CN109768267A - One kind being based on dry mixed cell size preparation method - Google Patents
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- CN109768267A CN109768267A CN201910191458.2A CN201910191458A CN109768267A CN 109768267 A CN109768267 A CN 109768267A CN 201910191458 A CN201910191458 A CN 201910191458A CN 109768267 A CN109768267 A CN 109768267A
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The present invention provides one kind to be based on dry mixed cell size preparation method comprising: active material and binder are put into agitator tank, are stirred 0.2-0.4 hours；The methyl pyrrolidone that first time is added in agitator tank, is stirred 0.4-0.6 hours, and temperature control is 18-23 DEG C；Continue to add CNT conduction liquid in agitator tank, then proceed to stirring 0.4-0.6 hours, temperature control is 18-23 DEG C；Continue to add secondary methyl pyrrolidone in agitator tank, then continue stirring 2-2.5 hours under vacuum conditions, temperature control is 18-23 DEG C, obtains slurry；Wherein, the specific gravity of secondary methyl pyrrolidone and the methyl pyrrolidone of first time is 5: 5-3: 7.The present invention can promote anode sizing agent sedimentation stability, rheological behavior and dispersing uniformity in mixing procedure compared to the prior art.
Description
Technical field
The present invention relates to field of lithium ion battery, are prepared in particular to one kind based on dry mixed cell size
Method.
Background technique
The manufacture of lithium ion battery is a complicated system engineering, battery performance quality by raw material, battery design,
The many factors such as manufacturing equipment and technique, environment influence, and any point defect all may cause the avalanche of battery product.Therefore,
Although emerging in multitude now concerning the new material of lithium battery, new design and new process, their industrialization process is very slow, lithium
Battery does not occur huge technological innovation.Material is the basis of lithium battery, and manufacturing process is also critically important.Wherein, mixing
Technique in the entire production technology of lithium ion battery to the qualitative effects degree of product be greater than 30%, be in entire production technology most
Important link.Lithium ion battery electrode manufacture in, anode and cathode slurry be essentially all by active material, polymeric binder,
The composition such as conductive agent.
The preparation of electrode slurry is a ring of most critical in entire process, and can electrode slurry quality directly affects
It carries out in next step.Slurry preparation is the non newtonian for forming the powder liquid such as active material, bonding agent, solvent, thickener after mixing
High viscosity fluid, the fluid need to have certain viscosity, good mobility and sufficiently small grain diameter.
The mixing procedure of electrode slurry is probably divided into three kinds: (1) ball-milling technology is originally derived from coating industry；(2) wet process
Mixing procedure, basic process are colloidal sol-hybrid conductive agent-mixing active material-dilution, this is current domestic prevailing technology；(3)
Dry mixing technique, basic process are that active material, conductive agent and the appropriate wet with solvent-addition of adhesive dry powder blend-addition are molten
Agent high speed dispersion is crushed-dilution adjusting viscosity.
As the ternary battery material of most mainstream at present, ternary material is considered as following development trend, with new energy
The requirement of the continuous development of source automobile market, cruising ability and specific energy for battery is continuously improved.
However, it is heavy that generally there is also anode sizing agents when current mixing procedure is directed to ternary material isoreactivity substance
Stability, rheological behavior and the unstable problem of dispersing uniformity drop.
Summary of the invention
In consideration of it, the present invention provides one kind to be based on dry mixed cell size preparation method, it is intended to solve existing
Anode sizing agent sedimentation stability, rheological behavior present in mixing procedure and the unstable problem of dispersing uniformity.
The present invention provides one kind to be based on dry mixed cell size preparation method comprising following preparation step:
Stirring operation for the first time: active material and binder are put into agitator tank, is then stirred, mixing time is
0.2-0.4 hours；
Second of stirring operation: continue to add the methyl pyrrolidone of first time in agitator tank, then proceed by and stir
It mixes, mixing time is 0.4-0.6 hours, and temperature control is 18-23 DEG C, obtains the colloid of half-dried pureed state；
Third time stirring operation: continue to add CNT conduction liquid in agitator tank, then proceed by stirring, mixing time
It is 0.4-0.6 hours, temperature control is 18-23 DEG C；
4th stirring operation: continue to add secondary methyl pyrrolidone in agitator tank, then in vacuum environment
Under continue to stir, mixing time be 2-2.5 hour, temperature control be 18-23 DEG C, obtain slurry；Wherein, secondary first
The specific gravity of base pyrrolidones and the methyl pyrrolidone of first time is 5: 5-3: 7.
Further, in above-mentioned first time stirring operation, the revolving speed of agitator tank is revolution rpm20-40, rotation rpm700-
900, ambient pressure < 60KPa.
Further, in above-mentioned second of stirring operation, the revolving speed of agitator tank is revolution rpm20-40, rotation rpm700-
900, ambient pressure < 60KPa.
Further, in above-mentioned third time stirring operation, the revolving speed of agitator tank is revolution rpm30-50, turns rpm900-
1100, vacuum degree is -70KPa to -90KPa.
Further, in above-mentioned 4th stirring operation, the revolving speed of agitator tank is revolution rpm30-50, turns rpm1400-
1600, vacuum degree is -70KPa to -90KPa.
Further, above-mentioned slurry is cooling by condensate water circulatory, and cooling temperature is 18-23 DEG C.
Further, above-mentioned active material is ternary material, and binder is Kynoar powder.
Further, the weight ratio of above-mentioned ternary material, CNT conduction liquid and Kynoar powder are as follows:
Ternary material 97-98.5%；
CNT conduction liquid 1-2%；
Kynoar powder 0.5-1%.
Further, the weight ratio of above-mentioned ternary material, CNT conduction liquid and Kynoar powder are as follows: ternary material
97.8%；CNT conduction liquid 1.3%；Kynoar powder 0.9%.
Further, above-mentioned ternary material is nickle cobalt lithium manganate, ratio Ni: Co: Mn=0.8: 0.1: 0.1.
It is provided by the present invention it is a kind of based on dry mixed cell size preparation method compared to the prior art mainly with
Lower advantage: by above-mentioned specific preparation method, anode sizing agent sedimentation stability in mixing procedure, rheological behavior can be promoted
And dispersing uniformity.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Figure 1A is the processing procedure figure of the first preparation method in the prior art as a comparison；
Figure 1B is the processing procedure figure of second of preparation method in the prior art as a comparison；
Fig. 1 C is the processing procedure figure of the third preparation method in the prior art as a comparison；
Fig. 1 D is a kind of processing procedure figure based on dry mixed cell size preparation method provided in an embodiment of the present invention；
Fig. 2 is the comparison diagram of time and obtained viscosity needed for four kinds of preparation method stirrings；
Fig. 3 is the discharge curve comparison diagram of four kinds of preparation methods；
Fig. 4 is provided in an embodiment of the present invention a kind of based on slurry obtained by dry mixed cell size preparation method
Particle microscopic appearance figure；
Fig. 5 is a kind of pole piece porosity based on dry mixed cell size preparation method provided in an embodiment of the present invention
Tendency chart；
Fig. 6 is that a kind of pole piece based on dry mixed cell size preparation method provided in an embodiment of the present invention combines by force
Spend tendency chart；
Fig. 7 A is a kind of discharge capacity based on dry mixed cell size preparation method provided in an embodiment of the present invention
Tendency chart one；
Fig. 7 B is a kind of discharge capacity based on dry mixed cell size preparation method provided in an embodiment of the present invention
Tendency chart two.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
Instrument used in following embodiment and material include:
Planetary mixer, model DPS-200, manufacturer are Wuxi Zhi Tongyuanfeng Science and Technology Ltd.；
Nickle cobalt lithium manganate 811, model P48A-S, manufacturer are the Dongyang Ru Yuan photomagnetism Science and Technology Ltd.；
CNT conductive agent, model DH-P3-5, manufacturer are Wuxi Dong Heng New Energy Technology Co., Ltd.；PVDF, board
Number be 5130, manufacturer be U.S. Su Wei company；
Methyl pyrrolidone, the trade mark 5130, manufacturer are Guangdong Yue Mei Chemical Co., Ltd..
Preparation process are as follows:
It by 10000g811 nickle cobalt lithium manganate, 92.02gPVDF, is stirred after mixing, stirs 0.3h；
By the methyl pyrrolidone of addition 60% in obtained dry powder rerolling, it is conductive that 2658.48gCNT is then added
Agent, carries out triple mixing in a vacuum, time 0.5h, adds methyl pyrrolidone in last four stirrings, is necessary requirement
The residue 60% of amount, mixing time 2h, after obtain forerunner's complex.
First and second speed of agitator is revolution rpm30, rotation rpm800, temperature T < 25, air pressure < 60KPa, temperature control
System, 18-23 DEG C；Third time speed of agitator mixes revolving speed as revolution rpm40, rotation rpm1000, temperature T < 25, vacuum degree-
80KPa, temperature control, 18-23 DEG C；: third time speed of agitator mixes revolving speed as revolution rpm40, rotation rpm1500, temperature T <
25, vacuum degree -80KPa, temperature control are 18-23 DEG C.
By 811 obtained nickel-cobalt lithium manganate materials in ternary slurry, different material is used with other three kinds of prevailing technologies
Material and formula, and change the property that feeding sequence changes slurry.The mixability of slurry depends on granular size, granularity point
Cloth, shape, specific surface area, solvent absorption rate of particle etc., to the time needed for viscosity stabilization and sequentially adding since stirring
Material specific surface area it is most related.
Referring to Figure 1A -1D:
Method 1: active material absorption liquid is insufficient, and the specific surface area of conductive agent is more much larger than active material particle, and surface is inhaled
A large amount of liquid is received, liquid is fallen into conductive agent, cannot be flowed easily.
Method 2: active material specific surface area is small, it is easier to discharge liquid.It is added after conductive agent, starts lyosoption, viscosity
It is longer to stablize the time.
Method 3: active material large specific surface area, it is not easy to discharge liquid.It being added after conductive agent, liquid is fallen into conductive agent,
The viscosity stabilization time is not grown.
Method 4: active material and conductive agent absorb liquid simultaneously, soak solid particle, and such method lyosoption is most abundant,
Preferably, therefore, slurry viscosity is minimum under the conditions of identical solid content for slurry dispersibility.
As a result, it has been found that it is acceptable to reach stable time using the slurry viscosity of the 4th kind of technique, and prepared slurry
Viscosity is minimum, and dispersibility is best, and half-cell loop test is the result shows that the battery of this technique preparation follows discharge capacity decaying
It is minimum.
Referring to fig. 2 to Fig. 3, the made half-cell loop test of four kinds of mixing procedures, using active material, conductive agent, solvent,
Binder and institute's control equipment are identical, and for novel anode dry mixing technique compared with conventional wet (dry method) technique, the technique is raw
The negative electrode slurry of production has better performance, and slurry viscosity, granularity and solid content stability etc. are obtained than fluid dispersion technique
To slurry to get well, manufactured membrane resistance rate is lower, and bonding force is higher, and manufactured battery core capacity retention ratio is higher.Superelevation is viscous
When degree stirring, shearing force is capable of greatly the conductive agent of the more fully dispersed tiny easy reunion of particle, while being more favorable to bond
Agent is dissolved and is stablized, so that battery performance is more excellent.
Referring to fig. 4, novel anode dry mixing technical scissors cutting of the invention dissipates the effect having there are two aspect a: side
Face, high shearing force can make the sufficiently broken dispersion of conductive agent aggregate, on the other hand, under high speed dispersion effect, dry powder stirring
It can be realized the mixing on microcosmic, deposit to form one layer by tiny scattered conductive agent in biggish active material particle surface
Sedimentary, to form good conductive network.If general dry powder blend intensity is low, conductive agent is not completely dispersed,
Active material particle surface, which still exists, reunites, and high-strength dry powder hybrid technique makes the sufficiently broken dispersion of conductive agent aggregate,
Active material surface forms sedimentary.
Referring to Fig. 5, the intensity of novel anode dry mixing technique dispersion of the invention can use froude number or rotor linear speed
Degree indicates that upper figure is influence of the novel anode dry mixing technique to coating pole piece porosity, and non-roll-in after pole coating is high
Intensity dry powder blend can reduce the porosity of pole piece, and one timing of revolving speed, as jitter time is longer, porosity is lower, and divides
One timing of time is dissipated, revolving speed more high porosity is lower.
Referring to Fig. 6, the influence of novel anode dry mixing technique of the invention to coating pole piece bond strength, pole coating
Non- roll-in later, high-strength dry powder, which mixes, can be improved the bond strength of pole piece, one timing of revolving speed, as jitter time is longer,
Bond strength is higher, and one timing of jitter time, revolving speed more high bond strength are higher.
Referring to Fig. 7 A-7B, novel anode dry mixing technique of the invention necessarily can be improved the performance of battery.Pole piece
Roll-in is to identical coating compacted density after coating, and then same cathode pole piece is assembled into full battery, tests battery performance.
Compared with the battery for not using this technique, the multiplying power property and and circulation of battery is can be improved in high novel anode dry mixing technique
Performance.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. one kind is based on dry mixed cell size preparation method, which is characterized in that including following preparation step:
Stirring operation for the first time: active material and binder are put into agitator tank, is then stirred, mixing time 0.2-
0.4 hour；
Second of stirring operation: continue to add the methyl pyrrolidone of first time in agitator tank, then proceed by stirring, stir
Mixing the time is 0.4-0.6 hours, and temperature control is 18-23 DEG C, obtains the colloid of half-dried pureed state；
Third time stirring operation: continue to add CNT conduction liquid in agitator tank, then proceed by stirring, mixing time is
0.4-0.6 hours, temperature control was 18-23 DEG C；
4th stirring operation: continuing to add secondary methyl pyrrolidone in agitator tank, then under vacuum conditions after
Continuous to be stirred, mixing time is 2-2.5 hours, and temperature control is 18-23 DEG C, obtains slurry；Wherein, secondary methyl pyrrole
The specific gravity of pyrrolidone and the methyl pyrrolidone of first time is 5: 5-3: 7.
2. a kind of dry mixed cell size preparation method is based on according to claim 1, which is characterized in that described the
In primary stirring operation, the revolving speed of agitator tank is revolution rpm20-40, rotation rpm700-900, ambient pressure < 60KPa.
3. a kind of dry mixed cell size preparation method is based on according to claim 1, which is characterized in that described the
In secondary agitation operation, the revolving speed of agitator tank is revolution rpm20-40, rotation rpm700-900, ambient pressure < 60KPa.
4. a kind of dry mixed cell size preparation method is based on according to claim 1, which is characterized in that described the
In triple mixing operation, the revolving speed of agitator tank is revolution rpm30-50, turns rpm900-1100, vacuum degree be -70KPa to -
90KPa。
5. a kind of dry mixed cell size preparation method is based on according to claim 1, which is characterized in that described the
In four stirring operations, the revolving speed of agitator tank is revolution rpm30-50, turns rpm1400-1600, vacuum degree be -70KPa to -
90KPa。
6. according to claim 1 a kind of based on dry mixed cell size preparation method, which is characterized in that the slurry
Material is cooling by condensate water circulatory, and cooling temperature is 18-23 DEG C.
7. according to claim 1 a kind of based on dry mixed cell size preparation method, which is characterized in that the work
Property substance be ternary material, the binder be Kynoar powder.
8. according to claim 1 a kind of based on dry mixed cell size preparation method, which is characterized in that described three
The weight ratio of first material, the CNT conduction liquid and the Kynoar powder are as follows:
Ternary material 97-98.5%；
CNT conduction liquid 1-2%；
Kynoar powder 0.5-1%.
9. according to claim 1 a kind of based on dry mixed cell size preparation method, which is characterized in that described three
The weight ratio of first material, the CNT conduction liquid and the Kynoar powder are as follows: ternary material 97.8%；CNT conduction liquid
1.3%；Kynoar powder 0.9%.
10. one kind according to claim 8 or claim 9 is based on dry mixed cell size preparation method, which is characterized in that institute
Stating ternary material is nickle cobalt lithium manganate, ratio Ni: Co: Mn=0.8: 0.1: 0.1.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110600741A (en) * | 2019-08-29 | 2019-12-20 | 厦门劦能科技有限公司 | Production process of lithium battery anode composite conductive slurry |
| CN113466560A (en) * | 2021-06-30 | 2021-10-01 | 广船国际有限公司 | Electrostatic spraying coating conductivity on-line monitoring device |
| CN113921767A (en) * | 2021-09-29 | 2022-01-11 | 蜂巢能源科技有限公司 | Positive pole piece for solid-state battery and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102569733A (en) * | 2010-12-21 | 2012-07-11 | 比克国际(天津)有限公司 | Preparation method for lithium ion battery slurry, as well as battery slurry and lithium ion battery |
| CN106299280A (en) * | 2016-08-31 | 2017-01-04 | 中航锂电（洛阳）有限公司 | A kind of preparation method of high capacity lithium ion battery anode sizing agent |
| US20170331112A1 (en) * | 2014-11-26 | 2017-11-16 | Showa Denko K.K. | Method for manufacturing electroconductive paste, and electroconductive paste |
-
2019
- 2019-03-15 CN CN201910191458.2A patent/CN109768267A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102569733A (en) * | 2010-12-21 | 2012-07-11 | 比克国际(天津)有限公司 | Preparation method for lithium ion battery slurry, as well as battery slurry and lithium ion battery |
| US20170331112A1 (en) * | 2014-11-26 | 2017-11-16 | Showa Denko K.K. | Method for manufacturing electroconductive paste, and electroconductive paste |
| CN106299280A (en) * | 2016-08-31 | 2017-01-04 | 中航锂电（洛阳）有限公司 | A kind of preparation method of high capacity lithium ion battery anode sizing agent |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110600741A (en) * | 2019-08-29 | 2019-12-20 | 厦门劦能科技有限公司 | Production process of lithium battery anode composite conductive slurry |
| CN110600741B (en) * | 2019-08-29 | 2020-10-30 | 厦门劦能科技有限公司 | Production process of lithium battery anode composite conductive slurry |
| CN113466560A (en) * | 2021-06-30 | 2021-10-01 | 广船国际有限公司 | Electrostatic spraying coating conductivity on-line monitoring device |
| CN113466560B (en) * | 2021-06-30 | 2024-02-20 | 广船国际有限公司 | Electrostatic spraying coating conductivity on-line monitoring device |
| CN113921767A (en) * | 2021-09-29 | 2022-01-11 | 蜂巢能源科技有限公司 | Positive pole piece for solid-state battery and preparation method and application thereof |
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Application publication date: 20190517 |