CN105047854A - Preparation method for anode material of lithium ion battery - Google Patents
Preparation method for anode material of lithium ion battery Download PDFInfo
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- CN105047854A CN105047854A CN201510371881.2A CN201510371881A CN105047854A CN 105047854 A CN105047854 A CN 105047854A CN 201510371881 A CN201510371881 A CN 201510371881A CN 105047854 A CN105047854 A CN 105047854A
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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
- H01M4/04—Processes of manufacture in general
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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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Abstract
The invention discloses a preparation method for an anode material of a lithium ion battery. The preparation method comprises the following steps of: adding an active substance and a thickening agent into a blender and stirring the mixture at a revolution speed of 20-25 revolutions per minute and a dispersion speed of 500-800 revolutions per minute; adding a solvent which accounts for 55-60% of powder based on the weight and stirring the mixture at a revolution speed of 20-30 revolutions per minute and a dispersion speed of 800-1,200 revolutions per minute; adding the solvent which accounts for 13-18% of the powder based on the weight and stirring the mixture at the revolution speed of 20-30 revolutions per minute and the dispersion speed of 800-1,200 revolutions per minute; adding a conductive agent and stirring the mixture at the revolution speed of 20-30 revolutions per minute and the dispersion speed of 800-1,200 revolutions per minute; adding an adhesive and remaining solvent and stirring the mixture at a revolution speed of 25-30 revolutions per minute and a dispersion speed of 800-1,000 revolutions per minute; and carrying out vacuumizing and stirring at the revolution speed of 20-25 revolutions per minute. The preparation method has the advantages of short stirring time, and small granularity, uniformity and stability of the paste.
Description
Technical field
The invention belongs to electrochemical field, relate to a kind of lithium ion battery cathode slurry preparation method.
Background technology
Lithium ion battery energy density is large, and have extended cycle life, security performance is good, environmentally friendly, becomes the emphasis of people's research, not only in battery performance, in production efficiency, production cost, is also subject to paying close attention to of people.First operation of producing lithium ion battery is closes slurry, and the quality of closing slurry slurry directly determines quality and the battery with two side terminals of coating, and the efficiency of closing slurry affects the production cycle of lithium battery simultaneously.Current water system cathode size conjunction slurry mode be active material, thickener, conductive agent, binding agent etc. are added successively divide the work again step carry out stirrings close starch, this kind of slurry-stirring process is unfavorable for the dispersed speed of material and conductive agent and contacts, contact-making surface is less and slurry rate of dispersion is inconsistent, and conductive agent is unfavorable for fully being attached to above material; There is the shortcomings such as mixing time long (general mixing time is more than 8 hours), slurry solid content are low, slurry lack of homogeneity, poor electric conductivity, the lifting of serious restriction production capacity, and cause painting process fraction defective more.
Summary of the invention
Object of the present invention solves the above-mentioned problems in the prior art exactly, provides the lithium ion battery cathode slurry preparation method that a kind of mixing time is short, slurry solid content is high, pulp particle degree is little, uniform and stable, improve its electric conductivity.
For solving the problem, technical solution of the present invention is: a kind of lithium ion battery cathode slurry preparation method, and it comprises the following steps:
By weight calculating: active material is Delanium, accounts for 47-53 part; Thickener is sodium cellulose glycolate CMC, accounts for 0.5-1.0 part; Conductive agent is conductive carbon black or electrically conductive graphite or conductive agent super-p, accounts for 0.5-0.7 part; Binding agent is styrene butadiene rubber sbr, accounts for 2.0-3.0 part; Solvent is deionized water, accounts for 45-50 part.
the thickener of the active material of described amount, described amount is added in planetary mixer, revolution speed 20-25 rev/min, under the condition of rate of dispersion 500-800 rev/min, stir 25-30 minute add powder;
add the described solvent accounting for and add powder proportion 55%-60% again, revolution speed 20-30 rev/min, under the condition of rate of dispersion 800-1200 rev/min, stir 50-60 minute;
add the described solvent accounting for and add powder proportion 13%-18% again, revolution speed 20-30 rev/min, under the condition of rate of dispersion 800-1200 rev/min, stir 50-60 minute;
add the conductive agent of described amount again, revolution speed 20-30 rev/min, under the condition of rate of dispersion 800-1200 rev/min, stir 50-60 minute;
add the binding agent of described amount and remaining described solvent again, revolution speed 25-30 rev/min, under the condition of rate of dispersion 800-1000 rev/min, stir 30-40 minute;
continue to stir, under the condition of revolution speed 20-25 rev/min, carry out vacuumizing stirring, stir 20-30 minute, make slurry.
As preferably, whipping process slurry temperature controls at 25-45 DEG C.
As preferably, Zhen Kong Du≤-0.09MPa when vacuumizing stirring.
The invention has the beneficial effects as follows: first active material and thickener are carried out high-viscosity stirring, can effectively prevent from affecting the reunion of thickener after conductive agent adds, shorten mixing time, be easy to slurry and sieve; And the whipping process after conductive agent adds is similarly high-viscosity stirring, the high shear force of high viscosity state ensure that good rate of dispersion effect, makes slurry rate of dispersion more thorough, substantially increases stirring efficiency, effectively shorten mixing time; Also reduce the particle diameter of aggregate in slurry, make slurry obtain same viscosity and need add quantity of solvent minimizing a lot.Have the following advantages: (1) makes water system negative pole close slurry mixing time and foreshortens to 4-5h, carries out closing the mixing time that the technique of starching saves half again, improve the operating efficiency that water system cathode size closes slurry than traditional water system cathode size elder generation glue; (2) make water system cathode size solid content be increased to 50%-55%, solvent use amount can be reduced and obtain better being coated with drying effect; (3) make water system cathode size granularity be decreased to 30-35 μm, granularity is little, improves uniformity and the stability of slurry, makes applying structure more fine and close, and surface area increases, and improves the electric conductivity of slurry.(4) after slurry leaves standstill 10h, slurry without layering, without sedimentation, the good stability of the rate of dispersion of slurry.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1: add 50 parts of Delaniums in planetary mixer, add the CMC of 0.8 part again, revolution speed is 20 revs/min, and rate of dispersion is 500 revs/min, mixing time 30 minutes.And then in planetary mixer, add the deionized water of 28 parts, and to set revolution speed be 25 revs/min, rate of dispersion is 1000 revs/min, mixing time 50 minutes, and whipping process controls slurry temperature at 25-45 DEG C.And then in planetary mixer, add 7 parts of deionized waters, and to set revolution speed be 25 revs/min, rate of dispersion is 1000 revs/min, mixing time 50 minutes.And then in planetary mixer, add the super-p of 0.6 part, and to set revolution speed be 25 revs/min, rate of dispersion is 1000 revs/min, mixing time 60 minutes.And then in planetary mixer, add SBR and the 11 part deionized water of 2.6 parts, and to set revolution speed be 25 revs/min, rate of dispersion is 800 revs/min, mixing time 30 minutes.Then to set revolution speed be 25 revs/min and Chou vacuum carries out vacuumizing 30 minutes Dao≤-0.09MPa.Making slurry completes.
Testing size viscosity, solid content, granularity.Slurry viscosity is 1850mPa.s, and solid content is 52.45%, and granularity is 32 μm.Slurry leaves standstill 10h disposed slurry without layering, without sedimentation.
Embodiment 2: add 47 parts of Delaniums in planetary mixer, add the CMC of 0.9 part again, revolution speed is 25 revs/min, and rate of dispersion is 800 revs/min, mixing time 25 minutes.And then in planetary mixer, add the deionized water of 26 parts, and to set revolution speed be 30 revs/min, rate of dispersion is 900 revs/min, mixing time 60 minutes.And then in planetary mixer, add 7 parts of deionized waters, and to set revolution speed be 20 revs/min, rate of dispersion is 800 revs/min, mixing time 60 minutes.And then in planetary mixer, add the conductive carbon black of 0.5 part, and to set revolution speed be 20 revs/min, rate of dispersion is 800 revs/min, stirs 50 minutes.And then in planetary mixer, add 2.8 parts of SBR and 15.8 part deionized waters, and to set revolution speed be 30 revs/min, rate of dispersion is 1000 revs/min, mixing time 40 minutes.Then to set revolution speed be 20 revs/min and Chou vacuum carries out vacuumizing 20 minutes Dao≤-0.09MPa.Making slurry completes.
Testing size viscosity, solid content, granularity.Slurry viscosity is 1900mPa.s, and solid content is 50.13%, and granularity is 32 μm.Slurry leaves standstill 10h disposed slurry without layering, without sedimentation.
Embodiment 3: add 47 parts of Delaniums in planetary mixer, add the CMC of 1.0 parts again; Revolution speed is 23 revs/min, and rate of dispersion is 600 revs/min, stirs 28 minutes.And then in planetary mixer, add the deionized water of 28 parts, and to set revolution speed be 28 revs/min, rate of dispersion is 800 revs/min, stirs 55 minutes.And then in planetary mixer, add 9 parts of deionized waters, and to set revolution speed be 30 revs/min, rate of dispersion is 1200 revs/min, stirs 55 minutes, and whipping process controls slurry temperature at 25-45 DEG C.And then in planetary mixer, add the electrically conductive graphite of 0.5 part, and to set revolution speed be 30 revs/min, rate of dispersion is 1200 revs/min, stirs 55 minutes.And then in planetary mixer, add 2.0 parts of SBR and 12.5 part deionized waters, and to set revolution speed be 28 revs/min, rate of dispersion is 900 revs/min, stirs 35 minutes.Then to set revolution speed be 23 revs/min and Chou vacuum carries out vacuumizing 25 minutes Dao≤-0.09MPa.Making slurry completes.
Testing size viscosity, solid content, granularity.Slurry viscosity is 1950mPa.s, and solid content is 50.5%, and granularity is 33 μm.Slurry leaves standstill 10h disposed slurry without layering, without sedimentation.
Embodiment 4: add 53 parts of Delaniums in planetary mixer, add the CMC of 0.5 part again; Revolution speed is 25 revs/min, and rate of dispersion is 600 revs/min, stirs 28 minutes.And then in planetary mixer, add the deionized water of 29 parts, and to set revolution speed be 28 revs/min, rate of dispersion is 800 revs/min, stirs 55 minutes.And then in planetary mixer, add 7 parts of deionized waters, and to set revolution speed be 30 revs/min, rate of dispersion is 1200 revs/min, stirs 55 minutes, and whipping process controls slurry temperature at 25-45 DEG C.And then in planetary mixer, add the super-p of 0.5 part, and to set revolution speed be 30 revs/min, rate of dispersion is 1200 revs/min, stirs 55 minutes.And then in planetary mixer, add 2.5 parts of SBR and 9 part deionized waters, and to set revolution speed be 26 revs/min, rate of dispersion is 850 revs/min, stirs 38 minutes.Then to set revolution speed be 22 revs/min and Chou vacuum carries out vacuumizing 28 minutes Dao≤-0.09MPa.Making slurry completes.
Testing size viscosity, solid content, granularity.Slurry viscosity is 2250mPa.s, and solid content is 54.8%, and granularity is 33 μm.Slurry leaves standstill 10h disposed slurry without layering, without sedimentation.
Embodiment 5: add 50 parts of Delaniums in planetary mixer, add the CMC of 0.6 part again; Revolution speed is 25 revs/min, and rate of dispersion is 800 revs/min, stirs 28 minutes.And then in planetary mixer, add the deionized water of 30 parts, and to set revolution speed be 28 revs/min, rate of dispersion is 800 revs/min, stirs 55 minutes, and whipping process controls slurry temperature at 25-45 DEG C.And then in planetary mixer, add 6.5 parts of deionized waters, and to set revolution speed be 30 revs/min, rate of dispersion is 1200 revs/min, stirs 55 minutes.And then in planetary mixer, add the super-p of 0.7 part, and to set revolution speed be 30 revs/min, rate of dispersion is 1200 revs/min, stirs 55 minutes.And then in planetary mixer, add 3.0 parts of SBR and 13.5 part deionized waters, and to set revolution speed be 26 revs/min, rate of dispersion is 900 revs/min, stirs 35 minutes.Then to set revolution speed be 23 revs/min and Chou vacuum carries out vacuumizing 25 minutes Dao≤-0.09MPa.Making slurry completes.
Testing size viscosity, solid content, granularity.Slurry viscosity is 1750mPa.s, and solid content is 53.8%, and granularity is 33 μm.Slurry leaves standstill 10h disposed slurry without layering, without sedimentation.
Embodiment 6: add 53 parts of Delaniums in planetary mixer, add the CMC of 1.0 parts again; Revolution speed is 23 revs/min, and rate of dispersion is 600 revs/min, stirs 28 minutes.And then in planetary mixer, add the deionized water of 30 parts, and to set revolution speed be 28 revs/min, rate of dispersion is 800 revs/min, stirs 55 minutes, and whipping process controls slurry temperature at 25-45 DEG C.And then in planetary mixer, add 7 parts of deionized waters, and to set revolution speed be 30 revs/min, rate of dispersion is 1200 revs/min, stirs 55 minutes.And then in planetary mixer, add the conductive black of 0.5 part, and to set revolution speed be 30 revs/min, rate of dispersion is 1200 revs/min, stirs 55 minutes.And then in planetary mixer, add 2.0 parts of SBR and 8.5 part deionized waters, and to set revolution speed be 23 revs/min, rate of dispersion is 900 revs/min, stirs 35 minutes.Then to set revolution speed be 23 revs/min and Chou vacuum carries out vacuumizing 25 minutes Dao≤-0.09MPa.Making slurry completes.
Testing size viscosity, solid content, granularity.Slurry viscosity is 2150mPa.s, and solid content is 55.2%, and granularity is 33 μm.Slurry leaves standstill 10h disposed slurry without layering, without sedimentation.
Claims (4)
1. a lithium ion battery cathode slurry preparation method, is characterized in that: it comprises the following steps:
By weight calculating: active material is Delanium, accounts for 47-53 part; Thickener is sodium cellulose glycolate CMC, accounts for 0.5-1.0 part; Conductive agent is conductive carbon black or electrically conductive graphite or conductive agent super-p, accounts for 0.5-0.7 part; Binding agent is styrene butadiene rubber sbr, accounts for 2.0-3.0 part; Solvent is deionized water, accounts for 45-50 part.
2.
the thickener of the active material of described amount, described amount is added in planetary mixer, revolution speed 20-25 rev/min, under the condition of rate of dispersion 500-800 rev/min, stir 25-30 minute add powder;
add the described solvent accounting for and add powder proportion 55%-60% again, revolution speed 20-30 rev/min, under the condition of rate of dispersion 800-1200 rev/min, stir 50-60 minute;
add the described solvent accounting for and add powder proportion 13%-18% again, revolution speed 20-30 rev/min, under the condition of rate of dispersion 800-1200 rev/min, stir 50-60 minute;
add the conductive agent of described amount again, revolution speed 20-30 rev/min, under the condition of rate of dispersion 800-1200 rev/min, stir 50-60 minute;
add the binding agent of described amount and remaining described solvent again, revolution speed 25-30 rev/min, under the condition of rate of dispersion 800-1000 rev/min, stir 30-40 minute;
continue to stir, under the condition of revolution speed 20-25 rev/min, carry out vacuumizing stirring, stir 20-30 minute, make slurry.
3. lithium ion battery cathode slurry preparation method according to claim 1, is characterized in that: whipping process slurry temperature controls at 25-45 DEG C.
4. lithium ion battery cathode slurry preparation method according to claim 1 and 2, is characterized in that: in step
in Zhen Kong Du≤-0.09MPa when vacuumizing stirring.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450290A (en) * | 2016-11-15 | 2017-02-22 | 保定风帆新能源有限公司 | Admixture slurry for wide-temperature range lithium-ion battery capable of being charged and discharged at low temperature and preparation method |
| CN106611844A (en) * | 2016-12-27 | 2017-05-03 | 天臣新能源研究南京有限公司 | Lithium ion battery anode slurry compounding technology with high efficiency |
| 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 |
| CN107403914A (en) * | 2017-07-03 | 2017-11-28 | 江西安驰新能源科技有限公司 | A kind of dry mixing process of artificial plumbago negative pole slurry |
| CN107732142A (en) * | 2017-10-10 | 2018-02-23 | 中航锂电（江苏）有限公司 | A kind of lithium ion battery cathode slurry process for dispersing |
| CN107749460A (en) * | 2017-10-25 | 2018-03-02 | 东莞市久森新能源有限公司 | A kind of method for preparing lithium ion battery cathode slurry |
| CN108169057A (en) * | 2017-12-07 | 2018-06-15 | 惠州拓邦电气技术有限公司 | Pulp of lithium ion battery stability test method and device |
| 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 |
| CN108987715A (en) * | 2018-07-23 | 2018-12-11 | 芜湖彰鸿工程技术有限公司 | A kind of lithium ion battery anode slurry and preparation method thereof |
| CN109616610A (en) * | 2018-10-15 | 2019-04-12 | 福建冠城瑞闽新能源科技有限公司 | A kind of lithium ion water-base cathode blank preparation technics without glue |
| CN110071288A (en) * | 2019-04-03 | 2019-07-30 | 深圳鸿鹏新能源科技有限公司 | Negative electrode slurry and its preparation method and application |
| CN110518241A (en) * | 2019-08-30 | 2019-11-29 | 江西安驰新能源科技有限公司 | A kind of high efficiency dispersion technique of graphite cathode material |
| CN110600674A (en) * | 2019-08-31 | 2019-12-20 | 风帆有限责任公司 | Slurry mixing process of lithium ion battery slurry |
| CN113488606A (en) * | 2021-05-08 | 2021-10-08 | 上海兰钧新能源科技有限公司 | Preparation method of lithium battery electrode slurry |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450290B (en) * | 2016-11-15 | 2019-06-18 | 风帆有限责任公司 | One kind can the wide temperature range lithium ion battery conjunction slurry of low temperature charge and discharge and preparation method |
| CN106450290A (en) * | 2016-11-15 | 2017-02-22 | 保定风帆新能源有限公司 | Admixture slurry for wide-temperature range lithium-ion battery capable of being charged and discharged at low temperature and preparation method |
| 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 |
| CN106848205B (en) * | 2016-12-25 | 2019-08-09 | 中盐安徽红四方锂电有限公司 | A kind of lithium ion power cell cathode preparation method |
| CN106611844A (en) * | 2016-12-27 | 2017-05-03 | 天臣新能源研究南京有限公司 | Lithium ion battery anode slurry compounding technology with high efficiency |
| CN107403914A (en) * | 2017-07-03 | 2017-11-28 | 江西安驰新能源科技有限公司 | A kind of dry mixing process of artificial plumbago negative pole slurry |
| CN107732142A (en) * | 2017-10-10 | 2018-02-23 | 中航锂电（江苏）有限公司 | A kind of lithium ion battery cathode slurry process for dispersing |
| CN107749460A (en) * | 2017-10-25 | 2018-03-02 | 东莞市久森新能源有限公司 | A kind of method for preparing lithium ion battery cathode slurry |
| CN108169057A (en) * | 2017-12-07 | 2018-06-15 | 惠州拓邦电气技术有限公司 | Pulp of lithium ion battery stability test method and device |
| CN108169057B (en) * | 2017-12-07 | 2020-05-22 | 惠州拓邦电气技术有限公司 | Lithium ion battery slurry stability testing method and device |
| 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 |
| CN108987715A (en) * | 2018-07-23 | 2018-12-11 | 芜湖彰鸿工程技术有限公司 | A kind of lithium ion battery anode slurry and preparation method thereof |
| CN109616610A (en) * | 2018-10-15 | 2019-04-12 | 福建冠城瑞闽新能源科技有限公司 | A kind of lithium ion water-base cathode blank preparation technics without glue |
| CN110071288A (en) * | 2019-04-03 | 2019-07-30 | 深圳鸿鹏新能源科技有限公司 | Negative electrode slurry and its preparation method and application |
| CN110518241A (en) * | 2019-08-30 | 2019-11-29 | 江西安驰新能源科技有限公司 | A kind of high efficiency dispersion technique of graphite cathode material |
| CN110518241B (en) * | 2019-08-30 | 2022-02-18 | 江西安驰新能源科技有限公司 | Efficient dispersion process of graphite negative electrode material |
| CN110600674A (en) * | 2019-08-31 | 2019-12-20 | 风帆有限责任公司 | Slurry mixing process of lithium ion battery slurry |
| CN113488606A (en) * | 2021-05-08 | 2021-10-08 | 上海兰钧新能源科技有限公司 | Preparation method of lithium battery electrode slurry |
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