CN107665971A - A kind of lithium ion cell electrode raw material decentralized approach early stage - Google Patents
A kind of lithium ion cell electrode raw material decentralized approach early stage Download PDFInfo
- Publication number
- CN107665971A CN107665971A CN201610613516.2A CN201610613516A CN107665971A CN 107665971 A CN107665971 A CN 107665971A CN 201610613516 A CN201610613516 A CN 201610613516A CN 107665971 A CN107665971 A CN 107665971A
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- China
- Prior art keywords
- lithium ion
- raw material
- early stage
- ion cell
- decentralized approach
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
- B01F31/50—Mixers with shaking, oscillating, or vibrating mechanisms with a receptacle submitted to a combination of movements, i.e. at least one vibratory or oscillatory movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/05—Mixers using radiation, e.g. magnetic fields or microwaves to mix the material
- B01F33/052—Mixers using radiation, e.g. magnetic fields or microwaves to mix the material the energy being electric fields for electrostatically charging of the ingredients or compositions for mixing them
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides a kind of decentralized approach lithium ion battery early stage, it comprises the following steps：(1) weighing：Weigh one or more powders of LFP, KS 6 and SP series of certain mass；(2) electrostatic dispersion：Like charges on powder band are made by a set of electrostatic dispersion device after the powder weighed is mixed；(3) dispensing：By the above-mentioned powder being collected into along with glue and nmp solvent obtain positive pole/cathode size after mechanical agitation.Compared with prior art, the present invention combines Coulomb's law principle, by using a set of simple electrostatic equipment, has obtained more high-quality and has been not susceptible to the superfine powder reunited.As can be seen here, operating procedure of the present invention is simple, and dust dispersion quality is more preferable, and faster, prepared electrode slice more easily reachs the performance requirement of lithium battery to speed.
Description
【Technical field】
The present invention relates to technical field of lithium ion, more particularly to a kind of lithium ion cell electrode raw material to disperse early stage
Processing method.
【Background technology】
Lithium ion battery as new green power because of its high power capacity, have extended cycle life, the property that memory-less effect etc. is unique
Can, it was widely used in recent years on the energy-storage systems such as 3C/3G mobile phones, notebook computer, electric automobile.Be widely applied so that
People require higher to the cost performance of lithium battery, how to reduce lithium battery cost, the performance for improving lithium battery is instantly urgent is essential
Technical problems to be solved.
The advantages that ferric phosphate lithium cell is due to having a safety feature, raw material sources are extensive, cheap, rapidly become lithium electricity
The ideal product in pond field.But its poorly conductive, the problems such as lithium ion diffusion velocity is slow, turn into again and restrict lithium ion battery production
The new problem of industry development.For at present, reduce LiFePO 4 powder diameter, shorten lithium ion diffusion length be it is a kind of improve lithium from
The effective ways of sub- battery performance.However, LiFePO 4 material (such as the ferric phosphate of superfines particle of small size particle diameter
Lithium) though there is good chemical property, simultaneously there is also superfines particle in processing characteristics some are common special
Point --- superfines has larger specific surface area and higher specific surface energy, in thermodynamic instability state, working process
During particle coagulation, reunion easily occurs, form second particle and particle diameter is become big, lose small size particle diameter LiFePO4 material
The possessed advantage of material.
At present, mainly have to lithium ion cell electrode raw material decentralized approach early stage：Mechanical agitation is scattered, ultrasound shake
Swing scattered and dispersant etc..The scattered dispersive property of mechanical agitation is general, is dispersed with stirring ageing not long and once leaves
Stirring action, powder are possible to re-form reunion again；Ultrasonic vibration is scattered, and once the problem of existing is stopping supersonic oscillations,
It is possible to making superfines reunite once again, after being ultrasonically treated a period of time, the particle diameter of particle can not further reduce, and continue
Ultrasound can also cause the reunion of superfines again；The dispersiveness of Dispersant on Superfine powder has important regulative, but divides
The dosage control difficulty of powder is big, excessive and very few can not all reach good dispersion effect, in some instances it may even be possible to makes superfines group
Poly- and dispersant addition can cause the reduction of active material (such as LiFePO4) ratio, cause battery capacity to be lost.
In view of this, it is necessory to provide, one kind is simple to operate, dust dispersion quality is good, speed is fast, free of contamination lithium-ion electric
Pond electrode raw material decentralized approach early stage overcomes drawbacks described above.
【The content of the invention】
The technical problem to be solved in the present invention is to provide a kind of lithium ion battery raw material decentralized approach early stage, uses
Positive pole/cathode size dispersive property prepared by this processing method is good, and the battery polarization of preparation is small, and internal resistance is low, cycle life
It is long, there is good chemical property.
To achieve these goals, the invention provides a kind of decentralized approach lithium ion battery early stage, it include with
Lower step：
(1) weighing：Weigh one or more powders of LFP, KS-6 and SP series of certain mass；
(2) electrostatic dispersion：Electricity of the same race on powder band is made by a set of electrostatic dispersion device after the powder weighed is mixed
Lotus；
(3) dispensing：By the above-mentioned powder being collected into along with glue and nmp solvent obtain positive pole/negative after mechanical agitation
Pole slurry.
As lithium ion cell electrode raw material of the present invention early stage decentralized approach a kind of improving, the electrostatic point
It is in bulk to put including electrostatic dispersion storehouse, charge device is provided with electrostatic dispersion storehouse, the charge device includes corona electrode and electrostatic
Pole, the corona electrode and stationary electrode are external to the break-make loop of high voltage power supply and power switch composition.
As lithium ion cell electrode raw material of the present invention early stage decentralized approach a kind of improving, the corona electricity
Pole is made up of electrode insulation support and longer corona electrode.
As lithium ion cell electrode raw material of the present invention early stage decentralized approach a kind of improving, the electrostatic point
The surface for dissipating storehouse is provided with dispenser, and dispenser is interior to be provided with vibrating motor, and the electrode raw material in dispenser is in certain vibration
Electrostatic dispersion storehouse is dispersed under frequency, electrostatic dispersion storehouse is arranged right below collecting bin, and it is used to collect from electrostatic dispersion storehouse
The particle of the electrode raw material with like charges fallen.
As lithium ion cell electrode raw material of the present invention early stage decentralized approach a kind of improving, make on powder band
The optional contact of the method for electric charge is powered, induction charging, electron beam irradiation are powered or corona charging.
As lithium ion cell electrode raw material of the present invention early stage decentralized approach a kind of improving, the vibration electricity
The vibration frequency of machine is 30-80Hz.
As lithium ion cell electrode raw material of the present invention early stage decentralized approach a kind of improving, the charged dress
The voltage that high voltage power supply is can adjust in putting is 10-80KV.
As lithium ion cell electrode raw material of the present invention early stage decentralized approach a kind of improving, the glue by
PVDF and NMP slurries form.
As lithium ion cell electrode raw material of the present invention early stage decentralized approach a kind of improving, the machinery stirs
The process conditions mixed are 1000~2000r/min.
Compared with prior art, the present invention combines Coulomb's law principle, by using a set of simple electrostatic equipment, obtains
It is more high-quality and be not susceptible to the superfine powder reunited.As can be seen here, operating procedure of the present invention is simple, and dust dispersion quality is more preferable,
Faster, prepared electrode slice more easily reachs the performance requirement of lithium battery to speed.
【Brief description of the drawings】
Fig. 1 is the structural representation of electrostatic dispersion device used in the present invention；
Fig. 2 is the positive plate SEM figures of case study on implementation 1 of the present invention；
Fig. 3 is lithium ion battery and the lithium ion battery internal resistance comparison diagram of prior art in case study on implementation 2 of the present invention；
Fig. 4 is the lithium ion battery and prior art lithium ion battery 3C circulation comparison diagrams of case study on implementation 3 of the present invention.
【Embodiment】
The present invention is mutually exclusive based on Coulomb's law like charges, the principle that xenogenesis electric charge attracts each other, and passes through some letters
Single operation makes ultra-micro powder surface form polarity charge of the same race, and Ultramicro-powder is prevented using the repulsive interaction of polarity charge of the same race
End is reunited, so as to reach the purpose for realizing even particulate dispersion.
As shown in figure 1, lithium ion cell electrode raw material decentralized approach early stage of the present invention is related to a kind of electrostatic dispersion
Device 100, it includes the electrostatic dispersion storehouse 10 of cylinder, charge device, the charge device bag being provided with electrostatic dispersion storehouse 10
Corona electrode 11 and stationary electrode 12 are included, wherein, corona electrode 11 is made up of electrode insulation support and longer corona electrode, the corona
The break-make loop that electrode 11 and stationary electrode 12 are external to high voltage power supply 13 and power switch 14 forms.The electrostatic dispersion storehouse 10
Surface is provided with dispenser 20, is provided with vibrating motor in dispenser 20, the electrode raw material in dispenser in certain vibration frequently
Electrostatic dispersion storehouse 10 is dispersed under rate, electrostatic dispersion storehouse 10 is arranged right below collecting bin 30, and it is used to collect from electrostatic dispersion
The particle of the electrode raw material with like charges fallen in storehouse 10.
The invention provides lithium ion cell electrode raw material decentralized approach early stage, especially by following implementation
Case illustrates：
Embodiment 1, lithium ion cell electrode raw material decentralized approach early stage of the present invention comprise the following steps：
(1) weighing：Weigh the LFP powders of certain mass；
(2) electrostatic dispersion：The powder weighed is made into like charges on powder band by a set of electrostatic dispersion device：First
The above-mentioned powder weighed is entered into electrostatic dispersion storehouse after dispenser vibration dispersion, in the present embodiment, the vibration electricity of use
The vibration frequency of machine is 30Hz；Then the powder in electrostatic dispersion storehouse will be entered by same on the charge device band in electrostatic dispersion storehouse
Enter powder collecting bin after kind electric charge, in this process, the voltage that can adjust high voltage power supply is 10KV；
(3) dispensing：By the powder after electrostatic dispersion is handled, along with glue, nmp solvent 1000r/min condition
Anode sizing agent is obtained after lower carry out mechanical agitation.
Finally, by gained anode sizing agent is coated, roll-in, slitting, winding, assembling, fluid injection, obtains lithium-ion electric after sealing
Pond.
Battery anode slice obtained by the present embodiment 1 is watched under electron scanning Electronic Speculum obtains positive plate as shown in Figure 2
Surface topography map.Figure it is seen that under the decentralized approach of the present invention positive plate diameter for preparing between 1-5 μm,
And size distribution is more uniform, soilless sticking phenomenon occurs.
Case study on implementation 2, lithium ion cell electrode raw material decentralized approach early stage of the present invention comprise the following steps：
(1) weighing：Weigh certain mass than LFP powders, KS-6 powders, SP powders；
(2) electrostatic dispersion：Electricity of the same race on powder band is made by a set of electrostatic dispersion device after the powder weighed is mixed
Lotus：The above-mentioned powder weighed is entered into electrostatic dispersion storehouse, in the present embodiment, use after dispenser vibration dispersion first
The vibration frequency of vibrating motor is 55Hz；Then the powder in electrostatic dispersion storehouse will be entered by the charge device in electrostatic dispersion storehouse
Enter powder collecting bin after taking like charges, in this process, the voltage that can adjust high voltage power supply is 45KV；
(3) dispensing：By the powder after electrostatic dispersion is handled, along with glue, nmp solvent 1500r/min condition
Anode sizing agent is obtained after lower mechanical agitation.
By gained anode sizing agent is coated, roll-in, slitting, winding, assembling, fluid injection, obtains lithium ion battery after sealing.Again
Obtained lithium ion battery is numbered, inner walkway is carried out, obtains one group of data as shown in table 1.Again by prior art
Internal resistance of cell test data contrasted, obtain lithium battery internal resistance comparison diagram as shown in Figure 3, can be with by table 1 and Fig. 3
Find out, the internal resistance of the lithium ion battery prepared with the present invention is below prior art battery between 5.5m Ω to 5.8m Ω
(between 5.9m Ω to 6.3m Ω), and the about low 0.5m Ω of average internal resistance.
Table 1 is the inner walkway data of lithium ion battery and traditional lithium-ion battery obtained by the present invention
Embodiment 3, lithium ion cell electrode raw material decentralized approach early stage of the present invention comprise the following steps：
(1) weighing：KS-6 and SP powders are weighed by certain mass ratio；
(2) electrostatic dispersion：Electricity of the same race on powder band is made by a set of electrostatic dispersion device after the powder weighed is mixed
Lotus：The above-mentioned powder weighed is entered into electrostatic dispersion storehouse, in the present embodiment, use after dispenser vibration dispersion first
The vibration frequency of vibrating motor is 80Hz；Then the powder in electrostatic dispersion storehouse will be entered by the charge device in electrostatic dispersion storehouse
Enter powder collecting bin after taking like charges, in this process, the voltage that can adjust high voltage power supply is 80KV；
(3) dispensing：By the powder after electrostatic dispersion is handled, along with glue, nmp solvent 2000r/min condition
Anode sizing agent is obtained after lower mechanical agitation.
By gained anode sizing agent is coated, roll-in, slitting, winding, assembling, fluid injection, obtains lithium ion battery after sealing.Will
Lithium ion battery obtained by previous embodiment 3, it is held after being circulated 200 weeks under 3C multiplying powers with prior art lithium ion battery
Amount tested to obtain result as shown in Figure 4, as can be seen from Figure 4 100 weeks circulation before, lithium ion battery of the invention with
Both prior art lithium ion batteries performance difference is little, and its capability retention is 97.5% or so；Circulated more than 100 weeks
Afterwards, the two performance difference is notable, and when reaching circulation in 200 weeks, present invention gained lithium battery capacity conservation rate still can reach
96%, and the battery capacity conservation rate of prior art lithium battery only has 91%.As can be seen here, the cyclicity of present invention gained battery
Can be good.
Above is in order that the purpose of the present invention, technical scheme and advantageous effects become apparent from understanding, with reference to accompanying drawing
And embodiment, the present invention will be described in further detail.It should be appreciated that the specific reality described in this specification
Mode is applied just for the sake of explaining the present invention, is not intended to limit the present invention.
Claims (9)
1. a kind of decentralized approach early stage of lithium ion cell electrode raw material, comprises the following steps：
(1) weighing：Weigh one or more powders of LFP, KS-6 and SP series of certain mass；
(2) electrostatic dispersion：Like charges on powder band are made by a set of electrostatic dispersion device after the powder weighed is mixed；
(3) dispensing：By the above-mentioned powder being collected into along with glue and nmp solvent obtain positive pole/negative pole slurry after mechanical agitation
Material.
2. decentralized approach early stage of lithium ion cell electrode raw material as claimed in claim 1, it is characterised in that：It is described
Electrostatic dispersion device includes electrostatic dispersion storehouse, charge device being provided with electrostatic dispersion storehouse, and the charge device includes corona electrode
And stationary electrode, the corona electrode and stationary electrode are external to the break-make loop of high voltage power supply and power switch composition.
3. decentralized approach early stage of lithium ion cell electrode raw material as claimed in claim 2, it is characterised in that：It is described
Corona electrode is made up of electrode insulation support and longer corona electrode.
4. decentralized approach early stage of lithium ion cell electrode raw material as claimed in claim 2, it is characterised in that：It is described
The surface in electrostatic dispersion storehouse is provided with dispenser, is provided with vibrating motor in dispenser, and the electrode raw material in dispenser is certain
Vibration frequency under be dispersed to electrostatic dispersion storehouse, electrostatic dispersion storehouse is arranged right below collecting bin, and it is used to collect from electrostatic point
Dissipate the particle of the electrode raw material with like charges fallen in storehouse.
5. decentralized approach early stage of lithium ion cell electrode raw material as claimed in claim 1, it is characterised in that：Make powder
The powered, induction charging of the optional contact of the method for electric charge, electron beam irradiation be powered on body band or corona charging.
6. decentralized approach early stage of lithium ion cell electrode raw material as claimed in claim 4, it is characterised in that：It is described
The vibration frequency of vibrating motor is 30-80Hz.
7. decentralized approach early stage of lithium ion cell electrode raw material as claimed in claim 2, it is characterised in that：It is described
The voltage that high voltage power supply is can adjust in charge device is 10-80KV.
8. decentralized approach early stage of the lithium ion cell electrode raw material as described in claim 1-7 is any, its feature exist
In：The glue is made up of PVDF and NMP slurries.
9. decentralized approach early stage of the lithium ion cell electrode raw material as described in claim 1-7 is any, its feature exist
In：The churned mechanically process conditions are 1000~2000r/min.
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| CN201610613516.2A CN107665971A (en) | 2016-07-29 | 2016-07-29 | A kind of lithium ion cell electrode raw material decentralized approach early stage |
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| CN201610613516.2A CN107665971A (en) | 2016-07-29 | 2016-07-29 | A kind of lithium ion cell electrode raw material decentralized approach early stage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110189920A (en) * | 2019-06-11 | 2019-08-30 | 中国振华(集团)新云电子元器件有限责任公司(国营第四三二六厂) | A kind of conductive polymer electrodes material and preparation method thereof and aluminium electrolutic capacitor |
| CN115069112A (en) * | 2022-06-27 | 2022-09-20 | 广东电网有限责任公司 | Charged dispersing device for nano powder filler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110189920A (en) * | 2019-06-11 | 2019-08-30 | 中国振华(集团)新云电子元器件有限责任公司(国营第四三二六厂) | A kind of conductive polymer electrodes material and preparation method thereof and aluminium electrolutic capacitor |
| CN110189920B (en) * | 2019-06-11 | 2022-03-04 | 中国振华(集团)新云电子元器件有限责任公司(国营第四三二六厂) | Conductive polymer electrode material, preparation method thereof and aluminum electrolytic capacitor |
| CN115069112A (en) * | 2022-06-27 | 2022-09-20 | 广东电网有限责任公司 | Charged dispersing device for nano powder filler |
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Application publication date: 20180206 |