CN106848205B - A kind of lithium ion power cell cathode preparation method - Google Patents
A kind of lithium ion power cell cathode preparation method Download PDFInfo
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- CN106848205B CN106848205B CN201611212459.3A CN201611212459A CN106848205B CN 106848205 B CN106848205 B CN 106848205B CN 201611212459 A CN201611212459 A CN 201611212459A CN 106848205 B CN106848205 B CN 106848205B
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The present invention relates to power lithium-ion battery fields, more particularly to a kind of lithium ion power cell cathode preparation method, the following steps are included: first preparing sodium carboxymethylcellulose glue in No. 1 blender, add conductive black and graphite dry powder in No. 2 blenders and mix, then the sodium carboxymethylcellulose glue in No. 1 blender is added in No. 2 blenders；A small amount of alcohol is added and vacuumizes carry out defoaming treatment, adds styrene-butadiene latex and is mixed, last vacuum defoamation, cathode material of lithium-ion power battery needed for being made.The present invention shortens the mixing time of negative electrode slurry, improves the infiltration paintability of negative electrode slurry, achieved the purpose that bubble-free by improving stirring scheme.
Description
Technical field
The present invention relates to power lithium-ion battery fields, and in particular to a kind of lithium ion power cell cathode preparation method.
Background technique
Lithium battery is the green high-capacity environment-protecting battery occurred the 1990s, has operating voltage high, specific energy is big, follows
The advantages that ring service life is long, memory-less effect, quickly-chargeable and non-environmental-pollution is to open starting for energy source of car new era
Machine.But with the continuous deterioration increasingly in short supply and natural environment of global energy, high performance Novel electric can be developed as early as possible
Electrical automobile becomes one of the topic that people are presently the most concerned about.Positive electrode, negative electrode material, electrolysis in lithium ion battery at present
This 4 parts of liquid, diaphragm account for the 85% of lithium ion battery cost in total, and lithium cell cathode material is always to restrict its performance
The key factor further promoted.Negative electrode material is as one important component part of lithium ion battery, it should obtain enough
Pay attention to.Existing cathode dry stirring technique mixing time is longer, and slurry is in coating process, it may appear that several bubbles are existing
As reducing the qualification rate of cathode pole piece.To solve the problems, such as that bubble and mixing time occurs in negative electrode slurry coating process, this
Invention provides a kind of novel cathode dry preparation process.
Summary of the invention
Present invention aim to address above-mentioned the deficiencies in the prior art, provide a kind of lithium ion power cell cathode preparation side
Method.
The present invention is achieved by the following technical solutions:
A kind of lithium ion power cell cathode preparation method, comprising the following steps:
(1) sodium carboxymethylcellulose (CMC) glue is prepared in No. 1 blender；
(2) conductive black (SP) and graphite (C) dry powder are added in No. 2 blenders and mixes；
(3) the sodium carboxymethylcellulose glue prepared in No. 1 blender is added to No. 2 containing conductive black and graphite
In blender and mix；
(4) adding water in containing sodium carboxymethylcellulose glue, conductive black and graphite No. 2 blenders reaches solid content
To 60~65%, stir, and carry out defoaming treatment；
(5) it adds water into step (4) treated No. 2 blenders, solid content is made to be reduced to 42~45%, carry out viscosity
Adjustment, and defoaming treatment is carried out, controlling slurry viscosity is 2200~2800mPas under 26 DEG C of test conditions；
(6) styrene-butadiene latex (SBR) and suitable quantity of water are added step (5) treated in No. 2 blenders and be stirred；
(7) by material vacuum deaeration in step (6) treated No. 2 blenders, slurry viscosity is controlled in 26 DEG C of test-strips
It is 2200~2800mPas, cathode material of lithium-ion power battery needed for preparing under part.
Preferably, step (4) and (5) described defoaming treatment are the alcohol that total stock quality score 0.2%-0.5% is added
Into No. 2 blenders and vacuumize.
Preferably, step (1) the sodium carboxymethylcellulose glue preparation method the following steps are included:
(11) a certain amount of deionized water is added in No. 1 blender, then is uniformly added into a certain amount of carboxymethyl cellulose
Sodium makes the concentration 2.3~2.9% of sodium carboxymethylcellulose；
(12) No. 1 blender that sodium carboxymethylcellulose has been added is stirred 3~10 points with the 38~45rpm of revolving speed that revolves
Clock, then with the 18~25rpm of revolving speed that revolves, 1500~2000rpm of rate of dispersion stirring 5~10 minutes, start to vacuumize, while with
Revolution 15~20rpm of revolving speed, 2500~3500rpm of rate of dispersion are stirred 100~150 minutes；
(13) No. 1 blender is shelved 100~120 minutes, being evacuated to vacuum degree is -0.09~-0.1Mpa.
Preferably, step (2) blending manner be by conductive black and graphite dry powder with the 20~28rpm of revolving speed that revolves,
1000~1500rpm of rate of dispersion is stirred 20~30 minutes.
Preferably, step (3) blending manner the following steps are included:
(31) No. 2 blenders of sodium carboxymethylcellulose glue, conductive black and graphite dry powder will be mixed with the revolving speed that revolves
10~15rpm, 300~600rpm of rate of dispersion are stirred 3~5 minutes, and it is primary to scrape bucket；
(32) continue to stir, be stirred 30~40 minutes with the 25~30rpm of revolving speed that revolves, rate of dispersion 1500-2000rpm,
And it is primary to scrape bucket within every 10~15 minutes.
Preferably, step (4) agitating mode is with the 25~30rpm of revolving speed that revolves, 2000~3200rpm of rate of dispersion
Stirring 30~40 minutes, it is primary to scrape bucket in every 10~15 minutes.
Preferably, step (5) agitating mode is with the 30~40rpm of revolving speed that revolves, 3500~4000rpm of rate of dispersion
Stirring 30~45 minutes, it is primary to scrape bucket in every 10~15 minutes.
Preferably, step (6) agitating mode is with 20~25rpm of revolution speed, 1600~2200rpm of rate of dispersion
Stirring 20~30 minutes.
Preferably, step (7) the material vacuum deaeration is by No. 2 blenders with 15~20rpm of revolution speed reversion, together
When vacuumize 30 minutes with up to vacuum degree be -0.09~-0.1Mpa, discharging.
The beneficial effects of the present invention are:
The method of the present invention will be significantly shorter than original technique mixing time in mixing time, about shorten 20%~30%
Time.The glue time is without calculating in mixing time, because one time glue can supply multiple stirrings in general production process
Machine uses.
The method of the present invention has begun during CMC is mixed stirring with water and vacuumizes, in stirring subsequent in this way, glue
Interior number of bubbles significantly reduces, and CMC glue is more uniform, improves mixing quality.
The method of the present invention is required to that a small amount of alcohol is added and is vacuumized since step (4), and alcohol and vacuum action are
Bubble to be eliminated, number of bubbles in slurry is reduced, homogenization effect improves, and in subsequent work step, such as is coated with, and film-making qualification rate improves,
Reduce certain material cost.
In original process, CMC is directly added into blender as powder, is stirred mixing with graphite C and conductive black SP；
And in the present invention, it is that CMC and water are first mixed and made into uniform glue, so that CMC more uniformly is dispersed to as thickener
In graphite and conductive agent.
The present invention by improve stirring scheme, shorten the mixing time of negative electrode slurry, slurry wellability and mobility compared with
It is good, the infiltration paintability of negative electrode slurry is improved, copper foil surface can be uniformly coated on, has achieved the purpose that bubble-free,
Coating thickness is able to maintain preferable consistency.
Detailed description of the invention
Fig. 1 is that the negative electrode slurry that the present invention prepares coats effect picture；
Fig. 2 is that the negative electrode slurry that original process are prepared coats effect picture；
Fig. 3 is picture of the negative electrode material of the invention prepared under 100 power microscopes；
Fig. 4 is picture of the negative electrode material prepared of original process under 100 power microscopes；
Fig. 5 is picture of the negative electrode material of the invention prepared under 400 power microscopes；
Fig. 6 is picture of the negative electrode material prepared of original process under 400 power microscopes.
Specific embodiment
To be best understood from the present invention, below with reference to examples and drawings, the invention will be further described, following embodiment
It is only that the present invention will be described rather than is limited to it.
Embodiment one
1, glue.A certain amount of deionized water is first added in No. 1 blender, then is uniformly added into a certain amount of CMC powder,
Make CMC gelatin concentration 2.3%.To revolve, revolving speed 43rpm is stirred 5 minutes；Again with the revolving speed 20rpm, rate of dispersion of revolving
1800rpm is stirred 10 minutes；Then with the revolving speed 15rpm that revolves, rate of dispersion 3000rpm stirring 120 minutes.
2, it shelves 120 minutes, No. 1 blender is evacuated to -0.1Mpa.
3, add graphite and sp powder to No. 2 blenders, it is dry-mixed.With the revolving speed 20rpm that revolves, rate of dispersion 1200rpm stirring
25 minutes.
4, No. 2 blenders are added in the CMC glue by No. 1 blender preparation, with the revolving speed 10rpm, rate of dispersion of revolving
500rpm is stirred 3 minutes, and it is primary to scrape bucket；Continue to stir, stirs 30 points with the revolving speed 30rpm that revolves, rate of dispersion 1500rpm
It is primary to scrape bucket in every 10 minutes for clock.
5, No. 2 blenders are added water to, with the revolving speed 30rpm that revolves, rate of dispersion 2000rpm stirring 30 minutes, every 10 minutes
It is primary to scrape bucket, while a small amount of alcohol is added and starts to vacuumize.
6, it adds water to No. 2 blenders and carries out viscosity adjustment, with the revolving speed 40rpm that revolves, rate of dispersion 3500rpm stirring 30
Minute, it is primary to scrape bucket within every 10 minutes, while a small amount of alcohol is added and starts to vacuumize, controls slurry viscosity in 26 DEG C of test conditions
It is down 2200~2800mPas.
7, add SBR and water to No. 2 blenders, with revolution speed 25rpm, rate of dispersion 1600rpm stirring 25 minutes.
8, vacuum defoamation.No. 2 blenders are evacuated to -0.1Mpa, 30 minutes, control was starched with revolution speed 20rpm reversion
Expect that viscosity is 2200~2800mPas, discharging under 26 DEG C of test conditions.
Wherein, the material content in negative electrode slurry is as shown in the table.
| Name of material | Graphite | CMC | SP | SBR |
| Proportion | 94.45% | 1.35% | 1.70% | 2.50% |
| Quality (g) | 4500 | 65.0 | 81 | 119 |
The negative electrode slurry prepared is coated on copper foil, effect is as shown in Figure 1.
Embodiment two
1, glue.A certain amount of deionized water is first added in No. 1 blender, then is uniformly added into a certain amount of CMC powder,
Make CMC gelatin concentration 2.5%.To revolve, revolving speed 38rpm is stirred 3 minutes；Again with the revolving speed 18rpm, rate of dispersion of revolving
1500rpm is stirred 5 minutes；Then with the revolving speed 18rpm that revolves, rate of dispersion 2500rpm stirring 100 minutes.
2, it shelves 100 minutes, No. 1 blender is evacuated to -0.15Mpa.
3, add graphite and sp powder to No. 2 blenders, it is dry-mixed.With the revolving speed 25rpm that revolves, rate of dispersion 1000rpm stirring
20 minutes.
4, No. 2 blenders are added in the CMC glue by No. 1 blender preparation, with the revolving speed 12rpm, rate of dispersion of revolving
300rpm is stirred 4 minutes, and it is primary to scrape bucket；Continue to stir, stirs 35 points with the revolving speed 25rpm that revolves, rate of dispersion 1800rpm
It is primary to scrape bucket in every 10 minutes for clock.
5, No. 2 blenders are added water to, with the revolving speed 25rpm that revolves, rate of dispersion 2600rpm stirring 35 minutes, every 10 minutes
It is primary to scrape bucket, while a small amount of alcohol is added and starts to vacuumize.
6, it adds water to No. 2 blenders and carries out viscosity adjustment, with the revolving speed 30rpm that revolves, rate of dispersion 3800rpm stirring 38
Minute, it is primary to scrape bucket within every 10 minutes, while a small amount of alcohol is added and starts to vacuumize, controls slurry viscosity in 26 DEG C of test conditions
It is down 2200~2800mPas.
7, add SBR and water to No. 2 blenders, with revolution speed 20rpm, rate of dispersion 1900rpm stirring 20 minutes.
8, vacuum defoamation.No. 2 blenders are evacuated to -0.15Mpa, 35 minutes, are controlled with revolution speed 15rpm reversion
Slurry viscosity is 2200~2800mPas, discharging under 26 DEG C of test conditions.
Wherein, the material content in negative electrode slurry is as shown in the table.
| Name of material | Graphite | CMC | SP | SBR |
| Proportion | 93.5% | 1.85% | 2% | 2.65% |
| Quality (g) | 4455 | 88.2 | 95 | 126 |
Embodiment three
1, glue.A certain amount of deionized water is first added in No. 1 blender, then is uniformly added into a certain amount of CMC powder,
Make CMC gelatin concentration 2.9%.To revolve, revolving speed 45rpm is stirred 10 minutes；Again with the revolving speed 25rpm, rate of dispersion of revolving
2000rpm is stirred 8 minutes；Then with the revolving speed 20rpm that revolves, rate of dispersion 3500rpm stirring 150 minutes.
2, it shelves 110 minutes, No. 1 blender is evacuated to -0.2Mpa.
3, add graphite and sp powder to No. 2 blenders, it is dry-mixed.With the revolving speed 28rpm that revolves, rate of dispersion 1500rpm stirring
30 minutes.
4, No. 2 blenders are added in the CMC glue by No. 1 blender preparation, with the revolving speed 15rpm, rate of dispersion of revolving
600rpm is stirred 5 minutes, and it is primary to scrape bucket；Continue to stir, stirs 40 points with the revolving speed 28rpm that revolves, rate of dispersion 2000rpm
It is primary to scrape bucket in every 10 minutes for clock.
5, No. 2 blenders are added water to, with the revolving speed 28rpm that revolves, rate of dispersion 3200rpm stirring 40 minutes, every 10 minutes
It is primary to scrape bucket, while a small amount of alcohol is added and starts to vacuumize.
6, it adds water to No. 2 blenders and carries out viscosity adjustment, with the revolving speed 35rpm that revolves, rate of dispersion 4000rpm stirring 45
Minute, it is primary to scrape bucket within every 10 minutes, while a small amount of alcohol is added and starts to vacuumize, controls slurry viscosity in 26 DEG C of test conditions
It is down 2200~2800mPas.
7, add SBR and water to No. 2 blenders, with revolution speed 23rpm, rate of dispersion 2200rpm stirring 30 minutes.
8, vacuum defoamation.No. 2 blenders are evacuated to -0.2Mpa, 40 minutes, control was starched with revolution speed 18rpm reversion
Expect that viscosity is 2200~2800mPas, discharging under 26 DEG C of test conditions.
Wherein, the material content in negative electrode slurry is as shown in the table.
| Name of material | Graphite | CMC | SP | SBR |
| Proportion | 95.5% | 0.85% | 1.65% | 2% |
| Quality (g) | 4550 | 41 | 79 | 95 |
Comparative example one
1. adding graphite and sp powder to blender, dry powder stirring.With the revolving speed 20rpm that revolves, rate of dispersion 1000rpm stirring
20 minutes.
2. adding water in blender, infiltration stirring.With the revolving speed 20rpm that revolves, rate of dispersion 2000rpm stir 40min, 15
It is primary that minute scrapes bucket.
3. CMC powder is added to stir into blender.10min is stirred with revolution speed 10rpm；Then with revolution speed
10rpm, rate of dispersion 2000rpm stir 5min.
4. adding water to blender, pureed stirring is carried out.40min is stirred with the revolving speed 15rpm that revolves, rate of dispersion 2000rpm,
It is primary that bucket is scraped after 10min.
5. adding water to blender, high-viscosity stirring is carried out.With the revolving speed 15rpm that revolves, rate of dispersion 2000rpm stirring
It is primary that bucket is scraped after 90min, 30min.
6. adding water to blender carries out viscosity adjustment.With the revolving speed 15rpm that revolves, rate of dispersion 2000rpm stirring, control slurry
Expect viscosity in 2200-2800mPa.s.
7. adding SBR and suitable quantity of water to blender.20min is stirred with revolution speed 10rpm, rate of dispersion 1000rpm.
8. vacuum defoamation.Blender reversion, revolution speed 15rpm are evacuated to -0.1Mpa, 30 minutes, discharge.It surveys viscous
Degree, tested viscosity control is in 2200-2800mpa.s at 26 DEG C.
Wherein, the material content in negative electrode slurry is as shown in the table.
| Name of material | Graphite | CMC | SP | SBR |
| Proportion | 94.45% | 1.35% | 1.70% | 2.50% |
| Quality (g) | 4500 | 65.0 | 81 | 119 |
The negative electrode slurry prepared is coated on copper foil, effect is as shown in Figure 2.
Comparative example two
1. adding graphite and sp powder to blender, dry powder stirring.With the revolving speed 25rpm that revolves, rate of dispersion 1200rpm stirring
25 minutes.
2. adding water in blender, infiltration stirring.With the revolving speed 25rpm that revolves, rate of dispersion 2600rpm stir 50min, 15
It is primary that minute scrapes bucket.
3. CMC powder is added to stir into blender.15min is stirred with revolution speed 12rpm；Then with revolution speed
15rpm, rate of dispersion 2500rpm stir 8min.
4. adding water to blender, pureed stirring is carried out.50min is stirred with the revolving speed 18rpm that revolves, rate of dispersion 2500rpm,
It is primary that bucket is scraped after 10min.
5. adding water to blender, high-viscosity stirring is carried out.With the revolving speed 18rpm that revolves, rate of dispersion 2500rpm stirring
It is primary that bucket is scraped after 95min, 30min.
6. adding water to blender carries out viscosity adjustment.With the revolving speed 18rpm that revolves, rate of dispersion 2200rpm stirring, control slurry
Expect viscosity in 2200-2800mPa.s.
7. adding SBR and suitable quantity of water to blender.25min is stirred with revolution speed 15rpm, rate of dispersion 1100rpm.
8. vacuum defoamation.Blender reversion, revolution speed 18rpm are evacuated to -0.15Mpa, 35 minutes, discharge.It surveys viscous
Degree, tested viscosity control is in 2200-2800mpa.s at 26 DEG C.
Wherein, the material content in negative electrode slurry is as shown in the table.
| Name of material | Graphite | CMC | SP | SBR |
| Proportion | 93.5% | 1.85% | 2% | 2.65% |
| Quality (g) | 4455 | 88.2 | 95 | 126 |
Comparative example three
1. adding graphite and sp powder to blender, dry powder stirring.With the revolving speed 30rpm that revolves, rate of dispersion 1500rpm stirring
30 minutes.
2. adding water in blender, infiltration stirring.With the revolving speed 30rpm that revolves, rate of dispersion 3200rpm stir 60min, 15
It is primary that minute scrapes bucket.
3. CMC powder is added to stir into blender.20min is stirred with revolution speed 15rpm；Then with revolution speed
20rpm, rate of dispersion 3000rpm stir 10min.
4. adding water to blender, pureed stirring is carried out.60min is stirred with the revolving speed 20rpm that revolves, rate of dispersion 3000rpm,
It is primary that bucket is scraped after 10min.
5. adding water to blender, high-viscosity stirring is carried out.With the revolving speed 20rpm that revolves, rate of dispersion 3000rpm stirring
It is primary that bucket is scraped after 100min, 30min.
6. adding water to blender carries out viscosity adjustment.With the revolving speed 20rpm that revolves, rate of dispersion 2500rpm stirring, control slurry
Expect viscosity in 2200-2800mPa.s.
7. adding SBR and suitable quantity of water to blender.30min is stirred with revolution speed 20rpm, rate of dispersion 1200rpm.
8. vacuum defoamation.Blender reversion, revolution speed 20rpm are evacuated to -0.2Mpa, 40 minutes, discharge.It surveys viscous
Degree, tested viscosity control is in 2200-2800mpa.s at 26 DEG C.
Wherein, the material content in negative electrode slurry is as shown in the table.
| Name of material | Graphite | CMC | SP | SBR |
| Proportion | 95.5% | 0.85% | 1.65% | 2% |
| Quality (g) | 4550 | 41 | 79 | 95 |
As shown, the negative electrode slurry that Fig. 1 is embodiment preparation is coated with schematic diagram, the wellability and mobility of slurry compared with
It is good, it can be uniformly coated on copper foil surface, without bubble, coating thickness is able to maintain preferable consistency；Fig. 2 is comparative example
The negative electrode slurry of preparation is coated with schematic diagram, and since slurry wellability is poor, slurry fails to be uniformly coated in coating process
Copper foil surface, negative electrode slurry and copper foil gap location will form bubble.
If Fig. 3~6 are respectively the picture of the power battery cathode material of the invention prepared with original process under the microscope.Slurry
The lower solvent of surface tension (i.e. alcohol) is added in material can effectively improve water to the wetness degree of graphite material；CMC simultaneously
It is the dispersing agent with surface-active, guarantees the emulsion dispersion to the particle of low surface tension, improves the dispersion of graphite in water
Ability, i.e. wetness degree of the raising water to graphite material.When the surface tension of liquid is lower than the critical surface tension of solid, then
(such as Fig. 3 and 5) arbitrarily can be sprawled and be soaked to liquid in the surface of solids；Conversely, liquid in the surface of solids due to that cannot form
Continuous drop, and can not sprawl and soak solid, when coating, may cause shrinkage cavity and (such as Fig. 4 and 6) occur.
Selection is divided to two to three steps to add water to be stirred respectively, it is therefore an objective to improve water to the wetting property of graphite.Due to cathode
Slurry final molding solid content disposably adds water and stirs about in 40%-45%, and separation of solid and liquid situation can be made excessively obvious,
Part graphitic molecules are caused to fail to be infiltrated by hydrone.There are the bad phenomenons such as bubble shrinkage cavity when to be coated with.
Embodiment described above is only that preferred embodiments of the present invention will be described, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made, should fall within the scope of protection determined by the claims of the present invention.
Claims (8)
1. a kind of lithium ion power cell cathode slurry preparation method, which comprises the following steps:
(1) sodium carboxymethylcellulose glue is prepared in No. 1 blender；
(2) conductive black and graphite dry powder are added in No. 2 blenders and mixes；
(3) the sodium carboxymethylcellulose glue prepared in No. 1 blender is added to No. 2 stirrings containing conductive black and graphite
In machine and mix；
(4) adding water in containing sodium carboxymethylcellulose glue, conductive black and graphite No. 2 blenders makes solid content reach 60
~ 65%, stirring, and carry out defoaming treatment；
(5) it adds water into step (4) treated No. 2 blenders, solid content is made to be reduced to 42 ~ 45%, carry out viscosity adjustment, and
Defoaming treatment is carried out, controlling slurry viscosity is 2200 ~ 2800 mPas under 26 DEG C of test conditions；
(6) styrene-butadiene latex and suitable quantity of water are added step (5) treated in No. 2 blenders and be stirred；
(7) by material vacuum deaeration in step (6) treated No. 2 blenders, slurry viscosity is controlled under 26 DEG C of test conditions
For 2200 ~ 2800 mPas, cathode material of lithium-ion power battery needed for preparing；
Step (4) and (5) described defoaming treatment are that the alcohol of total stock quality score 0.2%-0.5% is added into No. 2 blenders
And it vacuumizes.
2. a kind of lithium ion power cell cathode slurry preparation method according to claim 1, which is characterized in that step
(1) the sodium carboxymethylcellulose glue preparation method the following steps are included:
(11) a certain amount of deionized water is added in No. 1 blender, then is uniformly added into a certain amount of sodium carboxymethylcellulose, makes
The concentration of sodium carboxymethylcellulose is 2.3 ~ 2.9%；
(12) No. 1 blender that sodium carboxymethylcellulose has been added is stirred 3 ~ 10 minutes with 38 ~ 45 rpm of revolving speed that revolves, then with
Revolution 18 ~ 25 rpm of revolving speed, 1500 ~ 2000 rpm of rate of dispersion are stirred 5 ~ 10 minutes, start to vacuumize, while with the revolving speed that revolves
15 ~ 20 rpm, 2500 ~ 3500 rpm of rate of dispersion are stirred 100 ~ 150 minutes；
(13) No. 1 blender is shelved 100 ~ 120 minutes, being evacuated to vacuum degree is -0.09 ~ -0.1 Mpa.
3. a kind of lithium ion power cell cathode slurry preparation method according to claim 1, which is characterized in that step
(2) blending manner is by conductive black and graphite dry powder with 20 ~ 28 rpm of revolving speed, rate of dispersion 1000 ~ 1500 of revolving
Rpm is stirred 20 ~ 30 minutes.
4. a kind of lithium ion power cell cathode slurry preparation method according to claim 1, which is characterized in that step
(3) blending manner the following steps are included:
(31) No. 2 blenders of sodium carboxymethylcellulose glue, conductive black and graphite dry powder will be mixed with the revolving speed 10 ~ 15 that revolves
Rpm, 300 ~ 600 rpm of rate of dispersion are stirred 3 ~ 5 minutes, and it is primary to scrape bucket；
(32) continue to stir, to revolve, 25 ~ 30 rpm of revolving speed, rate of dispersion 1500-2000 rpm are stirred 30 ~ 40 minutes, and
It is primary to scrape bucket within every 10 ~ 15 minutes.
5. a kind of lithium ion power cell cathode slurry preparation method according to claim 1, which is characterized in that step
(4) agitating mode be with 25 ~ 30 rpm of revolving speed that revolves, 2000 ~ 3200 rpm of rate of dispersion stirring 30 ~ 40 minutes, every 10 ~
It is primary to scrape bucket within 15 minutes.
6. a kind of lithium ion power cell cathode slurry preparation method according to claim 1, which is characterized in that step
(5) agitating mode be with 30 ~ 40 rpm of revolving speed that revolves, 3500 ~ 4000 rpm of rate of dispersion stirring 30 ~ 45 minutes, every 10 ~
It is primary to scrape bucket within 15 minutes.
7. a kind of lithium ion power cell cathode slurry preparation method according to claim 1, which is characterized in that step
(6) agitating mode is with 20 ~ 25 rpm of revolution speed, 1600 ~ 2200 rpm of rate of dispersion stirring 20 ~ 30 minutes.
8. a kind of lithium ion power cell cathode slurry preparation method according to claim 1, which is characterized in that step
(7) the material vacuum deaeration is by No. 2 blenders with 15 ~ 20 rpm of revolution speed reversion, while being vacuumized 30 minutes or more
It is -0.09 ~ -0.1 Mpa, discharging to vacuum degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611212459.3A CN106848205B (en) | 2016-12-25 | 2016-12-25 | A kind of lithium ion power cell cathode preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611212459.3A CN106848205B (en) | 2016-12-25 | 2016-12-25 | A kind of lithium ion power cell cathode preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106848205A CN106848205A (en) | 2017-06-13 |
| CN106848205B true CN106848205B (en) | 2019-08-09 |
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| CN107403914B (en) * | 2017-07-03 | 2020-08-18 | 江西安驰新能源科技有限公司 | Dry mixing process of artificial graphite cathode slurry |
| CN108281617A (en) * | 2018-02-05 | 2018-07-13 | 北京国能电池科技股份有限公司 | Negative electrode slurry and preparation method thereof and purposes |
| CN110311094A (en) * | 2018-03-20 | 2019-10-08 | 安徽瑞科玛电池有限公司 | A kind of lithium cell cathode material preparation process |
| CN108615889A (en) * | 2018-05-11 | 2018-10-02 | 合肥国轩高科动力能源有限公司 | Single composite graphite particle slurry combining method for lithium ion battery |
| CN109192923B (en) * | 2018-09-25 | 2021-09-14 | 清华大学 | Preparation method of lithium ion battery negative electrode conductive slurry |
| CN109524625A (en) * | 2018-10-25 | 2019-03-26 | 超威电源有限公司 | A kind of cathode mixing paste method |
| CN110459410A (en) * | 2019-07-24 | 2019-11-15 | 中国科学院山西煤炭化学研究所 | A kind of preparation method of super capacitor slurry and its supercapacitor prepared using super capacitor slurry |
| CN110534695A (en) * | 2019-08-30 | 2019-12-03 | 江西安驰新能源科技有限公司 | A kind of lithium ion cell positive slurry-stirring process |
| CN112755872A (en) * | 2019-11-05 | 2021-05-07 | 东莞市沃泰通新能源有限公司 | Preparation method of battery cathode slurry |
| CN112072064A (en) * | 2020-09-18 | 2020-12-11 | 天科新能源有限责任公司 | Method for improving stability and dispersibility of lithium ion battery cathode slurry |
| CN112133911A (en) * | 2020-10-09 | 2020-12-25 | 浙江锋锂新能源科技有限公司 | Lithium ion battery cathode slurry and preparation method thereof |
| CN113346083A (en) * | 2021-05-31 | 2021-09-03 | 湖北亿纬动力有限公司 | Negative electrode slurry and preparation method and application thereof |
| CN113871622A (en) * | 2021-09-15 | 2021-12-31 | 惠州赣锋锂电科技有限公司 | Binder for lithium ion battery cathode, cathode slurry using same and preparation method thereof |
| CN114300643B (en) * | 2022-01-17 | 2022-08-30 | 深圳光宇电源科技有限公司 | Method for removing bubbles of negative electrode of lithium battery and improving coating dark spots and exposed foil of negative electrode |
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