CN101038963A - Process for preparing Lithium ionic cell electrode slurry using ultrasonic-mechanical raking combination method - Google Patents
Process for preparing Lithium ionic cell electrode slurry using ultrasonic-mechanical raking combination method Download PDFInfo
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- CN101038963A CN101038963A CNA2007100974687A CN200710097468A CN101038963A CN 101038963 A CN101038963 A CN 101038963A CN A2007100974687 A CNA2007100974687 A CN A2007100974687A CN 200710097468 A CN200710097468 A CN 200710097468A CN 101038963 A CN101038963 A CN 101038963A
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- supersonic
- active material
- electrode slurry
- conductive agent
- charging basket
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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
Abstract
The invention discloses a process for preparing lithium ion battery electrode paste by employing supersonic-mechanical stirring combining method, including following steps: binder and solvent are filled into a material tank to process mechanical stirring treatment with speed of 300 to 400 rpm, and after the binder is fully dissolved, conductive agent is added in, keeping on stirring for 0.5 to 1 hour; the mixed liquid is transferred into a hydrodynamic supersonic generator by a liquid pump for executing supersonic treatment, wherein the outlet pressure of the liquid pump is 0.1 to 2 MPa, the flowing speed is 1 to 40 m, the sound intensity of the supersonic is 180 to 240 dB; the mixed liquid treated by supersonic is returned to the material tank for stirring, in this manner, the mixed liquid needs to be circulated between the supersonic generator and the material tank for 1 to 1.5 hours; at last, battery active material is added into the material tank, going on stirring for 1.5 to 2 hours, and then well-mixed electrode paste can be obtained. The invention principally employs the supersonic cavitation to disperse the agglomerate conductive agent particles in short time, and to prevent agglomeration again thereby realizing high dispersion of the conductive agent in the electrode paste.
Description
Technical field
The present invention relates to the preparation technology of lithium ion battery, specifically, relate to the technology of preparation electrode slurry in the lithium ion battery production.
Background technology
In the lithium ion battery production process, the preparation of electrode slurry is a first step operation.The pulping process that generally uses both at home and abroad is that electrode active material, conductive agent, binding agent, binding agent solvent etc. are joined in the agitator by a certain percentage at present, adopts mechanical agitation that electrode slurry is mixed.Because the particle of conductive agent carbon black commonly used or acetylene black is very little, generally about 50nm, therefore be easy to generate agglomerated particle, and the conductive agent particle agglomeration is serious, electrode slice after tending to cause being coated with ftractures in charge and discharge process, and then causes that the cycle life of battery descends.Though it is certain that present pulping process can play a part the dispersion of conductive agent, poor effect.Also have some pulping process to form the further dispersed electro-conductive agent of method that ball milling, colloid mill are adopted in the back, but effect is also undesirable at slurry.
Summary of the invention
Technical problem to be solved by this invention provides a kind of preparation technology of lithium ion battery electrode sizing agent, can realize the high degree of dispersion of conductive agent in electrode slurry, thereby improves the useful life and the output performance of lithium ion battery.
For this reason, the invention provides a kind of technology of preparing Lithium ionic cell electrode slurry using ultrasonic-mechanical raking combination method, may further comprise the steps:
Handle carrying out mechanical agitation in binding agent and the solvent adding charging basket, mixing speed is 300～400 rev/mins, is stirred to binding agent and dissolves back adding conductive agent fully, continues stirring 0.5～1 hour;
With liquor pump above-mentioned mixed liquor is sent into and to be carried out sonicated in the Hydrokinetic-type ultrasonic generator, the outlet pressure of liquor pump is 0.1～2MPa, and flow rate of liquid is 1～40m
3, the ultrasonic wave sound intensity is 180～240dB;
Mixed liquor after sonicated is sent back in the charging basket and to be continued to stir, and makes mixed liquor ringing 1～1.5 hour between supersonic generator and charging basket;
Battery active material is added the electrode slurry that the continuation ringing obtained mixing after 1.5～2 hours in the charging basket.
Described battery active material can be battery anode active material or battery cathode active material.
The present invention adopts ultrasonic wave and mechanical agitation combination method to prepare lithium ion battery electrode sizing agent, except that mechanical agitation, the ultrasonic cavitation effect that mainly utilizes the Hydrokinetic-type ultrasonic generator to produce, the conductive agent particle of agglomerated scatter at short notice, and scattered conductive agent no longer takes place to reunite again under the effect of solvent and binding agent, thereby has realized the high degree of dispersion of conductive agent in electrode slurry.So just guaranteed in the process of follow-up making electrode, the inside active material particle of electrode slice can with the conductive agent particle between good the contact arranged, the utilance of electrode active material is greatly improved, the internal resistance of cell is minimized, when shortening the battery charging and discharging time, improve the electric weight that charges and discharge of battery, thereby improve the high-power output characteristic of battery.
Description of drawings
Fig. 1 prepares the device schematic diagram of lithium ion battery electrode sizing agent for adopting the present invention;
Fig. 2 is for being coated in the low resolution sem photograph on the aluminium foil by embodiment 1 gained electrode slurry;
Fig. 3 is for being coated in the high resolution scanning Electronic Speculum figure on the aluminium foil by embodiment 1 gained electrode slurry.
Embodiment
Further specify the present invention below in conjunction with drawings and Examples.
The embodiment 1 lithium ion battery preparation technology of anode sizing agent
As shown in Figure 1, from dog-house 1 n-methyl pyrrolidone 100kg and polyvinylidene fluoride 3kg are joined the charging basket 2, open mechanical agitation motor 3, regulating mixing speed is 300 rev/mins, be stirred to polyvinylidene fluoride all after the dissolving, carbon black added continue in the charging basket 2 to stir 1 hour.Then with liquor pump 4 above-mentioned mixed liquor is sent into and carried out sonicated in the Hydrokinetic-type ultrasonic generator 5, the outlet pressure of liquor pump is 0.5MPa, and flow rate of liquid is 15m
3, the ultrasonic wave sound intensity is 180dB.Mixed liquor after sonicated is sent back in the charging basket 2 and to be continued to stir, and makes mixed liquor ringing 1.5 hours between the loop of supersonic generator 5 and charging basket 2 formation.Add LiMn from dog-house 1 at last
2O
4150kg continues the electrode slurry that ringing obtained mixing after 2 hours, opens baiting valve 6 and electrode slurry can be emitted.
The dispersion of embodiment 2 conductive agents in electrode slurry
To be coated in by the electrode slurry that embodiment 1 makes on the aluminium foil, the surface topography of prepared coating be studied by scanning electron microscope sem.Figure 2 shows that the SEM figure when amplifying 200 times, Figure 3 shows that the SEM figure when amplifying 50000 times.As can be seen from Figure 2, at electrode active material LiMn
2O
4Surface coverage layer of even conductive agent material carbon black, carbon black and LiMn are described
2O
4Mix very evenly.In Fig. 3, the bulky grain with regular shape is electrode active material LiMn
2O
4, granule is a carbon black, can be clear that from figure, and each carbon black granules separates, and illustrates that carbon black do not reunite, and this has proved and has adopted the present invention can realize the high degree of dispersion of conductive agent in electrode slurry.
The embodiment 3 lithium ion batteries preparation technology of cathode size
Repeat the step of embodiment 1, difference is positive electrode LiMn
2O
4Change negative material graphite into.
Claims (3)
1. the technology of preparing Lithium ionic cell electrode slurry using ultrasonic-mechanical raking combination method may further comprise the steps:
Handle carrying out mechanical agitation in binding agent and the solvent adding charging basket, mixing speed is 300～400 rev/mins, is stirred to binding agent and dissolves back adding conductive agent fully, continues stirring 0.5～1 hour;
With liquor pump above-mentioned mixed liquor is sent into and to be carried out sonicated in the Hydrokinetic-type ultrasonic generator, the outlet pressure of liquor pump is 0.1～2MPa, and flow rate of liquid is 1～40m
3, the ultrasonic wave sound intensity is 180～240dB;
Mixed liquor after sonicated is sent back in the charging basket and to be continued to stir, and makes mixed liquor ringing 1～1.5 hour between supersonic generator and charging basket;
Battery active material is added the electrode slurry that the continuation ringing obtained mixing after 1.5～2 hours in the charging basket.
2. preparation technology according to claim 1 is characterized in that: described battery active material is a battery anode active material.
3. preparation technology according to claim 1 is characterized in that: described battery active material is the battery cathode active material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100974687A CN101038963A (en) | 2007-05-11 | 2007-05-11 | Process for preparing Lithium ionic cell electrode slurry using ultrasonic-mechanical raking combination method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100974687A CN101038963A (en) | 2007-05-11 | 2007-05-11 | Process for preparing Lithium ionic cell electrode slurry using ultrasonic-mechanical raking combination method |
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| CN101038963A true CN101038963A (en) | 2007-09-19 |
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ID=38889703
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007100974687A Pending CN101038963A (en) | 2007-05-11 | 2007-05-11 | Process for preparing Lithium ionic cell electrode slurry using ultrasonic-mechanical raking combination method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789503A (en) * | 2010-03-15 | 2010-07-28 | 恒正科技（苏州）有限公司 | Method for mixing slurry |
| CN101637756B (en) * | 2009-08-06 | 2011-01-05 | 北京矿冶研究总院 | Ultrasonic wave generating device for pulp treatment by adopting ultrasonic waves |
| CN102148360A (en) * | 2010-02-10 | 2011-08-10 | 中航锂电（洛阳）有限公司 | Slurry mixing process for lithium ion power batteries |
| CN102294192A (en) * | 2010-06-28 | 2011-12-28 | 北京翔奥天竺科技有限公司 | Ultrasonic mixing device |
| CN109802096A (en) * | 2019-01-25 | 2019-05-24 | 安徽益佳通电池有限公司 | A kind of preparation method of lithium ion battery electrode sizing agent |
| CN113130852A (en) * | 2020-01-14 | 2021-07-16 | 丰田自动车株式会社 | Method for producing electrode mixture paste and method for producing nonaqueous secondary battery |
| CN114249908A (en) * | 2021-11-24 | 2022-03-29 | 惠州锂威新能源科技有限公司 | Adhesive applying method for adhesive |
-
2007
- 2007-05-11 CN CNA2007100974687A patent/CN101038963A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101637756B (en) * | 2009-08-06 | 2011-01-05 | 北京矿冶研究总院 | Ultrasonic wave generating device for pulp treatment by adopting ultrasonic waves |
| CN102148360A (en) * | 2010-02-10 | 2011-08-10 | 中航锂电（洛阳）有限公司 | Slurry mixing process for lithium ion power batteries |
| CN101789503A (en) * | 2010-03-15 | 2010-07-28 | 恒正科技（苏州）有限公司 | Method for mixing slurry |
| CN102294192A (en) * | 2010-06-28 | 2011-12-28 | 北京翔奥天竺科技有限公司 | Ultrasonic mixing device |
| WO2012000351A1 (en) * | 2010-06-28 | 2012-01-05 | 北京翔奥天竺科技有限公司 | Ultrasonic mixing equipment |
| CN109802096A (en) * | 2019-01-25 | 2019-05-24 | 安徽益佳通电池有限公司 | A kind of preparation method of lithium ion battery electrode sizing agent |
| CN113130852A (en) * | 2020-01-14 | 2021-07-16 | 丰田自动车株式会社 | Method for producing electrode mixture paste and method for producing nonaqueous secondary battery |
| CN114249908A (en) * | 2021-11-24 | 2022-03-29 | 惠州锂威新能源科技有限公司 | Adhesive applying method for adhesive |
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