CN115418183A - Preparation method of novel negative electrode conductive glue solution - Google Patents

Preparation method of novel negative electrode conductive glue solution Download PDF

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Publication number
CN115418183A
CN115418183A CN202211208987.7A CN202211208987A CN115418183A CN 115418183 A CN115418183 A CN 115418183A CN 202211208987 A CN202211208987 A CN 202211208987A CN 115418183 A CN115418183 A CN 115418183A
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CN
China
Prior art keywords
negative electrode
glue solution
conductive
aqueous
conductive glue
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Pending
Application number
CN202211208987.7A
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Chinese (zh)
Inventor
郑小聪
骆文平
邹钰聪
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Guangdong Xiaodian New Energy Co ltd
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Guangdong Xiaodian New Energy Co ltd
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Priority to CN202211208987.7A priority Critical patent/CN115418183A/en
Publication of CN115418183A publication Critical patent/CN115418183A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
    • C09J9/02—Electrically-conducting adhesives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J131/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Adhesives based on derivatives of such polymers
    • C09J131/02—Homopolymers or copolymers of esters of monocarboxylic acids
    • C09J131/04—Homopolymers or copolymers of vinyl acetate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/24—Homopolymers or copolymers of amides or imides
    • C09J133/26—Homopolymers or copolymers of acrylamide or methacrylamide
    • 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
    • H01M4/624—Electric conductive fillers
    • 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
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/001—Conductive additives
    • 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

Abstract

The invention discloses a preparation method of a novel cathode conductive glue solution, which comprises the following components: the negative electrode aqueous gel and the conductive agent. The water-based adhesive is a water-based copolymer emulsion formed by copolymerizing one or more of substances such as acrylic acid, acrylamide, vinyl acetate, lithium methacrylate and the like, and the solid content of the water-based copolymer emulsion is 10-20%. The conductive agent is one or more of SP, KS-6, ketjen black, aqueous carbon nanotube conductive liquid and aqueous graphene conductive agent. According to the invention, the cathode aqueous glue and the conductive agent are used for preparing the cathode conductive glue solution, so that the utilization rate of the stirrer can be improved, and the energy consumption is reduced; the negative electrode conductive glue solution is prepared by using the negative electrode aqueous glue and the conductive agent, so that dust generated during batching can be reduced.

Description

Preparation method of novel negative electrode conductive glue solution
Technical Field
The invention relates to the technical field of dental comprehensive treatment machines, in particular to a preparation method of novel negative electrode conductive glue solution.
Background
The lithium battery has the advantages of large specific capacity, long charging and discharging service life, no memory effect, small environmental pollution and the like, can quickly replace nickel-chromium and nickel-hydrogen batteries since commercialization, and can be widely applied to portable electrical appliances such as mobile phones, notebook computers, cameras and the like. And has a trend of developing into new fields of electric automobiles, aerospace, energy storage power stations and the like. Compared with the traditional 3C digital battery, the requirements of the new fields on the lithium ion battery are more strict, and especially, the requirements on the cycle life, the energy density, the consistency of a battery pack and the safety of the battery are higher.
The electrode of the lithium battery is composed of a current collector, an active substance, a conductive agent, a binder and a dispersing agent. The conductive agent is generally selected from nanoparticles with good dot performance, which generally has larger specific surface area and ultrahigh surface energy, but the conductive agent is easy to agglomerate in the process of mixing with an active substance, the dispersion effect is poor, and the good or bad dispersion effect of the active substance and the conductive agent can directly influence the size of the battery capacity and the good or bad of the battery consistency.
In the production process of the cathode conductive glue solution in the industry at present, the traditional sectional type process steps are adopted for manufacturing the cathode of the lithium ion battery during manufacturing, and the traditional cathode stirring process flow is as follows: 1. dispersing CMC to prepare CMC glue solution; 2. adding a conductive agent; 3. adding main material graphite; 4. adding SBR, adjusting the viscosity of the slurry and discharging; so that the traditional cathode conductive glue solution has lower preparation efficiency.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a preparation method of a novel negative electrode conductive glue solution.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a novel negative electrode conductive glue solution comprises the following components: the negative electrode aqueous gel and the conductive agent.
In a further embodiment of the present invention, the aqueous glue is an aqueous copolymer emulsion obtained by copolymerizing one or more of acrylic acid, acrylamide, vinyl acetate, lithium methacrylate, and the like, and the solid content of the aqueous copolymer emulsion is 10 to 20%.
As a further scheme of the invention, the conductive agent is one or more of SP, KS-6, ketjen black, aqueous carbon nanotube conductive liquid and aqueous graphene conductive agent.
As a further scheme of the invention, the method comprises the following steps:
s1: weighing a proper weight part of negative electrode water-based adhesive and a conductive agent;
s2: adding the negative electrode aqueous gel and the conductive agent powder weighed in the step S1 into a high-speed stirrer for stirring to prepare a negative electrode conductive gel solution;
s3: emulsifying the negative conductive glue solution prepared in the step S2 in an emulsifier to obtain a more delicate negative conductive glue solution;
s4: and (4) putting the cathode conductive glue solution prepared in the step (S3) into a grinder for grinding, and filtering the ground cathode conductive glue solution by using a secondary filtering system to obtain a more fine cathode conductive glue solution.
In a further aspect of the present invention, the rotation speed of the high speed mixer in S1 is 300rpm to 500rpm.
As a further scheme of the invention, the size of the filter element filter screen used by the secondary filtering system in S4 is 100-150 meshes, and the connecting modes are sequentially arranged from low to high according to the mesh size of the filter elements.
The invention has the beneficial effects that:
1. the cathode conductive glue solution is prepared by using the cathode water-based glue and the conductive agent, so that the preparation efficiency of the cathode conductive glue solution can be improved, the utilization rate of the stirrer is increased, and the energy consumption is reduced.
2. The negative electrode conductive glue solution is prepared by using the negative electrode aqueous glue and the conductive agent, so that dust generated during batching (mainly dust of conductive agent powder) can be reduced.
Drawings
Fig. 1 is a schematic structural diagram of steps of a preparation method of a novel negative electrode conductive adhesive solution provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Examples
Referring to fig. 1, a preparation method of a novel negative electrode conductive glue solution comprises the following components: the negative electrode aqueous gel and the conductive agent.
In this embodiment, the aqueous adhesive is an aqueous copolymer emulsion obtained by copolymerizing one or more of acrylic acid, acrylamide, vinyl acetate, lithium methacrylate, and the like, and the solid content of the aqueous copolymer emulsion is 10 to 20%.
In this embodiment, the conductive agent is one or more of SP, KS-6, ketjen black, an aqueous carbon nanotube conductive solution, and an aqueous graphene conductive agent.
In this embodiment, the method includes the following steps:
s1: weighing a proper weight part of negative electrode water-based adhesive and a conductive agent;
s2: adding the negative electrode aqueous gel and the conductive agent powder weighed in the step S1 into a high-speed stirrer for stirring to prepare a negative electrode conductive gel solution;
s3: emulsifying the negative conductive glue solution prepared in the step S2 in an emulsifier to obtain a more delicate negative conductive glue solution;
s4: and (4) putting the cathode conductive glue solution prepared in the step (S3) into a grinder for grinding, and filtering the ground cathode conductive glue solution by using a secondary filtering system to obtain a more fine cathode conductive glue solution.
In this embodiment, the rotation speed of the high speed mixer in S1 is 300rpm to 500rpm.
In this embodiment, the size of the filter screen of the filter element used in the second-stage filtration system in S4 is 100-150 meshes, and the connection mode is sequentially installed from low to high according to the mesh size of the filter element.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
1. the cathode conductive glue solution is prepared by using the cathode aqueous glue and the conductive agent, so that the preparation efficiency of the cathode conductive glue solution can be improved, the utilization rate of a stirrer is increased, and the energy consumption is reduced;
2. the negative electrode conductive glue solution is prepared by using the negative electrode aqueous glue and the conductive agent, so that dust generated during batching (mainly dust of conductive agent powder) can be reduced.
For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The novel negative electrode conductive glue solution is characterized by comprising the following components: the negative electrode aqueous gel and the conductive agent.
2. The novel negative electrode conductive glue solution according to claim 1, wherein the aqueous glue is an aqueous copolymer emulsion obtained by copolymerizing one or more of acrylic acid, acrylamide, vinyl acetate, lithium methacrylate and the like, and the solid content of the aqueous copolymer emulsion is 10-20%.
3. The novel negative electrode conductive glue solution according to claim 1, wherein the conductive agent is one or more of SP, KS-6, ketjen black, an aqueous carbon nanotube conductive solution, and an aqueous graphene conductive agent.
4. The preparation method of the novel negative electrode conductive glue solution according to claim 1, characterized by comprising the following steps:
s1: weighing a proper weight part of negative electrode aqueous adhesive and a conductive agent;
s2: adding the negative electrode aqueous gel and the conductive agent powder weighed in the step S1 into a high-speed stirrer for stirring to prepare a negative electrode conductive gel solution;
s3: emulsifying the negative conductive glue solution prepared in the step S2 in an emulsifier to obtain a more delicate negative conductive glue solution;
s4: and (4) putting the cathode conductive glue solution prepared in the step (S3) into a grinder for grinding, and filtering the ground cathode conductive glue solution by using a secondary filtering system to obtain a more fine cathode conductive glue solution.
5. The preparation method of the novel negative electrode conductive glue solution according to claim 4, wherein the rotation speed of a high-speed stirrer in the S1 is 300-500 rpm.
6. The preparation method of the novel negative electrode conductive glue solution according to claim 4, wherein the size of a filter element filter screen used by the secondary filtering system in the S4 is 100-150 meshes, and the connection mode is sequentially installed from low to high according to the mesh size of the filter elements.
CN202211208987.7A 2022-09-30 2022-09-30 Preparation method of novel negative electrode conductive glue solution Pending CN115418183A (en)

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Application Number Priority Date Filing Date Title
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101246958A (en) * 2008-03-21 2008-08-20 成都中科来方能源科技有限公司 Lithium ion battery and combination electrode used for the same and production method thereof
CN102332600A (en) * 2010-12-17 2012-01-25 东莞新能源科技有限公司 Lithium ion battery
WO2020020856A1 (en) * 2018-07-24 2020-01-30 Fundación Cidetec Eco-friendly aqueous procedure to obtain high voltage cathode for li-ion batteries

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101246958A (en) * 2008-03-21 2008-08-20 成都中科来方能源科技有限公司 Lithium ion battery and combination electrode used for the same and production method thereof
CN102332600A (en) * 2010-12-17 2012-01-25 东莞新能源科技有限公司 Lithium ion battery
WO2020020856A1 (en) * 2018-07-24 2020-01-30 Fundación Cidetec Eco-friendly aqueous procedure to obtain high voltage cathode for li-ion batteries

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