CN112133911A - Lithium ion battery cathode slurry and preparation method thereof - Google Patents
Lithium ion battery cathode slurry and preparation method thereof Download PDFInfo
- Publication number
- CN112133911A CN112133911A CN202011071023.3A CN202011071023A CN112133911A CN 112133911 A CN112133911 A CN 112133911A CN 202011071023 A CN202011071023 A CN 202011071023A CN 112133911 A CN112133911 A CN 112133911A
- Authority
- CN
- China
- Prior art keywords
- negative electrode
- lithium ion
- ion battery
- slurry
- accounts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 31
- 239000006257 cathode slurry Substances 0.000 title claims abstract description 12
- 238000002360 preparation method Methods 0.000 title description 9
- 238000003756 stirring Methods 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 42
- 239000002002 slurry Substances 0.000 claims abstract description 39
- 239000007773 negative electrode material Substances 0.000 claims abstract description 36
- 239000002562 thickening agent Substances 0.000 claims abstract description 32
- 239000006258 conductive agent Substances 0.000 claims abstract description 29
- 239000011230 binding agent Substances 0.000 claims abstract description 26
- 239000002904 solvent Substances 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000011267 electrode slurry Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 239000003292 glue Substances 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000005054 agglomeration Methods 0.000 claims description 5
- 230000002776 aggregation Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 claims description 3
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical group [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 3
- 239000006230 acetylene black Substances 0.000 claims description 3
- 229910021383 artificial graphite Inorganic materials 0.000 claims description 3
- 239000002041 carbon nanotube Substances 0.000 claims description 3
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 229910021385 hard carbon Inorganic materials 0.000 claims description 3
- 239000003273 ketjen black Substances 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 239000002931 mesocarbon microbead Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 229910021382 natural graphite Inorganic materials 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 3
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 3
- 239000002733 tin-carbon composite material Substances 0.000 claims description 3
- 229910000314 transition metal oxide Inorganic materials 0.000 claims description 3
- 239000002153 silicon-carbon composite material Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 9
- 238000000576 coating method Methods 0.000 abstract description 9
- 239000010406 cathode material Substances 0.000 abstract description 6
- 230000008569 process Effects 0.000 description 9
- 239000007787 solid Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 239000013543 active substance Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
Images
Classifications
-
- 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
- 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
- H01M4/36—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
-
- 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
- H01M2004/027—Negative 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a lithium ion battery cathode slurry, which is prepared by mixing a cathode material and a solvent, wherein the cathode material comprises a cathode main material, a thickening agent, a conductive agent and a binder, and is characterized in that: the negative electrode main material accounts for 95.7-97% of the total weight of the negative electrode material, the thickening agent accounts for 1-1.5% of the total weight of the negative electrode material, and the conductive agent accounts for 0-1.0% of the total weight of the negative electrode material. The binder accounts for 1.5-2.0% of the total weight of the negative electrode material. On the premise of ensuring the stability of the slurry and the cohesiveness of the pole pieces, the proportion of the main material of the negative electrode is improved by adjusting the proportion of the auxiliary material in the slurry, so that the stirring time of the slurry can be shortened, and the coating efficiency is improved.
Description
Technical Field
The invention relates to a lithium ion battery, in particular to a lithium ion battery cathode slurry and a manufacturing method thereof.
Background
The negative electrode slurry of the lithium ion battery mainly comprises a binder, a negative electrode main material and the like. The preparation of the cathode slurry comprises a series of processes of mixing, dissolving, dispersing and the like between liquid and between liquid and solid materials, and the processes are accompanied by changes of temperature, viscosity, environment and the like. The mixing and dispersing process of the lithium ion battery slurry can be divided into a macro mixing process and a micro dispersing process, and the two processes are always accompanied with the whole process of preparing the lithium ion battery slurry.
The slurry after slurry mixing needs to have better stability, which is an important index for ensuring the consistency of the battery in the production process of the battery. Along with the completion of slurry mixing, the stirring stops, and the thick liquids can appear subsiding, flocculation coalescence phenomenons such as, produce the large granule, and this can cause great influence to processes such as follow-up coating. The main parameters characterizing the stability of the slurry are fluidity, viscosity, solid content, density and the like.
The solid content of the slurry is closely related to the stability of the slurry, and the higher the solid content of the slurry is, the higher the viscosity of the slurry is and vice versa in the same process and formula. Within certain ranges, the higher the viscosity, the higher the slurry stability. When the battery is designed, the design of the pole piece is only related to parameters such as surface density, active material density, thickness and the like. The parameters of the pole piece are the result of adjusting the pole piece through a coating machine and a roll squeezer, and the solid content of the sizing agent has no direct influence on the pole piece. Wherein, the improvement of the ratio of main materials in the slurry formula has certain significance for improving the stirring efficiency and the coating efficiency. The higher the proportion of the main material in the formula is, the shorter the stirring time of the slurry is, the less the solvent is consumed, the coating and drying efficiency is improved, and the time is saved. In addition, the slurry with high main material ratio can reduce the thickness of the coating and reduce the internal resistance of the battery. However, if a high ratio of main materials is sought, some problems will be brought about: for example, the peeling strength of the pole piece is reduced after the viscosity reducer is reduced, the multiplying power performance is reduced due to the reduction of the conductive agent, the abrasion of equipment is accelerated, and the like.
At present, in the existing production scheme of my company, the proportion of main materials in the negative electrode slurry mixing formula is not high (the proportion of the main materials of the negative electrode is 95.7%), so that a certain improvement space exists.
Disclosure of Invention
The invention aims to solve the technical problem of providing a lithium ion battery negative electrode slurry and a preparation method thereof, which can reduce the stirring time of the slurry and improve the coating efficiency by adjusting the proportion of auxiliary materials in the slurry and improving the proportion of main materials of a negative electrode on the premise of ensuring the stability of the slurry and the cohesiveness of a pole piece.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the negative electrode material comprises a negative electrode main material, a thickening agent, a conductive agent and a binder, wherein the negative electrode main material accounts for 95.7-97% of the total weight of the negative electrode material, the thickening agent accounts for 1-1.5% of the total weight of the negative electrode material, and the conductive agent accounts for 0-1.0% of the total weight of the negative electrode material. The binder accounts for 1.5-2.0% of the total weight of the negative electrode material.
Preferably, the conductive agent is at least one of acetylene black, conductive carbon black, carbon nanotubes and ketjen black.
Preferably, the negative electrode body is one or a mixture of more of artificial graphite, natural graphite, hard carbon, mesocarbon microbeads, a transition metal oxide carbon composite material, a lithium titanate carbon composite material, silicon carbon and a tin carbon composite material.
Preferably, the thickener is sodium carboxymethylcellulose, and the binder is styrene butadiene rubber.
A manufacturing method of lithium ion battery negative electrode slurry comprises the following steps:
a. mixing the thickening agent and the solvent, and uniformly stirring to obtain a glue solution;
b. adding a negative electrode main material and a conductive agent into a stirring kettle, and uniformly stirring to obtain premixed powder;
c. b, injecting part of the glue solution obtained in the step a into a stirring kettle containing premixed powder, and simultaneously injecting a solvent into the stirring kettle and uniformly stirring to obtain a primary mixed material;
d. c, injecting all the residual glue solution in the step c into the stirring kettle, simultaneously injecting the solvent into the stirring kettle again, and uniformly stirring to obtain a mixture;
e. and (3) injecting a binder into the stirring kettle, uniformly stirring to obtain slurry, then continuously injecting a solvent to adjust the viscosity of the slurry, and finally sieving to obtain the cathode slurry.
Preferably, the thickener and the solvent are mixed in the step a at normal temperature and normal pressure, and the ratio of the thickener is 1.5-2.5%.
Preferably, the thickener and water in step a are mixed uniformly to the extent that no bubbles are evident.
Preferably, in the step b, the negative electrode main material and the conductive agent need to be uniformly mixed to the extent that no obvious agglomeration exists.
Preferably, the mixture of the thickening agent, the negative electrode main material and the conductive agent in the initial mixture obtained in the step c accounts for 60-75%.
Preferably, the solvent injected in all the steps is deionized water; and d, before all the residual glue solution in the step d is injected into the stirring kettle, vacuumizing the stirring kettle.
Compared with the prior art, the lithium ion battery cathode slurry and the preparation method thereof have the advantages that the proportion of the cathode main material in the slurry is improved by adjusting the proportion of the auxiliary material in the slurry on the premise of ensuring the stability, repeatability, electrochemical performance and pole piece cohesiveness of the slurry, and the coating efficiency is further improved. According to the rheological curve, the slurry prepared by the preparation method has the advantages that all substances in the slurry are uniformly dispersed, the consistency of the slurry is good, the agglomeration of the conductive agent is reduced, the processing procedure can be simplified, the content of active substances is improved, and the production efficiency is improved.
Drawings
Fig. 1 is a flow chart of a method for manufacturing a lithium ion battery negative electrode slurry according to the present embodiment;
fig. 2 is a rheological graph of the lithium ion battery negative electrode slurry in the embodiment.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The negative electrode slurry of the lithium ion battery is prepared by mixing a negative electrode material and a solvent, wherein the negative electrode material comprises a negative electrode main material, a thickening agent, a conductive agent and a binder, the negative electrode main material accounts for 95.7-97% of the total weight of the negative electrode material, the thickening agent accounts for 1-1.5% of the total weight of the negative electrode material, and the conductive agent accounts for 0-1.0% of the total weight of the negative electrode material. The binder accounts for 1.5-2.0% of the total weight of the negative electrode material.
Specifically, the conductive agent is at least one of acetylene black, conductive carbon black, carbon nanotubes and ketjen black. The negative electrode body is one or a mixture of more of artificial graphite, natural graphite, hard carbon, mesocarbon microbeads, a transition metal oxide carbon composite material, a lithium titanate carbon composite material and silicon carbon or tin carbon composite material. The thickening agent is sodium carboxymethylcellulose, and the binder is styrene butadiene rubber.
Examples 1,
The lithium ion battery cathode slurry comprises a cathode main material, a thickening agent, a conductive agent and a binder, wherein the content of the binder is reduced, the cathode main material accounts for 96% of the total weight of the cathode material, the thickening agent accounts for 1.3% of the total weight of the cathode material, the conductive agent accounts for 1.0% of the total weight of the cathode material, and the binder accounts for 1.7% of the total weight of the cathode material.
Examples 2,
The negative electrode material of the lithium ion battery comprises a negative electrode main material, a thickening agent and a binder, the conductive agent is removed in the embodiment, the negative electrode main material accounts for 97% of the total weight of the negative electrode material, the thickening agent accounts for 1.3% of the total weight of the negative electrode material, and the binder accounts for 1.7% of the total weight of the negative electrode material.
Examples 3,
The negative electrode material of the lithium ion battery comprises a negative electrode main material, a thickening agent, a conductive agent and a binder, the content of the binder is reduced, the negative electrode main material accounts for 96.3% of the total weight of the negative electrode material, the thickening agent accounts for 1.3% of the total weight of the negative electrode material, and the conductive agent accounts for 0.7% of the total weight of the negative electrode material. The binder accounts for 1.7% of the total weight of the negative electrode material.
Examples 4,
The negative electrode material of the lithium ion battery comprises a negative electrode main material, a thickening agent, a conductive agent and a binder, the content of the binder is reduced, the negative electrode main material accounts for 96.4% of the total weight of the negative electrode material, the thickening agent accounts for 1.3% of the total weight of the negative electrode material, and the conductive agent accounts for 0.6% of the total weight of the negative electrode material. The binder accounts for 1.7% of the total weight of the negative electrode material.
A method for manufacturing a lithium ion battery negative electrode slurry, as shown in the block diagram of fig. 1, includes the following steps:
a. mixing a thickening agent and a solvent at normal temperature and normal pressure, controlling the temperature to be 25 +/-2 ℃ to be the best, and uniformly stirring until no obvious bubbles exist to obtain a glue solution, wherein the proportion of the thickening agent is 1.5-2.5%, and the preferable proportion is 2%.
b. Adding the main negative material and the conductive agent into a stirring kettle, and uniformly stirring until no obvious agglomeration exists to obtain premixed powder;
c. b, injecting part of the glue solution obtained in the step a into a stirring kettle containing premixed powder, and simultaneously injecting a solvent into the stirring kettle and uniformly stirring to obtain a primary mixed material;
d. c, pumping the stirring kettle to be vacuum, then injecting all the residual glue solution in the step c into the stirring kettle, simultaneously injecting the solvent into the stirring kettle again, and uniformly stirring to obtain a mixture;
e. and (3) injecting a binder into the stirring kettle, uniformly stirring to obtain slurry, then continuously injecting a solvent to adjust the viscosity of the slurry, and finally sieving to obtain the cathode slurry.
And c, mixing the thickening agent, the negative main material and the conductive agent in the initial mixture obtained in the step c to obtain a mixture, wherein the mixture accounts for 60-75%, and the solvent injected in all the steps is deionized water.
As shown in fig. 2, the rheological curves of the lithium ion battery negative electrode pastes of examples 1 to 4 prepared by the above-mentioned preparation method are shown.
The comparison of the positive electrode slurry shows that the rheological properties of the slurry are slightly different due to the difference of the material granularity/residual alkali/specific surface area, and the negative electrode slurry has good stability for 72 h.
Compared with the prior art, the lithium ion battery cathode slurry and the preparation method thereof have the advantages that the proportion of the cathode main material in the slurry is improved by adjusting the proportion of the auxiliary material in the slurry on the premise of ensuring the stability, repeatability, electrochemical performance and pole piece cohesiveness of the slurry, and the coating efficiency is further improved. According to the rheological curve, the slurry prepared by the preparation method has the advantages that all substances in the slurry are uniformly dispersed, the consistency of the slurry is good, the agglomeration of the conductive agent is reduced, the processing procedure can be simplified, the content of active substances is improved, and the production efficiency is improved.
Although preferred embodiments of the present invention have been described in detail hereinabove, it should be clearly understood that modifications and variations of the present invention are possible to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The negative electrode slurry of the lithium ion battery is prepared by mixing a negative electrode material and a solvent, wherein the negative electrode material comprises a negative electrode main material, a thickening agent, a conductive agent and a binder, and is characterized in that: the negative electrode main material accounts for 95.7-97% of the total weight of the negative electrode material, the thickening agent accounts for 1-1.5% of the total weight of the negative electrode material, the conductive agent accounts for 0-1.0% of the total weight of the negative electrode material, and the binder accounts for 1.5-2.0% of the total weight of the negative electrode material.
2. The lithium ion battery negative electrode slurry according to claim 1, characterized in that: the conductive agent is at least one of acetylene black, conductive carbon black, carbon nano tubes and Ketjen black.
3. The lithium ion battery negative electrode slurry according to claim 1, characterized in that: the negative electrode body is one or a mixture of more than one of artificial graphite, natural graphite, hard carbon, mesocarbon microbeads, a transition metal oxide carbon composite material, a lithium titanate carbon composite material and a silicon carbon or tin carbon composite material.
4. The lithium ion battery negative electrode slurry according to claim 1, characterized in that: the thickening agent is sodium carboxymethylcellulose, and the binder is styrene butadiene rubber.
5. A manufacturing method of lithium ion battery cathode slurry is characterized by comprising the following steps: the method comprises the following steps:
a. mixing the thickening agent and the solvent, and uniformly stirring to obtain a glue solution;
b. adding a negative electrode main material and a conductive agent into a stirring kettle, and uniformly stirring to obtain premixed powder;
c. b, injecting part of the glue solution obtained in the step a into a stirring kettle containing premixed powder, and simultaneously injecting a solvent into the stirring kettle and uniformly stirring to obtain a primary mixed material;
d. c, injecting all the residual glue solution in the step c into the stirring kettle, simultaneously injecting the solvent into the stirring kettle again, and uniformly stirring to obtain a mixture;
e. and (3) injecting a binder into the stirring kettle, uniformly stirring to obtain slurry, then continuously injecting a solvent to adjust the viscosity of the slurry, and finally sieving to obtain the cathode slurry.
6. The method for manufacturing the lithium ion battery negative electrode slurry according to claim 5, characterized in that: and b, mixing the thickening agent and the solvent in the step a at normal temperature and normal pressure, wherein the ratio of the thickening agent is 1.5-2.5%.
7. The method for manufacturing the lithium ion battery negative electrode slurry according to claim 6, characterized in that: in the step a, the thickening agent and the water need to be uniformly mixed to the extent that no obvious air bubbles exist.
8. The method for manufacturing the lithium ion battery negative electrode slurry according to claim 5, characterized in that: and b, uniformly mixing the main negative electrode material and the conductive agent in the step b to achieve the degree of no obvious agglomeration.
9. The method for manufacturing the lithium ion battery negative electrode slurry according to claim 5, characterized in that: and c, the mixture of the thickening agent, the negative main material and the conductive agent in the initial mixture obtained in the step c accounts for 60-75%.
10. The method for manufacturing the lithium ion battery negative electrode slurry according to claim 5, characterized in that: the solvent injected in all the steps is deionized water; and d, before all the residual glue solution in the step d is injected into the stirring kettle, vacuumizing the stirring kettle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011071023.3A CN112133911A (en) | 2020-10-09 | 2020-10-09 | Lithium ion battery cathode slurry and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011071023.3A CN112133911A (en) | 2020-10-09 | 2020-10-09 | Lithium ion battery cathode slurry and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112133911A true CN112133911A (en) | 2020-12-25 |
Family
ID=73843849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011071023.3A Pending CN112133911A (en) | 2020-10-09 | 2020-10-09 | Lithium ion battery cathode slurry and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112133911A (en) |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157827A (en) * | 2013-05-14 | 2014-11-19 | 深圳华粤宝电池有限公司 | Lithium ion battery negative film and preparation method thereof |
| CN105140521A (en) * | 2015-08-24 | 2015-12-09 | 深圳市斯诺实业发展有限公司 | Preparation method for negative electrode paste of lithium battery |
| CN105185986A (en) * | 2015-08-14 | 2015-12-23 | 江苏腾方新能源科技有限公司 | High-capacity cylindrical 18650 lithium-ion battery and preparation method thereof |
| CN105406039A (en) * | 2015-11-03 | 2016-03-16 | 山东精工电子科技有限公司 | Silicon-carbon anode paste and preparation method thereof |
| CN105406073A (en) * | 2015-12-18 | 2016-03-16 | 山东精工电子科技有限公司 | Lithium ion battery negative pole size and preparation method thereof |
| KR20160039980A (en) * | 2014-10-02 | 2016-04-12 | 주식회사 엘지화학 | Slurry composition for anode and its fabrication method |
| CN105514435A (en) * | 2016-01-28 | 2016-04-20 | 江苏金坛汽车工业有限公司 | Lithium ion battery negative electrode sizing agent and preparation method thereof |
| CN106159266A (en) * | 2016-08-31 | 2016-11-23 | 合肥国轩高科动力能源有限公司 | Preparation method of negative electrode slurry for reducing expansion of lithium ion battery |
| CN106848205A (en) * | 2016-12-25 | 2017-06-13 | 中盐安徽红四方锂电有限公司 | A kind of lithium ion power cell cathode preparation method |
| CN107046131A (en) * | 2017-04-06 | 2017-08-15 | 桑顿新能源科技有限公司 | A kind of LiFePO4 system lithium ion battery and preparation method |
| CN107834048A (en) * | 2017-11-24 | 2018-03-23 | 深圳市比克动力电池有限公司 | Negative electrode of lithium titanate battery slurry and preparation method thereof |
| CN108155379A (en) * | 2017-12-25 | 2018-06-12 | 北京国能电池科技有限公司 | Lithium ion battery suitable for low temperature environment and preparation method thereof |
| CN108428865A (en) * | 2018-03-05 | 2018-08-21 | 天臣新能源研究南京有限公司 | A kind of preparation method of lithium ion battery anode slurry |
| CN108448074A (en) * | 2018-02-05 | 2018-08-24 | 合肥国轩高科动力能源有限公司 | Preparation method of lithium ion battery cathode slurry |
| CN108565393A (en) * | 2018-04-04 | 2018-09-21 | 合肥国轩高科动力能源有限公司 | Slurry mixing method for lithium ion battery negative electrode slurry |
| CN109950485A (en) * | 2019-03-08 | 2019-06-28 | 安徽泰能新能源科技有限公司 | A kind of lithium ion battery silicon oxygen negative electrode slurry and preparation method thereof, battery cathode and lithium ion battery |
| CN111672392A (en) * | 2020-05-29 | 2020-09-18 | 惠州亿纬创能电池有限公司 | Lithium ion battery cathode homogenizing process |
-
2020
- 2020-10-09 CN CN202011071023.3A patent/CN112133911A/en active Pending
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157827A (en) * | 2013-05-14 | 2014-11-19 | 深圳华粤宝电池有限公司 | Lithium ion battery negative film and preparation method thereof |
| KR20160039980A (en) * | 2014-10-02 | 2016-04-12 | 주식회사 엘지화학 | Slurry composition for anode and its fabrication method |
| CN105185986A (en) * | 2015-08-14 | 2015-12-23 | 江苏腾方新能源科技有限公司 | High-capacity cylindrical 18650 lithium-ion battery and preparation method thereof |
| CN105140521A (en) * | 2015-08-24 | 2015-12-09 | 深圳市斯诺实业发展有限公司 | Preparation method for negative electrode paste of lithium battery |
| CN105406039A (en) * | 2015-11-03 | 2016-03-16 | 山东精工电子科技有限公司 | Silicon-carbon anode paste and preparation method thereof |
| CN105406073A (en) * | 2015-12-18 | 2016-03-16 | 山东精工电子科技有限公司 | Lithium ion battery negative pole size and preparation method thereof |
| CN105514435A (en) * | 2016-01-28 | 2016-04-20 | 江苏金坛汽车工业有限公司 | Lithium ion battery negative electrode sizing agent and preparation method thereof |
| CN106159266A (en) * | 2016-08-31 | 2016-11-23 | 合肥国轩高科动力能源有限公司 | Preparation method of negative electrode slurry for reducing expansion of lithium ion battery |
| CN106848205A (en) * | 2016-12-25 | 2017-06-13 | 中盐安徽红四方锂电有限公司 | A kind of lithium ion power cell cathode preparation method |
| CN107046131A (en) * | 2017-04-06 | 2017-08-15 | 桑顿新能源科技有限公司 | A kind of LiFePO4 system lithium ion battery and preparation method |
| CN107834048A (en) * | 2017-11-24 | 2018-03-23 | 深圳市比克动力电池有限公司 | Negative electrode of lithium titanate battery slurry and preparation method thereof |
| CN108155379A (en) * | 2017-12-25 | 2018-06-12 | 北京国能电池科技有限公司 | Lithium ion battery suitable for low temperature environment and preparation method thereof |
| CN108448074A (en) * | 2018-02-05 | 2018-08-24 | 合肥国轩高科动力能源有限公司 | Preparation method of lithium ion battery cathode slurry |
| CN108428865A (en) * | 2018-03-05 | 2018-08-21 | 天臣新能源研究南京有限公司 | A kind of preparation method of lithium ion battery anode slurry |
| CN108565393A (en) * | 2018-04-04 | 2018-09-21 | 合肥国轩高科动力能源有限公司 | Slurry mixing method for lithium ion battery negative electrode slurry |
| CN109950485A (en) * | 2019-03-08 | 2019-06-28 | 安徽泰能新能源科技有限公司 | A kind of lithium ion battery silicon oxygen negative electrode slurry and preparation method thereof, battery cathode and lithium ion battery |
| CN111672392A (en) * | 2020-05-29 | 2020-09-18 | 惠州亿纬创能电池有限公司 | Lithium ion battery cathode homogenizing process |
Non-Patent Citations (1)
| Title |
|---|
| 孙世敏等: "小粒径石墨颗粒对锂离子电池性能影响研究", 《电池工业》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105047854B (en) | A kind of lithium ion battery cathode slurry preparation method | |
| WO2017031885A1 (en) | Preparation method for lithium battery negative-electrode slurry | |
| CN111370672B (en) | Preparation method of negative electrode slurry | |
| CN106684381A (en) | Aqueous positive paste and preparation method thereof | |
| CN106684329A (en) | Dispersion method for positive electrode slurry of lithium ion battery | |
| CN107240674A (en) | A kind of preparation method of cathode of lithium battery slurry | |
| CN105047938A (en) | Preparation method for anode paste of lithium battery | |
| WO2016202167A1 (en) | Lithium titanate negative-electrode slurry for lithium-ion batteries and preparation method therefor | |
| WO2017032155A1 (en) | Preparation method for lithium battery lithium titanate negative electrode slurry | |
| CN113036143A (en) | Preparation method of graphene composite conductive slurry | |
| CN105489844A (en) | Preparation method of lithium ion power battery negative electrode slurry | |
| CN111509223A (en) | Lithium ion battery anode binder and lithium ion battery anode slurry | |
| CN112467082A (en) | Production stirring process for negative electrode graphite slurry of lithium ion battery | |
| CN107611339A (en) | A kind of positive plate of high power lithium ionic cell and preparation method thereof | |
| CN112366318A (en) | Negative electrode slurry and preparation method and application thereof | |
| CN103872306A (en) | Preparation method of lithium titanate negative electrode slurry | |
| CN111484073A (en) | Method for preparing hollow nanorod titanium dioxide cathode material under assistance of ionic liquid | |
| CN108630884A (en) | A kind of lithium ion battery anode slurry preparation method | |
| CN110707318A (en) | Preparation method of lithium titanate battery negative electrode slurry | |
| CN103035908A (en) | Method for preparing negative electrode plate lead plaster for power type lead acid storage battery | |
| WO2024148995A1 (en) | Conductive paste, preparation method for conductive paste, and lithium-ion battery | |
| CN113889607A (en) | Lithium ion battery cathode homogenizing process | |
| CN108878888A (en) | A kind of anode slice of lithium ion battery | |
| CN112838261A (en) | Negative electrode slurry and homogenizing method and application thereof | |
| CN117334846A (en) | Sodium battery slurry preparation method and sodium battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201225 |