CN110034276A - A kind of mixing pulping process of positive electrode - Google Patents
A kind of mixing pulping process of positive electrode Download PDFInfo
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- CN110034276A CN110034276A CN201910358463.8A CN201910358463A CN110034276A CN 110034276 A CN110034276 A CN 110034276A CN 201910358463 A CN201910358463 A CN 201910358463A CN 110034276 A CN110034276 A CN 110034276A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000002156 mixing Methods 0.000 title claims abstract description 13
- 238000004537 pulping Methods 0.000 title claims abstract description 8
- 239000002002 slurry Substances 0.000 claims abstract description 83
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 67
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 67
- 239000002253 acid Substances 0.000 claims abstract description 66
- 239000002245 particle Substances 0.000 claims abstract description 54
- 239000011149 active material Substances 0.000 claims abstract description 43
- 239000010941 cobalt Substances 0.000 claims abstract description 40
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 40
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 40
- KFDQGLPGKXUTMZ-UHFFFAOYSA-N [Mn].[Co].[Ni] Chemical compound [Mn].[Co].[Ni] KFDQGLPGKXUTMZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 150000001868 cobalt Chemical class 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 88
- 239000002033 PVDF binder Substances 0.000 claims description 36
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 36
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 36
- 239000007787 solid Substances 0.000 claims description 27
- 239000003795 chemical substances by application Substances 0.000 claims description 24
- 238000004513 sizing Methods 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 13
- 239000011230 binding agent Substances 0.000 claims description 8
- 239000006258 conductive agent Substances 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 2
- 239000007774 positive electrode material Substances 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 5
- 239000011268 mixed slurry Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 238000004587 chromatography analysis Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000000518 rheometry Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- MZZUATUOLXMCEY-UHFFFAOYSA-N cobalt manganese Chemical compound [Mn].[Co] MZZUATUOLXMCEY-UHFFFAOYSA-N 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/50—Mixing liquids with solids
- B01F23/51—Methods thereof
- B01F23/511—Methods thereof characterised by the composition of the liquids or solids
-
- 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
-
- 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
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- 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
-
- 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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- 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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Dispersion Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention provides a kind of mixing pulping process of positive electrode, positive electrode includes the first active material and the second active material, and first active material is selected from cobalt acid lithium or modified cobalt acid lithium；Second active material is selected from nickel manganese cobalt acid lithium or Modified Nickel manganese cobalt acid lithium.The second particle that first active material includes the first particle that average grain diameter is 80-200nm and average grain diameter is 1.2-1.5 μm；The average grain diameter of second active material is 2-2.5 μm；Wherein according to first particle, value 100% on the basis of the gross mass of the second particle and the second active material, the first particle accounts for 8-12%, and the second particle accounts for 20-25%, and the second active material accounts for 65-70%；First particle, the second particle and the second active material are distinguished slurrying respectively by the present invention, then batch mixed, and obtained Stability of Slurry is high, and paintability is good.
Description
Technical field
The present invention relates to lithium ion battery production technical fields, more particularly to a kind of mixing slurrying side of positive electrode
Method.
Background technique
The advantages that power battery has energy density high, and power is big, environmentally friendly, is usually used in electric automobiles.It is existing electronic
The anode that vehicle battery generally uses cobalt acid lithium and ternary material to be blended, and since cobalt acid lithium is different with the partial size of ternary material, slurry
The coating performance of material is poor, and cracking is easy to happen during drying, through inventor the study found that leading to the original of drawbacks described above
Because mainly since the Stability of Slurry of blended anode is poor, causing chromatography phenomenon more serious, to influence to be coated with, Yi Jigan
Dry effect, and then influence the chemical property of battery.
Summary of the invention
Inventors discovered through research that when the partial size of the particle of the certain content in cobalt acid lithium is in particular range, energy
Enough to form relatively stable rheology phase with slurry is made, the stability of slurry is greatly improved.
On this basis, the present invention provides a kind of mixing pulping process of positive electrode, positive electrode includes first living
Property material and the second active material, first active material includes the first particle and average grain that average grain diameter is 80-200nm
The second particle that diameter is 1.2-1.5 μm；The average grain diameter of second active material is 2-2.5 μm；Wherein according to described first
Value 100% on the basis of the gross mass of particle, the second particle and the second active material, the first particle account for 8-12%, and the second particle accounts for
20-25%, the second active material account for 65-70%；The present invention is respectively by the first particle, the second particle and the second active material difference
Slurrying, then batch mixed, obtained Stability of Slurry height, paintability are good.First active material be selected from cobalt acid lithium or
Modified cobalt acid lithium；Second active material is selected from nickel manganese cobalt acid lithium or Modified Nickel manganese cobalt acid lithium.
Specific scheme is as follows:
A kind of mixing pulping process of positive electrode, the mixing pulping process of positive electrode, positive electrode include first living
Property material and the second active material, first active material includes the first particle and average grain that average grain diameter is 80-200nm
The second particle that diameter is 1.2-1.5 μm；The average grain diameter of second active material is 2-2.5 μm；Wherein according to anode sizing agent
In first particle, value 100% on the basis of the gross mass of the second particle and the second active material, the first particle accounts for 8-
12%, the second particle accounts for 20-25%, and the second active material accounts for 65-70%, wherein specifically includes the following steps:
1), by binder, conductive agent sequentially adds solvent, stirring, and the first particle is added, and stirring obtains the first slurry；
2), by binder, conductive agent sequentially adds solvent, stirring, and the second particle is added, and stirring obtains the second slurry；
3), by binder, conductive agent sequentially adds solvent, stirring, and the second active material is added, and stirring obtains third slurry
Material；
4), according to the first particle in anode sizing agent, the ratio of the second particle and the second active material, third slurry is stirred on side
Material, the first slurry of Bian Jiang are added slowly in third slurry, continue to stir, be then while stirring added to the second slurry mixed
It closes in slurry, solvent adjustment solid content is added, stirring obtains anode sizing agent.
Further, first active material is selected from cobalt acid lithium or modified cobalt acid lithium；Second active material is selected from nickel manganese
Cobalt acid lithium or Modified Nickel manganese cobalt acid lithium.
Further, the solid content of the anode sizing agent is 56-58%.
Further, the solid content of first slurry is 62-65%, and the solid content of second slurry is 60-62%,
The solid content of the third slurry is 58-60%.
Further, the first average particle size is 80-120nm.
Further, wherein in anode sizing agent, positive active material, binder, the ratio of conductive agent are 100:6-7:4-
5。
Further, specifically includes the following steps:
1), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, the first particle is added, stirs 8h,
The first slurry is obtained, wherein the ratio of the first particle, PVDF and conductive carbon black is 100:6-7:4-5；
2), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, the second particle is added, stirs 6h,
The second slurry is obtained, wherein the ratio of the second particle, PVDF and conductive carbon black is 100:6-7:4-5；
3), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, the second active material, stirring is added
4h obtains third slurry, wherein the ratio of the second active material, PVDF and conductive carbon black is 100:6-7:4-5；
4), according to the first particle in anode sizing agent, the ratio of the second particle and the second active material, third slurry is stirred on side
Material, the first slurry of Bian Jiang are added slowly in third slurry, are continued to stir 4h, are then while stirring added to the second slurry
In mixed slurry, NMP is added and adjusts solid content, stirs 4h, obtains anode sizing agent.
The invention has the following beneficial effects:
1), when the partial size of the particle of the certain content in cobalt acid lithium is in particular range, can with make slurry formed compared with
For stable rheology phase, the stability of slurry is greatly improved；
2) active material of three kinds of different-grain diameters, is distinguished into mixing, is conducive to the dispersion of a variety of materials, and for difference
Material particle size adjustment slurry solid solution capacity, be conducive to increase slurry stability；
3), inventors have found that three kinds of slurries use the addition sequence invented, be conducive to the mutual dispersion of three kinds of slurries,
It avoids settling, is conducive to quickly form stable slurry；
4), mixing process of the invention is simple, and the Stability of Slurry of preparation can be good.
Specific embodiment
The present invention will be described in more detail below by specific embodiment, but protection scope of the present invention not by
It is limited to these embodiments.In following embodiment, the first active material is cobalt acid lithium；Second active material be nickel manganese cobalt acid lithium (Ni:
Mn:Co is 8:1:1)
Embodiment 1
1), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, it is 80nm's that average grain diameter, which is added,
Cobalt acid lithium A stirs 8h, obtains the first slurry, wherein cobalt acid lithium, and the ratio of PVDF and conductive carbon black is 100:6:4, and solid content is
62%；
2), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, it is 1.2 μm that average grain diameter, which is added,
Cobalt acid lithium B stirs 6h, obtains the second slurry, wherein cobalt acid lithium, and the ratio of PVDF and conductive carbon black is 100:6:4, and solid content is
60%；
3), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, the nickel that average grain diameter is 2 μm is added
Manganese cobalt acid lithium stirs 4h, obtains third slurry, wherein nickel manganese cobalt acid lithium, and the ratio of PVDF and conductive carbon black is 100:6:4, Gu
Content is 58%；
4) 8%, is accounted for according to cobalt acid lithium A in anode sizing agent, cobalt acid lithium B accounts for 25%, and nickel manganese cobalt acid lithium accounts for 67% ratio, side
Third slurry is stirred, the first slurry of Bian Jiang is added slowly in third slurry, continues to stir 4h, then while stirring by second
Slurry is added in mixed slurry, and NMP is added and adjusts solid content to 58%, stirs 4h, obtains anode sizing agent.
Embodiment 2
1), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, it is 200nm's that average grain diameter, which is added,
Cobalt acid lithium A stirs 8h, obtains the first slurry, wherein cobalt acid lithium, and the ratio of PVDF and conductive carbon black is 100:7:5, and solid content is
65%；
2), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, it is 1.5 μm that average grain diameter, which is added,
Cobalt acid lithium B stirs 6h, obtains the second slurry, wherein cobalt acid lithium, and the ratio of PVDF and conductive carbon black is 100:7:5, and solid content is
62%；
3), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, it is 2.5 μm that average grain diameter, which is added,
Nickel manganese cobalt acid lithium stirs 4h, obtains third slurry, wherein nickel manganese cobalt acid lithium, and the ratio of PVDF and conductive carbon black is 100:7:5,
Solid content is 60%；
4) 12%, is accounted for according to cobalt acid lithium A in anode sizing agent, cobalt acid lithium B accounts for 20%, and nickel manganese cobalt acid lithium accounts for 68% ratio,
Third slurry is stirred on side, and the first slurry of Bian Jiang is added slowly in third slurry, continues to stir 4h, then while stirring by the
Two slurries are added in mixed slurry, and NMP is added and adjusts solid content to 58%, stirs 4h, obtains anode sizing agent.
Embodiment 3
1), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, it is 80nm's that average grain diameter, which is added,
Cobalt acid lithium A stirs 8h, obtains the first slurry, wherein cobalt acid lithium, and the ratio of PVDF and conductive carbon black is 100:6:5, and solid content is
63%；
2), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, it is 1.4 μm that average grain diameter, which is added,
Cobalt acid lithium B stirs 6h, obtains the second slurry, wherein cobalt acid lithium, and the ratio of PVDF and conductive carbon black is 100:6:5, and solid content is
61%；
3), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, it is 2.2 μm that average grain diameter, which is added,
Nickel manganese cobalt acid lithium stirs 4h, obtains third slurry, wherein nickel manganese cobalt acid lithium, and the ratio of PVDF and conductive carbon black is 100:6:5,
Solid content is 60%；
4) 10%, is accounted for according to cobalt acid lithium A in anode sizing agent, cobalt acid lithium B accounts for 25%, and nickel manganese cobalt acid lithium accounts for 65% ratio,
Third slurry is stirred on side, and the first slurry of Bian Jiang is added slowly in third slurry, continues to stir 4h, then while stirring by the
Two slurries are added in mixed slurry, and NMP is added and adjusts solid content to 58%, stirs 4h, obtains anode sizing agent.
Embodiment 4
1), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, it is 120nm's that average grain diameter, which is added,
Cobalt acid lithium A stirs 8h, obtains the first slurry, wherein cobalt acid lithium, and the ratio of PVDF and conductive carbon black is 100:6:5, and solid content is
64%；
2), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, it is 1.4 μm that average grain diameter, which is added,
Cobalt acid lithium B stirs 6h, obtains the second slurry, wherein cobalt acid lithium, and the ratio of PVDF and conductive carbon black is 100:6:5, and solid content is
62%；
3), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, it is 2.5 μm that average grain diameter, which is added,
Nickel manganese cobalt acid lithium stirs 4h, obtains third slurry, wherein nickel manganese cobalt acid lithium, and the ratio of PVDF and conductive carbon black is 100:6:5,
Solid content is 60%；
4) 10%, is accounted for according to cobalt acid lithium A in anode sizing agent, cobalt acid lithium B accounts for 20%, and nickel manganese cobalt acid lithium accounts for 70% ratio,
Third slurry is stirred on side, and the first slurry of Bian Jiang is added slowly in third slurry, continues to stir 4h, then while stirring by the
Two slurries are added in mixed slurry, and NMP is added and adjusts solid content to 58%, stirs 4h, obtains anode sizing agent.
Comparative example 1
The cobalt acid lithium A that average grain diameter is 500nm is provided, other parameters are same as Example 4.
Comparative example 2
The cobalt acid lithium A that average grain diameter is 30nm is provided, other parameters are same as Example 4.
Comparative example 3
Cobalt acid lithium A accounts for 20% in anode sizing agent, and cobalt acid lithium B accounts for 10%, and nickel manganese cobalt acid lithium accounts for 70%, other parameters and implements
Example 4 is identical.
Comparative example 4
Cobalt acid lithium A accounts for 5% in anode sizing agent, and cobalt acid lithium B accounts for 25%, and nickel manganese cobalt acid lithium accounts for 70%, other parameters and implements
Example 4 is identical.
Test and result
Then the viscosity for measuring slurry places 6h at room temperature, the slurry at top layer or less 5cm is measured after 12h, 18h
Solid content, data are shown in Table 1, from the comparison of embodiment 1-4 and comparative example 1-4 as it can be seen that mixed viscosity is substantially close to but cobalt
The particle size range and content range of sour lithium A can all influence the stability of slurry, and standing time is more long, and chromatography phenomenon is brighter
Aobvious, the stability of slurry is poorer.
Table 1
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it would be recognized that above-mentioned
Description be not considered as limitation of the present invention.
Claims (7)
1. a kind of mixing pulping process of positive electrode, the mixing pulping process of positive electrode, positive electrode include the first activity
Material and the second active material, first active material include the first particle and average grain diameter that average grain diameter is 80-200nm
For 1.2-1.5 μm of the second particle；The average grain diameter of second active material is 2-2.5 μm；Wherein according in anode sizing agent
First particle, value 100% on the basis of the gross mass of the second particle and the second active material, the first particle accounts for 8-12%,
Second particle accounts for 20-25%, and the second active material accounts for 65-70%, wherein specifically includes the following steps:
1), by binder, conductive agent sequentially adds solvent, stirring, and the first particle is added, and stirring obtains the first slurry；
2), by binder, conductive agent sequentially adds solvent, stirring, and the second particle is added, and stirring obtains the second slurry；
3), by binder, conductive agent sequentially adds solvent, stirring, and the second active material is added, and stirring obtains third slurry；
4), according to the first particle in anode sizing agent, the ratio of the second particle and the second active material, third slurry, side are stirred in side
First slurry is added slowly in third slurry, continues to stir, the second slurry is then added to mixing slurry while stirring
In material, solvent adjustment solid content is added, stirring obtains anode sizing agent.
2. first active material is selected from cobalt acid lithium or modified cobalt acid lithium such as above-mentioned method described in claim 1；Second is living
Property material be selected from nickel manganese cobalt acid lithium or Modified Nickel manganese cobalt acid lithium.
3. the method as described in the claims, the solid content of the anode sizing agent is 56-58%.
4. the solid content of the method as described in the claims, first slurry is 62-65%, second slurry is consolidated
Content is 60-62%, and the solid content of the third slurry is 58-60%.
5. the method as described in the claims, the first average particle size is 80-120nm.
6. the method as described in the claims, wherein in anode sizing agent, positive active material, binder, the ratio of conductive agent
Example is 100:6-7:4-5.
7. the method as described in the claims, specifically includes the following steps:
1), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, the first particle is added, 8h is stirred, obtains
First slurry, wherein the ratio of the first particle, PVDF and conductive carbon black is 100:6-7:4-5；
2), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, the second particle is added, 6h is stirred, obtains
Second slurry, wherein the ratio of the second particle, PVDF and conductive carbon black is 100:6-7:4-5；
3), PVDF is added in NMP, stirs 2h, adds conductive carbon black, stirs 4h, the second active material is added, stirs 4h,
Third slurry is obtained, wherein the ratio of the second active material, PVDF and conductive carbon black is 100:6-7:4-5；
4), according to the first particle in anode sizing agent, the ratio of the second particle and the second active material, third slurry, side are stirred in side
First slurry is added slowly in third slurry, continues to stir 4h, the second slurry is then added to mixing while stirring
In slurry, NMP is added and adjusts solid content, stirs 4h, obtains anode sizing agent.
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| CN201910358463.8A CN110034276B (en) | 2019-04-30 | 2019-04-30 | Mixing and pulping method of anode material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN111276757A (en) * | 2020-02-19 | 2020-06-12 | 金妍 | Preparation method of power type lithium ion battery |
| CN111313085A (en) * | 2020-04-13 | 2020-06-19 | 陆信甫 | Preparation method of lithium ion battery anode |
| CN111864179A (en) * | 2020-09-03 | 2020-10-30 | 东莞维科电池有限公司 | Positive pole piece and preparation method thereof, lithium ion battery containing positive pole piece and application of lithium ion battery |
| CN111933913A (en) * | 2020-08-18 | 2020-11-13 | 苏州精诚智造智能科技有限公司 | Preparation method for anode |
| WO2022051991A1 (en) * | 2020-09-10 | 2022-03-17 | 宁德时代新能源科技股份有限公司 | Electrode active composition and preparation method thereof, electrode, battery and apparatus |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110581256A (en) * | 2019-10-17 | 2019-12-17 | 朱虎 | Preparation method of lithium iron phosphate anode |
| CN111276757A (en) * | 2020-02-19 | 2020-06-12 | 金妍 | Preparation method of power type lithium ion battery |
| CN111313085A (en) * | 2020-04-13 | 2020-06-19 | 陆信甫 | Preparation method of lithium ion battery anode |
| CN111313085B (en) * | 2020-04-13 | 2021-07-06 | 东方醒狮储能电池有限公司 | Preparation method of lithium ion battery anode |
| CN111933913A (en) * | 2020-08-18 | 2020-11-13 | 苏州精诚智造智能科技有限公司 | Preparation method for anode |
| CN111864179A (en) * | 2020-09-03 | 2020-10-30 | 东莞维科电池有限公司 | Positive pole piece and preparation method thereof, lithium ion battery containing positive pole piece and application of lithium ion battery |
| CN111864179B (en) * | 2020-09-03 | 2021-10-22 | 东莞维科电池有限公司 | Positive pole piece and preparation method thereof, lithium ion battery containing positive pole piece and application of lithium ion battery |
| WO2022051991A1 (en) * | 2020-09-10 | 2022-03-17 | 宁德时代新能源科技股份有限公司 | Electrode active composition and preparation method thereof, electrode, battery and apparatus |
| US12002947B2 (en) | 2020-09-10 | 2024-06-04 | Contemporary Amperex Technology Co., Limited | Electrode active composition, preparation method thereof, electrode, battery, and apparatus |
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