CN105047854B - A kind of lithium ion battery cathode slurry preparation method - Google Patents
A kind of lithium ion battery cathode slurry preparation method Download PDFInfo
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- CN105047854B CN105047854B CN201510371881.2A CN201510371881A CN105047854B CN 105047854 B CN105047854 B CN 105047854B CN 201510371881 A CN201510371881 A CN 201510371881A CN 105047854 B CN105047854 B CN 105047854B
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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
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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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- 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 kind of lithium ion battery cathode slurry preparation method, and active material, thickener are added mixer in 500 800 revs/min of 20 25 revs/min of revolution speed, rate of dispersion stirrings；Addition accounts for the solvent of powder proportion 55% 60% in 800 1200 revs/min of 20 30 revs/min of revolution speed, rate of dispersion stirrings；Addition accounts for the solvent of powder proportion 13% 18% in 800 1200 revs/min of 20 30 revs/min of revolution speed, rate of dispersion stirrings；Conductive agent is added in 800 1200 revs/min of 20 30 revs/min of revolution speed, rate of dispersion stirrings；Binding agent and remaining solvent are added in 800 1000 revs/min of 25 30 revs/min of revolution speed, rate of dispersion stirrings；In revolution speed, 20 25 revs/min carry out vacuumizing stirring.Mixing time of the present invention is short, pulp particle degree is small, uniform and stable.
Description
Technical field
The invention belongs to electrochemical field, is related to a kind of lithium ion battery cathode slurry preparation method.
Background technology
Lithium ion battery energy density is big, has extended cycle life, and has a safety feature, environmentally friendly, turns into people's research
Emphasis, not only in terms of battery performance, also paid close attention in terms of production efficiency, production cost by people.Produce lithium from
First process of sub- battery is to close slurry, and the quality for closing slurry slurry directly determines the quality and battery with two side terminals of coating,
The efficiency for closing slurry affects the production cycle of lithium battery simultaneously.At present water system cathode size conjunction slurry mode be by active material,
Thickener, conductive agent, binding agent etc. sequentially add step of dividing the work again and are stirred conjunction slurry, and such a slurry-stirring process is unfavorable for material with leading
The dispersed speed of electric agent and contact, contact surface is smaller and slurry rate of dispersion is inconsistent, and conductive agent is unfavorable for fully attached
Above material；Grown with mixing time（General mixing time is more than 8 hours）, slurry solid content is low, slurry uniformity
It is the shortcomings of difference, electric conductivity difference, serious to restrict the lifting of production capacity, and cause painting process fraction defective more.
The content of the invention
The purpose of the present invention is exactly to solve the above-mentioned problems in the prior art, there is provided a kind of mixing time is short, slurry
Solid content is high, pulp particle degree is small, lithium ion battery cathode slurry preparation method that is uniform and stable, improving its electric conductivity.
To solve the above problems, the technical solution of the present invention is：A kind of lithium ion battery cathode slurry preparation method,
It comprises the following steps：
By weight calculating：Active material is Delanium, accounts for 47-53 parts；Thickener is sodium carboxymethylcellulose CMC,
Account for 0.5-1.0 parts；Conductive agent is conductive carbon black or electrically conductive graphite or conductive agent super-p, accounts for 0.5-0.7 parts；Binding agent is fourth
Benzene rubber SBR, accounts for 2.0-3.0 parts；Solvent is deionized water, accounts for 45-50 parts.
The thickener of active material, the amount the amount is added in planetary mixer, in revolution speed 20-25
Rev/min, under conditions of 500-800 revs/min of rate of dispersion, stirring 25-30 minutes, which obtain, has added powder；
The solvent for accounting for and having added powder proportion 55%-60% is added, in 20-30 revs/min of revolution speed, is disperseed
Under conditions of 800-1200 revs/min of speed, 50-60 minutes are stirred；
The solvent for accounting for and having added powder proportion 13%-18% is added, in 20-30 revs/min of revolution speed, is disperseed
Under conditions of 800-1200 revs/min of speed, 50-60 minutes are stirred；
The conductive agent of the amount is added, in 20-30 revs/min of revolution speed, 800-1200 revs/min of rate of dispersion
Under conditions of, stir 50-60 minutes；
The binding agent of the amount and the remaining solvent are added, in 25-30 revs/min of revolution speed, scattered speed
Under conditions of 800-1000 revs/min of degree, 30-40 minutes are stirred；
Continue to stir, under conditions of 20-25 revs/min of revolution speed, carry out vacuumizing stirring, 20-30 points of stirring
Clock, slurry is made.
Preferably, the control of whipping process slurry temperature is at 25-45 DEG C.
Preferably, vacuumize Zhen Kong Du≤- 0.09MPa during stirring.
The beneficial effects of the invention are as follows：Active material and thickener are subjected to high-viscosity stirring first, can effectively be prevented
Reunion after conductive agent addition on thickener influences, and shortens mixing time, is easy to slurry sieving；And after conductive agent addition
Whipping process is similarly high-viscosity stirring, and the high shear force of high viscosity state ensure that good rate of dispersion effect so that slurry
Expect that rate of dispersion is more thorough, substantially increase stirring efficiency, effectively shorten mixing time；Also reduce aggregate in slurry
Particle diameter so that slurry, which obtains same viscosity, need to add quantity of solvent reduction a lot.With advantages below：（1）So that water system negative pole
Close slurry mixing time and foreshorten to 4-5h, the technique for carrying out closing slurry again than traditional water system cathode size elder generation glue saves half
Mixing time, improve the operating efficiency that water system cathode size closes slurry；(2) water system cathode size solid content is made to improve to 50%-
55%, solvent usage amount can be reduced and obtain preferably coating drying effect；(3) water system cathode size granularity is decreased to
30-35 μm, granularity is small, improves the uniformity and stability of slurry so that and applying structure is more fine and close, surface area increase,
Improve the electric conductivity of slurry.(4) slurry stand 10h after, slurry without layering, without sedimentation, the stabilization of the rate of dispersion of slurry
Property is good.
Embodiment
With reference to specific embodiment, the invention will be further described.
Embodiment 1：50 parts of Delaniums are added in planetary mixer, add 0.8 part of CMC, revolution speed 20
Rev/min, rate of dispersion is 500 revs/min, mixing time 30 minutes.Then 28 parts are added into planetary mixer again to go
Ionized water, and revolution speed is set as 25 revs/min, rate of dispersion is 1000 revs/min, and mixing time 50 minutes is stirred
Process control slurry temperature is at 25-45 DEG C.Then again into planetary mixer add 7 parts of deionized waters, and set revolution speed as
25 revs/min, rate of dispersion is 1000 revs/min, mixing time 50 minutes.Then 0.6 part is added into planetary mixer again
Super-p, and set revolution speed as 25 revs/min, rate of dispersion is 1000 revs/min, mixing time 60 minutes.Then
2.6 parts of SBR and 11 part of deionized water is added into planetary mixer again, and sets revolution speed as 25 revs/min, disperses speed
Spend for 800 revs/min, mixing time 30 minutes.Then it is 25 revs/min and Chou vacuum Dao≤- 0.09MPa to set revolution speed
Vacuumize 30 minutes.Slurry is made to complete.
Testing size viscosity, solid content, granularity.Slurry viscosity is 1850mPa.s, solid content 52.45%, granularity
For 32 μm.Slurry stand 10h disposed slurries without layering, without sedimentation.
Embodiment 2：47 parts of Delaniums are added in planetary mixer, add 0.9 part of CMC, revolution speed 25
Rev/min, rate of dispersion is 800 revs/min, mixing time 25 minutes.Then 26 parts are added into planetary mixer again to go
Ionized water, and revolution speed is set as 30 revs/min, rate of dispersion is 900 revs/min, mixing time 60 minutes.Then again to
7 parts of deionized waters are added in planetary mixer, and set revolution speed as 20 revs/min, rate of dispersion is 800 revs/min, is stirred
Mix the time 60 minutes.Then 0.5 part of conductive carbon black is added into planetary mixer again, and sets revolution speed as 20 revs/min
Clock, rate of dispersion are 800 revs/min, are stirred 50 minutes.Then 2.8 parts SBR and 15.8 part is added into planetary mixer again to go
Ionized water, and revolution speed is set as 30 revs/min, rate of dispersion is 1000 revs/min, mixing time 40 minutes.Then set
Determine revolution speed for 20 revs/min and Chou vacuum Dao≤- 0.09MPa vacuumize 20 minutes.Slurry is made to complete.
Testing size viscosity, solid content, granularity.Slurry viscosity is 1900mPa.s, solid content 50.13%, granularity
For 32 μm.Slurry stand 10h disposed slurries without layering, without sedimentation.
Embodiment 3：47 parts of Delaniums are added in planetary mixer, add 1.0 parts of CMC；Revolution speed is 23
Rev/min, rate of dispersion is 600 revs/min, is stirred 28 minutes.Then 28 parts of deionization is added into planetary mixer again
Water, and revolution speed is set as 28 revs/min, rate of dispersion is 800 revs/min, is stirred 55 minutes.Then again to planet stirring
9 parts of deionized waters are added in machine, and set revolution speed as 30 revs/min, rate of dispersion is 1200 revs/min, stirs 55 points
Clock, whipping process control slurry temperature at 25-45 DEG C.Then 0.5 part of electrically conductive graphite is added into planetary mixer again, and is set
Revolution speed is determined for 30 revs/min, and rate of dispersion is 1200 revs/min, is stirred 55 minutes.Then add again into planetary mixer
Enter 2.0 parts of SBR and 12.5 part of deionized waters, and set revolution speed as 28 revs/min, rate of dispersion is 900 revs/min, is stirred
Mix 35 minutes.Then revolution speed is set as 23 revs/min and Chou vacuum Dao≤- 0.09MPa vacuumize 25 minutes.Make
Slurry is completed.
Testing size viscosity, solid content, granularity.Slurry viscosity is 1950mPa.s, solid content 50.5%, and granularity is
33µm.Slurry stand 10h disposed slurries without layering, without sedimentation.
Embodiment 4：53 parts of Delaniums are added in planetary mixer, add 0.5 part of CMC；Revolution speed is 25
Rev/min, rate of dispersion is 600 revs/min, is stirred 28 minutes.Then 29 parts of deionization is added into planetary mixer again
Water, and revolution speed is set as 28 revs/min, rate of dispersion is 800 revs/min, is stirred 55 minutes.Then again to planet stirring
7 parts of deionized waters are added in machine, and set revolution speed as 30 revs/min, rate of dispersion is 1200 revs/min, stirs 55 points
Clock, whipping process control slurry temperature at 25-45 DEG C.Then 0.5 part of super-p is added into planetary mixer again, and is set
Revolution speed is determined for 30 revs/min, and rate of dispersion is 1200 revs/min, is stirred 55 minutes.Then add again into planetary mixer
Enter 2.5 parts of SBR and 9 part of deionized waters, and set revolution speed as 26 revs/min, rate of dispersion is 850 revs/min, stirring 38
Minute.Then revolution speed is set as 22 revs/min and Chou vacuum Dao≤- 0.09MPa vacuumize 28 minutes.Make slurry
Complete.
Testing size viscosity, solid content, granularity.Slurry viscosity is 2250mPa.s, solid content 54.8%, and granularity is
33µm.Slurry stand 10h disposed slurries without layering, without sedimentation.
Embodiment 5：50 parts of Delaniums are added in planetary mixer, add 0.6 part of CMC；Revolution speed is 25
Rev/min, rate of dispersion is 800 revs/min, is stirred 28 minutes.Then 30 parts of deionization is added into planetary mixer again
Water, and revolution speed is set as 28 revs/min, rate of dispersion is 800 revs/min, is stirred 55 minutes, whipping process control slurry
Temperature is at 25-45 DEG C.Then 6.5 parts of deionized waters are added into planetary mixer again, and set revolution speed as 30 revs/min
Clock, rate of dispersion are 1200 revs/min, are stirred 55 minutes.Then 0.7 part of super-p is added into planetary mixer again, and
Revolution speed is set as 30 revs/min, rate of dispersion is 1200 revs/min, is stirred 55 minutes.Then again into planetary mixer
3.0 parts of SBR and 13.5 part of deionized waters are added, and set revolution speed as 26 revs/min, rate of dispersion is 900 revs/min,
Stirring 35 minutes.Then revolution speed is set as 23 revs/min and Chou vacuum Dao≤- 0.09MPa vacuumize 25 minutes.System
Make slurry completion.
Testing size viscosity, solid content, granularity.Slurry viscosity is 1750mPa.s, solid content 53.8%, and granularity is
33µm.Slurry stand 10h disposed slurries without layering, without sedimentation.
Embodiment 6：53 parts of Delaniums are added in planetary mixer, add 1.0 parts of CMC；Revolution speed is 23
Rev/min, rate of dispersion is 600 revs/min, is stirred 28 minutes.Then 30 parts of deionization is added into planetary mixer again
Water, and revolution speed is set as 28 revs/min, rate of dispersion is 800 revs/min, is stirred 55 minutes, whipping process control slurry
Temperature is at 25-45 DEG C.Then 7 parts of deionized waters are added into planetary mixer again, and set revolution speed as 30 revs/min,
Rate of dispersion is 1200 revs/min, is stirred 55 minutes.Then 0.5 part of conductive black is added into planetary mixer again, and is set
Revolution speed is determined for 30 revs/min, and rate of dispersion is 1200 revs/min, is stirred 55 minutes.Then add again into planetary mixer
Enter 2.0 parts of SBR and 8.5 part of deionized waters, and set revolution speed as 23 revs/min, rate of dispersion is 900 revs/min, stirring
35 minutes.Then revolution speed is set as 23 revs/min and Chou vacuum Dao≤- 0.09MPa vacuumize 25 minutes.Make slurry
Material is completed.
Testing size viscosity, solid content, granularity.Slurry viscosity is 2150mPa.s, solid content 55.2%, and granularity is
33µm.Slurry stand 10h disposed slurries without layering, without sedimentation.
Claims (3)
- A kind of 1. lithium ion battery cathode slurry preparation method, it is characterised in that：It comprises the following steps：By weight calculating：Active material is Delanium, accounts for 47-53 parts；Thickener is sodium carboxymethylcellulose CMC, is accounted for 0.5-1.0 parts；Conductive agent is conductive carbon black or electrically conductive graphite, accounts for 0.5-0.7 parts；Binding agent is styrene butadiene rubber sbr, accounts for 2.0- 3.0 part；Solvent is deionized water, accounts for 45-50 parts；The thickener of active material, the amount the amount is added in planetary mixer, in 20-25 revs/min of revolution speed Under conditions of clock, 500-800 revs/min of rate of dispersion, stirring 25-30 minutes, which obtain, has added powder；The solvent for accounting for and having added powder proportion 55%-60% is added, in 20-30 revs/min of revolution speed, rate of dispersion Under conditions of 800-1200 revs/min, 50-60 minutes are stirred；The solvent for accounting for and having added powder proportion 13%-18% is added, in 20-30 revs/min of revolution speed, rate of dispersion Under conditions of 800-1200 revs/min, 50-60 minutes are stirred；The conductive agent of the amount is added, in 20-30 revs/min of revolution speed, the bar of 800-1200 revs/min of rate of dispersion Under part, 50-60 minutes are stirred；The binding agent of the amount and the remaining solvent are added, in 25-30 revs/min of revolution speed, rate of dispersion 800- Under conditions of 1000 revs/min, 30-40 minutes are stirred；Continue to stir, under conditions of 20-25 revs/min of revolution speed, carry out vacuumizing stirring, stir 20-30 minutes, system Into slurry.
- 2. lithium ion battery cathode slurry preparation method according to claim 1, it is characterised in that：In step-Stir The control of process slurry temperature is mixed at 25-45 DEG C.
- 3. lithium ion battery cathode slurry preparation method according to claim 1 or 2, it is characterised in that：In stepIn take out Zhen Kong Du≤- 0.09MPa during vacuum stirring.
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| CN106450290B (en) * | 2016-11-15 | 2019-06-18 | 风帆有限责任公司 | One kind can the wide temperature range lithium ion battery conjunction slurry of low temperature charge and discharge and preparation method |
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| CN106611844A (en) * | 2016-12-27 | 2017-05-03 | 天臣新能源研究南京有限公司 | Lithium ion battery anode slurry compounding technology with high efficiency |
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| CN107732142A (en) * | 2017-10-10 | 2018-02-23 | 中航锂电（江苏）有限公司 | A kind of lithium ion battery cathode slurry process for dispersing |
| CN107749460A (en) * | 2017-10-25 | 2018-03-02 | 东莞市久森新能源有限公司 | A kind of method for preparing lithium ion battery cathode slurry |
| CN108169057B (en) * | 2017-12-07 | 2020-05-22 | 惠州拓邦电气技术有限公司 | Lithium ion battery slurry stability testing method and device |
| CN108565393A (en) * | 2018-04-04 | 2018-09-21 | 合肥国轩高科动力能源有限公司 | A kind of conjunction paste-making method of lithium ion battery anode slurry |
| CN108987715A (en) * | 2018-07-23 | 2018-12-11 | 芜湖彰鸿工程技术有限公司 | A kind of lithium ion battery anode slurry and preparation method thereof |
| CN109616610A (en) * | 2018-10-15 | 2019-04-12 | 福建冠城瑞闽新能源科技有限公司 | A kind of lithium ion water-base cathode blank preparation technics without glue |
| CN110071288B (en) * | 2019-04-03 | 2021-03-12 | 昆山聚创新能源科技有限公司 | Negative electrode slurry and preparation method and application thereof |
| CN110518241B (en) * | 2019-08-30 | 2022-02-18 | 江西安驰新能源科技有限公司 | Efficient dispersion process of graphite negative electrode material |
| CN110600674A (en) * | 2019-08-31 | 2019-12-20 | 风帆有限责任公司 | Slurry mixing process of lithium ion battery slurry |
| CN113488606A (en) * | 2021-05-08 | 2021-10-08 | 上海兰钧新能源科技有限公司 | Preparation method of lithium battery electrode slurry |
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| CN102044661A (en) * | 2009-10-23 | 2011-05-04 | 比克国际(天津)有限公司 | Method for preparing lithium ion battery slurry |
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| CN104577071B (en) * | 2015-01-28 | 2016-12-07 | 山东齐星新能源科技有限责任公司 | A kind of lithium ion battery dry powder pulping process |
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| CN102044661A (en) * | 2009-10-23 | 2011-05-04 | 比克国际(天津)有限公司 | Method for preparing lithium ion battery slurry |
| CN102891282A (en) * | 2011-07-21 | 2013-01-23 | 湖北骆驼特种电源有限公司 | Cathode preparation technique of lithium ion battery |
| CN104409736A (en) * | 2014-11-14 | 2015-03-11 | 无锡信大气象传感网科技有限公司 | Lithium ion battery anode material and manufacturing method thereof |
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