CN112151801A - Lithium ion battery anode slurry and preparation method thereof - Google Patents
Lithium ion battery anode slurry and preparation method thereof Download PDFInfo
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- CN112151801A CN112151801A CN202010997978.5A CN202010997978A CN112151801A CN 112151801 A CN112151801 A CN 112151801A CN 202010997978 A CN202010997978 A CN 202010997978A CN 112151801 A CN112151801 A CN 112151801A
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 239000006256 anode slurry Substances 0.000 title claims abstract description 26
- 238000003756 stirring Methods 0.000 claims abstract description 69
- 239000006258 conductive agent Substances 0.000 claims abstract description 51
- 239000003292 glue Substances 0.000 claims abstract description 38
- 239000011812 mixed powder Substances 0.000 claims abstract description 33
- 239000002002 slurry Substances 0.000 claims abstract description 33
- 238000002156 mixing Methods 0.000 claims abstract description 25
- 239000002904 solvent Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000011230 binding agent Substances 0.000 claims abstract description 10
- 238000004537 pulping Methods 0.000 claims abstract description 10
- 239000013543 active substance Substances 0.000 claims abstract description 7
- 239000013557 residual solvent Substances 0.000 claims abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 50
- 239000002041 carbon nanotube Substances 0.000 claims description 40
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 37
- 239000002033 PVDF binder Substances 0.000 claims description 26
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 26
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 22
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 10
- 239000011267 electrode slurry Substances 0.000 claims description 9
- 229910021389 graphene Inorganic materials 0.000 claims description 9
- 239000002270 dispersing agent Substances 0.000 claims description 7
- 239000006257 cathode slurry Substances 0.000 claims description 5
- OTYYBJNSLLBAGE-UHFFFAOYSA-N CN1C(CCC1)=O.[N] Chemical group CN1C(CCC1)=O.[N] OTYYBJNSLLBAGE-UHFFFAOYSA-N 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 239000011149 active material Substances 0.000 claims description 3
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical group CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 21
- 239000002131 composite material Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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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 a lithium ion battery anode slurry and a preparation method thereof, wherein the preparation method of the lithium ion battery anode slurry comprises the following steps: preparing glue solution: mixing a solvent and a binder and uniformly stirring to obtain a glue solution; preparing mixed powder: mixing and uniformly stirring the active substance and the conductive agent to obtain mixed powder; mixing and pulping: and sequentially adding the residual solvent, the glue solution and the nano conductive agent into the mixed powder and uniformly stirring to obtain the anode slurry. According to the preparation method of the lithium ion battery anode slurry, the nano conductive agent slurry is directly added into the mixed powder, so that the stirring and dispersing processes of adding the nano conductive agent slurry into the glue solution are reduced, the operation steps are simplified, and the risk caused by difficulty in maintaining the slurry after mixing the nano conductive agent and the glue solution is reduced.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion battery anode slurry and a preparation method thereof.
Background
With the increasing demand for energy conservation and environmental protection, lithium ion batteries are receiving attention because of their high efficiency. In short decades, lithium ion batteries have been widely used in various fields such as 3C products, electronic devices, new energy vehicles, and the like. However, how to improve the electrical performance of lithium ion batteries is one of the long-term trends. However, the conductivity of the commonly used lithium ion battery positive active material is poor, and often needs to be improved by adding a conductive agent, and the conductive agents mainly added in the current lithium ion battery positive system include conductive carbon black, conductive graphite, Carbon Nanotubes (CNTs)), graphene and the like, and the Carbon Nanotubes (CNTs)) and graphene are widely used due to their more excellent conductivity.
The nano conductive agent has a nano size and a large specific surface area, and can efficiently form a conductive network, but the nano conductive agent is easy to agglomerate to influence the performance of the nano conductive agent in a positive electrode system, so that the nano conductive agent commonly used in the industry is Carbon Nanotubes (CNTs)), graphene and composite slurry thereof dispersed in a solvent. In the preparation process of the common cathode slurry at present, the nano conductive agent slurry is usually added into the adhesive liquid for dispersion, and then the adhesive liquid in which the nano conductive agent slurry is dispersed is added into the well-dispersed cathode mixed powder.
Disclosure of Invention
The invention aims to provide an improved lithium ion battery anode slurry and further provides an improved preparation method of the lithium ion battery anode slurry.
The technical scheme adopted by the invention for solving the technical problems is as follows: the preparation method of the positive electrode slurry of the lithium ion battery comprises the following steps:
preparing glue solution: mixing a solvent and a binder and uniformly stirring to obtain a glue solution;
preparing mixed powder: mixing and uniformly stirring the active substance and the conductive agent to obtain mixed powder;
mixing and pulping: and sequentially adding the residual solvent, the glue solution and the nano conductive agent into the mixed powder and uniformly stirring to obtain the anode slurry.
Preferably, in the glue solution preparation and the mixed pulping, the solvent is nitrogen-methyl pyrrolidone;
in the preparation of the glue solution, the binder is polyvinylidene fluoride.
Preferably, in the glue solution preparation, the weight fraction of the binder is 1-3 parts; and/or the weight fraction of the solvent is 10-200 parts.
Preferably, in the glue solution preparation, the stirring speed is 1500rpm to 3000rpm, and the stirring time is 60min to 240 min.
Preferably, in the mixed powder, the active material is one or more of lithium iron phosphate, lithium manganate and lithium cobaltate; and/or the conductive agent is one or more of conductive graphite and conductive carbon black.
Preferably, in the mixed powder, the weight part of the active substance is 90-97 parts;
the conductive agent is 0-5 parts by weight.
Preferably, in the mixed powder, the stirring speed is 30-60 rpm, and the stirring time is 30-90 min;
in the mixed pulping, the revolution speed of stirring is 30-60 rpm, the rotation speed of stirring is 2000-3000 rpm, and the stirring time is 120-240 min.
Preferably, in the mixed pulping, the nano conductive agent slurry comprises a nano conductive agent and a dispersant; wherein, the content of the nano conductive agent is 0.5 to 10 percent; the content of the dispersant is 0 to 1.2 percent.
Preferably, the nano conductive agent comprises one or more of carbon nano tube, graphene and conductive carbon black;
the weight part of the nano conductive agent slurry is 1-3 parts;
the weight part of the rest solvent is 0-100 parts.
The invention also discloses the lithium ion battery anode slurry prepared by the preparation method of the lithium ion battery anode slurry.
The lithium ion battery anode slurry and the preparation method thereof have the following beneficial effects: according to the preparation method of the lithium ion battery anode slurry, the nano conductive agent slurry is directly added into the mixed powder, so that the stirring and dispersing processes of adding the nano conductive agent slurry into the glue solution are reduced, the operation steps are simplified, and the risk caused by difficulty in maintaining the slurry after mixing the nano conductive agent and the glue solution is reduced.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a process flow diagram of a method of making a lithium ion battery positive electrode slurry according to some embodiments of the invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Fig. 1 shows some preferred embodiments of the method of preparing the lithium ion battery positive electrode slurry of the present invention. The preparation method of the lithium ion battery anode slurry can be used for preparing the lithium ion battery anode slurry. The preparation method of the lithium ion battery anode slurry has the advantages of simple and convenient operation and short slurry preparation time. The lithium ion battery anode slurry prepared from the lithium ion battery anode slurry has the advantage of easy storage.
As shown in fig. 1, the preparation method of the lithium ion battery anode slurry comprises the following steps:
preparing glue solution: mixing a solvent and a binder and uniformly stirring to obtain a glue solution; wherein the solvent is N-methyl pyrrolidone; the binder is polyvinylidene fluoride; the binder is 1-3 parts by weight; the weight part of the solvent is 10-200 parts.
Specifically, nitrogen-methyl pyrrolidone and polyvinylidene fluoride are weighed and placed in a stirring container, and stirring is carried out for 60min to 240min under the condition that the stirring speed is 1500rpm to 3000rpm, so as to prepare glue solution with the solid content of 7 percent to 12 percent.
Preparing mixed powder: mixing and uniformly stirring the active substance and the conductive agent to obtain mixed powder; wherein the active substance is one or more of lithium iron phosphate, lithium manganate and lithium cobaltate; the conductive agent is one or more of conductive graphite and conductive carbon black. The mass fraction of the active substance is 90-97 parts; the conductive agent is 0-5 parts by weight.
Specifically, the lithium iron phosphate and the conductive carbon black are weighed and placed in another stirring container for mixing, and the mixture is stirred for 30-90 min at a stirring speed of 30-60 rpm to prepare the mixed powder of the lithium iron phosphate and the conductive carbon black.
Mixing and pulping: and sequentially adding the rest solvent, the glue solution and the nano conductive agent into the mixed powder and uniformly stirring to obtain the anode slurry, wherein the weight part of the nano conductive agent slurry is 1-3 parts, and the weight part of the rest solvent is 0-100 parts. The nano conductive agent slurry comprises a nano conductive agent and a dispersing agent, and the nano conductive agent slurry can be formed by mixing the nano conductive agent and the dispersing agent. The content of the nano conductive agent can be 0.5-10%, and the content of the dispersing agent can be 0-1.2%. The nano conductive agent can be one or more of carbon nano tube, graphene and conductive carbon black. The solvent may be N-methyl pyrrolidone
Specifically, the residual nitrogen-methyl pyrrolidone, the glue solution prepared in the glue solution preparation step and the composite graphene conductive slurry can be sequentially added into the mixed powder, and the mixture is stirred at a stirring speed of 30-60 rpm in revolution and 2000-3000 rpm in rotation for 240min at the stirring time of 120 ℃ and the temperature of 25-35 ℃.
By directly adding the nano conductive agent slurry into the mixed powder, the stirring and dispersing processes of adding the nano conductive agent slurry into the glue solution are reduced, the operation steps are simplified, and the risk caused by difficulty in maintaining the slurry after mixing the nano conductive agent and the glue solution is reduced.
The preparation method of the lithium ion battery anode slurry is explained in detail by combining with the specific embodiment as follows:
example 1
Providing conductive carbon black: carbon Nanotube (CNT) slurry (in terms of Carbon Nanotube (CNT) content): polyvinylidene fluoride (PVDF): n-methyl pyrrolidone; wherein, each material is prepared according to the following proportion: conductive carbon black: carbon Nanotube (CNT) slurry (in terms of Carbon Nanotube (CNT) content): polyvinylidene fluoride (PVDF): n-methylpyrrolidone (NMP): 95:1:2:2: 70. Firstly, mixing and stirring all PVDF and a proper amount of NMP to prepare a glue solution with 10% of PVDF solid content, wherein the stirring speed is 2000rpm, and the stirring time is 120 min; meanwhile, blending all the lithium iron phosphate and the conductive carbon black powder, and uniformly stirring to obtain mixed powder, wherein the stirring speed is 40rpm, and the stirring time is 60 min; and finally, sequentially adding the residual NMP, all glue solutions and Carbon Nano Tube (CNT) slurry into the mixed powder, and stirring, wherein the revolution speed is 40rpm, the rotation speed is 2500rpm, the stirring time is 120min, and the temperature is controlled to be 25-35 ℃.
Example 2
Providing conductive carbon black: carbon Nanotube (CNT) slurry (in terms of Carbon Nanotube (CNT) content): polyvinylidene fluoride (PVDF): n-methyl pyrrolidone; wherein, each material is prepared according to the following proportion: conductive carbon black: carbon Nanotube (CNT) composite graphene conductive paste (in terms of conductive agent content): polyvinylidene fluoride (PVDF): n-methylpyrrolidone (NMP): 96:1:1:2: 75. Firstly, mixing and stirring all PVDF and a proper amount of NMP to prepare a glue solution with 10% of PVDF solid content, wherein the stirring speed is 2000rpm, and the stirring time is 120 min; meanwhile, blending all the lithium iron phosphate and the conductive carbon black powder, and uniformly stirring to obtain mixed powder, wherein the stirring speed is 40rpm, and the stirring time is 60 min; and finally, sequentially adding the residual NMP, all glue solutions and the Carbon Nano Tube (CNT) composite graphene conductive slurry into the mixed powder, and stirring, wherein the revolution speed is 50rpm, the rotation speed is 2000rpm, the stirring time is 120min, and the temperature is controlled to be 25-35 ℃.
Example 3
Providing conductive carbon black: carbon Nanotube (CNT) slurry (in terms of Carbon Nanotube (CNT) content): polyvinylidene fluoride (PVDF): n-methyl pyrrolidone; wherein, each material is prepared according to the following proportion: conductive carbon black: carbon Nanotube (CNT) composite conductive carbon black conductive paste (in terms of conductive agent content): polyvinylidene fluoride (PVDF): n-methylpyrrolidone (NMP): 96:1:1:2: 70. Firstly, mixing and stirring all PVDF and a proper amount of NMP to prepare a glue solution with 10% of PVDF solid content, wherein the stirring speed is 2000rpm, and the stirring time is 120 min; meanwhile, blending all the lithium iron phosphate and the conductive carbon black powder, and uniformly stirring to obtain mixed powder, wherein the stirring speed is 40rpm, and the stirring time is 60 min; and finally, sequentially adding the residual NMP, all glue solutions and the Carbon Nano Tube (CNT) composite conductive carbon black conductive slurry into the mixed powder for stirring, wherein the revolution speed is 50rpm, the rotation speed is 2000rpm, the stirring time is 120min, and the temperature is controlled to be 25-35 ℃.
Comparative example 1
A preparation method of lithium ion battery anode slurry comprises the following steps of preparing lithium iron phosphate according to the following proportion: conductive carbon black: carbon Nanotube (CNT) (based on the content of Carbon Nanotube (CNT)): polyvinylidene fluoride (PVDF): n-methylpyrrolidone (NMP) ═ 95:1.5:1.5:2: 70. Firstly, mixing and stirring all PVDF and a proper amount of NMP to prepare a glue solution with 10% of PVDF solid content, wherein the stirring speed is 2000rpm, and the stirring time is 120 min; then, adding all Carbon Nano Tubes (CNT) into the glue solution and stirring, wherein the revolution speed is 30rpm, the rotation speed is 1200rpm, and the stirring time is 60 min; meanwhile, blending lithium iron phosphate and conductive carbon black powder, and uniformly stirring to obtain mixed powder, wherein the stirring speed is 40rpm, and the stirring time is 60 min; and finally, sequentially adding the residual NMP, all the glue solution and the Carbon Nano Tubes (CNT) into the mixed powder, and stirring at a revolution speed of 50rpm, a rotation speed of 2000rpm for 120min and at a temperature of 25-35 ℃.
The results of comparing the preparation time and the slurry properties of example 1, example 2, and example 3 with those of comparative example 1 are shown in the following table:
| group of | Total time of | Fineness of slurry | Viscosity of the slurry |
| Example 1 | 300min | 5～6μm | 9100 |
| Example 2 | 300min | 6～7μm | 7500 |
| Example 3 | 300min | 7～8μm | 10200 |
| Comparative example 1 | 360min | 7～8μm | 8600 |
Therefore, the preparation time of the anode slurry can be reduced by directly adding the nano conductive agent slurry into the anode mixed powder for dispersion, the performance of the slurry is not influenced, and the preparation method has the characteristics of time saving and simplicity and convenience in operation.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (10)
1. The preparation method of the lithium ion battery anode slurry is characterized by comprising the following steps:
preparing glue solution: mixing a solvent and a binder and uniformly stirring to obtain a glue solution;
preparing mixed powder: mixing and uniformly stirring the active substance and the conductive agent to obtain mixed powder;
mixing and pulping: and sequentially adding the residual solvent, the glue solution and the nano conductive agent into the mixed powder and uniformly stirring to obtain the anode slurry.
2. The method for preparing the lithium ion battery cathode slurry according to claim 1, wherein in the preparation of the glue solution and the mixed pulping, the solvent is nitrogen-methyl pyrrolidone;
in the preparation of the glue solution, the binder is polyvinylidene fluoride.
3. The preparation method of the lithium ion battery positive electrode slurry according to claim 1, wherein in the preparation of the glue solution, the weight fraction of the binder is 1-3 parts; and/or the weight fraction of the solvent is 10-200 parts.
4. The method for preparing the lithium ion battery cathode slurry according to claim 1, wherein in the preparation of the glue solution, the stirring speed is 1500-3000 rpm, and the stirring time is 60-240 min.
5. The method for preparing the positive electrode slurry of the lithium ion battery according to claim 1, wherein in the mixed powder, the active material is one or more of lithium iron phosphate, lithium manganate and lithium cobaltate; and/or the conductive agent is one or more of conductive graphite and conductive carbon black.
6. The method for preparing the positive electrode slurry for the lithium ion battery according to claim 1, wherein the active material is contained in the mixed powder material in an amount of 90 to 97 parts by weight;
the conductive agent is 0-5 parts by weight.
7. The method for preparing the positive electrode slurry for the lithium ion battery according to claim 1, wherein the stirring speed in the mixed powder is 30-60 rpm, and the stirring time is 30-90 min;
in the mixed pulping, the revolution speed of stirring is 30-60 rpm, the rotation speed of stirring is 2000-3000 rpm, and the stirring time is 120-240 min.
8. The method for preparing the lithium ion battery cathode slurry according to claim 1, wherein in the mixed pulping, the nano conductive agent slurry comprises a nano conductive agent and a dispersing agent; wherein, the content of the nano conductive agent is 0.5 to 10 percent; the content of the dispersant is 0 to 1.2 percent.
9. The method for preparing the lithium ion battery cathode slurry according to claim 8, wherein the nano conductive agent comprises one or more of carbon nanotubes, graphene and conductive carbon black;
the weight part of the nano conductive agent slurry is 1-3 parts;
the weight part of the rest solvent is 0-100 parts.
10. A lithium ion battery positive electrode slurry, characterized by being prepared by the method for preparing a lithium ion battery positive electrode slurry according to any one of claims 1 to 9.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113328097A (en) * | 2021-07-06 | 2021-08-31 | 深圳一特科技有限公司 | Improved conductive glue solution for lithium ion battery anode and preparation method and application thereof |
| CN114203990A (en) * | 2021-12-02 | 2022-03-18 | 东莞维科电池有限公司 | Positive electrode lithium supplement slurry and preparation method thereof, positive plate and lithium ion battery |
| CN114597396A (en) * | 2022-03-31 | 2022-06-07 | 福建南平南孚电池有限公司 | Lithium-manganese battery positive electrode powder mixing process |
| CN114843513A (en) * | 2022-04-15 | 2022-08-02 | 珠海鹏辉能源有限公司 | Composite conductive agent, battery slurry, lithium ion battery and preparation method |
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