CN108735966A - The preparation method of lithium ion battery anode glue size - Google Patents
The preparation method of lithium ion battery anode glue size Download PDFInfo
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- CN108735966A CN108735966A CN201710239361.5A CN201710239361A CN108735966A CN 108735966 A CN108735966 A CN 108735966A CN 201710239361 A CN201710239361 A CN 201710239361A CN 108735966 A CN108735966 A CN 108735966A
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- Prior art keywords
- lithium ion
- ion battery
- battery anode
- preparation
- glue size
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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
- H01M4/04—Processes of manufacture in general
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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- 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
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- Chemical & Material Sciences (AREA)
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- Nanotechnology (AREA)
- Physics & Mathematics (AREA)
- Composite Materials (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
A kind of preparation method of lithium ion battery anode glue size, including step：Positive electrode active materials are provided；There is provided conductive agent, wherein conductive agent includes nano material, and conductive agent is formed conductive agent suspension by stirring pretreatment dispersion；Three parts of binder solutions are provided；Conductive agent suspension and first part of binder solution are added in positive electrode active materials, stir to get primary slurry in advance；Second part of binder solution is added in the primary slurry, secondary agitation obtains secondary slurries；And third part binder solution is added in the secondary slurries, it is again stirring for obtaining the lithium ion battery anode glue size.
Description
Technical field
The present invention relates to field of lithium ion battery more particularly to a kind of preparation methods of lithium ion battery anode glue size.
Background technology
Lithium ion battery energy density is big, has extended cycle life, and high rate performance and has a safety feature, environmentally protective, is current
Main energy sources product.Anode is the most important component part of lithium ion battery, determines the core chemical property of battery, lithium from
The battery core of sub- battery requires anode pole piece to have excellent electric conductivity.
Currently, battery producer in anode sizing agent all by being added carbon black class, graphite-like or carbon nanomaterial such as carbon nanometer
The conductive agents such as pipe improve the conductive characteristic between active material and between active material and collector.Carbon black class and graphite-like
Conductive agent electric conductivity is poor, and preferable conductive effect can just be played by generally requiring addition larger quantities, just be needed so more
Binder, and the increase of binder can influence the coating of anode pole piece and pole piece is caused to be difficult to dry, while can cause of the same race
Battery capacity is small or big with capacity batteries volume.And there is carbon nanomaterial higher specific surface area, electric conductivity to be far above
Carbon black and electrically conductive graphite, if therefore adding carbon nanomaterial in right amount in conductive agent, production cost can be controlled and improving work
Between property substance and the conductive characteristic between active material and collector, to which the power characteristic and cycle of lithium battery can be improved
Service life.
But carbon nanomaterial is because of large specific surface area, in the medium often with agglomeration, cause it is common lead material as how
Rice carbon pipe can not be used effectively；And there are dead angles for dispersion processing in dispersion process for the anode sizing agent containing carbon nanomaterial
(being generally commonly called as dead zone), dispersion efficiency are insufficient；In addition, to make mechanicals efforts dispersion powder reach homogeneity, uniformly displacement is high
Solid content slurry, therefore required mixing time is partially long, generally about 6-10 hours, production efficiency was bad；That is, carbon nanometer material
Expect that the premise being applied in lithium ion battery is dispersion and to get well, if dispersion is bad, influences the processing performance of slurry, it is final conductive
Effect might as well other conductive agents.
Invention content
Therefore, it is necessary to provide a kind of preparation method of lithium ion battery anode glue size, so as to get anode sizing agent can
Dispersion well, and slurry processing performance is good.
A kind of preparation method of lithium ion battery anode glue size, including step：Positive electrode active materials are provided；It provides conductive
Agent, wherein conductive agent includes nano material, and conductive agent is formed conductive agent suspension by stirring pretreatment dispersion；There is provided three
Part binder solution；Conductive agent suspension and first part of binder solution are added in positive electrode active materials, stirred to get in advance
Primary slurry；Second part of binder solution is added in the primary slurry, secondary agitation obtains secondary slurries；And by third part
Binder solution is added in the secondary slurries, is again stirring for obtaining the lithium ion battery anode glue size.
Compared with the existing technology, the preparation method of lithium ion battery anode glue size of the present invention is allowed using stirring pretreatment and is led
Electric agent disperses to form conductive agent suspension, to abolish the agglomeration of nano material, nano material is enable disposably to put into,
New processing procedure simplifies production stage and improves production yields (reduced time is to improve production capacity) between batch simultaneously, to both ensure that height
Solid content improves the solid content of anode sizing agent, and shortens incorporation time, improves pulping efficiency；Also, appropriateness regulation and control slurry exists
It is effective can to penetrate binder that is, binder is divided into three parts and is added in three times for binder ratio in each mix stages
Clad anode powder and assistant director of a film or play's carbon materials, so as to provide enough dispersion repulsion avoid powder between Fan Dewaerli mutually inhale
Draw, slurry is made to reach equally distributed quasi-network structure.
Description of the drawings
Nothing
Main element symbol description
Nothing
The present invention will be further illustrated in following specific implementation mode.
Specific implementation mode
The technical program embodiment provides a kind of preparation method of lithium ion battery anode glue size, including：
(1) positive electrode active materials are provided
It is in the present embodiment, the progress of positive-active powder body material is dry-mixed, obtain the positive electrode active materials of homogeneous, wherein mixed
The time of conjunction is 5 minutes to 15 minutes.
Preferably, the main component of the positive-active powder body material is LiFePO4, cobalt acid lithium, lithium nickelate, phosphoric acid
One kind in manganese lithium.
It is highly preferred that the positive-active powder body material is cobalt acid lithium.
Preferably, the mixed time is about 10 minutes.
(2) preparation of conductive agent suspension
In the present embodiment, conductive agent is provided, includes nano material in the conductive agent, and the conductive agent is being disperseed
Dispersion obtains a conductive agent suspension in agent.
Preferably, the nano material is carbon nanotube.
Preferably, the conductive agent also includes one kind or whole in electrically conductive graphite class or conductive black class conductive agent；More
Preferably, the conductive black class conductive agent is conductive black Super-P；The electrically conductive graphite class conductive agent is electrically conductive graphite
KS-6。
Preferably, the dispersant is ethyl alcohol or polyvinylpyrrolidone.
In the present embodiment, the conductive agent is obtained by stirring to pre-process the conductive agent being dispersed in the dispersant
Suspension is pre-processed by stirring, can abolish the agglomeration of nano material, is disposably added in subsequent step to realize
Enter the conductive agent suspension.
Wherein, stirring pretreated process conditions is：It revolves round the sun 20~50 revs/min (r/min), 1000~2500r/ of rotation
min。
Preferably, stirring pretreated process conditions is：It revolves round the sun 30 revs/min (r/min), rotation 2000r/min.
(3) preparation of binder solution
In the present embodiment, binder is provided and the binder is dissolved in solvent obtains a binder solution；By institute
It states binder solution and is divided into three parts, wherein first part of accounting is 20% to 30%, and second part of accounting is 25% to 35%, the
Three parts of accounting is 35% to 55%.
Preferably, the binder is aqueous binders or Kynoar (PVDF).
Preferably, the solvent is deionized water or N-Methyl pyrrolidone (NMP).
(4) preparation of primary slurry
In the present embodiment, by conductive agent suspension and first part of binder solution be added to it is dry-mixed after active material in,
And stir evenly in advance, obtain primary slurry.Wherein, the time stirred in advance is 60 minutes to 120 minutes.
Preferably, the time stirred in advance is about 90 minutes.
Preferably, the process conditions stirred in advance are：It revolves round the sun 20~50 revs/min (r/min), 1000~2500r/ of rotation
min。
It is highly preferred that the process conditions stirred in advance are：It revolves round the sun 30 revs/min (r/min), rotation 1500r/min.
The addition of (5) second parts of binders
In the present embodiment, second part of binder is added, and so that the dispersion of each component particle is tended to by secondary agitation
Uniformly, secondary slurries are obtained.Wherein, the time of secondary agitation is 20 minutes to 40 minutes.
Preferably, the process conditions that secondary agitation obtains the secondary slurries are：Revolve round the sun 20~50r/min, rotation 1000
~2500r/min.
It is highly preferred that the process conditions that secondary agitation obtains the secondary slurries are：Revolve round the sun 30r/min, rotation 1500r/
min。
Preferably, the time of secondary agitation is about 30 minutes.
(6) addition of third part binder
In the present embodiment, third part binder is added, and by being again stirring for that the distribution of each component particle is made to tend to
Stablize to get to required lithium ion battery anode glue size.Wherein, the time being again stirring for is 20 minutes to 40 minutes.
Preferably, the process conditions for being again stirring for obtaining the lithium ion battery anode glue size are：Revolve round the sun 20~50r/
Min, 1000~2500r/min of rotation.
It is highly preferred that the process conditions for being again stirring for obtaining the lithium ion battery anode glue size are：Revolve round the sun 30r/min,
Rotation 1500r/min.
Preferably, the time being again stirring for is about 30 minutes.
The preparation method of lithium ion battery anode glue size of the present invention obtains conductive agent suspension using stirring pretreatment, with
The agglomeration for abolishing nano material, to enable nano material disposably to put into, while new processing procedure simplify production stage with
Production yields (reduced time is to improve production capacity) improves anode sizing agent to both ensure that high solids content between improving batch
Solid content, and shorten incorporation time, improve pulping efficiency；Also, binder ratio of the appropriateness regulation and control slurry in each mix stages
Example can penetrate the effective clad anode powder of binder and assistant director of a film or play's carbon that is, binder is divided into three parts and is added in three times
Material, so as to provide enough dispersion repulsion avoid powder between Fan Dewaerli attract each other, so that slurry is reached and be uniformly distributed
Quasi-network structure.
Lithium ion battery anode glue size prepared by the present invention can be used for preparing lithium ion battery.
Embodiment 1
The present embodiment provides a kind of preparation methods of lithium ion battery anode glue size, including：
(1) cobalt acid lithium powder is provided, by dry-mixed 10 minutes of cobalt acid lithium powder, obtains the active material of homogeneous.
(2) conductive agent is provided, includes carbon nanotube and conductive black Super-P in the conductive agent, and led described
Electric agent obtains conductive agent suspension by stirring pretreatment dispersion in ethanol.
(3) aqueous binders are provided and the aqueous binders are dissolved in deionized water and obtain a binder solution；
The binder solution is divided into three parts, wherein first part of accounting is 25%, and second part of accounting is 30%, and third part accounts for
Than being 45%.
(4) by conductive agent suspension and first part of binder solution be added to it is dry-mixed after active material in, and stir in advance
Uniformly, primary slurry is obtained.Wherein, the time stirred in advance is 90 minutes.Wherein, the process conditions stirred in advance are：Revolve round the sun 30r/
Min, rotation 1500r/min.
(5) second part of binder is added in the primary slurry, and each component particle is made by secondary agitation
Dispersion tends to be uniform, obtains secondary slurries.Wherein, the time of secondary agitation is 30 minutes.Secondary agitation obtains the secondary slurry
The process conditions of material are：Revolve round the sun 30r/min, rotation 1500r/min.
(6) third part binder is added in the secondary slurries, and by being again stirring for making each component particle
Distribution tends towards stability to get to required lithium ion battery anode glue size.Wherein, the time being again stirring for is 30 minutes.Again
The process conditions for stirring to get the lithium ion battery anode glue size are：Revolve round the sun 30r/min, rotation 1500r/min.
Embodiment 2
The present embodiment provides a kind of preparation methods of lithium ion battery anode glue size, including：
(1) cobalt acid lithium powder is provided, by dry-mixed 10 minutes of cobalt acid lithium powder, obtains the active material of homogeneous.
(2) conductive agent is provided, includes carbon nanotube and electrically conductive graphite KS-6 in the conductive agent, and by the conductive agent
Stirring pretreatment dispersion obtains conductive agent suspension in polyvinylpyrrolidone.
(2) Kynoar is provided and the Kynoar is dissolved in N-Methyl pyrrolidone and obtains a binder
Solution；The binder solution is divided into three parts, wherein first part of accounting is 30%, and second part of accounting is 30%, third part
Accounting be 40%.
(3) by conductive agent suspension and first part of binder solution be added to it is dry-mixed after active material in, and stir in advance
Uniformly, primary slurry is obtained.Wherein, the time stirred in advance is 90 minutes.Wherein, the process conditions stirred in advance are：Revolve round the sun 30r/
Min, rotation 1500r/min.
(4) second part of binder is added in the primary slurry, and each component particle is made by secondary agitation
Dispersion tends to be uniform, obtains secondary slurries.Wherein, the time of secondary agitation is 30 minutes.Secondary agitation obtains the secondary slurry
The process conditions of material are：Revolve round the sun 30r/min, rotation 2000r/min.
(5) third part binder is added in the secondary slurries, and by being again stirring for making each component particle
Distribution tends towards stability to get to required lithium ion battery anode glue size.Wherein, the time being again stirring for is 30 minutes.Again
The process conditions for stirring to get the lithium ion battery anode glue size in advance are：Revolve round the sun 40r/min, rotation 2000r/min.
Test obtains, and the lithium ion battery anode glue size that above-described embodiment 1,2 obtains is in class net distribution, and consistency is good,
Stability is high, not free settling.
It is understood that for those of ordinary skill in the art, can be conceived with the technique according to the invention and be done
Go out various other corresponding changes and deformation, and all these changes and deformation should all belong to the protection model of the claims in the present invention
It encloses.
Claims (17)
1. a kind of preparation method of lithium ion battery anode glue size, including step：
Positive electrode active materials are provided；
There is provided conductive agent, wherein conductive agent includes nano material, and conductive agent is formed conductive agent by stirring pretreatment dispersion to be hanged
Turbid；
Three parts of binder solutions are provided；
Conductive agent suspension and first part of binder solution are added in positive electrode active materials, stir to get primary slurry in advance；
Second part of binder solution is added in the primary slurry, secondary agitation obtains secondary slurries；And
Third part binder solution is added in the secondary slurries, is again stirring for obtaining the lithium ion battery anode glue size.
2. the preparation method of lithium ion battery anode glue size as described in claim 1, which is characterized in that the positive-active material
Material is that positive-active powder body material is carried out dry-mixed obtain.
3. the preparation method of lithium ion battery anode glue size as claimed in claim 2, which is characterized in that the dry-mixed time is 5
Minute was to 15 minutes.
4. the preparation method of lithium ion battery anode glue size as described in claim 1, which is characterized in that the positive-active material
Material is cobalt acid lithium.
5. the preparation method of lithium ion battery anode glue size as described in claim 1, which is characterized in that stirring pretreatment obtains
The process conditions of the conductive agent suspension are：Revolve round the sun 20~50r/min, 1000~2500r/min of rotation.
6. the preparation method of lithium ion battery anode glue size as described in claim 1, which is characterized in that the conductive agent is suspended
Liquid is the suspension disperseed in dispersant, and the dispersant is ethyl alcohol or polyvinylpyrrolidone.
7. the preparation method of lithium ion battery anode glue size as described in claim 1, which is characterized in that the conductive agent also wraps
One kind or whole in class containing electrically conductive graphite or conductive black class conductive agent.
8. the preparation method of lithium ion battery anode glue size as claimed in claim 7, which is characterized in that the conductive agent includes
Carbon nanotube and conductive black Super-P.
9. the preparation method of lithium ion battery anode glue size as described in claim 1, which is characterized in that three parts of binders
Solution is divided into three parts after binder is dissolved in solvent and obtains.
10. the preparation method of lithium ion battery anode glue size as claimed in claim 9, which is characterized in that the binder is
Aqueous binders or Kynoar；The solvent is deionized water or N-Methyl pyrrolidone.
11. the preparation method of lithium ion battery anode glue size as claimed in claim 9, which is characterized in that three parts of bondings
Agent solution is assigned as：First part of accounting is 20% to 30%, and second part of accounting is 25% to 35%, and the accounting of third part is
35% to 55%.
12. the preparation method of lithium ion battery anode glue size as described in claim 1, which is characterized in that by conductive agent and
It is 60 to 120 minutes that a binder solution, which is added to time for being stirred in advance in positive electrode active materials,.
13. the preparation method of lithium ion battery anode glue size as described in claim 1, which is characterized in that the technique stirred in advance
Condition is：It revolves round the sun 20~50 revs/min (r/min), 1000~2500r/min of rotation.
14. the preparation method of lithium ion battery anode glue size as described in claim 1, which is characterized in that secondary agitation obtains
The time of the secondary slurries is 20 minutes to 40 minutes.
15. the preparation method of lithium ion battery anode glue size as described in claim 1, which is characterized in that secondary agitation obtains
The process conditions of the secondary slurries are：Revolve round the sun 20~50r/min, 1000~2500r/min of rotation.
16. the preparation method of lithium ion battery anode glue size as described in claim 1, which is characterized in that be again stirring for when
Between be 20 minutes to 40 minutes.
17. the preparation method of lithium ion battery anode glue size as described in claim 1, which is characterized in that be again stirring for obtaining
The process conditions of the lithium ion battery anode glue size are：Revolve round the sun 20~50r/min, 1000~2500r/min of rotation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710239361.5A CN108735966A (en) | 2017-04-13 | 2017-04-13 | The preparation method of lithium ion battery anode glue size |
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| CN201710239361.5A CN108735966A (en) | 2017-04-13 | 2017-04-13 | The preparation method of lithium ion battery anode glue size |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817889A (en) * | 2019-01-24 | 2019-05-28 | 佛山市实达科技有限公司 | A kind of preparation method of lithium ion battery positive electrode slurry |
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| CN101087017A (en) * | 2006-09-08 | 2007-12-12 | 长沙理工大学 | Anode slice of high-power and large-capacity lithium ion battery and its making method |
| CN102738446A (en) * | 2011-04-15 | 2012-10-17 | 比克国际(天津)有限公司 | Lithium ion battery slurry, preparation method of the lithium ion battery slurry, and lithium ion battery |
| CN103606650A (en) * | 2013-11-30 | 2014-02-26 | 东莞市金源电池科技有限公司 | Technology for dispersing carbon nanotubes in lithium ion battery slurry |
| CN106170879A (en) * | 2014-01-13 | 2016-11-30 | 杜拉塞尔美国经营公司 | Preparation cathode slurry and the method for negative electrode |
-
2017
- 2017-04-13 CN CN201710239361.5A patent/CN108735966A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101087017A (en) * | 2006-09-08 | 2007-12-12 | 长沙理工大学 | Anode slice of high-power and large-capacity lithium ion battery and its making method |
| CN102738446A (en) * | 2011-04-15 | 2012-10-17 | 比克国际(天津)有限公司 | Lithium ion battery slurry, preparation method of the lithium ion battery slurry, and lithium ion battery |
| CN103606650A (en) * | 2013-11-30 | 2014-02-26 | 东莞市金源电池科技有限公司 | Technology for dispersing carbon nanotubes in lithium ion battery slurry |
| CN106170879A (en) * | 2014-01-13 | 2016-11-30 | 杜拉塞尔美国经营公司 | Preparation cathode slurry and the method for negative electrode |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817889A (en) * | 2019-01-24 | 2019-05-28 | 佛山市实达科技有限公司 | A kind of preparation method of lithium ion battery positive electrode slurry |
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