CN106654211A - Slurry for lithium-ion battery and preparation method of slurry - Google Patents
Slurry for lithium-ion battery and preparation method of slurry Download PDFInfo
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- CN106654211A CN106654211A CN201611200897.8A CN201611200897A CN106654211A CN 106654211 A CN106654211 A CN 106654211A CN 201611200897 A CN201611200897 A CN 201611200897A CN 106654211 A CN106654211 A CN 106654211A
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
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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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Abstract
The invention relates to slurry for a lithium-ion battery and a preparation method of the slurry. The preparation method of the slurry for the lithium-ion battery comprises the following steps of (S10) removing ion from an active material, a binder and a conductive agent and then feeding the active material, the binder and the conductive agent to a twin-shaft paddle-type high-efficiency mixer, mixing evenly to obtain mixed powder, or removing ion from the active material, the binder and the conductive agent and then feeding the active material, the binder, the conductive agent and a solvent into the twin-shaft paddle-type high-efficiency mixer and mixing evenly to form premixed slurry; (S20) adding the solvent to the mixed powder, stirring for mixing evenly to form mixed slurry, or stirring the premixed slurry for mixing evenly to form the mixed slurry; (S30) feeding the mixed slurry to a high-speed disperser for high-speed dispersion and forming semi-finished product slurry of which the solid content is 70%-80%; and (S40) defoaming and sieving the semi-finished product slurry in vacuum to form the slurry for the lithium-ion battery. The technical process is simplified; the method is easy to operate and convenient to produce; the preparation time is shortened; and improvement of the production efficiency is facilitated.
Description
Technical field
The present invention relates to technical field of lithium ion, more particularly, it relates to a kind of pulp of lithium ion battery and its system
Preparation Method.
Background technology
In recent years new forms of energy are always the project that country payes attention to the most, and lithium ion battery is high because of output voltage, specific energy
High, life-span length, is quickly propelled in Battery Market, and existing battery producer starts constantly to expand the scale of production.At present compared with
For in ripe lithium battery, national governments, using all more paying attention to, constantly expand new forms of energy market to production, product, are to allow new
Energy sustainable development, the use to lithium ion battery has strict demand.
Slurrying provides electrode slurries, is the first auspicious link of Production Process of Lithium Battery, is also most important link.Existing lithium-ion electric
The shortcomings of there is complex process, fabrication cycle length, low production efficiency in the conventional preparation techniques method in pond.
The content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, there is provided a kind of process is simple, life
Produce the preparation method of the good pulp of lithium ion battery of cycle is short, stock quality and using lithium ion battery obtained in the preparation method
Slurry.
The technical solution adopted for the present invention to solve the technical problems is：Construct a kind of preparation side of pulp of lithium ion battery
Method, comprises the following steps：
S10, by active material, binding agent and conductive agent except putting into after iron in double-shaft paddle formula high efficient mixer, mixing is equal
It is even, form mixed powder；
S20, solvent is added in the mixed powder, stir to be well mixed, form mixed slurry；
S30, the mixed slurry is put into high speed dispersor and carry out high speed dispersion, it is 70-80% to form solid content
Semi-finished product slurry；
S40, by de-bubble under the semi-finished product slurry vacuum, sieve, formed pulp of lithium ion battery.
The present invention also provides a kind of preparation method of pulp of lithium ion battery, comprises the following steps：
S10, by active material, binding agent and conductive agent except double-shaft paddle formula high efficient mixer is put into together with solvent after iron
In, it is well mixed, form premix slurry；
S20, by the premix slurry agitation being well mixed, form mixed slurry；
S30, the mixed slurry is put into high speed dispersor and carry out high speed dispersion, it is 70-80% to form solid content
Semi-finished product slurry；
S40, by de-bubble under the semi-finished product slurry vacuum, sieve, formed pulp of lithium ion battery.
Preferably, in step S10, incorporation time is 3-5 minutes.
Preferably, in step S10, the active material, binding agent and conductive agent are carried out except iron, during except iron by tramp iron separator
Between≤30 minutes.
Preferably, the mixed slurry of step S20 is formed in stirrer for mixing, the mixer revolution speed≤15r/
Min, rotational velocity≤1000r/min stirs incorporation time≤60 minute.
Preferably, in step S30, the scattered linear velocity of high speed be 66m/s, control in dispersion process slurry temperature be 20～
45℃。
Preferably, in step S40, under vacuum the de-bubble time be 10-30 minutes, vacuum >=-0.08Mpa.
Preferably, the active material is positive electrode active materials or negative active core-shell material, and the solvent is N- methylpyrroles
Alkanone or deionized water.
Preferably, the positive electrode active materials are lithium and cobalt oxides (LiCoO2), lithium nickel oxide (LiNiO2), lithium manganese oxygen
Compound (LiMn2O4), manganese nickel cobalt composite oxides (LiMnxNiyCo1-x-yO2), lithium-barium oxide (LiV2O4) or oxide/lithium ferrite
(LiFePO2) in one or more；The negative active core-shell material is in Delanium, native graphite or carbonaceous mesophase spherules
One or more, wherein, x, y, x+y are all higher than 0 less than 1；
The binding agent is polyvinyl alcohol, Kynoar, vinylidene fluoride, polytetrafluoroethylene (PTFE), hexafluoropropene, acrylic acid
One or more in ester, polyurethane, sodium carboxymethylcellulose；The conductive agent be conductive black, electrically conductive graphite, carbon fiber,
One or more in CNT.
The present invention also provides a kind of pulp of lithium ion battery, is obtained using above-mentioned preparation method.
Beneficial effects of the present invention：The present invention is dry-mixed by the way that all raw materials are carried out using double-shaft paddle formula high efficient mixer
Close or wet mixing is closed, shorten the time of pulping process；Disperse wet mash using high speed dispersor, obtain the measured slurry of matter, simplify
Technological process, easily operated it is easy to production；Shorten preparation time, be favorably improved production efficiency.
Description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the flow chart of the preparation method of pulp of lithium ion battery in the embodiment of the present invention one；
Fig. 2 is the flow chart of the preparation method of pulp of lithium ion battery in the embodiment of the present invention two；
Fig. 3 is the schematic diagram of the preparation method device therefor of pulp of lithium ion battery of the present invention；
Fig. 4 is that the slurry viscosity of the pulp of lithium ion battery prepared using the inventive method and art methods is compared
Figure；
Fig. 5 is the solid content comparison diagram of the pulp of lithium ion battery prepared using the inventive method and art methods.
Specific embodiment
In order to be more clearly understood to the technical characteristic of the present invention, purpose and effect, now compare accompanying drawing and describe in detail
The specific embodiment of the present invention.
Embodiment one
Refering to Fig. 1, the preparation method of the pulp of lithium ion battery of the present invention, comprise the following steps：
S10, by active material, binding agent and conductive agent except putting into after iron in double-shaft paddle formula high efficient mixer, mixing is equal
It is even, form mixed powder.
Wherein, active material is positive electrode active materials or negative active core-shell material, solvent be 1-METHYLPYRROLIDONE or go from
Sub- water.Preferably, positive electrode active materials are lithium and cobalt oxides (LiCoO2), lithium nickel oxide (LiNiO2), lithium manganese oxide
(LiMn2O4), manganese nickel cobalt composite oxides (LiMnxNiyCo1-x-yO2), lithium-barium oxide (LiV2O4) or oxide/lithium ferrite
(LiFePO2) in one or more, wherein, x, y, x+y are all higher than 0 less than 1.
Negative active core-shell material is one or more in Delanium, native graphite or carbonaceous mesophase spherules.
Binding agent be polyvinyl alcohol, Kynoar, vinylidene fluoride, polytetrafluoroethylene (PTFE), hexafluoropropene, acrylate,
One or more in polyurethane, sodium carboxymethylcellulose.
Conductive agent is one or more in conductive black, electrically conductive graphite, carbon fiber, CNT.
Specifically, in step S10, by being removed by tramp iron separator, the active material after iron, binding agent and conductive agent are disposable
All in input double-shaft paddle formula high efficient mixer, all dry powder bodies are disposably done using double-shaft paddle formula high efficient mixer
Hybrid technique, forms mixed powder.Except iron time≤30 minute, incorporation time is 3-5 minutes.
Due to there is the contrary rotor in two direction of rotation on double-shaft paddle formula high efficient mixer, rotor by armature spindle, pole,
Blade is constituted, and pole is intersected with armature spindle " cross ", and blade is welded on pole into special angle.Paddle belt animal material on rotor
On the one hand along the rotation of trough inwall and to one end movement, material or so is on the other hand driven to stir；In the intersection weight of two rotors
Folded place, defines a weightless area, in this region, no matter the shape of material, size and density, can make on material
It is floating, in instantaneous weight loss state, make material that continuous circulation is formed in trough and stir, interlaced shearing is quick so as to reach
The effect being well mixed.
S20, solvent is added in mixed powder, stir to be well mixed, form mixed slurry.
In step S20, the materials of solvent require to be properly added according to solid content.Preferably, solvent is N- methylpyrroles
Alkanone or deionized water.When active material is positive electrode active materials, solvent is preferably 1-METHYLPYRROLIDONE；Active material is
During negative active core-shell material, solvent is preferably deionized water.Preferably, the mixed slurry of step S20 is formed in stirrer for mixing,
Mixer revolution speed≤the 15r/min, rotational velocity≤1000r/min stirs incorporation time≤60 minute.
S30, mixed slurry is put into high speed dispersor and carry out high speed dispersion, forms solid content for 70-80% partly into
Product slurry.
In step S30, the scattered linear velocity of high speed is 66m/s, and slurry temperature is controlled in dispersion process for 20～45 DEG C,
If necessary when higher (slurry heat up) is homogenized pot or adds cooling water or reduce rotating speed with alcohol wipe, and discharge viscosity 2900-
8000MPa·s.The mixed slurry that this step obtains step S20 carries out high-speed stirred dispersion, powder is broken up completely, system
Into finely dispersed slurry.
High speed dispersor adopts stepless speed regulation：There are the various ways such as electromagnetic speed-adjusting, frequency control and explosion-proof variable frequency variable speed.It is high
The dispersion impeller lower section of fast dispersion machine is laminar state, and pulp layer different in flow rate is diffused into one another, and plays peptizaiton.At a high speed
Dispersion machine has the several functions such as hydraulic lifting, 360 degree of revolution, stepless speed regulation, makes slurry in annular flow is rolled, and produces strong rotation
Whirlpool, pulp surface particle drops in the shape of a spiral vortex bottom；High speed dispersor forms turbulent area, slurry in dispersion impeller edge
And particle is subject to intensive shear and impact.Upper and lower two lines are formed outside region, slurry is fully circulated and stirred, Neng Gou
Transforming to another cylinder from a cylinder in the very short time carries out operation, operating efficiency is drastically increased, while also reducing
Hand labor intensity, can obtain disperseing splendid slurry.
S40, by de-bubble under semi-finished product slurry vacuum, sieve, formed pulp of lithium ion battery.
In the step, under vacuum the de-bubble time be 10-30 minutes, vacuum >=-0.08Mpa.Preferably make in this step
With mixer the step S4 mixed slurry that at a high speed dispersion is formed is carried out vacuumizing de-bubble.
In above-mentioned preparation method, the raw material dosage such as active material, conductive agent and binding agent is starched according to lithium ion cell positive
Material or each raw material proportioning of cathode size are weighed, and can be realized using set proportioning in prior art.
Embodiment two
Refering to Fig. 2, the preparation method of the pulp of lithium ion battery of the present invention, comprise the following steps：
S10, by active material, binding agent and conductive agent except double-shaft paddle formula high efficient mixer is put into together with solvent after iron
In, it is well mixed, form premix slurry.Preferably, except iron time≤30 minute, incorporation time is 3-5 minutes.Specifically, should
In step S10, active material, binding agent and conductive agent are removed after iron by tramp iron separator, disposable all inputs together with solvent
In double-shaft paddle formula high efficient mixer, all dry powder bodies and solvent carry out disposable wet mixing using double-shaft paddle formula high efficient mixer
Technique is closed, premix slurry is formed.
The materials of solvent require to be properly added according to solid content.Preferably, solvent is 1-METHYLPYRROLIDONE or deionization
Water.When active material is positive electrode active materials, solvent is preferably 1-METHYLPYRROLIDONE；Active material is negative active core-shell material
When, solvent is preferably deionized water.
S20, will premix slurry agitation being well mixed, form mixed slurry.Preferably, the mixed slurry of step S20 exists
Stirrer for mixing is formed, mixer revolution speed≤15r/min, rotational velocity≤1000r/min, stirs incorporation time≤60
Minute.
S30, mixed slurry is put into high speed dispersor and carry out high speed dispersion, forms solid content for 70-80% partly into
Product slurry.
In step S30, the scattered linear velocity of high speed is 66m/s, and slurry temperature is controlled in dispersion process for 20～45 DEG C,
If necessary when higher (slurry heat up) is homogenized pot or adds cooling water or reduce rotating speed with alcohol wipe, and discharge viscosity 2900-
8000MPa·s.The mixed slurry that this step obtains step S20 carries out high-speed stirred dispersion, powder is broken up completely, system
Into finely dispersed slurry.
S40, by de-bubble under semi-finished product slurry vacuum, sieve, formed pulp of lithium ion battery.In the step, remove under vacuum
The bubble time be 10-30 minutes, vacuum >=-0.08Mpa.Mixer is preferably used in this step shape is disperseed at a high speed to step S4
Into mixed slurry carry out vacuumizing de-bubble.
In above-mentioned preparation method, the raw material dosage such as active material, conductive agent and binding agent is starched according to lithium ion cell positive
Material or each raw material proportioning of cathode size are weighed, and can be realized using set proportioning in prior art.
The pulp of lithium ion battery of the present invention, is obtained using above-mentioned preparation method.When the active material for using is positive pole
Lithium ion battery anode glue size can be prepared during active material, pole piece is can be made into using the lithium ion battery anode glue size, as lithium
The positive plate of ion battery；Lithium ion battery cathode slurry can be prepared when the active material for using is negative active core-shell material, is made
Pole piece is can be made into the lithium ion battery cathode slurry, as the negative plate of lithium ion battery.
When pole piece makes, pulp of lithium ion battery obtained above is coated on aluminium foil, is obtained final product after drying.
Core is wound into after positive plate and negative plate, barrier film are stacked, core is put into aluminum hull, inject electrolyte, envelope
Mouthful, lithium ion battery is obtained.
The present invention and prior art will be compared with specific embodiment and comparative example below.
Embodiment 1
With reference to Fig. 3, the preparation process of embodiment 1 is as follows：
A () presses formula rate (positive electrode active materials 94%-98%, conductive agent 1.0%-4.0%, bonding agent 0.8%-
2.0%) powder is weighed, in being separately added into correspondence tank, through tramp iron separator, conductive agent 2 glues positive electrode active materials 1 through tramp iron separator
Agent 3 is connect through tramp iron separator, except iron time≤30min；
B () is placed on three kinds of powder materials in double-shaft paddle formula high efficient mixer 4 under simultaneously, be well mixed, incorporation time
3-5min, obtains positive pole mixed powder；
C () adds all positive pole mixed powders in mixer 6, by formula solvent 5 (1-METHYLPYRROLIDONE) is weighed up, will
Solvent 5 adds wet mixing in mixer 6 to close by double-shaft paddle formula high efficient mixer 4, equipment revolution speed≤15rpm, from rotating speed
Degree≤1000rpm, incorporation time≤60min；
D () is completed the wet mash after step c and is disperseed by high speed dispersor 7, rotating speed is 14000rpm, linear velocity 66m/s；
Slurry temperature is controlled for 20～45 DEG C, pot or plus cooling water or reduction is homogenized with alcohol wipe (when slurry heats up higher) if necessary
Rotating speed, discharge viscosity 2900-8000MPas, and solid content is 70～80%；
E () completes the scattered slurry of Step d high speed and vacuumizes de-bubble using mixer 6, vacuum >=-0.08Mpa takes out true
10-30min between space-time；
F () completes 8 dischargings of sieving after step e, complete slurry and go out in slurry tank 9, obtains lithium ion battery anode glue size.
Embodiment 2
With reference to Fig. 3, the preparation process of embodiment 2 is as follows：
A () presses formula rate (positive electrode active materials 94%-98%, conductive agent 1.0%-4.0%, bonding agent 0.8%-
2.0%) powder is weighed, in being separately added into correspondence tank, through tramp iron separator, conductive agent 2 glues positive electrode active materials 1 through tramp iron separator
Agent 3 is connect through tramp iron separator, by three kinds of powder materials and solvent 5 (1-METHYLPYRROLIDONE) and meanwhile under to be placed on double-shaft paddle formula efficient
In mixer 4, it is well mixed, incorporation time 3-5min, obtains positive pole premix slurry；
B () adds all positive poles premix slurry in mixer 6, stirring machine equipment revolution speed is≤15rpm, from rotating speed
Degree≤1000rpm, incorporation time≤60min；
C () is completed the slurry after b step and is disperseed by high speed dispersor 7, rotating speed 14000rpm, linear velocity 66m/s；Control
Slurry temperature is 20～45 DEG C, is homogenized pot or plus cooling water or reduction turn with alcohol wipe (when slurry heats up higher) if necessary
Speed, discharge viscosity 2900-8000MPas, solid content 70～80%；
D () will complete the scattered slurry of step c high speed and vacuumize de-bubble using mixer 6, vacuum >=-0.08Mpa is taken out
Vacuum time 10-30min；
E () completes 8 dischargings of sieving after f steps, complete slurry and go out in slurry tank 9, obtains lithium ion battery anode glue size.
Comparative example 1
A () in mass ratio, 100% solvent is added in size making pot, vacuumize benefit nitrogen, and vacuum -0.08～-
0.1mpa, nitrogen pressure is more than or equal to 0.1mpa, adds 0.9-1.5% bonding agents, and after stirring 60min is uniform, the stirring turns
1500～2000rpm of the fast high speeds of 30～40rpm+ at a slow speed；Obtain glue；
B () adds 0.6-1.0% conductive agents stirring 60min in glue, at a slow speed 30～40rpm+ is high for the speed of agitator
1500～2000rpm of speed, then 30min is vacuumized, vacuum is higher than -0.09Mpa, viscosity 400-1000MPas, solid content 4.0
～5.0%；
C () adds positive electrode (97.37%-98.07%), stirring, and rotating speed is 1500-2200r/min, mixing time
120～150min, then 30min is vacuumized, vacuum is not higher than -0.09MPa；Slurry controls temperature for 20～45 DEG C, if necessary
(when slurry heats up higher) is homogenized pot or adds cooling water or reduce rotating speed with alcohol wipe, and discharge viscosity 2900-8000MPas,
Solid content 70～80%；
D the slurry after the completion of () stirring crosses the filtration of 150 mesh filter screens, obtain lithium ion battery anode glue size.
The comparing result of embodiment 1,2 and comparative example 1 is as follows：
1st, using comparative example technique used time 5.5h-6.0 hours, and embodiment used time 2.5h-3.0h, embodiment compares contrast
Example mixing time can shorten half, therefore the present invention total time better than the preparation method of traditional (comparative example 1)；
2nd, need to beat conductive gelatin in the preparation process of comparative example 1, and embodiment 1 and 2 is without the need for glue；Comparative example 1 needs feeding two
Secondary, twice, and embodiment 1 and 2 need feeding once for blanking, and once, other are carried out automatically by device systems for blanking, therefore this
Invented technology is simpler；
3rd, need to repeatedly be checked using comparative example 1, and embodiment only does a final inspection, can improve operating efficiency, reduces
Hand labor intensity.
It is the slurry viscosity comparison diagram of the embodiment of the present invention 1,2 and comparative example 1 refering to Fig. 4 and Fig. 5, Fig. 4, Fig. 5 is this
The slurry solid content comparison diagram of bright embodiment 1,2 and comparative example 1, as can be seen from Figure 4 and Figure 5, slurry prepared by the present invention glues
Degree, solid content are more stable, and quality is more excellent, improves pulp of lithium ion battery product quality.
It should be understood that above example only expresses the preferred embodiment of the present invention, its description is more concrete and detailed
Therefore carefully, but the restriction to the scope of the claims of the present invention can not be interpreted as；It should be pointed out that for the common skill of this area
For art personnel, without departing from the inventive concept of the premise, independent assortment can be carried out to above-mentioned technical characterstic, can also be done
Go out some deformations and improvement, these belong to protection scope of the present invention；Therefore, it is all to be done with scope of the invention as claimed
Equivalents and modification, all should belong to the covering scope of the claims in the present invention.
Claims (10)
1. a kind of preparation method of pulp of lithium ion battery, it is characterised in that comprise the following steps：
S10, by active material, binding agent and conductive agent except putting into double-shaft paddle formula high efficient mixer after iron, be well mixed, shape
Into mixed powder；
S20, solvent is added in the mixed powder, stir to be well mixed, form mixed slurry；
S30, the mixed slurry is put into high speed dispersor and carry out high speed dispersion, forms solid content for 70-80% partly into
Product slurry；
S40, by de-bubble under the semi-finished product slurry vacuum, sieve, formed pulp of lithium ion battery.
2. a kind of preparation method of pulp of lithium ion battery, it is characterised in that comprise the following steps：
S10, by active material, binding agent and conductive agent except putting into together with solvent in double-shaft paddle formula high efficient mixer after iron,
It is well mixed, forms premix slurry；
S20, by the premix slurry agitation being well mixed, form mixed slurry；
S30, the mixed slurry is put into high speed dispersor and carry out high speed dispersion, forms solid content for 70-80% partly into
Product slurry；
S40, by de-bubble under the semi-finished product slurry vacuum, sieve, formed pulp of lithium ion battery.
3. preparation method according to claim 1 and 2, it is characterised in that in step S10, incorporation time is 3-5 minutes.
4. preparation method according to claim 1 and 2, it is characterised in that in step S10, the active material, binding agent
And conductive agent is carried out except iron, except iron time≤30 minute by tramp iron separator.
5. preparation method according to claim 1 and 2, it is characterised in that the mixed slurry of step S20 is mixed in mixer
Close and formed, the mixer revolution speed≤15r/min, rotational velocity≤1000r/min stirs incorporation time≤60 minute.
6. preparation method according to claim 1 and 2, it is characterised in that in step S30, the scattered linear velocity of high speed is
66m/s, controls slurry temperature for 20～45 DEG C in dispersion process.
7. preparation method according to claim 1 and 2, it is characterised in that in step S40, the de-bubble time is 10- under vacuum
30 minutes, vacuum >=-0.08Mpa.
8. preparation method according to claim 1 and 2, it is characterised in that the active material be positive electrode active materials or
Negative active core-shell material, the solvent is 1-METHYLPYRROLIDONE or deionized water.
9. preparation method according to claim 8, it is characterised in that the positive electrode active materials are lithium and cobalt oxides
(LiCoO2), lithium nickel oxide (LiNiO2), lithium manganese oxide (LiMn2O4), manganese nickel cobalt composite oxides (LiMnxNiyCo1-x- yO2), lithium-barium oxide (LiV2O4) or oxide/lithium ferrite (LiFePO2) in one or more；The negative active core-shell material is behaved
One or more in graphite, native graphite or carbonaceous mesophase spherules is made, wherein, x, y, x+y are all higher than 0 less than 1；
The binding agent be polyvinyl alcohol, Kynoar, vinylidene fluoride, polytetrafluoroethylene (PTFE), hexafluoropropene, acrylate,
One or more in polyurethane, sodium carboxymethylcellulose；The conductive agent is conductive black, electrically conductive graphite, carbon fiber, carbon are received
One or more in mitron.
10. a kind of pulp of lithium ion battery, it is characterised in that be obtained using the preparation method described in any one of claim 1-9.
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| PCT/CN2017/113399 WO2018113486A1 (en) | 2016-12-22 | 2017-11-28 | Slurry for lithium-ion battery and preparation method therefor |
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| CN107623125A (en) * | 2017-09-30 | 2018-01-23 | 中航锂电（江苏）有限公司 | A kind of lithium ion battery cathode slurry preparation method |
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