CN106848205A - 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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- CN106848205A CN106848205A CN201611212459.3A CN201611212459A CN106848205A CN 106848205 A CN106848205 A CN 106848205A CN 201611212459 A CN201611212459 A CN 201611212459A CN 106848205 A CN106848205 A CN 106848205A
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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
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- H01M4/04—Processes of manufacture in general
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- 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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Abstract
The present invention relates to power lithium-ion battery field, and in particular to a kind of lithium ion power cell cathode preparation method, comprise the following steps：Sodium carboxymethylcellulose glue is first prepared in No. 1 mixer, conductive black and graphite dry powder is added in No. 2 mixers and is mixed, then add in No. 2 mixers the sodium carboxymethylcellulose glue in No. 1 mixer；Adding a small amount of alcohol and vacuumizing carries out defoaming treatment, adds styrene-butadiene latex and is mixed, last vacuum defoamation, cathode material of lithium-ion power battery needed for being obtained.The present invention shortens the mixing time of cathode size by improving stirring scheme, improves the infiltration paintability of cathode size, has reached the purpose of bubble-free.
Description
Technical field
The present invention relates to power lithium-ion battery field, and in particular to a kind of lithium ion power cell cathode preparation method.
Background technology
Lithium battery is the green high-capacity environment-protecting battery that the nineties in 20th century occurs, high with operating voltage, and specific energy is big, follows
The advantages of ring long lifespan, memory-less effect, quickly-chargeable and non-environmental-pollution, be to open starting for energy source of car New Times
Machine.But with the continuous deterioration increasingly in short supply and natural environment of global energy, can as early as possible develop high performance Novel electric
Electrical automobile turns into one of topic that people are presently the most concerned about.Positive electrode, negative material, electrolysis in current lithium ion battery
This 4 parts of liquid, barrier film account for the 85% of lithium ion battery cost altogether, and lithium cell cathode material is always to restrict its performance
The key factor for further being lifted.Negative material is used as one important part of lithium ion battery, it should obtain enough
Pay attention to.Existing negative pole dry stirring technique mixing time is more long, and slurry is in coating process, it may appear that some bubbles show
As reducing the qualification rate of cathode pole piece.To solve the problems, such as that bubble and mixing time occurs in cathode size coating process, this
Invention provides a kind of new negative pole dry preparation process.
The content of the invention
Present invention aim to address above-mentioned the deficiencies in the prior art, there is provided 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, comprises the following steps：
(1) sodium carboxymethylcellulose (CMC) glue is prepared in No. 1 mixer；
(2) conductive black (SP) and graphite (C) dry powder are added in No. 2 mixers and is mixed；
(3) the sodium carboxymethylcellulose glue that will be prepared in No. 1 mixer adds No. 2 containing conductive black and graphite
In mixer and mix；
(4) adding water to reach solid content in containing sodium carboxymethylcellulose glue, conductive black and graphite No. 2 mixers
To 60~65%, stir, and carry out defoaming treatment；
(5) add water in No. 2 mixers to step (4) treatment, solid content is reduced to 42~45%, carry out viscosity
Adjustment, and defoaming treatment is carried out, control slurry viscosity is 2200~2800mPas under 26 DEG C of test conditions；
(6) it is stirred in styrene-butadiene latex (SBR) and suitable quantity of water being added into No. 2 mixers after step (5) treatment；
(7) by material vacuum deaeration in No. 2 mixers after step (6) treatment, control slurry viscosity is 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 is the alcohol for adding total stock quality fraction 0.2%-0.5%
To in No. 2 mixers and vacuumize.
Preferably, the preparation method of step (1) the sodium carboxymethylcellulose glue is comprised the following steps：
(11) a certain amount of deionized water is added in No. 1 mixer, then is uniformly added into a certain amount of carboxymethylcellulose calcium
Sodium, the concentration for making sodium carboxymethylcellulose is 2.3~2.9%；
(12) No. 1 mixer of sodium carboxymethylcellulose will have been added and has stirred 3~10 points with the 38~45rpm of rotating speed that revolves round the sun
Clock, then stirred 5~10 minutes with the 18~25rpm of rotating speed that revolves round the sun, 1500~2000rpm of rate of dispersion, start to vacuumize, while with
15~20rpm of revolution rotating speed, 2500~3500rpm of rate of dispersion are stirred 100~150 minutes；
(13) No. 1 mixer is shelved 100~120 minutes, is evacuated to vacuum for -0.09~-0.1Mpa.
Preferably, step (2) described blending manner be by conductive black and graphite dry powder with the 20~28rpm of rotating speed that revolves round the sun,
1000~1500rpm of rate of dispersion is stirred 20~30 minutes.
Preferably, step (3) described blending manner is comprised the following steps：
(31) No. 2 mixers of sodium carboxymethylcellulose glue, conductive black and graphite dry powder will be mixed with the rotating speed that revolves round the sun
10~15rpm, 300~600rpm of rate of dispersion are stirred 3~5 minutes, and scrape bucket once；
(32) continue to stir, stirred 30~40 minutes with the 25~30rpm of rotating speed that revolves round the sun, rate of dispersion 1500-2000rpm,
And scrape bucket once within every 10~15 minutes.
Preferably, step (4) described agitating mode is with the 25~30rpm of rotating speed that revolves round the sun, 2000~3200rpm of rate of dispersion
Stirring 30~40 minutes, scrapes bucket once in every 10~15 minutes.
Preferably, step (5) described agitating mode is with the 30~40rpm of rotating speed that revolves round the sun, 3500~4000rpm of rate of dispersion
Stirring 30~45 minutes, scrapes bucket once in every 10~15 minutes.
Preferably, step (6) described 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 that No. 2 mixers are inverted with 15~20rpm of revolution speed, together
When vacuumize 30 minutes with up to vacuum be -0.09~-0.1Mpa, discharging.
The beneficial effects of the present invention are：
The inventive method 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 in general production process, one time glue can supply multiple stirrings
Machine is used.
The inventive method has begun to vacuumize during CMC is mixed into stirring with water, in so follow-up stirring, glue
Interior number of bubbles is significantly reduced, and CMC glues are more uniformly distributed, and improves mixing quality.
The inventive method is required to add a small amount of alcohol and vacuumize since step (4), and alcohol and vacuum action are
Bubble is eliminated, number of bubbles in slurry is reduced, homogenization effect is improved, in follow-up work step, for example, is coated with, and film-making qualification rate is improved,
Reduce certain material cost.
In former technique, CMC is directly added into mixer as powder, and mixing is stirred with graphite C and conductive black SP；
And be that CMC and water are first mixed and made into uniform glue in the present invention so that CMC is dispersed to being more uniformly distributed as thickener
In graphite and conductive agent.
The present invention shortens the mixing time of cathode size by improving stirring scheme, slurry wellability and mobility compared with
It is good, the infiltration paintability of cathode size is improve, copper foil surface can be uniformly coated on, the purpose of bubble-free has been reached,
Coating thickness can keep preferable uniformity.
Brief description of the drawings
Fig. 1 is the cathode size coating design sketch that the present invention is prepared；
Fig. 2 is the cathode size coating design sketch that former technique is prepared；
Fig. 3 is picture of the negative material prepared of the invention under 100 power microscopes；
Fig. 4 is picture of the negative material prepared of former technique under 100 power microscopes；
Fig. 5 is picture of the negative material prepared of the invention under 400 power microscopes；
Fig. 6 is picture of the negative material prepared of former technique under 400 power microscopes.
Specific embodiment
To be best understood from the present invention, with reference to embodiment and accompanying drawing, the invention will be further described, following examples
Only it is that the present invention will be described rather than it is limited.
Embodiment one
1st, glue.A certain amount of deionized water is first added in No. 1 mixer, then is uniformly added into a certain amount of CMC powders,
CMC gelatin concentrations are made to be 2.3%.To revolve round the sun, rotating speed 43rpm is stirred 5 minutes；Again with rotating speed 20rpm, the rate of dispersion of revolving round the sun
1800rpm is stirred 10 minutes；Then stirred 120 minutes with the rotating speed 15rpm that revolves round the sun, rate of dispersion 3000rpm.
2nd, shelve 120 minutes, No. 1 mixer is evacuated to -0.1Mpa.
3rd, graphite and sp powders are added to No. 2 mixers, it is dry-mixed.Stirred with the rotating speed 20rpm that revolves round the sun, rate of dispersion 1200rpm
25 minutes.
4th, the CMC glues for preparing No. 1 mixer add No. 2 mixers, with rotating speed 10rpm, the rate of dispersion of revolving round the sun
500rpm is stirred 3 minutes, and scrapes bucket once；Continue to stir, 30 points are stirred with the rotating speed 30rpm that revolves round the sun, rate of dispersion 1500rpm
Clock, scrapes bucket once in every 10 minutes.
5th, No. 2 mixers are added water to, is stirred 30 minutes, every 10 minutes with the rotating speed 30rpm that revolves round the sun, rate of dispersion 2000rpm
Bucket is scraped once, while adding a small amount of alcohol and starting to vacuumize.
6th, adding water to No. 2 mixers carries out viscosity adjustment, and 30 are stirred with the rotating speed 40rpm that revolves round the sun, rate of dispersion 3500rpm
Minute, scrape bucket once within every 10 minutes, while adding a small amount of alcohol and starting to vacuumize, control slurry viscosity is in 26 DEG C of test conditions
It is down 2200~2800mPas.
7th, add SBR and water to No. 2 mixers, stirred 25 minutes with revolution speed 25rpm, rate of dispersion 1600rpm.
8th, vacuum defoamation.No. 2 mixers are inverted with revolution speed 20rpm, are evacuated to -0.1Mpa, 30 minutes, control slurry
Material viscosity is 2200~2800mPas, discharging under 26 DEG C of test conditions.
Wherein, the material content in cathode size is as shown in the table.
| Name of material | Graphite | CMC | SP | SBR |
| Proportioning | 94.45% | 1.35% | 1.70% | 2.50% |
| Quality (g) | 4500 | 65.0 | 81 | 119 |
The cathode size that will be prepared is coated on Copper Foil, and effect is as shown in Figure 1.
Embodiment two
1st, glue.A certain amount of deionized water is first added in No. 1 mixer, then is uniformly added into a certain amount of CMC powders,
CMC gelatin concentrations are made to be 2.5%.To revolve round the sun, rotating speed 38rpm is stirred 3 minutes；Again with rotating speed 18rpm, the rate of dispersion of revolving round the sun
1500rpm is stirred 5 minutes；Then stirred 100 minutes with the rotating speed 18rpm that revolves round the sun, rate of dispersion 2500rpm.
2nd, shelve 100 minutes, No. 1 mixer is evacuated to -0.15Mpa.
3rd, graphite and sp powders are added to No. 2 mixers, it is dry-mixed.Stirred with the rotating speed 25rpm that revolves round the sun, rate of dispersion 1000rpm
20 minutes.
4th, the CMC glues for preparing No. 1 mixer add No. 2 mixers, with rotating speed 12rpm, the rate of dispersion of revolving round the sun
300rpm is stirred 4 minutes, and scrapes bucket once；Continue to stir, 35 points are stirred with the rotating speed 25rpm that revolves round the sun, rate of dispersion 1800rpm
Clock, scrapes bucket once in every 10 minutes.
5th, No. 2 mixers are added water to, is stirred 35 minutes, every 10 minutes with the rotating speed 25rpm that revolves round the sun, rate of dispersion 2600rpm
Bucket is scraped once, while adding a small amount of alcohol and starting to vacuumize.
6th, adding water to No. 2 mixers carries out viscosity adjustment, and 38 are stirred with the rotating speed 30rpm that revolves round the sun, rate of dispersion 3800rpm
Minute, scrape bucket once within every 10 minutes, while adding a small amount of alcohol and starting to vacuumize, control slurry viscosity is in 26 DEG C of test conditions
It is down 2200~2800mPas.
7th, add SBR and water to No. 2 mixers, stirred 20 minutes with revolution speed 20rpm, rate of dispersion 1900rpm.
8th, vacuum defoamation.No. 2 mixers are inverted with revolution speed 15rpm, are evacuated to -0.15Mpa, 35 minutes, control
Slurry viscosity is 2200~2800mPas, discharging under 26 DEG C of test conditions.
Wherein, the material content in cathode size is as shown in the table.
| Name of material | Graphite | CMC | SP | SBR |
| Proportioning | 93.5% | 1.85% | 2% | 2.65% |
| Quality (g) | 4455 | 88.2 | 95 | 126 |
Embodiment three
1st, glue.A certain amount of deionized water is first added in No. 1 mixer, then is uniformly added into a certain amount of CMC powders,
CMC gelatin concentrations are made to be 2.9%.To revolve round the sun, rotating speed 45rpm is stirred 10 minutes；Again with rotating speed 25rpm, the rate of dispersion of revolving round the sun
2000rpm is stirred 8 minutes；Then stirred 150 minutes with the rotating speed 20rpm that revolves round the sun, rate of dispersion 3500rpm.
2nd, shelve 110 minutes, No. 1 mixer is evacuated to -0.2Mpa.
3rd, graphite and sp powders are added to No. 2 mixers, it is dry-mixed.Stirred with the rotating speed 28rpm that revolves round the sun, rate of dispersion 1500rpm
30 minutes.
4th, the CMC glues for preparing No. 1 mixer add No. 2 mixers, with rotating speed 15rpm, the rate of dispersion of revolving round the sun
600rpm is stirred 5 minutes, and scrapes bucket once；Continue to stir, 40 points are stirred with the rotating speed 28rpm that revolves round the sun, rate of dispersion 2000rpm
Clock, scrapes bucket once in every 10 minutes.
5th, No. 2 mixers are added water to, is stirred 40 minutes, every 10 minutes with the rotating speed 28rpm that revolves round the sun, rate of dispersion 3200rpm
Bucket is scraped once, while adding a small amount of alcohol and starting to vacuumize.
6th, adding water to No. 2 mixers carries out viscosity adjustment, and 45 are stirred with the rotating speed 35rpm that revolves round the sun, rate of dispersion 4000rpm
Minute, scrape bucket once within every 10 minutes, while adding a small amount of alcohol and starting to vacuumize, control slurry viscosity is in 26 DEG C of test conditions
It is down 2200~2800mPas.
7th, add SBR and water to No. 2 mixers, stirred 30 minutes with revolution speed 23rpm, rate of dispersion 2200rpm.
8th, vacuum defoamation.No. 2 mixers are inverted with revolution speed 18rpm, are evacuated to -0.2Mpa, 40 minutes, control slurry
Material viscosity is 2200~2800mPas, discharging under 26 DEG C of test conditions.
Wherein, the material content in cathode size is as shown in the table.
| Name of material | Graphite | CMC | SP | SBR |
| Proportioning | 95.5% | 0.85% | 1.65% | 2% |
| Quality (g) | 4550 | 41 | 79 | 95 |
Comparative example one
1. graphite and sp powders to mixer, dry powder stirring are added.Stirred with the rotating speed 20rpm that revolves round the sun, rate of dispersion 1000rpm
20 minutes.
2. add water in mixer, infiltration is stirred.40min, 15 are stirred with the rotating speed 20rpm that revolves round the sun, rate of dispersion 2000rpm
Minute scrapes bucket once.
3. plus in CMC powders to mixer stir.10min is stirred with revolution speed 10rpm；Then with revolution speed
10rpm, rate of dispersion 2000rpm stir 5min.
4. mixer is added water to, pureed stirring is carried out.40min is stirred with the rotating speed 15rpm that revolves round the sun, rate of dispersion 2000rpm,
Bucket is scraped after 10min once.
5. add water to mixer, carry out high-viscosity stirring.Stirred with the rotating speed 15rpm that revolves round the sun, rate of dispersion 2000rpm
Bucket is scraped after 90min, 30min once.
6. adding water to mixer carries out viscosity adjustment.Stirred with the rotating speed 15rpm that revolves round the sun, rate of dispersion 2000rpm, control slurry
Material viscosity is in 2200-2800mPa.s.
7. SBR and suitable quantity of water to mixer are added.20min is stirred with revolution speed 10rpm, rate of dispersion 1000rpm.
8. vacuum defoamation.Mixer is inverted, revolution speed 15rpm, is evacuated to -0.1Mpa, 30 minutes, discharging.Survey viscous
Degree, tested viscosity control is in 2200-2800mpa.s at 26 DEG C.
Wherein, the material content in cathode size is as shown in the table.
| Name of material | Graphite | CMC | SP | SBR |
| Proportioning | 94.45% | 1.35% | 1.70% | 2.50% |
| Quality (g) | 4500 | 65.0 | 81 | 119 |
The cathode size that will be prepared is coated on Copper Foil, and effect is as shown in Figure 2.
Comparative example two
1. graphite and sp powders to mixer, dry powder stirring are added.Stirred with the rotating speed 25rpm that revolves round the sun, rate of dispersion 1200rpm
25 minutes.
2. add water in mixer, infiltration is stirred.50min, 15 are stirred with the rotating speed 25rpm that revolves round the sun, rate of dispersion 2600rpm
Minute scrapes bucket once.
3. plus in CMC powders to mixer stir.15min is stirred with revolution speed 12rpm；Then with revolution speed
15rpm, rate of dispersion 2500rpm stir 8min.
4. mixer is added water to, pureed stirring is carried out.50min is stirred with the rotating speed 18rpm that revolves round the sun, rate of dispersion 2500rpm,
Bucket is scraped after 10min once.
5. add water to mixer, carry out high-viscosity stirring.Stirred with the rotating speed 18rpm that revolves round the sun, rate of dispersion 2500rpm
Bucket is scraped after 95min, 30min once.
6. adding water to mixer carries out viscosity adjustment.Stirred with the rotating speed 18rpm that revolves round the sun, rate of dispersion 2200rpm, control slurry
Material viscosity is in 2200-2800mPa.s.
7. SBR and suitable quantity of water to mixer are added.25min is stirred with revolution speed 15rpm, rate of dispersion 1100rpm.
8. vacuum defoamation.Mixer is inverted, revolution speed 18rpm, is evacuated to -0.15Mpa, 35 minutes, discharging.Survey viscous
Degree, tested viscosity control is in 2200-2800mpa.s at 26 DEG C.
Wherein, the material content in cathode size is as shown in the table.
| Name of material | Graphite | CMC | SP | SBR |
| Proportioning | 93.5% | 1.85% | 2% | 2.65% |
| Quality (g) | 4455 | 88.2 | 95 | 126 |
Comparative example three
1. graphite and sp powders to mixer, dry powder stirring are added.Stirred with the rotating speed 30rpm that revolves round the sun, rate of dispersion 1500rpm
30 minutes.
2. add water in mixer, infiltration is stirred.60min, 15 are stirred with the rotating speed 30rpm that revolves round the sun, rate of dispersion 3200rpm
Minute scrapes bucket once.
3. plus in CMC powders to mixer stir.20min is stirred with revolution speed 15rpm；Then with revolution speed
20rpm, rate of dispersion 3000rpm stir 10min.
4. mixer is added water to, pureed stirring is carried out.60min is stirred with the rotating speed 20rpm that revolves round the sun, rate of dispersion 3000rpm,
Bucket is scraped after 10min once.
5. add water to mixer, carry out high-viscosity stirring.Stirred with the rotating speed 20rpm that revolves round the sun, rate of dispersion 3000rpm
Bucket is scraped after 100min, 30min once.
6. adding water to mixer carries out viscosity adjustment.Stirred with the rotating speed 20rpm that revolves round the sun, rate of dispersion 2500rpm, control slurry
Material viscosity is in 2200-2800mPa.s.
7. SBR and suitable quantity of water to mixer are added.30min is stirred with revolution speed 20rpm, rate of dispersion 1200rpm.
8. vacuum defoamation.Mixer is inverted, revolution speed 20rpm, is evacuated to -0.2Mpa, 40 minutes, discharging.Survey viscous
Degree, tested viscosity control is in 2200-2800mpa.s at 26 DEG C.
Wherein, the material content in cathode size is as shown in the table.
| Name of material | Graphite | CMC | SP | SBR |
| Proportioning | 95.5% | 0.85% | 1.65% | 2% |
| Quality (g) | 4550 | 41 | 79 | 95 |
As illustrated, the cathode size coating schematic diagram that Fig. 1 is embodiment to be prepared, the wellability and mobility of slurry compared with
It is good, copper foil surface can be uniformly coated on, there is no bubble, coating thickness can keep preferable uniformity；Fig. 2 is comparative example
The cathode size coating schematic diagram of preparation, because slurry wellability is poor, slurry fails to be uniformly coated in coating process
Copper foil surface, cathode size can form bubble with Copper Foil gap location.
As Fig. 3~6 are respectively the power battery cathode material prepared with former technique of the invention picture under the microscope.Slurry
The relatively low solvent (i.e. alcohol) of surface tension is added in material can effectively improve wetness degree of the water to graphite material；While CMC
It is the dispersant with surface-active, it is ensured that to the emulsion dispersion of the particle of low surface tension, improves dispersion of the graphite in water
Ability, that is, improve wetness degree of the water to graphite material.When the surface tension of liquid is less than the critical surface tension of solid, then
Liquid can arbitrarily be sprawled and soaked (such as Fig. 3 and 5) in the surface of solids；Conversely, liquid in the surface of solids due to that can not form
Continuous drop, and cannot sprawl and soak solid, shrinkage cavity may be caused (such as Fig. 4 and 6) occur during coating.
Selection is divided to two to three steps to add water respectively to be stirred, it is therefore an objective to improve wetting property of the water to graphite.Due to negative pole
About in 40%-45%, disposably add water slurry final molding solid content stirring, can cause that separation of solid and liquid situation is excessively obvious,
Part graphitic molecules are caused to fail to be infiltrated by hydrone.There are the bad phenomenons such as bubble shrinkage cavity during so as to being coated with.
The above implementation method is only that the preferred embodiment of the present invention is described, not to model of the invention
Enclose and be defined, on the premise of design spirit of the present invention is not departed from, those of ordinary skill in the art are to technical side of the invention
Various modifications and improvement that case is made, all should fall into the protection domain of claims of the present invention determination.
Claims (9)
1. a kind of lithium ion power cell cathode preparation method, it is characterised in that comprise the following steps：
（1）Sodium carboxymethylcellulose glue is prepared in No. 1 mixer；
（2）Conductive black and graphite dry powder are added in No. 2 mixers and is mixed；
（3）The sodium carboxymethylcellulose glue that will be prepared in No. 1 mixer adds No. 2 stirrings containing conductive black and graphite
In machine and mix；
（4）Adding water to solid content is reached 60 in containing sodium carboxymethylcellulose glue, conductive black and graphite No. 2 mixers
~ 65%, stirring, and carry out defoaming treatment；
（5）Add water to step（4）In No. 2 mixers after treatment, solid content is reduced to 42 ~ 45%, carry out viscosity adjustment, and
Defoaming treatment is carried out, control slurry viscosity is 2200 ~ 2800 mPas under 26 DEG C of test conditions；
（6）Styrene-butadiene latex and suitable quantity of water are added into step（5）It is stirred in No. 2 mixers after treatment；
（7）By step（6）Material vacuum deaeration in No. 2 mixers after treatment, control slurry viscosity is under 26 DEG C of test conditions
It is 2200 ~ 2800 mPas, cathode material of lithium-ion power battery needed for preparing.
2. a kind of lithium ion power cell cathode preparation method according to claim 1, it is characterised in that step（4）With
（5）The defoaming treatment is to add the alcohol of total stock quality fraction 0.2%-0.5% in No. 2 mixers and vacuumizing.
3. a kind of lithium ion power cell cathode preparation method according to claim 1, it is characterised in that step（1）Institute
The preparation method for stating sodium carboxymethylcellulose glue is comprised the following steps：
（11）A certain amount of deionized water is added in No. 1 mixer, then is uniformly added into a certain amount of sodium carboxymethylcellulose, made
The concentration of sodium carboxymethylcellulose is 2.3 ~ 2.9%；
（12）No. 1 mixer of sodium carboxymethylcellulose will be added and stirred 3 ~ 10 minutes with the rpm of rotating speed 38 ~ 45 that revolves round the sun, then with
Revolution rotating speed 18 ~ 25 rpm, the rpm of rate of dispersion 1500 ~ 2000 are stirred 5 ~ 10 minutes, start to vacuumize, while with the rotating speed that revolves round the sun
15 ~ 20 rpm, the rpm of rate of dispersion 2500 ~ 3500 are stirred 100 ~ 150 minutes；
（13）No. 1 mixer is shelved 100 ~ 120 minutes, vacuum is evacuated to for -0.09 ~ -0.1 Mpa.
4. a kind of lithium ion power cell cathode preparation method according to claim 1, it is characterised in that step（2）Institute
It is that conductive black and graphite dry powder are stirred with the rpm of rotating speed 20 ~ 28 that revolves round the sun, the rpm of rate of dispersion 1000 ~ 1500 to state blending manner
20 ~ 30 minutes.
5. a kind of lithium ion power cell cathode preparation method according to claim 1, it is characterised in that step（3）Institute
Blending manner is stated to comprise the following steps：
（31）No. 2 mixers of sodium carboxymethylcellulose glue, conductive black and graphite dry powder will be mixed with the rotating speed 10 ~ 15 that revolves round the sun
Rpm, the rpm of rate of dispersion 300 ~ 600 are stirred 3 ~ 5 minutes, and scrape bucket once；
（32）Continue to stir, stirred 30 ~ 40 minutes with the rpm of rotating speed 25 ~ 30 that revolves round the sun, rate of dispersion 1500-2000 rpm, and
Scrape bucket once within every 10 ~ 15 minutes.
6. a kind of lithium ion power cell cathode preparation method according to claim 1, it is characterised in that step（4）Institute
It is to be stirred 30 ~ 40 minutes, every 10 ~ 15 points with the rpm of rotating speed 25 ~ 30 that revolves round the sun, the rpm of rate of dispersion 2000 ~ 3200 to state agitating mode
Clock scrapes bucket once.
7. a kind of lithium ion power cell cathode preparation method according to claim 1, it is characterised in that step（5）Institute
It is to be stirred 30 ~ 45 minutes, every 10 ~ 15 points with the rpm of rotating speed 30 ~ 40 that revolves round the sun, the rpm of rate of dispersion 3500 ~ 4000 to state agitating mode
Clock scrapes bucket once.
8. a kind of lithium ion power cell cathode preparation method according to claim 1, it is characterised in that step（6）Institute
It is to be stirred 20 ~ 30 minutes with the rpm of revolution speed 20 ~ 25, the rpm of rate of dispersion 1600 ~ 2200 to state agitating mode.
9. a kind of lithium ion power cell cathode preparation method according to claim 1, it is characterised in that step（7）Institute
It is that No. 2 mixers are inverted with the rpm of revolution speed 15 ~ 20 to state material vacuum deaeration, while vacuumizing 30 minutes with up to vacuum
It is -0.09 ~ -0.1 Mpa to spend, discharging.
Priority Applications (1)
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107403914A (en) * | 2017-07-03 | 2017-11-28 | 江西安驰新能源科技有限公司 | A kind of dry mixing process of artificial plumbago negative pole 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 |
| CN108615889A (en) * | 2018-05-11 | 2018-10-02 | 合肥国轩高科动力能源有限公司 | A kind of single conjunction paste-making method of graphite particle again of lithium ion battery |
| CN109192923A (en) * | 2018-09-25 | 2019-01-11 | 清华大学 | A kind of preparation method of negative electrode of lithium ion battery electrocondution slurry |
| CN109524625A (en) * | 2018-10-25 | 2019-03-26 | 超威电源有限公司 | A kind of cathode mixing paste method |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393985A (en) * | 2007-09-21 | 2009-03-25 | 深圳市比克电池有限公司 | Negative pole material, preparation for battery and battery manufactured by the negative pole material |
| CN102891283A (en) * | 2011-07-22 | 2013-01-23 | 湖北骆驼特种电源有限公司 | Dry blending process for cathode of lithium-ion power battery |
| CN105047854A (en) * | 2015-06-30 | 2015-11-11 | 保定风帆新能源有限公司 | Preparation method for anode material of lithium ion battery |
-
2016
- 2016-12-25 CN CN201611212459.3A patent/CN106848205B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101393985A (en) * | 2007-09-21 | 2009-03-25 | 深圳市比克电池有限公司 | Negative pole material, preparation for battery and battery manufactured by the negative pole material |
| CN102891283A (en) * | 2011-07-22 | 2013-01-23 | 湖北骆驼特种电源有限公司 | Dry blending process for cathode of lithium-ion power battery |
| CN105047854A (en) * | 2015-06-30 | 2015-11-11 | 保定风帆新能源有限公司 | Preparation method for anode material of lithium ion battery |
Cited By (15)
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| CN107403914A (en) * | 2017-07-03 | 2017-11-28 | 江西安驰新能源科技有限公司 | A kind of dry mixing process of artificial plumbago negative pole 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 | A kind of single conjunction paste-making method of graphite particle again of lithium ion battery |
| CN109192923A (en) * | 2018-09-25 | 2019-01-11 | 清华大学 | A kind of preparation method of negative electrode of lithium ion battery electrocondution 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 |
| CN114300643A (en) * | 2022-01-17 | 2022-04-08 | 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 |
| 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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