CN111551523A - Method for rapidly evaluating dispersion performance of positive and negative electrode slurry of battery - Google Patents
Method for rapidly evaluating dispersion performance of positive and negative electrode slurry of battery Download PDFInfo
- Publication number
- CN111551523A CN111551523A CN202010425131.XA CN202010425131A CN111551523A CN 111551523 A CN111551523 A CN 111551523A CN 202010425131 A CN202010425131 A CN 202010425131A CN 111551523 A CN111551523 A CN 111551523A
- Authority
- CN
- China
- Prior art keywords
- slurry
- battery
- negative electrode
- stirred
- dispersion
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/51—Scattering, i.e. diffuse reflection within a body or fluid inside a container, e.g. in an ampoule
-
- 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
-
- 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
Abstract
The invention belongs to the field of batteries and performance evaluation methods thereof, and particularly relates to a method for rapidly evaluating the dispersion performance of positive and negative electrode slurry of a battery, which comprises the following steps: standing the stirred battery electrode slurry in high vacuum for 30-60 min; the method comprises the steps of taking slurry by a pipette to fill a transparent quartz sample bottle, placing the sample bottle filled with the slurry to be detected into a light intensity detection instrument, scanning the sample bottle from bottom to top by using light with the wavelength of 800-plus-900 nm to obtain light intensity values of different heights of the slurry, calculating the value of a dispersion uniformity index alpha by using light intensity value data to obtain a light intensity average value of the slurry to be detected and the dispersion uniformity index alpha, and rapidly evaluating the dispersion performance of the positive and negative electrode slurries of the battery according to alpha.
Description
Technical Field
The invention belongs to the field of batteries and performance evaluation methods thereof, and particularly relates to a method for rapidly evaluating dispersion performance of positive and negative electrode slurry of a battery.
Background
The influence degree of the stirring, mixing and dispersing process of materials in the preparation process of the battery on the quality of a product in the whole production process of the lithium ion battery is more than 30 percent, and the process is the most important link in the whole production process. Manufacturing an electrode of a lithium ion battery, wherein positive electrode slurry comprises an adhesive, a conductive agent, a positive electrode material and the like; the negative electrode slurry is composed of a binder, graphite carbon powder and the like. The preparation of the positive electrode slurry and the negative electrode 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. In the positive electrode slurry and the negative electrode slurry, the dispersibility and the uniformity of the granular active substances directly influence the movement of lithium ions between two electrodes of the battery, so that the mixing and the dispersion of the slurry of each pole piece material in the production of the lithium ion battery are very important, and the quality of the dispersion of the slurry directly influences the quality of the subsequent production of the lithium ion battery and the performance of the product thereof.
The traditional method for evaluating the stirring dispersion performance is a method of scraper fineness meter test, gap test viscosity test and the like, and because the manual measurement mode has more influence factors, the slurry dispersion performance cannot be accurately and scientifically reflected.
Disclosure of Invention
The invention aims to disclose a method for rapidly evaluating the dispersion performance of positive and negative electrode slurry of a battery, which is characterized by comprising the following steps:
standing the stirred battery electrode slurry in high vacuum for 30-60 min; taking the slurry by a pipette to fill in a transparent quartz sample bottle, putting the sample bottle filled with the slurry to be detected into a light intensity detection instrument, scanning the sample bottle from bottom to top by using light with the wavelength of 800-
And calculating the value of the dispersion uniformity index alpha to obtain the light intensity average value of the slurry to be detected and the dispersion uniformity index alpha, and quickly evaluating the dispersion performance of the battery anode and cathode slurry according to the alpha.
Preferably, alpha is less than 0.4, which indicates that the dispersion uniformity of the slurry is good; alpha is more than 0.4 and less than 0.5, which indicates that the dispersion uniformity of the slurry is general; alpha is more than 0.6, which indicates that the dispersion uniformity of the slurry is poor.
Preferably, the battery electrode is a battery positive electrode or a battery negative electrode.
Preferably, when the battery electrode is a battery positive electrode, the preparation of the slurry includes: the positive electrode material layer comprises the following components in percentage by mass: and (2) conducting carbon black (SP), namely 2.5% of polyvinylidene fluoride (PVDF) to 95.5:2:2.5, adding polyvinylidene fluoride (PVDF) serving as a binder into N-methyl pyrrolidone serving as a solvent, stirring in vacuum under the condition of circulating water cooling, adding superconducting carbon, stirring, adding lithium nickel manganese cobalt, stirring, standing the obtained slurry in vacuum to obtain anode material slurry, wherein the solid content of the anode material slurry is (68 +/-3)%.
Preferably, when the battery electrode is a battery positive electrode, the preparation of the slurry specifically includes: the positive electrode material layer comprises the following components in percentage by mass: lithium Nickel Cobalt Manganese (NCM), conductive carbon black (SP), 2.5% of polyvinylidene fluoride (PVDF), 95.5:2:2.5, 5kg of total dry powder of the positive electrode, taking N-methyl pyrrolidone as a solvent, adding polyvinylidene fluoride serving as a binder into the N-methyl pyrrolidone, carrying out vacuum stirring for 3 hours under the condition of circulating water cooling, then adding superconducting carbon, stirring for 2 hours, then adding lithium nickel manganese cobalt, stirring for 4 hours, standing the obtained slurry in vacuum to obtain positive electrode material slurry, wherein the solid content of the positive electrode material slurry is (68 +/-3)%.
Preferably, when the battery electrode is a battery negative electrode, the preparation of the slurry includes: according to the artificial graphite: conducting carbon black (SP), thickening agent carboxymethylcellulose sodium (CMC), binder Styrene Butadiene Rubber (SBR) 95.5:1:1.5:2, deionized water is used as a medium to prepare negative electrode slurry, the thickening agent carboxymethylcellulose sodium is added into the deionized water to be stirred, then the conducting carbon black is added to be stirred, artificial graphite is added to be stirred, then the binding agent styrene butadiene rubber is added to be stirred, the obtained slurry is placed in vacuum to obtain negative electrode material slurry, and the solid content of the negative electrode material slurry is (48 +/-2)%.
Preferably, when the battery electrode is a battery negative electrode, the preparation of the slurry specifically includes: according to the artificial graphite: conductive carbon black (SP), thickening agent carboxymethylcellulose sodium (CMC), binder Styrene Butadiene Rubber (SBR) 95.5:1:1.5:2, the total amount of negative electrode slurry dry powder is 3kg, deionized water is used as a medium to prepare negative electrode slurry, the thickening agent carboxymethylcellulose sodium is added into the deionized water and stirred for 2-3 hours, then the conductive carbon black is added and stirred for 1.5-2 hours, then artificial graphite is added and stirred for 2-3 hours, then the binding agent styrene butadiene rubber is added and stirred for 30min, the obtained slurry is placed in vacuum to obtain negative electrode material slurry, and the solid content of the negative electrode material slurry is (48 +/-2)%.
Preferably, the light intensity detecting instrument is a formaldehyde multiple light scattering instrument.
The invention also discloses application of the method in testing the dispersion performance of the positive and negative electrode slurry of the lithium ion battery pole piece.
Preferably, the method can rapidly evaluate the dispersion uniformity of the positive and negative electrode slurry of the battery pole piece, is used for optimizing the manufacturing process of the lithium ion battery pole piece, and provides reference for establishing the relationship between the process parameters, the dispersion performance of the slurry and the battery performance.
Compared with the prior art, the invention has the unexpected effects that:
(1) the dispersion uniformity of the slurry can be evaluated quickly, each process of the slurry in each tank can be evaluated quickly and accurately, and the control capability and the detection efficiency of the production process are improved, so that the performance requirement of the battery is met;
(2) the method overcomes the defect that the detection method for detecting the dispersion performance of the slurry of the existing battery is relatively poor, and the electrical property of the battery prepared by the qualified slurry detected by the method is greatly improved.
Detailed Description
The present invention will be further described with reference to the following examples. The described embodiments and their results are only intended to illustrate the invention and should not be taken as limiting the invention described in detail in the claims.
Example 1
(1) Preparing positive electrode material slurry: the positive electrode material layer comprises the following components in percentage by mass: conducting carbon black (SP), namely 2.5 percent of polyvinylidene fluoride (PVDF), 95.5:2:2.5, 5kg of total dry powder of the positive electrode, taking N-methyl pyrrolidone as a solvent, adding polyvinylidene fluoride serving as a binder into the N-methyl pyrrolidone, carrying out vacuum stirring for 3 hours under the condition of circulating water cooling, then adding superconducting carbon, stirring for 2 hours, then adding lithium nickel manganese cobalt, stirring for 4 hours, and standing the obtained slurry in vacuum to obtain positive electrode material slurry, wherein the solid content of the positive electrode material slurry is (68 +/-3)%;
(2) preparing anode material slurry: according to the artificial graphite: conductive carbon black (SP), thickening agent carboxymethylcellulose sodium (CMC), binder Styrene Butadiene Rubber (SBR) 95.5:1:1.5:2, the total amount of negative electrode slurry dry powder is 3kg, deionized water is used as a medium to prepare negative electrode slurry, thickening agent carboxymethylcellulose sodium is added into deionized water and stirred for 2 hours, then conductive carbon black is added and stirred for 2 hours, artificial graphite is added and stirred for 3 hours, then adhesive styrene butadiene rubber is added and stirred for 30 minutes, the obtained slurry is placed in vacuum to obtain negative electrode material slurry, and the solid content of the negative electrode material slurry is (48 +/-2)%;
(3) testing of the slurry: standing the stirred slurry in high vacuum for 30 min; respectively filling the positive electrode slurry and the negative electrode slurry into a 20ml quartz sample bottle by using a pipette, putting the sample bottle into a light intensity detection instrument (a formaldehyde multiple light scattering instrument), scanning the light intensity value of the slurry from bottom to top by using light with the wavelength of 880nm, and using the light intensity value data
Calculating the value of a dispersion uniformity index alpha to obtain the average value of the light intensity of the positive electrode slurry in the step (1) of 2.35 and the dispersion uniformity index alpha of 0.3; the average light intensity value of the negative electrode slurry in the step (2) is 4.45, the dispersion uniformity index a is 0.37, and the result is shown in table 1;
(4) and (3) testing the battery performance: uniformly coating the positive electrode slurry prepared in the step (1) on the surface of an aluminum foil, drying and pressing to obtain a positive electrode piece; and (3) uniformly coating the negative electrode slurry prepared in the step (2) on the surface of copper foil, drying and pressing to obtain a negative electrode pole piece. Winding the positive and negative plates and the polypropylene film into a pole core of a cylindrical lithium ion battery, then injecting a non-aqueous electrolyte (1.2mol/L of EC/EMC/DMC/LiPF6 system electrolyte) into a battery shell in an amount of 2.8g/Ah, sealing to prepare the lithium ion battery, measuring the 1C capacity of the battery, and calculating the first charging and discharging efficiency according to the first charging and discharging efficiency which is the partial volume first discharging capacity/(formation charging capacity + partial volume first charging capacity); the battery is charged and discharged at 25 ℃ under 1C, the battery is cycled for 500 times, the capacity of the battery after cycling is measured, and the capacity residual rate of the battery is calculated, wherein the first efficiency of the battery in example 1 is 88.2 percent, and the capacity retention rate is 88.2 percent when the battery is cycled for 500 times; the results are shown in Table 2.
Example 2
In the same manner as in example 1, only the anode material slurry of step (2) was prepared by changing to the following method: according to the artificial graphite: conductive carbon black (SP), thickening agent carboxymethylcellulose sodium (CMC), binder Styrene Butadiene Rubber (SBR) 95.5:1:1.5:2, the total amount of negative electrode slurry dry powder is 3kg, deionized water is used as a medium to prepare negative electrode slurry, thickening agent carboxymethylcellulose sodium is added into deionized water and stirred for 3 hours, then conductive carbon black is added and stirred for 2 hours, artificial graphite is added and stirred for 2 hours, then adhesive styrene butadiene rubber is added and stirred for 30 minutes, the obtained slurry is placed in vacuum to obtain negative electrode material slurry, and the solid content of the negative electrode material slurry is (48 +/-2)%;
according to the test of the slurry in the step (3) in the example 1, the average light intensity value of the negative electrode slurry in the step (2) in the example 2 is 4.32, the dispersion uniformity index alpha is 0.45, and the result is shown in table 1;
according to the battery performance test of the step (4) in the embodiment 1, the negative electrode slurry prepared in the step (2) in the embodiment 2 is uniformly coated on the surface of the copper foil, and is dried and pressed to obtain a negative electrode piece; the other positive electrode materials are the same as those in the embodiment 1, and the first efficiency of the battery in the embodiment 2 is 87.1 percent and the capacity retention rate is 85.7 percent when the battery is cycled for 500 times according to the method in the step (4) in the embodiment 1; the results are shown in Table 2.
Example 3
In the same manner as in example 1, only the anode material slurry of step (2) was prepared by changing to the following method: according to the artificial graphite: conductive carbon black (SP), thickening agent carboxymethylcellulose sodium (CMC), binder Styrene Butadiene Rubber (SBR) 95.5:1:1.5:2, the total amount of negative electrode slurry dry powder is 3kg, deionized water is used as a medium to prepare negative electrode slurry, thickening agent carboxymethylcellulose sodium is added into deionized water and stirred for 3 hours, then conductive carbon black is added and stirred for 1.5 hours, artificial graphite is added and stirred for 2 hours, then adhesive styrene butadiene rubber is added and stirred for 30 minutes, the obtained slurry is placed in vacuum to obtain negative electrode material slurry, and the solid content of the negative electrode material slurry is (48 +/-2)%;
according to the test of the slurry in the step (3) in the example 1, the average light intensity value of the negative electrode slurry in the step (2) in the example 3 is 4.07, the dispersion uniformity index alpha is 0.77, and the results are shown in table 1;
according to the battery performance test of the step (4) in the embodiment 1, the negative electrode slurry prepared in the step (2) in the embodiment 3 is uniformly coated on the surface of the copper foil, and is dried and pressed to obtain a negative electrode piece; the other positive electrode materials are the same as those in the embodiment 1, and the first efficiency of the battery in the embodiment 3 is 85.6 percent and the capacity retention rate is 78.6 percent when the battery is cycled for 500 times according to the method in the step (4) in the embodiment 1; the results are shown in Table 2.
Table 1: example 1-3 light intensity average value and Dispersion homogeneity index alpha value of negative electrode slurry in step (2)
Table 2: examples 1-3 results of cell performance test
| Examples | First time efficiency | Retention rate of normal temperature circulating capacity |
| Example 1 | 88.2％ | The capacity retention rate is 88.2 percent when the cycle is performed for 500 times |
| Example 2 | 87.1％ | The capacity retention rate is 85.7 percent when the cycle is performed for 500 times |
| Example 3 | 85.6％ | The capacity retention rate is 78.6 percent when the cycle is performed for 500 times |
The results of the battery performance tests of examples 1-3 show that the batteries made from the slurries of example 1 performed the best, followed by the batteries made from the slurries of examples 2 and 3 performed the worst.
Subsequently, when different anode and cathode slurry alpha is less than 0.4, the slurry dispersion uniformity is the best; when alpha is more than 0.4 and less than 0.5, the dispersion uniformity of the slurry is general; when alpha is greater than 0.6, the dispersion uniformity is poor, and it can be seen from the test process that the dispersion of the battery slurry can be judged only in a few minutes in the slurry test of the embodiments 1 to 3, so that the dispersion can be used as a slurry dispersion performance evaluation judgment standard to guide the battery production to carry out process improvement.
Claims (10)
1. A method for rapidly evaluating dispersion performance of positive and negative electrode slurry of a battery is characterized by comprising the following steps:
standing the stirred battery electrode slurry in high vacuum for 30-60 min; taking the slurry by a pipette to fill in a transparent quartz sample bottle, putting the sample bottle filled with the slurry to be detected into a light intensity detection instrument, scanning the sample bottle from bottom to top by using light with the wavelength of 800-
And calculating the value of the dispersion uniformity index alpha to obtain the light intensity average value of the slurry to be detected and the dispersion uniformity index alpha, and quickly evaluating the dispersion performance of the battery anode and cathode slurry according to the alpha.
2. The method of claim 1, wherein: alpha is less than 0.4, which indicates that the dispersion uniformity of the slurry is good; alpha is more than 0.4 and less than 0.5, which indicates that the dispersion uniformity of the slurry is general; alpha is more than 0.6, which indicates that the dispersion uniformity of the slurry is poor.
3. The method of claim 1, wherein: the battery electrode is a battery anode or a battery cathode.
4. The method of claim 1, wherein: when the battery electrode is a battery anode, the preparation of the slurry comprises the following steps: the positive electrode material layer comprises the following components in percentage by mass: and 2.5% of conductive carbon black, namely polyvinylidene fluoride 2.5% to 95.5:2:2.5, adding polyvinylidene fluoride serving as a binder into N-methyl pyrrolidone serving as a solvent, stirring in vacuum under the condition of circulating water cooling, adding superconducting carbon, stirring, adding nickel cobalt lithium manganate, stirring, standing the obtained slurry in vacuum to obtain anode material slurry, wherein the solid content of the anode material slurry is (68 +/-3)%.
5. The method of claim 1, wherein: when the battery electrode is a battery anode, the preparation of the slurry specifically comprises the following steps: the positive electrode material layer comprises the following components in percentage by mass: and 2.5% of conductive carbon black, namely 2.5% of polyvinylidene fluoride (polyvinylidene fluoride) in the conductive carbon black: 95.5:2:2.5, wherein the total amount of the positive electrode dry powder is 5kg, N-methyl pyrrolidone is used as a solvent, polyvinylidene fluoride serving as a binder is added into the N-methyl pyrrolidone, the mixture is subjected to vacuum stirring for 3 hours under the condition of circulating water cooling, then superconducting carbon is added, the mixture is stirred for 2 hours, then the nickel cobalt lithium manganate is added, the mixture is stirred for 4 hours, the obtained slurry is placed in vacuum to obtain positive electrode material slurry, and the solid content of the positive electrode material slurry is (68 +/-3)%.
6. The method of claim 1, wherein: when the battery electrode is a battery cathode, the preparation of the slurry comprises the following steps: according to the artificial graphite: conducting carbon black, namely thickener carboxymethylcellulose sodium and binder styrene butadiene rubber, wherein the thickener carboxymethylcellulose sodium and the binder are 95.5:1:1.5:2, deionized water is used as a medium to prepare negative electrode slurry, the thickener carboxymethylcellulose sodium is added into the deionized water and stirred, then the conducting carbon black is added and stirred, then artificial graphite is added and stirred, then the binder styrene butadiene rubber is added and stirred, the obtained slurry is placed in vacuum to obtain negative electrode material slurry, and the solid content of the negative electrode material slurry is (48 +/-2)%.
7. The method of claim 1, wherein: when the battery electrode is a battery cathode, the preparation of the slurry specifically comprises the following steps: according to the artificial graphite: the preparation method comprises the following steps of preparing a negative electrode slurry by taking deionized water as a medium, adding thickener carboxymethylcellulose sodium and binder styrene butadiene rubber into the deionized water, stirring for 2-3 hours, adding conductive carbon black, stirring for 1.5-2 hours, adding artificial graphite, stirring for 2-3 hours, adding binder styrene butadiene rubber, stirring for 30 minutes, standing the obtained slurry in vacuum to obtain a negative electrode material slurry, wherein the solid content of the negative electrode material slurry is (48 +/-2)%.
8. The method of claim 1, wherein: the light intensity detecting instrument is a formalization multiple light scattering instrument.
9. The method of any one of claims 1 to 8, applied to the dispersion performance test of positive and negative electrode slurry of a lithium ion battery pole piece.
10. The application of claim 9, wherein the method can rapidly evaluate the dispersion uniformity of the positive and negative electrode slurry of the battery pole piece, is used for optimizing the manufacturing process of the lithium ion battery pole piece, and provides a reference for establishing the relationship between the process parameters and the dispersion performance of the slurry and the battery performance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010425131.XA CN111551523A (en) | 2020-05-19 | 2020-05-19 | Method for rapidly evaluating dispersion performance of positive and negative electrode slurry of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010425131.XA CN111551523A (en) | 2020-05-19 | 2020-05-19 | Method for rapidly evaluating dispersion performance of positive and negative electrode slurry of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111551523A true CN111551523A (en) | 2020-08-18 |
Family
ID=71998833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010425131.XA Pending CN111551523A (en) | 2020-05-19 | 2020-05-19 | Method for rapidly evaluating dispersion performance of positive and negative electrode slurry of battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111551523A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113484203A (en) * | 2021-07-27 | 2021-10-08 | 江西安驰新能源科技有限公司 | Method for evaluating screening condition of lithium battery negative electrode slurry |
| CN114914388A (en) * | 2021-02-08 | 2022-08-16 | 泰星能源解决方案有限公司 | Method for producing positive electrode active material mixture and method for testing positive electrode active material mixture |
| WO2022231093A1 (en) * | 2021-04-26 | 2022-11-03 | 주식회사 엘지에너지솔루션 | Method for measuring properties of anode slurry |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1867640A (en) * | 2003-10-22 | 2006-11-22 | 三菱化学株式会社 | Pigment dispersion liquid, process for producing the same, colored resin composition, color filter and liquid crystal display |
| CN101382489A (en) * | 2007-09-07 | 2009-03-11 | 比亚迪股份有限公司 | Method for evaluating stability of slurry |
| RU2610942C1 (en) * | 2015-12-02 | 2017-02-17 | Федеральное государственное унитарное предприятие "ВСЕРОССИЙСКИЙ НАУЧНО-ИССЛЕДОВАТЕЛЬСКИЙ ИНСТИТУТ ОПТИКО-ФИЗИЧЕСКИХ ИЗМЕРЕНИЙ" (ФГУП "ВНИИОФИ") | Method for optical measurement of calculating concentration of dispersed particles in liquid environments and device for its implementation |
| CN108028142A (en) * | 2015-09-18 | 2018-05-11 | 东丽株式会社 | Graphene dispersing solution and its manufacture method, graphene-manufacture method of active agent complex particle and the manufacture method of electrode paste agent |
| CN108169149A (en) * | 2017-11-29 | 2018-06-15 | 合肥国轩高科动力能源有限公司 | A kind of method of glue uniformity in quick detection lithium ion battery |
| CN111077105A (en) * | 2019-12-31 | 2020-04-28 | 银隆新能源股份有限公司 | Method for detecting uniformity of colloidal solution and application |
-
2020
- 2020-05-19 CN CN202010425131.XA patent/CN111551523A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1867640A (en) * | 2003-10-22 | 2006-11-22 | 三菱化学株式会社 | Pigment dispersion liquid, process for producing the same, colored resin composition, color filter and liquid crystal display |
| CN101382489A (en) * | 2007-09-07 | 2009-03-11 | 比亚迪股份有限公司 | Method for evaluating stability of slurry |
| CN108028142A (en) * | 2015-09-18 | 2018-05-11 | 东丽株式会社 | Graphene dispersing solution and its manufacture method, graphene-manufacture method of active agent complex particle and the manufacture method of electrode paste agent |
| RU2610942C1 (en) * | 2015-12-02 | 2017-02-17 | Федеральное государственное унитарное предприятие "ВСЕРОССИЙСКИЙ НАУЧНО-ИССЛЕДОВАТЕЛЬСКИЙ ИНСТИТУТ ОПТИКО-ФИЗИЧЕСКИХ ИЗМЕРЕНИЙ" (ФГУП "ВНИИОФИ") | Method for optical measurement of calculating concentration of dispersed particles in liquid environments and device for its implementation |
| CN108169149A (en) * | 2017-11-29 | 2018-06-15 | 合肥国轩高科动力能源有限公司 | A kind of method of glue uniformity in quick detection lithium ion battery |
| CN111077105A (en) * | 2019-12-31 | 2020-04-28 | 银隆新能源股份有限公司 | Method for detecting uniformity of colloidal solution and application |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114914388A (en) * | 2021-02-08 | 2022-08-16 | 泰星能源解决方案有限公司 | Method for producing positive electrode active material mixture and method for testing positive electrode active material mixture |
| WO2022231093A1 (en) * | 2021-04-26 | 2022-11-03 | 주식회사 엘지에너지솔루션 | Method for measuring properties of anode slurry |
| CN113484203A (en) * | 2021-07-27 | 2021-10-08 | 江西安驰新能源科技有限公司 | Method for evaluating screening condition of lithium battery negative electrode slurry |
| CN113484203B (en) * | 2021-07-27 | 2022-11-29 | 江西安驰新能源科技有限公司 | Method for evaluating screening condition of lithium battery negative electrode slurry |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111551523A (en) | Method for rapidly evaluating dispersion performance of positive and negative electrode slurry of battery | |
| US20180366720A1 (en) | Positive active material and lithium-ion secondary battery | |
| CN108054351A (en) | A kind of lithium ion battery, silicon-carbon cathode material used and preparation method thereof | |
| Wang et al. | Research progress of the electrochemical impedance technique applied to the high-capacity lithium-ion battery | |
| CN110098387B (en) | Lithium phosphate and conductive carbon material coated ternary cathode material and preparation method and application thereof | |
| CN113138345B (en) | Method for evaluating performance of lithium ion battery by using symmetrical battery | |
| CN111438077A (en) | Method for rapidly screening and detecting echelon utilization performance of retired ternary soft package battery | |
| CN101581658A (en) | Method for measuring bonding strength of granules of pole piece active material layer | |
| CN115548482A (en) | Lithium supplementing method, battery preparation method and battery | |
| CN112881925B (en) | Method for testing quick charge performance of anode material | |
| CN114094043A (en) | Method for evaluating cycle performance of lithium battery positive electrode material | |
| CN117169058A (en) | Determination method for wettability of lithium ion battery | |
| CN116936931A (en) | Lithium ion secondary battery and power utilization device | |
| CN115566170B (en) | Preparation method of high-energy-density quick-charging lithium ion battery anode material | |
| JP2009252398A (en) | Inspection method of composition for forming negative electrode active material layer of lithium secondary battery, and manufacturing method of the battery | |
| CN115791909A (en) | Method for detecting silicon-carbon material expansion degree | |
| CN101315415A (en) | Judgment method for quality of battery pole piece to be tested | |
| CN111551572B (en) | Method for rapidly evaluating cycle performance of graphite material in battery | |
| CN113433027B (en) | Performance prediction method of lithium ion battery material | |
| CN114725326B (en) | Positive electrode material, positive electrode plate, lithium ion battery core, lithium ion battery pack and application of lithium ion battery pack | |
| CN117740602A (en) | PAA-containing battery cell, moisture content testing method and baking method | |
| CN116973513A (en) | High-temperature storage performance evaluation method for manganese-based positive electrode material | |
| CN114608996A (en) | Method for detecting electrolyte wetting performance of lithium ion battery | |
| CN114843443A (en) | Method for evaluating structural stability of positive electrode material | |
| CN116207253A (en) | Slurry, pole piece, preparation method of pole piece and 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: 20200818 |