical patent/CN114957534B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
    • 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
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

The invention provides a heat-resistant battery negative electrode binder and a preparation method thereof, wherein the raw materials comprise, by mass, 0.2-1.5% of an emulsifier, 10-20% of an unsaturated monomer containing double bonds, 0.5-5% of a functional monomer, 0.2-0.5% of an initiator, 0.1-0.3% of an auxiliary agent and the balance of deionized water. The negative electrode binder prepared by the invention has excellent bonding capability and heat resistance, and the capacitance stability of the lithium battery prepared by the negative electrode binder used by the invention is higher.

Description

Heat-resistant battery negative electrode binder and preparation method thereof
Technical Field
The invention relates to the field of binders for batteries, in particular to a heat-resistant battery negative electrode binder and a preparation method thereof.
Background
The binder is a key component of the battery electrode, and can improve or avoid electrode pulverization and stripping phenomena caused by expansion and shrinkage of electrode materials in the charge and discharge processes of the battery electrode. As the lithium electronic industry develops to the directions of light weight, thin thickness, small volume and high quality of the battery, the binder is also endowed with new requirements, and the requirements of strong binding capacity, good stability, small influence on the battery capacity and the like gradually become new evaluation standards of the binder. In chinese patent CN112151802a, a negative electrode binder for lithium battery is disclosed, which is prepared from halogenated styrene, n-butyl acrylate, isobutyl acrylate and 1, 3-butadiene as main raw materials, so that the binding capacity of the binder is improved, the service life of the battery is prolonged to a certain extent, and the polarity and the binding property of the binder are enhanced mainly through halogen atoms on benzene rings, but the lifting effect is limited. The invention provides a heat-resistant battery negative electrode adhesive and a preparation method thereof, and aims to further improve the adhesive property of the adhesive, improve the stability of the adhesive and reduce the influence of the adhesive on the battery capacity.
Disclosure of Invention
In order to solve the technical problems, the first aspect of the invention provides a heat-resistant battery negative electrode binder, which comprises the following raw materials in percentage by mass: 0.2 to 1.5 percent of emulsifying agent, 10 to 20 percent of unsaturated monomer containing double bonds, 0.5 to 5 percent of functional monomer, 0.2 to 0.5 percent of initiator, 0.1 to 0.3 percent of auxiliary agent and the balance of deionized water.
In a preferred embodiment, the raw materials comprise the following components in percentage by mass: 0.2 to 1.0 percent of emulsifying agent, 10 to 14 percent of unsaturated monomer containing double bonds, 0.5 to 2 percent of functional monomer, 0.2 to 0.5 percent of initiator, 0.1 to 0.3 percent of auxiliary agent and the balance of deionized water.
In a preferred embodiment, the raw materials comprise the following components in percentage by mass: 0.6% of emulsifying agent, 12% of unsaturated monomer containing double bonds, 1.2% of functional monomer, 0.35% of initiator, 0.2% of auxiliary agent and the balance of deionized water.
In a preferred embodiment, the emulsifier is selected from the group consisting of a combination of at least two of alkyl sulfonates, alkyl sulfates, alkyl benzene sulfonates, alkyl phenol ether sulfosuccinate sodium salts, alkyl phenol polyoxyethylene ethers, polyol fatty acid esters, fatty alcohol and ethylene oxide condensates.
In a preferred embodiment, the emulsifier is a complex of sodium dodecyl sulfonate, sodium p-styrenesulfonate, and octyl phenol polyoxyethylene ether.
In a preferred embodiment, the mass ratio of the sodium dodecyl sulfonate to the sodium p-styrenesulfonate to the octyl phenol polyoxyethylene ether is 1:1:2.
in the application, the applicant selects a plurality of specific emulsifying agents for compounding, and the hydrophobic groups have reactivity and possibly react with the reactive groups on the polymer molecules through the synergistic effect of the hydrophobic groups and the hydrophilic groups, so that the stability of the polymer molecules in the adhesive in the system-based adhesive is improved.
In a preferred embodiment, the unsaturated monomer containing double bond is a compound of styrene, acrylic acid esters, methacrylic acid and derivatives thereof.
In a preferred embodiment, the mass ratio of styrene, acrylic acid esters, methacrylic acid and derivatives thereof is (0.3-0.5): (0.4-0.7): (0.01-0.05).
In a preferred embodiment, the acrylic acid ester is at least one selected from the group consisting of methacrylic acid ester, ethyl acrylate, butyl acrylate, hydroxyethyl acrylate, hydroxypropyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, and epoxypropyl methacrylate.
In a preferred embodiment, the acrylic acid esters are a combination of methyl methacrylate and butyl acrylate.
In a preferred embodiment, the mass ratio of methyl methacrylate to butyl acrylate is (1-5): 1.
in a preferred embodiment, the mass ratio of methyl methacrylate to butyl acrylate is 2:1.
in a preferred embodiment, the methacrylic acid and its derivatives are selected from at least one of 1-acetoxymethacrylic acid, 1- (acetoxyethyl) acrylic acid, methyl 1-acetoxymethacrylate, methyl 1- (acetoxyethyl) acrylate, glycidyl methacrylate.
In a preferred embodiment, the methacrylic acid and its derivatives are glycidyl methacrylate.
In a preferred embodiment, the mass ratio of the styrene, the acrylic acid esters and the glycidyl methacrylate is 7:12:1.
the applicant finds that the copolymerization of unsaturated monomers containing double structures in specific types and specific mass ratios improves the high temperature resistance of polymer molecules and improves the elasticity of the adhesive, and the applicant speculates that the possible reasons are that the unsaturated monomers with rigid structures are selected in a system, the glass transition temperature of the copolymer is improved, the unsaturated monomers containing multiple methyl and multiple carbon chain structures are selected, and the tensile property of the copolymer is improved, and the applicant finds that when the mass ratio of styrene, acrylic esters and glycidyl methacrylate is 7:12:1 after a large number of experimental attempts, the content distribution of soft segments and hard segments in the polymer long chain molecules is optimal, and the optimal high temperature resistance and tensile property of the adhesive are endowed.
In a preferred embodiment, the functional monomer is selected from functional monomers having a functionality of 3-4.
In a preferred embodiment, the functional monomer having a functionality of 3 to 4 is selected from at least one of itaconic acid, acrylamide, glycidyl methacrylate, fumaric acid, N-methylolacrylamide, divinylbenzene.
In a preferred embodiment, the functional monomer is a compound of acrylamide, itaconic acid, glycidyl methacrylate.
In a preferred embodiment, the functional monomer further comprises a molecular weight regulator.
In a preferred embodiment, the molecular weight regulator is t-dodecyl mercaptan.
In a preferred embodiment, the mass ratio of the acrylamide, the itaconic acid, the glycidyl methacrylate and the tertiary dodecyl mercaptan is (0.8-1.5): (1.5-2.5): (0.5-0.8): (0.2-0.5).
In a preferred embodiment, the mass ratio of the acrylamide, the itaconic acid, the glycidyl methacrylate and the tertiary dodecyl mercaptan is 1:2:0.8:0.5.
in a preferred embodiment, the initiator is t-butyl hydroperoxide.
In a preferred embodiment, the auxiliary agent is selected from at least one of defoamer, preservative, toughening agent.
In a preferred embodiment, the defoamer is isopropanol.
In a preferred embodiment, the feedstock further comprises a pH adjustor which is a 10wt% aqueous sodium hydroxide solution.
The invention provides a preparation method of a heat-resistant battery anode binder, which comprises the following steps:
(1) Preparing seed emulsion: adding a part of deionized water into a reaction kettle, adding a proper amount of emulsifying agent and unsaturated monomer, uniformly stirring, dropwise adding a proper amount of initiator, and obtaining seed emulsion after the reaction is completed.
(2) Preparation of the adhesive: adding the seed emulsion into a reaction kettle, heating to 80-82 ℃, dropwise adding a reaction compound solution and an initiator, controlling the reaction temperature to 80-84 ℃, cooling after the reaction is completed, adding an auxiliary agent, and uniformly stirring to obtain the negative electrode binder.
In a preferred embodiment, the method comprises the steps of:
(1) Preparing seed emulsion: adding a part of deionized water into a reaction kettle, adding a proper amount of emulsifying agent, introducing nitrogen to expel air, heating to 50 ℃ while stirring, adding a proper amount of unsaturated monomer containing double bonds, uniformly stirring, dropwise adding a proper amount of tert-butyl hydroperoxide after stirring, dropwise adding for 40-50min, controlling the reaction temperature to be 50-55 ℃, preserving heat for reaction for 1h, and cooling to 40 ℃ to obtain seed emulsion.
(2) Preparation of the adhesive: adding the seed emulsion into a reaction kettle, heating to 80-82 ℃, dropwise adding the reaction compound solution and the tertiary butyl hydroperoxide, controlling the reaction temperature to 80-84 ℃ after 3h dropwise adding, reacting for 1h at a temperature of between 80 and 70 ℃, cooling to 70 ℃, filtering, taking a precipitate, cooling to 40 ℃, adding an auxiliary agent, and stirring uniformly to obtain the negative electrode binder.
In a preferred embodiment, the reaction compounding solution in the step (2) is a compound of deionized water, an emulsifier, an unsaturated monomer containing double bonds, and a functional monomer.
The applicant finds that in the experimental process, the adhesive is prepared by a two-step method, and the functional monomer is added in the step (2), so that the elasticity of the adhesive can be further improved, the contact degree of an electrode and a current collector in the charge-discharge cycle process of the lithium battery is improved, and the cycle performance of the lithium battery is improved. The applicant speculates that the possible reasons are that the functional monomer added in step (2) improves the steric properties of the crosslinked structure of the copolymer molecules, improves the bearing capacity of the copolymer molecules for compression and stretching, and improves the elasticity of the adhesive.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the seed emulsion is prepared firstly, and the adhesive is prepared by taking the seed emulsion as one of the raw materials, so that the molecular weight distribution range of polymer molecules in the adhesive is reduced, and the adhesive bonding and attaching stability of the adhesive are improved.
2. The invention adopts the adhesive obtained by copolymerizing a plurality of specific unsaturated monomers and functional monomers, and improves the stability and heat resistance of the adhesive through the synergistic effect of the molecule chain segment and the groups on the molecule chain branch. Meanwhile, the binder used in the invention improves the elasticity of the binder through copolymerization of specific monomers, thereby improving the contact degree of the electrode and the current collector in the charge-discharge cycle process of the lithium battery and improving the cycle performance of the lithium battery.
Detailed Description
Example 1
The invention provides a heat-resistant battery negative electrode binder, which comprises, by mass, 0.6% of an emulsifier, 12% of an unsaturated monomer containing double bonds, 1.2% of a functional monomer, 0.35% of tert-butyl hydroperoxide, 0.2% of isopropanol and the balance of deionized water.
Wherein the emulsifier is a compound substance of sodium dodecyl sulfonate, sodium p-styrenesulfonate and octyl phenol polyoxyethylene ether, and the mass ratio of the sodium dodecyl sulfonate to the sodium p-styrenesulfonate to the octyl phenol polyoxyethylene ether is 1:1:2.
the unsaturated monomer containing double bonds is a compound substance of styrene, methyl methacrylate, butyl acrylate and glycidyl methacrylate, and the mass ratio of the styrene to the methyl methacrylate to the butyl acrylate to the glycidyl methacrylate is 7:8:4:1.
the functional monomers are compound substances of acrylamide, itaconic acid, glycidyl methacrylate and tertiary dodecyl mercaptan, and the mass ratio of the acrylamide to the itaconic acid to the glycidyl methacrylate to the tertiary dodecyl mercaptan is 1:2:0.8:0.5.
the invention provides a preparation method of a heat-resistant battery anode binder, which comprises the following steps:
(1) Preparing seed emulsion: adding 60% deionized water into a reaction kettle, adding 80% emulsifying agent, introducing nitrogen to expel air, heating to 50 ℃ while stirring, adding 75% unsaturated monomer containing double bonds, dropwise adding 35% tertiary butyl hydroperoxide after uniformly stirring, dropwise adding for 40-50min, controlling the reaction temperature to be 50-55 ℃, preserving heat for reaction for 1h, and cooling to 40 ℃ to obtain seed emulsion.
(2) Preparation of the adhesive: adding the seed emulsion into a reaction kettle, heating to 80 ℃, dropwise adding a reaction compound solution and 65% of tertiary butyl hydroperoxide, controlling the reaction temperature to 82 ℃ after 3 hours, carrying out heat preservation reaction for 1 hour, cooling to 70 ℃, filtering, taking precipitate, cooling to 40 ℃, adding isopropanol, uniformly stirring, and regulating the pH value by using 10wt% of sodium hydroxide aqueous solution to obtain the negative electrode binder.
Wherein the reaction compound solution is a compound material of residual deionized water, residual emulsifying agent, residual unsaturated monomer containing double bonds and residual functional monomer.
Performance testing
1. Adhesive stability test
The negative electrode binder prepared in the examples was placed in an environment of 25 ℃ and 50 ℃ to conduct a binder stability test. The result shows that the adhesive does not appear turbidity, layering and the like when the adhesive is placed for 1 year in an environment of 25 ℃; the adhesive is placed in an environment of 50 ℃ for 1 month, and the phenomena of turbidity, layering and the like do not occur.
2. Stability test of negative electrode slurry
And mixing the anode binder, the conductive agent super P and the silicon powder prepared in the embodiment according to the mass ratio of 2:1:3 to obtain anode slurry, and measuring the solid content reduction of the upper layer of the anode slurry and the stability of the anode slurry. The data are recorded in table 1.
The% decrease in solids = (initial solids-test solids)/initial solids × 100%.
TABLE 1
3. Negative electrode slurry peel strength test
And preparing the prepared negative electrode slurry into a negative electrode plate of the lithium battery according to a general method for a person skilled in the art, cutting the prepared negative electrode plate into a shape of 100mm 10mm, adhering the negative electrode plate onto a glass plate by using double faced adhesive tape, bending the negative electrode plate by 180 degrees after a press roll, and stripping the negative electrode plate by using a testing machine. The result showed that the peel strength of the negative electrode sheet was 0.65N/m.
4. Cycle performance test
And preparing the negative plate for peel strength test into a lithium battery according to a general method for a person skilled in the art, performing charge-discharge cycle on the lithium battery, charging 3.5V with 1C multiplying power current, and performing constant voltage of 3.5V, then discharging the battery with 1C multiplying power current, and finishing one cycle with a cut-off voltage of 2.5V. The lithium battery was subjected to cycle performance test at 60 ℃, 20 ℃ and-20 ℃ and the data are recorded in table 2.
TABLE 2
Circulation temperature (DEG C) Retention%
60 66.2
25 85.5
-20 82.3

Claims (1)

1. The heat-resistant battery negative electrode binder is characterized by comprising, by mass, 0.6% of an emulsifier, 12% of an unsaturated monomer containing double bonds, 1.2% of a functional monomer, 0.35% of tert-butyl hydroperoxide, 0.2% of isopropanol and the balance of deionized water;
the emulsifier is a compound substance of sodium dodecyl sulfonate, sodium p-styrenesulfonate and octyl phenol polyoxyethylene ether, and the mass ratio of the sodium dodecyl sulfonate to the sodium p-styrenesulfonate to the octyl phenol polyoxyethylene ether is 1:1:2;
the unsaturated monomer containing double bonds is a compound substance of styrene, methyl methacrylate, butyl acrylate and glycidyl methacrylate, and the mass ratio of the styrene to the methyl methacrylate to the butyl acrylate to the glycidyl methacrylate is 7:8:4:1, a step of;
the functional monomers are compound substances of acrylamide, itaconic acid, glycidyl methacrylate and tertiary dodecyl mercaptan, and the mass ratio of the acrylamide to the itaconic acid to the glycidyl methacrylate to the tertiary dodecyl mercaptan is 1:2:0.8:0.5;
the preparation method of the heat-resistant battery negative electrode binder comprises the following steps:
(1) Preparing seed emulsion: adding 60% deionized water into a reaction kettle, adding 80% emulsifying agent, introducing nitrogen to expel air, heating to 50 ℃ while stirring, adding 75% unsaturated monomer containing double bonds, dropwise adding 35% tertiary butyl hydroperoxide after uniformly stirring, dropwise adding for 40-50min, controlling the reaction temperature to be 50-55 ℃, preserving heat for reaction for 1h, and cooling to 40 ℃ to obtain seed emulsion;
(2) Preparation of the adhesive: adding the seed emulsion into a reaction kettle, heating to 80 ℃, dropwise adding a reaction compound solution and 65% of tertiary butyl hydroperoxide, controlling the reaction temperature to 82 ℃ after 3 hours of dropwise adding, performing heat preservation reaction for 1 hour, cooling to 70 ℃, filtering, taking a precipitate, cooling to 40 ℃, adding isopropanol, uniformly stirring, and regulating the pH value by using 10wt% of sodium hydroxide aqueous solution to obtain the negative electrode binder;
the reaction compound solution is a compound material of residual deionized water, residual emulsifying agent, residual unsaturated monomer containing double bonds and residual functional monomer.
CN202110924309.XA 2021-08-12 2021-08-12 Heat-resistant battery negative electrode binder and preparation method thereof Active CN114957534B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110924309.XA CN114957534B (en) 2021-08-12 2021-08-12 Heat-resistant battery negative electrode binder and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110924309.XA CN114957534B (en) 2021-08-12 2021-08-12 Heat-resistant battery negative electrode binder and preparation method thereof

Publications (2)

Publication Number Publication Date
CN114957534A CN114957534A (en) 2022-08-30
CN114957534B true CN114957534B (en) 2024-03-26

Family

ID=82973941

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110924309.XA Active CN114957534B (en) 2021-08-12 2021-08-12 Heat-resistant battery negative electrode binder and preparation method thereof

Country Status (1)

Country Link
CN (1) CN114957534B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107384261A (en) * 2017-07-21 2017-11-24 中国乐凯集团有限公司 A kind of lithium ion battery separator refractory layer aqueous binder, preparation method and applications
CN109777328A (en) * 2019-01-18 2019-05-21 广州天赐高新材料股份有限公司 A kind of negative electrode of lithium ion battery aqueous binders and preparation method thereof, negative electrode material
CN112151802A (en) * 2020-09-25 2020-12-29 宜昌虎柏新能源有限公司 Negative electrode binder for lithium ion battery, preparation method of negative electrode binder and lithium ion battery containing negative electrode binder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107384261A (en) * 2017-07-21 2017-11-24 中国乐凯集团有限公司 A kind of lithium ion battery separator refractory layer aqueous binder, preparation method and applications
CN109777328A (en) * 2019-01-18 2019-05-21 广州天赐高新材料股份有限公司 A kind of negative electrode of lithium ion battery aqueous binders and preparation method thereof, negative electrode material
CN112151802A (en) * 2020-09-25 2020-12-29 宜昌虎柏新能源有限公司 Negative electrode binder for lithium ion battery, preparation method of negative electrode binder and lithium ion battery containing negative electrode binder

Also Published As

Publication number Publication date
CN114957534A (en) 2022-08-30

Similar Documents

Publication Publication Date Title
CN115050922B (en) Water-based adhesive and preparation method and application thereof
CN110183584B (en) Acrylonitrile polymer emulsion binder and preparation method thereof
WO2019242318A1 (en) Waterborne binder, preparation method therefor and use thereof
JP7480310B2 (en) Battery adhesive, water-based battery adhesive, and lithium-ion battery negative electrode sheet
CN114573751B (en) Dispersing agent for lithium ion battery, preparation method of dispersing agent, positive electrode slurry, positive electrode plate and lithium ion battery
CN114573746B (en) High-lithium-content high-molecular-weight lithium acrylate emulsion and preparation method and application thereof
CN113480695A (en) Core-shell binder material and preparation method thereof
CN112701419A (en) SEI film material, preparation method and negative plate
CN112279982A (en) Binder for silicon-based negative electrode and lithium ion battery containing same
CN114957534B (en) Heat-resistant battery negative electrode binder and preparation method thereof
CN117264115A (en) Soap-free emulsion binder, lithium ion battery cathode and lithium ion battery
CN111082062A (en) Water-soluble binder for lithium ion battery and preparation method thereof
CN117050237A (en) Solution type binder and preparation method and application thereof
CN113880999A (en) Adhesive and preparation method and application thereof
CN116217794B (en) Solution type binder and preparation method and application thereof
CN117025140A (en) Water-based adhesive and preparation method thereof
CN117417474A (en) Negative electrode additive for lithium battery
CN111916740B (en) Polyunsaturated carboxylic group controllable crosslinking type binder and lithium ion battery containing same
CN115746756B (en) High-temperature-resistant acrylic ester pressure-sensitive adhesive liquid and preparation method of acrylic ester pressure-sensitive adhesive
CN117683167A (en) Aqueous thickening dispersant for lithium ion battery cathode and preparation method thereof
CN116655862B (en) Preparation method of comb-type positive electrode dispersion material and preparation method of low-internal-resistance electrode slice
CN115850591A (en) Preparation method of emulsion type binder and application of emulsion type binder in lithium ion battery cathode
CN114597413B (en) Preparation method of silicon-based negative electrode battery binder
CN116111100B (en) Lithium ion battery negative electrode material, preparation method thereof and lithium ion battery
CN115287021B (en) Waterproof Hou Shuixing acrylate pressure-sensitive adhesive and preparation method thereof

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
GR01 Patent grant
GR01 Patent grant