CN108306020A - A kind of dispersing method of lithium ion battery conductive agent - Google Patents
A kind of dispersing method of lithium ion battery conductive agent Download PDFInfo
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- CN108306020A CN108306020A CN201810079754.9A CN201810079754A CN108306020A CN 108306020 A CN108306020 A CN 108306020A CN 201810079754 A CN201810079754 A CN 201810079754A CN 108306020 A CN108306020 A CN 108306020A
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- conductive agent
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
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- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention relates to a kind of dispersing methods of lithium ion battery conductive agent, include the following steps：Prepare conductive agent suspended substance；Prepare positive main material slurry；Prepare cathode main material slurry；Prepare anode sizing agent；Prepare negative electrode slurry.Advantageous effect of the present invention：The present invention passes through second batch method, conductive agent is first individually configured to evenly dispersed stable suspersion system by using solid dispersion, conductive agent slurry is added in positive and negative electrode main material slurry system again, can solve the problems, such as that the conductive agent difficulty of Large ratio surface is uniformly dispersed；And conductive agent slurry can configure in advance, be directly added into when needing, and can shorten the mixing time needed for dispersed electro-conductive agent, improve production efficiency.
Description
Technical field
The present invention relates to lithium ion battery processing technique field more particularly to a kind of dispersion sides of lithium ion battery conductive agent
Method.
Background technology
Due to being mostly transition metal oxide or transition metal phosphorus currently used for the positive electrode active materials of lithium ion battery
Hydrochlorate, they are all semiconductor or insulator, and electric conductivity is poor, in order to ensure that lithium ion cell electrode has good charge and discharge
Electrical property, so a certain amount of conductive materials would generally be added when pole piece makes, between active substance, active matter
Play the role of collecting micro-current between matter and collector to reduce the contact resistance of electrode, accelerates the rate travel of electronics.Together
When, migration rate of the lithium ion battery in electrode material can be effectively improved, it is this to improve the charge-discharge velocity of electrode
Conductive materials are exactly the conductive agent described in us.
Common lithium ion battery conductive agent has carbon black（SP）, electrically conductive graphite（KS-6）, carbon nanotube and carbon nano-fiber
（VGCF）, carbon nanotube（CNT）, graphene conductive agent etc.；But substantially the particularly preferred conductive agent of electric conductivity is all particle spy
Not tiny, specific surface area is especially big, oil factor is bigger, but the requirement for dispersion is relatively high；If disperseing this one side
It does badly, strong conductive agent will not embody particularly excellent effect to electric conductivity in the application of lithium battery again, so
Can conductive agent play its excellent electric conductivity and be heavily dependent on its dispersity in anode and cathode slurry.
Existing traditional lithium-ion battery conductive agent adding method is to add solid conduction agent powder in blending process
Enter in slurry, homogeneously dispersed state is reached under high-speed stirred, but the method is smaller for particle, specific surface area is larger leads
Electric material applicability is poor, its optimum performance is not played so as to cause the conductive agent of function admirable itself.
Invention content
The technical problem to be solved by the present invention is to：A kind of dispersing method of lithium ion battery conductive agent is provided, is solved
Existing conductive agent addition manner is unfavorable for its dispersion, the problem for causing the performance of lithium ion battery relatively low.
The present invention be solve the problems, such as it is set forth above used by technical solution be：
A kind of dispersing method of lithium ion battery conductive agent, includes the following steps：
1）Prepare conductive agent suspended substance：It is put into three maintenance and operations after respectively mixing a certain proportion of conductive agent, dispersant, solvent three
1-6h is stirred, stable conductive agent suspended substance is formed it into the 10-60Hz that revolves round the sun, the rotating speed of rotation 20-65Hz in dynamic mixing machine,
Weight ratio between the conductive agent, dispersant for example under, conductive agent：Dispersant=1：3-1：2, and made conductive agent suspends
The solid content of body is 20-25%；
2）Prepare positive main material slurry：Respectively by a certain amount of N-Methyl pyrrolidone, binder Kynoar, nickel cobalt manganese
Ternary battery material sequentially adds in blender mixing and stirs 1.5h with the rotating speed of 25Hz, and the N-Methyl pyrrolidone,
Counterweight ratio between binder Kynoar, nickel-cobalt-manganese ternary battery material is 3：1:6；
3）Prepare cathode main material slurry：A certain amount of artificial graphite, sodium carboxymethylcellulose, butadiene-styrene rubber are added successively respectively
Enter in blender mixing and 2.5h is stirred with 25Hz rotating speeds, and the artificial graphite, sodium carboxymethylcellulose, butadiene-styrene rubber are matched
Weight ratio is 71：1：4；
4）Prepare anode sizing agent：By step 1）In a certain amount of conductive agent suspended substance obtained, step 2）In obtained one
Anode sizing agent is made after the quantitative positive main material slurry and glue three's mechanical dispersion, and in three-dimensional motion mixer
0.5-2h is stirred with the 20-60Hz that revolves round the sun, rotation 20-65Hz rotating speeds after mixing, anode sizing agent is made；
5）Prepare negative electrode slurry：By step 1）In a certain amount of conductive agent suspended substance obtained, step 3）In obtained one
Negative electrode slurry is made after the quantitative cathode main material slurry and glue three's mechanical dispersion, and in three-dimensional motion mixer
0.5-2h is stirred with the 20-60Hz that revolves round the sun, rotation 20-65Hz rotating speeds after mixing, negative electrode slurry is made；
The step 1）Middle conductive agent is conductive black, electrically conductive graphite powder, Ketjen black, acetylene black, carbon nanotube, Nano carbon fibers
The mixing arbitrarily matched between any one or more in dimension, carbon nanotube, graphene.
The step 1）Middle dispersant is Macrogol 4000, Macrogol 6000, polyvinyl pyrrolidone, acrylic compounds
Any one of polymeric surfactant LBD-1.
The step 1）Middle solvent selects deionized water when oiliness is formulated；Solvent selects N- methyl pyrroles in aqueous timing
Pyrrolidone.
The step 4）Weight ratio between middle conductive agent suspended substance, positive main material slurry is 1：4.8.
The step 5）Weight ratio between middle conductive agent suspended substance, cathode main material slurry is 1：2.5.
The beneficial effects of the present invention are：The present invention, first will be conductive by using solid dispersion by second batch method
Agent is individually configured to evenly dispersed stable suspersion system, then conductive agent slurry is added in positive and negative electrode main material slurry system,
It can solve the problems, such as that the conductive agent difficulty of Large ratio surface is uniformly dispersed；And conductive agent slurry can configure in advance, it is direct when needing
It is added, the mixing time needed for dispersed electro-conductive agent can be shortened, improve production efficiency.
Description of the drawings
Fig. 1 is to be not added with the negative electrode slurry of dispersant in the present invention to scratch design sketch manually；
Fig. 2 is that the negative electrode slurry of addition dispersant and twice dispersing scratches design sketch manually in the present invention.
Specific implementation mode
The embodiment that 1-2 is further illustrated the present invention below in conjunction with the accompanying drawings.
Embodiment 1
1）Prepare conductive agent suspended substance：It is put into three maintenance and operations after respectively mixing a certain proportion of conductive agent, dispersant, solvent three
2h is stirred, stable conductive agent suspended substance, the conduction are formed it into the 15Hz that revolves round the sun, the rotating speed of rotation 35Hz in dynamic mixing machine
Weight ratio between agent, dispersant for example under, conductive agent：Dispersant=1：3, and the solid content of made conductive agent suspended substance is
20%；
2）Prepare positive main material slurry：Respectively by a certain amount of N-Methyl pyrrolidone, binder Kynoar, nickel cobalt manganese
Ternary battery material sequentially adds in blender mixing and stirs 1.5h with the rotating speed of 25Hz, and the N-Methyl pyrrolidone,
Counterweight ratio between binder Kynoar, nickel-cobalt-manganese ternary battery material is 3：1:6；
3）Prepare cathode main material slurry：A certain amount of artificial graphite, sodium carboxymethylcellulose, butadiene-styrene rubber are added successively respectively
Enter in blender mixing and 2.5h is stirred with 25Hz rotating speeds, and the artificial graphite, sodium carboxymethylcellulose, butadiene-styrene rubber are matched
Weight ratio is 71：1：4；
4）Prepare anode sizing agent：By step 1）In a certain amount of conductive agent suspended substance obtained, step 2）In obtained one
Anode sizing agent is made after the quantitative positive main material slurry and glue three's mechanical dispersion, and in three-dimensional motion mixer
0.8h is stirred with the 35Hz that revolves round the sun, rotation 30Hz rotating speeds after mixing, anode sizing agent is made；
5）Prepare negative electrode slurry：By step 1）In a certain amount of conductive agent suspended substance obtained, step 3）In obtained one
Negative electrode slurry is made after the quantitative cathode main material slurry and glue three's mechanical dispersion, and in three-dimensional motion mixer
0.8h is stirred with the 35Hz that revolves round the sun, rotation 30Hz rotating speeds after mixing, negative electrode slurry is made；
The step 1）Middle conductive agent is conductive black.
The step 1）Middle dispersant is Macrogol 4000.
The step 1）Middle solvent is that oiliness formula selects deionized water.
The step 4）Weight ratio between middle conductive agent suspended substance, positive main material slurry is 1：4.8.
The step 5）Weight ratio between middle conductive agent suspended substance, cathode main material slurry is 1：2.5.
Embodiment 2
1）Prepare conductive agent suspended substance：It is put into three maintenance and operations after respectively mixing a certain proportion of conductive agent, dispersant, solvent three
4h is stirred, stable conductive agent suspended substance, the conduction are formed it into the 40Hz that revolves round the sun, the rotating speed of rotation 40Hz in dynamic mixing machine
Weight ratio between agent, dispersant for example under, conductive agent：Dispersant=1：2, and the solid content of made conductive agent suspended substance is
22%；
2）Prepare positive main material slurry：Respectively by a certain amount of N-Methyl pyrrolidone, binder Kynoar, nickel cobalt manganese
Ternary battery material sequentially adds in blender mixing and stirs 1.5h with the rotating speed of 25Hz, and the N-Methyl pyrrolidone,
Counterweight ratio between binder Kynoar, nickel-cobalt-manganese ternary battery material is 3：1：6；
3）Prepare cathode main material slurry：A certain amount of artificial graphite, sodium carboxymethylcellulose, butadiene-styrene rubber are added successively respectively
Enter in blender mixing and 2.5h is stirred with 25Hz rotating speeds, and the artificial graphite, sodium carboxymethylcellulose, butadiene-styrene rubber are matched
Weight ratio is 71：1：4；
4）Prepare anode sizing agent：By step 1）In a certain amount of conductive agent suspended substance obtained, step 2）In obtained one
Anode sizing agent is made after the quantitative positive main material slurry and glue three's mechanical dispersion, and in three-dimensional motion mixer
1h is stirred with the 35Hz that revolves round the sun, rotation 50Hz rotating speeds after mixing, anode sizing agent is made；
5）Prepare negative electrode slurry：By step 1）In a certain amount of conductive agent suspended substance obtained, step 3）In obtained one
Negative electrode slurry is made after the quantitative cathode main material slurry and glue three's mechanical dispersion, and in three-dimensional motion mixer
1h is stirred with the 35Hz that revolves round the sun, rotation 50Hz rotating speeds after mixing, negative electrode slurry is made；
The step 1）Middle conductive agent is conductive black, electrically conductive graphite powder, three kinds of Ketjen black according to the mixing arbitrarily matched.
The step 1）Middle dispersant is polyvinyl pyrrolidone.
The step 1）Middle solvent is aqueous with selection N-Methyl pyrrolidone.
The step 4）Weight ratio between middle conductive agent suspended substance, positive main material slurry is 1：4.8.
The step 5）Weight ratio between middle conductive agent suspended substance, cathode main material slurry is 1：2.5.
Embodiment 3
1）Prepare conductive agent suspended substance：It is put into three maintenance and operations after respectively mixing a certain proportion of conductive agent, dispersant, solvent three
5h is stirred, stable conductive agent suspended substance, the conduction are formed it into the 60Hz that revolves round the sun, the rotating speed of rotation 65Hz in dynamic mixing machine
Weight ratio between agent, dispersant for example under, conductive agent：Dispersant=1：2, and the solid content of made conductive agent suspended substance is
25%；
2）Prepare positive main material slurry：Respectively by a certain amount of N-Methyl pyrrolidone, binder Kynoar, nickel cobalt manganese
Ternary battery material sequentially adds in blender mixing and stirs 1.5h with the rotating speed of 25Hz, and the N-Methyl pyrrolidone,
Counterweight ratio between binder Kynoar, nickel-cobalt-manganese ternary battery material is 3：1:6；
3）Prepare cathode main material slurry：A certain amount of artificial graphite, sodium carboxymethylcellulose, butadiene-styrene rubber are added successively respectively
Enter in blender mixing and 2.5h is stirred with 25Hz rotating speeds, and the artificial graphite, sodium carboxymethylcellulose, butadiene-styrene rubber are matched
Weight ratio is 71：1：4；
4）Prepare anode sizing agent：By step 1）In a certain amount of conductive agent suspended substance obtained, step 2）In obtained one
Anode sizing agent is made after the quantitative positive main material slurry and glue three's mechanical dispersion, and in three-dimensional motion mixer
2h is stirred with the 60Hz that revolves round the sun, rotation 62Hz rotating speeds after mixing, anode sizing agent is made；
5）Prepare negative electrode slurry：By step 1）In a certain amount of conductive agent suspended substance obtained, step 3）In obtained one
Negative electrode slurry is made after the quantitative cathode main material slurry and glue three's mechanical dispersion, and in three-dimensional motion mixer
2h is stirred with the 60Hz that revolves round the sun, rotation 62Hz rotating speeds after mixing, negative electrode slurry is made；
The step 1）Middle conductive agent is carbon nanotube.
The step 1）Middle dispersant is acrylic polymer surfactant LBD-1.
The step 1）In be it is aqueous with select N-Methyl pyrrolidone.
The step 4）Weight ratio between middle conductive agent suspended substance, positive main material slurry is 1：4.8.
The step 5）Weight ratio between middle conductive agent suspended substance, cathode main material slurry is 1：2.5.
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art,
It still can be with technical scheme described in the above embodiments is modified, or is carried out to which part technical characteristic etc.
With replacing, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this
Within the protection domain of invention.
Claims (6)
1. a kind of dispersing method of lithium ion battery conductive agent, which is characterized in that include the following steps：
1）Prepare conductive agent suspended substance：It is put into three maintenance and operations after respectively mixing a certain proportion of conductive agent, dispersant, solvent three
1-6h is stirred, stable conductive agent suspended substance is formed it into the 10-60Hz that revolves round the sun, the rotating speed of rotation 20-65Hz in dynamic mixing machine,
Weight ratio between the conductive agent, dispersant for example under, conductive agent：Dispersant=1：3-1：2, and made conductive agent suspends
The solid content of body is 20-25%；
2）Prepare positive main material slurry：Respectively by a certain amount of N-Methyl pyrrolidone, binder Kynoar, nickel cobalt manganese
Ternary battery material sequentially adds in blender mixing and stirs 1.5h with the rotating speed of 25Hz, and the N-Methyl pyrrolidone,
Counterweight ratio between binder Kynoar, nickel-cobalt-manganese ternary battery material is 3：1:6；
3）Prepare cathode main material slurry：A certain amount of artificial graphite, sodium carboxymethylcellulose, butadiene-styrene rubber are added successively respectively
Enter in blender mixing and 2.5h is stirred with 25Hz rotating speeds, and the artificial graphite, sodium carboxymethylcellulose, butadiene-styrene rubber are matched
Weight ratio is 71：1：4；
4）Prepare anode sizing agent：By step 1）In a certain amount of conductive agent suspended substance obtained, step 2）In obtained one
Anode sizing agent is made after the quantitative positive main material slurry and glue three's mechanical dispersion, and in three-dimensional motion mixer
0.5-2h is stirred with the 20-60Hz that revolves round the sun, rotation 20-65Hz rotating speeds after mixing, anode sizing agent is made；
5）Prepare negative electrode slurry：By step 1）In a certain amount of conductive agent suspended substance obtained, step 3）In obtained one
Negative electrode slurry is made after the quantitative cathode main material slurry and glue three's mechanical dispersion, and in three-dimensional motion mixer
0.5-2h is stirred with the 20-60Hz that revolves round the sun, rotation 20-65Hz rotating speeds after mixing, negative electrode slurry is made.
2. a kind of dispersing method of lithium ion battery conductive agent as described in claim 1, it is characterised in that：The step 1）
Middle conductive agent is conductive black, electrically conductive graphite powder, Ketjen black, acetylene black, carbon nanotube, carbon nano-fiber, carbon nanotube, graphite
The mixing arbitrarily matched between any one or more in alkene.
3. a kind of dispersing method of lithium ion battery conductive agent as described in claim 1, it is characterised in that：The step 1）
Middle dispersant is Macrogol 4000, Macrogol 6000, polyvinyl pyrrolidone, acrylic polymer surfactant LBD-
Any one of 1.
4. a kind of dispersing method of lithium ion battery conductive agent as described in claim 1, it is characterised in that：The step 1）
Middle solvent selects deionized water when oiliness is formulated；Solvent selects N-Methyl pyrrolidone in aqueous timing.
5. a kind of dispersing method of lithium ion battery conductive agent as described in claim 1, it is characterised in that：The step 4）
Weight ratio between middle conductive agent suspended substance, positive main material slurry is 1：4.8.
6. a kind of dispersing method of lithium ion battery conductive agent as described in claim 1, it is characterised in that：The step 5）
Weight ratio between middle conductive agent suspended substance, cathode main material slurry is 1：2.5.
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| CN201810079754.9A CN108306020A (en) | 2018-01-26 | 2018-01-26 | A kind of dispersing method of lithium ion battery conductive agent |
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| CN201810079754.9A CN108306020A (en) | 2018-01-26 | 2018-01-26 | A kind of dispersing method of lithium ion battery conductive agent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109817889A (en) * | 2019-01-24 | 2019-05-28 | 佛山市实达科技有限公司 | A kind of preparation method of lithium ion battery positive electrode slurry |
| CN117039125A (en) * | 2023-08-10 | 2023-11-10 | 广东钠壹新能源科技有限公司 | Sodium ion battery, sodium ion battery anode slurry and preparation method thereof |
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