CN106450465A - Preparation method of slurry of lithium-ion battery - Google Patents
Preparation method of slurry of lithium-ion battery Download PDFInfo
- Publication number
- CN106450465A CN106450465A CN201610658658.0A CN201610658658A CN106450465A CN 106450465 A CN106450465 A CN 106450465A CN 201610658658 A CN201610658658 A CN 201610658658A CN 106450465 A CN106450465 A CN 106450465A
- Authority
- CN
- China
- Prior art keywords
- dispersion
- slurry
- preparation
- tank
- jet
- 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
-
- 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
- H01M10/058—Construction or manufacture
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides a preparation method of slurry of a lithium-ion battery. The method comprises the steps as follows: early mixed slurry is prepared by using a mechanical stirring method; two or more streams of jet flow are formed by the early mixed slurry by using a high-pressure pump and enter a dispersing tank through a jet nozzle; the jet flow is continuously collided and dispersed in the dispersing tank; the diameter of the jet flow is 2-50mm; and the linear velocity of the jet flow is 5-100m/s. Multiple streams of high-pressure jet flow are formed by the early mixed slurry by using the high-pressure pump and continuously enter the dispersing tank for dispersing in cycle, so that the slurry preparation time is shortened, the dispersing effect and the uniformity of the slurry are improved; the number of impurity particles mixed into the slurry due to abrasion of a dispersing device is reduced and the damage to the material is reduced; and the preparation method is especially suitable for dispersion of the material which is sensitive in structure and performance.
Description
Technical field
The invention belongs to polymer Li-ion battery technical field, more particularly, to a kind of preparation side of pulp of lithium ion battery
Method.
Background technology
Lithium ion battery due to having that specific energy is high, have extended cycle life and the features such as environmental friendliness, be widely used to
In the consumer electronics products such as mobile phone, notebook computer, digital camera, and it is increasingly being applied to electric motor car and energy storage
Field.The preparation of anode and cathode slurry is one of lithium ion battery production process important step, therefore the scattered degree of slurry
And uniformity has a major impact to the performance of lithium ion battery.
Mostly traditional slurry dispersion technology is using churned mechanically mode, in double planetary mixer or standard machinery stirring
Carry out the dispersed with stirring of slurry, mixing time is long, and the uniformity of slurry also has much room for improvement in machine.Dispersion in order to improve stirring is imitated
Really, the slurry that mechanical agitation was disperseed is done by part lithium ion battery manufacturing enterprise using sand mill or high shear dispersion machine again
Further dispersion, sand mill passes through mechanical lapping and realizes dispersion, the blade by high-speed rotation for the high shear dispersion machine to slurry
Dispersion is realized to slurry, although the dispersion effect of both process for dispersing makes moderate progress compared with mechanical agitation, can be in slurry
Material structure damaged, such as can interrupt some binding agents macromolecular chain cause Binder Properties decline, or destroy
The surface coating layer that some have the material of full-package structure causes material property to decline；Moreover, the grinding of sand mill
The blade of position and high shear dispersion machine, it also occur that abrasion, produces some tiny impurity particles, especially metal particle
It is mixed among slurry, these fine particles can lead to battery performance to deteriorate, be mainly shown as that self-discharge of battery phenomenon is serious, and meeting
Increase the risk of internal short-circuit of battery.In order to remove the impurity particle in slurry, some producers remove slurry using tramp iron separator
In magnetic particle, to alleviate the problem that particle is mixed into slurry, but pulp of lithium ion battery viscosity is generally very high, and magnetic field can only
Remove partly larger magnetic-particle, not good to the removal effect of less magnetic-particle or not magnetic particle.Therefore,
From source, problem above is improved, needing starts with from slurry dispersion technology improves.
Content of the invention
It is an object of the invention to provide a kind of lithium ion battery that can improve slurry scattering effect and slurry uniformity
The preparation method of slurry.
To achieve these goals, the present invention takes following technical solution：
The preparation method of pulp of lithium ion battery, comprises the following steps：
Preparation just slurry material；
The jet that just slurry material forms 2 strands or more than 2 strands is made to inject in dispersion tank through nozzle using high-pressure pump, jet is dividing
Constant collision dispersion in scattered tank；
A diameter of 2～50mm of described jet, the linear velocity of jet is 5～100m/s.
Further, a diameter of 4～20mm of described jet, the linear velocity of jet is 10～50m/s.
Further, jet carry out after injecting dispersion tank scattered during keep vacuum state in dispersion tank until slurry
Dispersion completes, and is then filled with inert gas into dispersion tank, makes nitrogen be full of dispersion tank and sheds vacuum.
Further, described nozzle is arranged in the upper portion side wall of dispersion tank, and nozzle entrance port is located at slurry in dispersion tank
On liquid level.
Further, described nozzle is located at the same level height of dispersion tank, the circumferentially uniform intervals setting of described nozzle
On dispersion pot sidewall.
Further, the point of impingement of jet is located on the center line of dispersion tank.
Further, in slurry dispersion process, slurry in dispersion tank is cooled down.
Further, the tank skin of described dispersion tank has a hollow layer, hollow intrastratal flow coolant.
Further, just slurry material is prepared using churned mechanically mode.
Further, using double planetary mixer or machine mixer preparation just slurry material.
From above technical scheme, the present invention is tentatively stirred to slurry first, is then made just mixed using high-pressure pump
Slurry forms multiply high-pressure spray circulation continuous and injects in dispersion tank, collision dispersion in dispersion tank, can shorten slurry preparation
Time, realize slurry being sufficiently mixed on a microscopic scale in the short period of time；Improve slurry scattering effect and slurry is uniform
Property, thus keeping the uniformity of battery pole piece and improving the uniformity of cell performance；And can reduce because of dispersal device
Wear and tear and be mixed into the impurity particle quantity of slurry and the infringement reducing to material, thus reducing self-discharge of battery degree and reduction
The risk of internal short-circuit of battery, the dispersion of especially suitable structure and performance-sensitive material.
Brief description
Fig. 1 is the schematic diagram of embodiment of the present invention spray dispersion；
Fig. 2 is the structural representation of dispersion tank；
Fig. 3 is the top view of Fig. 2；
Fig. 4 to Fig. 9 is respectively the pole piece SEM figure of embodiment 1-3 and comparative example 1-3.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in more detail.
Specific embodiment
Describe the present invention below in conjunction with the accompanying drawings, when describing the embodiment of the present invention in detail, for purposes of illustration only, representing
The accompanying drawing of device architecture can be disobeyed general ratio and be done partial enlargement, and described schematic diagram is example, and its here should not limit
The scope of protection of the invention.It should be noted that accompanying drawing is in the form of simplifying and all using non-accurately ratio, only in order to side
Just, clearly aid in illustrating the purpose of the embodiment of the present invention.
The basic ideas of the inventive method are：Slurry material at the beginning of preparing, slurry material shape in dispersion tank at the beginning of being allowed using high-pressure pump
Become multiple jetses, jet clashes at dispersion tank centre head-on collision point, so that just slurry material is completely dispersed.
The first slurry material of the present invention is prepared using churned mechanically mode, for example with double-planet stirring and or standard machinery stir
Machine of mixing carries out pre- stirring to lithium ion battery positive and negative electrode slurry, makes just slurry material, after first slurry material is obtained, using high-pressure pump
Make just slurry material form persistent loop high-pressure spray and inject in dispersion tank to be disperseed.Fig. 1 is the schematic diagram of spray dispersion, Fig. 2
With Fig. 3 for dispersion tank structural representation.As shown in figure 1, just slurry material forms 2 strands or more than 2 strands of jet by high-pressure pump 1
Inject in dispersion tank 2, jet collides dispersion in dispersion tank, the jet point of impingement is located on the center line a of dispersion tank, and high-pressure pump makes
Jet persistent loop is injected, and carries out collision dispersion.
Dispersion tank is the tank body of closing, as shown in Figures 2 and 3, the dispersion tank 2 of the present embodiment is provided with vacuum orifice 2-
1 and inert gas be filled with a mouthful 2-2, vacuum orifice 2-1 is connected with vavuum pump, in dispersion tank 2 formed vacuum environment, protection
Material to air-sensitive, reduces speed loss in gas for the jet simultaneously, improves mixing efficiency.The vacuumizing of the present embodiment
Mouth 2-1 and inert gas are filled with mouthful 2-2 and may be contained within the top cover 2a of dispersion tank 2.Need to shed dispersion after slurry has disperseed
Vacuum in tank, is filled with mouthful 2-2 by inert gas and is filled with inert gas into dispersion tank 2 and shed vacuum, can be passed through nitrogen, argon
The inert gases such as gas, protect the material to air-sensitive further.
The jet that high-pressure pump is formed sprays from the round nozzle 2b being arranged at dispersion tank 2 side wall, and jet is a diameter of 2
The near cylindrical high-velocity fluid of～50mm, the speed of per share jet is essentially identical, nozzle exit fluid linear velocity be 5～
100m/s, further, the diameter of jet is preferably 4～20mm, fluid linear velocity is 10～50m/s.
When the diameter of jet is too small, jet is difficult to be directed at the point of impingement, and the too little impact efficiency of jet flow；When penetrating
When the diameter of stream is excessive, the high speed of jet to be maintained is accomplished by the high-pressure pump using higher performance, and this will increase input
And maintenance cost, the therefore present invention, according to material properties, jet diameter elects as 2～50mm.When effluxvelocity is too low,
The energy that jet collides is insufficient to allow slurry uniform mixing and the dispersion of microcosmic point to occur, when jet velocity is too high
Wait, the energy that jet collides is too high to cause some infringements, therefore the effluxvelocity choosing of the present invention to the material in slurry
For 5～100m/s.When being embodied as, the classification of scattered slurry and property to determine as needed for jet diameter and speed needs
Optimal values.
Nozzle is arranged at the top of dispersion tank by the present invention, so that entrance port is located on slurry liquid face in tank, each nozzle is equal
Positioned at same level height, nozzle circumferentially uniform intervals setting, to ensure that jet collides in dispersion tank centre, such as
2 strands of jets are in 180 DEG C of incidences with mutual angle in the horizontal plane, and 3 strands of jets are 120 DEG C of incidences with mutual angle, penetrate for 4 strands
Stream is 90 DEG C of incidences with mutual angle, by that analogy.The quantity of high-pressure pump can be corresponding with jet quantity, in high-pressure pump performance
In the range of permission, it would however also be possible to employ high-pressure pump produces 2 strands or more than 2 strands of jet.Nozzle adopts high wear-resisting of hardness
Material is made, for example the material such as hard alloy, oxide ceramics, carbide ceramics, nitride ceramics, diamond, and detachably
Changing, to regularly replace after nozzle wear, facilitating the nozzle selecting different-diameter simultaneously.
As the preferred embodiments of the invention, dispersion tank has refrigerating function, can be to tank in slurry dispersion process
Interior slurry is cooled down.As shown in Fig. 2 the tank skin of dispersion tank has a hollow layer 2c, flowing in hollow layer 2c has coolant, cold
But liquid can be cooling water or condensate liquid, and hollow layer 2c passes through cooling liquid inlet 2-3 and cooling liquid outlet 2-4 and coolant cyclic system
System connection, coolant enters hollow layer 2c by cooling liquid inlet 2-3 and flows in hollow layer 2c, finally from cooling liquid outlet
2-4 flows out, and plays the effect of cooling.
Elaborate a lot of details in the following description in order to fully understand the present invention, but the present invention is acceptable
To be implemented different from alternate manner described here using other, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by following public specific embodiment.
With specific embodiment, the invention will be further described below：
Embodiment 1
Add 3 parts of aqueous binders LA133 and 50 parts of deionized waters in double planetary mixer, setting revolution speed is
20r/min, rotational velocity is 100r/min, vacuumizes stirring 5min；Add 3 parts of conductive agent carbon blacks, setting revolution speed is
40r/min, rotational velocity is 500r/min, vacuumizes stirring 10min；Add 50 parts of Delaniums, setting revolution speed in three times
Spend for 40r/min, rotational velocity is 500r/min, vacuumize stirring 30min, obtain just slurry material；
By first slurry material high-pressure pump formation linear velocity be 50m/s, 2 bursts of jet of stock of a diameter of 2mm inject dispersion tank
In, two strands of jets clash in dispersion tank, be vacuum state, continue spray dispersion 120min in dispersion process dispersion tank,
After dispersion terminates, it is filled with nitrogen into dispersion tank, makes nitrogen be full of dispersion tank and shed vacuum, prepared cathode size.
The slurry being obtained is sent coating machine to carry out pole coating, after coated pole piece is dried, uses ESEM (SEM)
Detection dispersity, then routinely technique makes lithium ion battery for collocation conventional cathode piece, barrier film and electrolyte.
Comparative example 1
Add 3 parts of aqueous binders LA133 and 50 parts of deionized waters in double planetary mixer, revolution speed is 20r/
Min, rotational velocity is 100r/min, vacuumizes stirring 30min；Add 3 parts of conductive agent carbon blacks, revolution speed is 40r/min, from
Rotary speed is 500r/min, vacuumizes stirring 60min；Add 50 parts of Delaniums in three times, revolution speed is 40r/min, from
Rotary speed is 1000r/min, vacuumizes stirring 240min, prepared cathode size.
The slurry being obtained is sent coating machine to carry out pole coating, with ESEM detection point after coated pole piece is dried
Bulk state, then routinely technique makes lithium ion battery for collocation conventional cathode piece, barrier film and electrolyte.
Embodiment 2
3 parts of binding agent Kynoar (PVDF) and 50 parts of 1-METHYLPYRROLIDONEs are added in standard machinery mixer
(NMP), rotating speed is set to 100r/min, vacuumizes stirring 60min；Add 3 parts of conductive agent CNTs, rotating speed is 200r/
Min, vacuumizes stirring 20min；Add 50 parts of cobalt acid lithiums in three times, rotating speed is 200r/min, vacuumize stirring 40min, obtain
Just slurry material；
By first slurry material high-pressure pump formation linear velocity be 5m/s, 4 bursts of jet of stock of a diameter of 50mm inject dispersion tank
In, 4 strands of jets clash in dispersion tank, be vacuum state, continue spray dispersion 120min in dispersion process dispersion tank, point
After dissipating bind bundle, it is filled with nitrogen into dispersion tank, sheds vacuum, prepared anode sizing agent.
The slurry being obtained is sent coating machine to carry out pole coating, with ESEM detection point after coated pole piece is dried
Bulk state, then routinely technique makes lithium ion battery for collocation conventional anode piece, barrier film and electrolyte.
Comparative example 2
Add 3 parts of binding agent PVDF and 50 parts of NMP in standard machinery mixer, rotating speed is 100r/min, vacuumizes and stirs
Mix 180min；Add 3 parts of conductive agent CNTs, rotating speed is 200r/min, vacuumize stirring 60min；Add 50 parts in three times
Cobalt acid lithium, rotating speed is 200r/min, vacuumizes stirring 240min, prepared anode sizing agent.
The slurry being obtained is sent coating machine to carry out pole coating, with ESEM detection point after coated pole piece is dried
Bulk state, then routinely technique makes lithium ion battery for collocation conventional anode piece, barrier film and electrolyte.
Embodiment 3
Add 3 parts of binding agent PVDF and 50 parts of NMP in double planetary mixer, revolution speed is 20r/min, rotational velocity
For 100r/min, vacuumize stirring 60min；Add 3 parts of conductive agent Graphenes, revolution speed is 40r/min, rotational velocity is
500r/min, vacuumizes stirring 10min；Add 50 parts of LiFePO4s in three times, revolution speed is 40r/min, rotational velocity is
500r/min, vacuumizes stirring 30min, obtains just slurry material；
By first slurry material high-pressure pump formation linear velocity be 25m/s, 3 bursts of jet of stock of a diameter of 5mm inject dispersion tank
In, jet clashes in dispersion tank, is vacuum state in dispersion process dispersion tank, continues spray dispersion 120min, dispersion
After end, it is filled with argon gas into dispersion tank, sheds vacuum, prepared anode sizing agent.
The slurry being obtained is sent coating machine to carry out pole coating, with ESEM detection point after coated pole piece is dried
Bulk state, then routinely technique makes lithium ion battery for collocation conventional anode piece, barrier film and electrolyte.
Comparative example 3
Add 3 parts of binding agent PVDF and 50 parts of NMP in double planetary mixer, revolution speed is 20r/min, rotational velocity
For 100r/min, vacuumize stirring 180min；Add 3 parts of conductive agent Graphenes, revolution speed is 40r/min, rotational velocity is
500r/min, vacuumizes stirring 60min；Add 50 parts of LiFePO4s in three times, revolution speed is 40r/min, rotational velocity is
1000r/min, vacuumizes stirring 240min, prepared anode sizing agent.
The slurry being obtained is sent coating machine to carry out pole coating, coated pole piece detects dispersion with ESEM after drying
State, then routinely technique makes lithium ion battery for collocation conventional anode piece, barrier film and electrolyte.
The battery of embodiment 1-3 and the preparation of comparative example 1-3 is carried out capacity and inner walkway, table 1 is embodiment 1-3, right
Time, dispersion effect, the internal resistance of cell and Capacity uniformity contrast list used by ratio 1-3 pulping process, Fig. 1 to Fig. 6 is respectively
The SEM figure of the pole piece that embodiment 1-3 and comparative example 1-3 are obtained.From the contrast of table 1 and Fig. 1 to Fig. 6, using the present invention's
Dispersion technology, compares standard machinery stirring technique (standard machinery mixer and double planetary mixer), can substantially shorten slurry
Preparation time, improve production efficiency, and improve slurry scattering effect and slurry uniformity, finally reduce the internal resistance of cell, improve electricity
Pond uniformity.
Table 1
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Slurrying total time (min) | 165 | 240 | 220 | 330 | 480 | 480 |
| Dispersion effect | Good | Good | Good | Difference | Difference | Difference |
| The internal resistance of cell (m Ω) | 54 | 48 | 58 | 61 | 59 | 67 |
| Capacity uniformity | High | High | High | Low | Low | Low |
Embodiment 4
Add 3 parts of binding agent PVDF and 50 parts of NMP in double planetary mixer, revolution speed is 20r/min, rotational velocity
For 100r/min, vacuumize stirring 20min；Add 3 parts of conductive agent carbon blacks, revolution speed is 40r/min, rotational velocity is
400r/min, vacuumizes stirring 10min；Add 50 parts of nickel-cobalt-manganese ternary materials in three times, revolution speed is 40r/min, rotation
Speed is 400r/min, vacuumizes stirring 30min, obtains just slurry material；
By first slurry material high-pressure pump formation linear velocity be 20m/s, 2 bursts of jet of stock of a diameter of 10mm inject dispersion tank
In, jet clashes in dispersion tank, is vacuum state in dispersion process dispersion tank, continues spray dispersion 120min, dispersion
After end, it is filled with nitrogen into dispersion tank, sheds vacuum, prepared anode sizing agent.
The slurry being obtained is sent coating machine to carry out pole coating, then collocation conventional anode piece, barrier film and electrolyte are often pressed
Rule technique makes lithium ion battery.
Comparative example 4
Add 3 parts of binding agent PVDF and 50 parts of NMP in double planetary mixer, revolution speed is 20r/min, rotational velocity
For 100r/min, vacuumize stirring 20min；Add 3 parts of conductive agent carbon blacks, revolution speed is 40r/min, rotational velocity is
400r/min, vacuumizes stirring 10min；Add 50 parts of nickel-cobalt-manganese ternary materials in three times, revolution speed is 40r/min, rotation
Speed is 400r/min, vacuumizes stirring 30min, obtains just slurry material；
First slurry material is obtained anode sizing agent with sand mill grinding distribution 120min, the slurry being obtained is sent coating machine to carry out
Pole coating, then lithium ion battery made by collocation conventional anode piece, barrier film and electrolyte.
Embodiment 5
Add 3 parts of binding agent PVDF and 50 parts of NMP in double planetary mixer, revolution speed is 20r/min, rotational velocity
For 100r/min, vacuumize stirring 30min；Add 3 parts of conductive agent carbon fibers, revolution speed is 40r/min, rotational velocity is
300r/min, vacuumizes stirring 10min；Add 50 parts of nickel manganese binary materials in three times, revolution speed is 40r/min, from rotating speed
Spend for 300r/min, vacuumize stirring 30min, obtain just slurry material；
By first slurry material high-pressure pump formation linear velocity be 40m/s, 3 bursts of jet of stock of a diameter of 5mm inject dispersion tank
In, jet clashes in dispersion tank, is vacuum state in dispersion process dispersion tank, continues spray dispersion 120min, dispersion
Terminate to be filled with nitrogen in backward dispersion tank, shed vacuum, prepared anode sizing agent.
Slurry is sent coating machine to carry out pole coating, then lithium ion made by collocation conventional anode piece, barrier film and electrolyte
Battery.
Comparative example 5
Add 3 parts of binding agent PVDF and 50 parts of NMP in double planetary mixer, revolution speed is 20r/min, rotational velocity
For 100r/min, vacuumize stirring 30min；Add 3 parts of conductive agent carbon fibers, revolution speed is 40r/min, rotational velocity is
300r/min, vacuumizes stirring 10min；Add 50 parts of nickel manganese binary materials in three times, revolution speed is 40r/min, from rotating speed
Spend for 300r/min, vacuumize stirring 30min, obtain just slurry material；
First slurry material is obtained anode sizing agent with high shear dispersion machine dispersion 120min, the slurry being obtained is sent coating machine to enter
Row pole coating, then lithium ion battery made by collocation conventional anode piece, barrier film and electrolyte.
Embodiment 6
Add 3 parts of binding agent PVDF and 50 parts of NMP in double planetary mixer, revolution speed is 20r/min, rotational velocity
For 100r/min, vacuumize stirring 15min；Add 3 parts of conductive agent carbon fibers, revolution speed is 40r/min, rotational velocity is
400r/min, vacuumizes stirring 10min；Add 50 parts of lithium nickelates in three times, revolution speed is 40r/min, rotational velocity is
400r/min, vacuumizes stirring 30min, obtains just slurry material；
By first slurry material high-pressure pump formation linear velocity be 30m/s, 4 bursts of jet of stock of a diameter of 6mm inject dispersion tank
In, there is head-on collision dispersion in jet in dispersion tank, be vacuum state, continue spray dispersion 120min in dispersion process dispersion tank,
Dispersion terminates to be filled with nitrogen in backward dispersion tank, sheds vacuum, prepared anode sizing agent.
Slurry is sent coating machine to carry out pole coating, then lithium ion made by collocation conventional anode piece, barrier film and electrolyte
Battery.
Comparative example 6
Add 3 parts of binding agent PVDF and 50 parts of NMP in double planetary mixer, revolution speed is 20r/min, rotational velocity
For 100r/min, vacuumize stirring 15min；Add 3 parts of conductive agent carbon fibers, revolution speed is 40r/min, rotational velocity is
400r/min, vacuumizes stirring 10min；Add 50 parts of lithium nickelates in three times, revolution speed is 40r/min, rotational velocity is
400r/min, vacuumizes stirring 30min, obtains just slurry material；
First slurry material is obtained anode sizing agent with high shear dispersion machine dispersion 120min, slurry is sent coating machine to carry out pole piece
Coating, then lithium ion battery made by collocation conventional anode piece, barrier film and electrolyte.
The battery that embodiment 4-6 and comparative example 4-6 are obtained carries out battery K value, short-circuit ratio and cycle life test,
Test result is as shown in table 2.From the Comparative result of table 2, using dispersion technology of the present invention, compare sand mill and high shear divides
Other dispersion technologies such as scattered machine, can substantially reduce self-discharge of battery speed, reduce battery short circuit risk, improve the circulating battery longevity
Life.
Table 2
Embodiment 7
Add 3 parts of binding agent PVDF and 50 parts of NMP in double planetary mixer, revolution speed is 20r/min, rotational velocity
For 100r/min, vacuumize stirring 15min；Add 3 parts of conductive agent carbon blacks, revolution speed is 40r/min, rotational velocity is
500r/min, vacuumizes stirring 10min；Add 50 parts of lithium titanates in three times, revolution speed is 40r/min, rotational velocity is
500r/min, vacuumizes stirring 30min；Obtain just slurry material；
First slurry material high-pressure pump is formed linear velocity 30m/s, 3 bursts of jet of stock of diameter 5mm are injected in dispersion tank, penetrate
There is head-on collision dispersion in stream in dispersion tank, keep vacuum state in dispersion process dispersion tank, continues spray dispersion 180min, dispersion
Terminate to be filled with nitrogen in backward dispersion tank, shed vacuum；
The cathode size being obtained is sent coating machine to carry out pole coating, then collocation conventional cathode piece, barrier film and electrolyte
Lithium ion battery is made using common process.
Comparative example 7
Add 3 parts of binding agent PVDF and 50 parts of NMP in double planetary mixer, revolution speed is 20r/min, rotational velocity
For 100r/min, vacuumize stirring 15min；Add 3 parts of conductive agent carbon blacks, revolution speed is 40r/min, rotational velocity is
500r/min, vacuumizes stirring 10min；Add 50 parts of lithium titanates in three times, revolution speed is 40r/min, rotational velocity is
500r/min, vacuumizes stirring 30min, obtains just slurry material；
First slurry material high-pressure pump is formed linear velocity 30m/s, 3 bursts of jet of stock of diameter 5mm are injected in dispersion tank, penetrate
There is head-on collision dispersion in stream in dispersion tank, dispersion process dispersion tank does not vacuumize, and continues spray dispersion 180min, prepared negative pole slurry
Material；
Slurry is sent coating machine to be coated with, then lithium ion battery made by collocation conventional cathode piece, barrier film and electrolyte.
Embodiment 8
Add 10 parts of solid electrolytes and 50 parts of NMP in double planetary mixer, revolution speed is 20r/min, from rotating speed
Spend for 100r/min, vacuumize stirring 15min；Add 3 parts of conductive agent carbon blacks, revolution speed is 40r/min, rotational velocity is
500r/min, vacuumizes stirring 10min；Add 50 parts of LiMn2O4s in three times, revolution speed is 40r/min, rotational velocity is
500r/min, vacuumizes stirring 30min, obtains just slurry material；
First slurry material high-pressure pump is formed linear velocity 30m/s, 3 bursts of jet of stock of diameter 5mm are injected in dispersion tank, penetrate
There is head-on collision dispersion in stream in dispersion tank, keep vacuum state in dispersion process dispersion tank, continues spray dispersion 180min, dispersion
Terminate to be filled with nitrogen in backward dispersion tank, shed vacuum, prepared anode sizing agent；
Slurry is sent coating machine to be coated with, then collocation conventional anode piece, barrier film and solid electrolyte film routinely technique system
Become all-solid lithium-ion battery.
Comparative example 8
Add 10 parts of solid electrolytes and 50 parts of NMP in double planetary mixer, revolution speed is 20r/min, from rotating speed
Spend for 100r/min, vacuumize stirring 15min；Add 3 parts of conductive agent carbon blacks, revolution speed is 40r/min, rotational velocity is
500r/min, vacuumizes stirring 10min；Add 50 parts of LiMn2O4s in three times, revolution speed is 40r/min, rotational velocity is
500r/min, vacuumizes stirring 30min, obtains just slurry material；
First slurry material high-pressure pump is formed linear velocity 30m/s, 3 bursts of jet of stock of diameter 5mm are injected in dispersion tank, penetrate
There is head-on collision dispersion in stream in dispersion tank, do not vacuumize in dispersion process dispersion tank, continues spray dispersion 180min, prepared positive pole
Slurry；
Slurry is sent coating machine to be coated with, then collocation conventional anode piece, barrier film and solid electrolyte film make all solid lithium
Ion battery.
Embodiment 9
Add 3 parts of binding agent PVDF and 50 parts of NMP in double planetary mixer, revolution speed is 20r/min, rotational velocity
For 100r/min, vacuumize stirring 15min；Add 3 parts of conductive agent carbon blacks, revolution speed is 40r/min, rotational velocity is
500r/min, vacuumizes stirring 10min；Add 50 parts of nickel cobalt aluminium ternary materials in three times, revolution speed is 40r/min, rotation
Speed is 500r/min, vacuumizes stirring 30min, obtains just slurry material；
First slurry material is formed 3 bursts of jet of stock of linear velocity 30m/s, diameter 5mm with high-pressure pump, jet is in dispersion tank
There is head-on collision dispersion, in dispersion process dispersion tank, keep vacuum state, continue spray dispersion 180min, dispersion terminates backward dispersion
It is filled with nitrogen in tank, shed vacuum, prepared positive pole slurry；
Slurry is sent coating machine to be coated with, then lithium ion battery made by collocation conventional anode piece, barrier film and electrolyte.
Comparative example 9
Add 3 parts of binding agent PVDF and 50 parts of NMP in double planetary mixer, revolution speed is 20r/min, rotational velocity
For 100r/min, vacuumize stirring 15min；Add 3 parts of conductive agent carbon blacks, revolution speed is 40r/min, rotational velocity is
500r/min, vacuumizes stirring 10min；Add 50 parts of nickel cobalt aluminium ternary materials in three times, revolution speed is 40r/min, rotation
Speed is 500r/min, vacuumizes stirring 30min, obtains just slurry material；
First slurry material high-pressure pump is formed linear velocity 30m/s, 3 bursts of jet of stock of diameter 5mm are injected in dispersion tank, penetrate
There is head-on collision dispersion in stream in dispersion tank, do not vacuumize in dispersion process dispersion tank, continues spray dispersion 180min, prepared positive pole
Slurry；
Slurry is sent coating machine to be coated with, then lithium ion battery made by collocation conventional anode piece, barrier film and electrolyte.
The battery that embodiment 7-9 and comparative example 7-9 are obtained carries out the internal resistance of cell, circulation flatulence situation and cycle life and surveys
Examination, test result as shown in table 3, is contrasted from table 3, and the holding vacuum technique in spray dispersion technology of the present invention is empty in dispersion
Play important function during the material of air-sensitive sense, can obviously reduce the internal resistance of cell, reduced circulating battery flatulence degree, improve battery
Cycle life.
Table 3
| The internal resistance of cell (m Ω) | Circulation flatulence situation | Cycle life | |
| Comparative example 7 | 71 | Serious flatulence | 8000 |
| Embodiment 7 | 59 | Slight flatulence | 15000 |
| Comparative example 8 | 93 | Slight expansion | 300 |
| Embodiment 8 | 65 | No expand | 500 |
| Comparative example 9 | 67 | Slight flatulence | 800 |
| Embodiment 9 | 44 | No flatulence | 1100 |
The slurry preparation method of the present invention is applied to the preparation of various pulp of lithium ion battery, to the classification of slurry, composition
It is not particularly limited with concentration, can be used for preparing lithium ion battery anode glue size or cathode size；The solvent of slurry can be water
Or organic solvent or their mixed system；The main material of slurry can be graphite, silicium cathode material, silicon-carbon composite cathode
Material, lithium titanate, LiFePO4, cobalt acid lithium, LiMn2O4, lithium nickelate, nickel manganese binary material, nickel-cobalt-manganese ternary material, nickel cobalt aluminium
Ternary material etc.；Slurry can contain conductive agent (as carbon black, carbon fiber, CNT, Graphene etc.), bonding as needed
The other compositions such as agent, dispersant；Solid electrolyte can also be added, in order to produce solid lithium battery in slurry.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple modifications to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to embodiment illustrated herein, and be to fit to consistent with principles disclosed herein and features of novelty
Widest range.
Claims (10)
1. the preparation method of pulp of lithium ion battery is it is characterised in that comprise the following steps：
Preparation just slurry material；
The jet that just slurry material forms 2 strands or more than 2 strands is made to inject in dispersion tank through nozzle using high-pressure pump, jet is in dispersion tank
Middle constant collision dispersion；
A diameter of 2～50mm of described jet, the linear velocity of jet is 5～100m/s.
2. pulp of lithium ion battery as claimed in claim 1 preparation method it is characterised in that：A diameter of the 4 of described jet
～20mm, the linear velocity of jet is 10～50m/s.
3. pulp of lithium ion battery as claimed in claim 1 preparation method it is characterised in that：It is laggard that jet injects dispersion tank
Keep vacuum state in dispersion tank during row is scattered until slurry dispersion completes, then into dispersion tank, be filled with indifferent gas
Body, makes nitrogen be full of dispersion tank and sheds vacuum.
4. pulp of lithium ion battery as claimed in claim 1 preparation method it is characterised in that：Described nozzle is arranged at dispersion
In the upper portion side wall of tank, nozzle entrance port is located on slurry liquid face in dispersion tank.
5. the pulp of lithium ion battery as described in claim 1 or 4 preparation method it is characterised in that：Described nozzle is located at and divides
The same level height of scattered tank, circumferentially uniform intervals are arranged on dispersion pot sidewall described nozzle.
6. pulp of lithium ion battery as claimed in claim 1 preparation method it is characterised in that：The point of impingement of jet is located at and divides
On the center line of scattered tank.
7. pulp of lithium ion battery as claimed in claim 1 preparation method it is characterised in that：Right in slurry dispersion process
In dispersion tank, slurry is cooled down.
8. pulp of lithium ion battery as claimed in claim 7 preparation method it is characterised in that：The tank skin tool of described dispersion tank
There are hollow layer, hollow intrastratal flow coolant.
9. pulp of lithium ion battery as claimed in claim 1 preparation method it is characterised in that：Using churned mechanically mode
Preparation just slurry material.
10. pulp of lithium ion battery as claimed in claim 9 preparation method it is characterised in that：Using double planetary mixer
Or machine mixer preparation just slurry material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610658658.0A CN106450465A (en) | 2016-11-21 | 2016-11-21 | Preparation method of slurry of lithium-ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610658658.0A CN106450465A (en) | 2016-11-21 | 2016-11-21 | Preparation method of slurry of lithium-ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106450465A true CN106450465A (en) | 2017-02-22 |
Family
ID=58184374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610658658.0A Pending CN106450465A (en) | 2016-11-21 | 2016-11-21 | Preparation method of slurry of lithium-ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106450465A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112038547A (en) * | 2019-06-03 | 2020-12-04 | 河北金力新能源科技股份有限公司 | Ceramic coating slurry without dispersant, preparation method thereof, lithium battery diaphragm and lithium battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1268967A (en) * | 1998-09-22 | 2000-10-04 | 第一毛织株式会社 | Method for preparing metallic oxides sludge for chemical mechanical polishing for semiconductor |
| CN101986072A (en) * | 2010-12-02 | 2011-03-16 | 恒正科技（苏州）有限公司 | Ball milling rotary furnace capable of feeding by adopting slurry jetting and application thereof |
| CN105247640A (en) * | 2013-05-27 | 2016-01-13 | 日本贵弥功株式会社 | Electrode, electric double-layer capacitor using said electrode, and method for manufacturing said electrode |
-
2016
- 2016-11-21 CN CN201610658658.0A patent/CN106450465A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1268967A (en) * | 1998-09-22 | 2000-10-04 | 第一毛织株式会社 | Method for preparing metallic oxides sludge for chemical mechanical polishing for semiconductor |
| CN101986072A (en) * | 2010-12-02 | 2011-03-16 | 恒正科技（苏州）有限公司 | Ball milling rotary furnace capable of feeding by adopting slurry jetting and application thereof |
| CN105247640A (en) * | 2013-05-27 | 2016-01-13 | 日本贵弥功株式会社 | Electrode, electric double-layer capacitor using said electrode, and method for manufacturing said electrode |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112038547A (en) * | 2019-06-03 | 2020-12-04 | 河北金力新能源科技股份有限公司 | Ceramic coating slurry without dispersant, preparation method thereof, lithium battery diaphragm and lithium battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110767877B (en) | Lithium ion battery silicon monoxide negative electrode material and preparation method and application thereof | |
| CN101106194B (en) | Cathode material Li3V2(PO4)3 of lithium ion battery and its making method | |
| CN106207094B (en) | A kind of lithium battery graphene conductive slurry and preparation method thereof | |
| CN101145611B (en) | Lithium ion cell anode material lithium vanadium phosphate preparation method | |
| CN104617269B (en) | A kind of silicon alloy composite negative pole material, preparation method and lithium ion battery | |
| CN106067547A (en) | Carbon-coated nano 3 SiC 2/graphite alkene cracks carbon-coating composite, preparation method and the lithium ion battery comprising this composite | |
| CN102637847B (en) | Method for preparing high-dispersity lithium battery anode and cathode slurry | |
| CN107565112A (en) | A kind of preparation method of graphene coated lithium ion secondary battery anode material | |
| CN107994286A (en) | A kind of recycling of waste and old power battery anode material of automobile and regenerated process | |
| CN106229505A (en) | A kind of high-density spherical nano lithium iron phosphate material and preparation method thereof and the lithium ion battery comprising it | |
| CN104752696A (en) | Preparation method of graphene-based silicon and carbon composite negative electrode material | |
| CN104332657A (en) | Lithium ion battery lithium-enriching technology and lithium ion battery prepared by the technology | |
| CN104425820A (en) | Lithium ferric manganese phosphate material and preparation method thereof and lithium ion battery cathode material | |
| WO2021129125A1 (en) | Silicon-carbon composite negative electrode material with hollow core-shell structure, and preparation method therefor | |
| CN106784694A (en) | A kind of preparation method of lithium ferric phosphate/grapheme composite positive electrode material and lithium ion battery | |
| CN107464929A (en) | Preparation method, anode material for lithium-ion batteries and the lithium ion battery of nickel-cobalt lithium manganate cathode material | |
| CN111477841A (en) | Lithium battery pole piece and preparation method thereof | |
| CN104241696A (en) | Lithium ion battery with high energy density and preparation method of lithium ion battery with high energy density | |
| CN110350161A (en) | A kind of preparation method of silicon-carbon cathode presoma | |
| CN106450330B (en) | A kind of special isomery graphene conductive agent of lithium battery and preparation method thereof | |
| CN104425822B (en) | A kind of graphite negative material of lithium ion battery and preparation method thereof | |
| CN105655561A (en) | Synthesis method of lithium manganese phosphate nanosheets | |
| CN109244464A (en) | A kind of graphene anode sizing agent and efficient controllable method for preparing | |
| CN109192959A (en) | A kind of cobalt nickel lithium manganate ternary material and preparation method thereof loading graphene | |
| CN102290576B (en) | Multi-doped lithium phosphate anode material, preparation method and lithium ion power cell thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170222 |
|
| RJ01 | Rejection of invention patent application after publication |