CN108767232A - A kind of method for coating of anode material for lithium-ion batteries - Google Patents
A kind of method for coating of anode material for lithium-ion batteries Download PDFInfo
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- CN108767232A CN108767232A CN201810554212.2A CN201810554212A CN108767232A CN 108767232 A CN108767232 A CN 108767232A CN 201810554212 A CN201810554212 A CN 201810554212A CN 108767232 A CN108767232 A CN 108767232A
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- lithium
- ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of method for coating of anode material for lithium-ion batteries.This method grinds equipment by using dish nest, by the anode material for lithium-ion batteries coated in the form of solid powder, continuous input dish nest mill, the cavity that solid powder is ground in dish nest is disperseed by high-speed rotating impeller and disk, multiplex nested eddy flow is formed between disk and distinctive liner plate, gas shock power therebetween can fully break up solid powder.Simultaneously by the control of rotary speed, dusty material can be made or keep pattern, or is pulverized.Covering material to be to enter dish nest mill in a manner of by spraying simultaneously in the form of solution or slurry, uniformly contact with the solid powder particle that is wrapped by with certain temperature and completes to coat.The technique can greatly simplify traditional cladding process of current anode material for lithium-ion batteries, and production capacity greatly improves, and coating product effect greatly improves, and cost is decreased obviously.
Description
Technical field
The present invention relates to a kind of method for coating of anode material for lithium-ion batteries, belong to anode material for lithium-ion batteries preparation
Field.
Background technology
It is notable that lithium ion battery has the advantages that operating voltage is high, bigger than energy, safety is good, energy density is big etc., is
Current most competitive secondary cell.Its chemical property depends primarily on the oxygen that electrode used therein material occurs in the electrolytic solution
Change the degree and stability of reduction reaction, the former determines that the energy output size of battery, the latter determine the charge and discharge of battery
Service life.Since lithium ion battery needs work at higher voltages (being usually 3-4.3V), the stabilization at electrode/electrolyte interface
Property is the key that cycle life.Since the anode material for lithium-ion batteries used at present is typically all inorganic powder grains, compared with
Big specific surface area is easy that side reaction occurs with electrolyte, is not the energy density for reducing battery, also influences the service life of battery.
Therefore, it in commercial Application, generally requires to modify electrode material surface, the means most frequently used are exactly surface packet
It covers.
Electrode active material surface coats layer of substance, typically inorganic nano dusty material, it is possible to reduce or avoid electricity
Active material and electrolyte in the material of pole are in direct contact, and to inhibit the generation of electrode and electrolyte side reaction, inhibit material
Expect that the structure in charge and discharge process is destroyed, improves the structural stability of material surface, increase the cycle life of material.It is right
In nickelic ternary NCM materials, since water absorbent surface is strong, it is easy to form lithium hydroxide and lithium carbonate on surface, influences battery
Processing performance can not achieve pole piece and be normally coated with if positive electrode homogenization process easily forms g., jelly-like slurries.Electrode active material
Surface, which coats one layer of nano-oxide, can substantially reduce the water imbibition of material.
The cladding means that anode material for lithium-ion batteries manufacturer routinely uses at present have:(1) dry method coats, i.e., will packet
Material is covered to mix in proportion with the base material being wrapped by, it is by means such as stirring, dispersion, grinding, fusions that they are compound, but
Often there is the shortcomings of covered effect is poor, cladding ratio is small and covering material itself is reunited;(2) wet method coats, i.e., will coat material
Solution or slurry is made in material, and encapsulated material particle is then added, makes cladding material by means such as stirring, ultrasound, dispersion, precipitations
Material is attached to encapsulated material surface, but exists and follow-up solvent, base material and the solvent (such as water) of removing is needed to be easy to happen instead
It answers, coat the disadvantages such as cost height.
Dish nest mill is a kind of novel multi-purpose machine for integrating drying, depolymerization (crushing) and modification, can to filter cake,
The polymorphic material of ooze, slurry, particle, powder is handled, and has many advantages, such as energy-saving and environmental protection, simple for process.Can by coal,
Electricity, heated by natural gas carrier gas, and material is brought into drying cavity by hot carrier gas and be dried, the impeller of special designing in cavity
The disk of different location is largely placed in by high speed rotation, forms multiplex nested eddy flow, gas shock power therebetween, friction
Power and shearing force, it is rapidly that material even height is evenly dispersed.
Invention content
For anode material for lithium-ion batteries in the prior art cladding exist cladding difficulty it is big, clad is uneven, packet
It covers object to react with solvent, coat the uncontrollable defect of matter dimensions, the present invention provides a kind of anode material for lithium-ion batteries
The method of cladding.This is simple for process, easily controllable, environmental-friendly, can scale processing.
To achieve the goals above, the present invention adopts the following technical scheme that:
The anode material for lithium-ion batteries is coated using dish nest mill;First dish nest mill is preheated, dish nest is made to grind
Inlet temperature be 100-400 DEG C, discharge port temperature be 80-120 DEG C, and control engine speed be 1050-2500r/min,
Air mass flow is 2050-6000m3/h;Then lithium ion battery positive material powder is synchronous with the solution containing covering material defeated
Enter in dish nest mill, reaction obtains the anode material for lithium-ion batteries containing clad.
In the inventive solutions, when the positive material solid powder of lithium ion cell electrode is in high speed rotation and air blast
While being highly dispersed and heat in dish nest mill chamber body, liquid phase coating material enters dish nest mill chamber body by way of spraying,
Form a large amount of finely dispersed fine mist particles.These small droplets for containing covering material carry one with high speed dispersion rotation
The solid powder material particle surface of constant temperature degree will form solid clad by rapid vaporization on the surface thereof once contact;?
In several seconds reaction time, you can complete the cladding to anode material for lithium-ion batteries, obtain the lithium ion battery containing clad
Positive electrode.
Preferred scheme, this lithium ion cell positive material of institute are stratiform transition metal anode material for lithium-ion batteries.
As a further preference, the anode material for lithium-ion batteries is selected from LiCoO2、LiCoO2Doped derivatives,
LiMn2O4、LiMn2O4Doped derivatives, Li1+aNixCoyMnzO2(-0.1<a<0.1,0<x<1,0<y<1,0<z<1,0.8<x+y+z
<1.2)、Li1+aNixCoyMnzO2(-0.1<a<0.1,0<x<1,0<y<1,0<z<1,0.8<x+y+z<1.2) doped derivatives,
Li1+aNixCoyAlzO2(-0.1<a<0.1,0<x<1,0<y<1,0<z<1,0.8<x+y+z<1.2)、Li1+aNixCoyAlzO2(-0.1
<a<0.1,0<x<1,0<y<1,0<z<1,0.8<x+y+z<1.2) doped derivatives, mLi2MnO3-(1-m)Li1+aNixCoyMnzO2
(0<m<1,0<n<1,-0.1<a<0.1,0<x<1,0<y<1,0<z<1,0.8<x+y+z<1.2)、mLi2MnO3-(1-m)Li1+ aNixCoyMnzO2(0<m<1,0<n<1,-0.1<a<0.1,0<x<1,0<y<1,0<z<1,0.8<x+y+z<1.2) doped derivatives
At least one of.
As further preferably, the anode material for lithium-ion batteries is selected from LiNi0.6Co0.2Mn0.2O2、LiMn2O4、
LiCoO2At least one of.
Preferred scheme, the covering material are the substance or metal salt of containing metal oxide, the metal salt through 100~
600 DEG C are decomposed into metal oxide.
As a further preference, the metal oxide is titanium dioxide, magnesia, aluminium oxide, zirconium oxide, titanium dioxide
At least one of silicon.
As further preferably, the covering material is selected from aluminum nitrate, aluminum acetate, aluminium isopropoxide, Aluminum sol, metatitanic acid
At least one of four butyl esters, titanium colloidal sol, zirconium nitrate, zirconium oxychloride, magnesium nitrate, magnesium acetate, magnesium hydroxide colloidal sol.
As further preferably, the covering material is selected from least one of Aluminum sol, magnesium acetate, titanium colloidal sol.
Preferred scheme, the solvent in the solution containing covering material are selected from water or organic solvent.
As a further preference, the organic solvent in ethyl alcohol, isopropanol, acetone, carbon tetrachloride at least one
Kind.
Preferred scheme, the solution containing covering material input dish nest mill in the form of spraying.
Preferred scheme first preheats dish nest mill, and it is 200-350 DEG C to make dish nest mill inlet temperature.
Preferably first dish nest mill is preheated as further, it is 200-300 DEG C to make dish nest mill inlet temperature.
Preferred scheme, control engine speed are 1200-2400r/min, air mass flow 2500-5000m3/h。
As a further preference, control engine speed is 1500-2400r/min, air mass flow 3000-4000m3/
h。
Preferred scheme, the lithium ion battery positive material powder and the solid-liquid mass ratio of the solution containing covering material are
5:1-50:1.
As a further preference, the solid-liquid matter of the lithium ion battery positive material powder and the solution containing covering material
Measure ratio 5:1-40:1.
As further preferred, the solid-liquid of the lithium ion battery positive material powder and the solution containing covering material
Mass ratio 5:1-10:1.
The charging rate of preferred scheme, the lithium ion battery positive material powder is 100-500kg/h;It is described to contain packet
The charging rate for covering the solution of material is 10-100kg/h.
As a further preference, the charging rate of the lithium ion battery positive material powder is 200-500kg/h;Institute
The charging rate for stating the solution containing covering material is 20-80kg/h.
The grain size of lithium ion battery positive material powder is not particularly limited in the present invention, those skilled in the art is ripe
The lithium ion battery positive material powder known can be inputted directly from feed inlet.
The thickness of preferred scheme, the clad is 10~100nm.
Preferred scheme, mass fraction of the clad in the anode material for lithium-ion batteries containing clad are
0.01%-1%.Scheme using the present invention is coated, and the content of the clad finally obtained is initial design values, is had
Very strong controllable operating.
Inventor initiate by dish nest mill applied to anode material for lithium-ion batteries cladding, and according to transition metal lithium from
The property of sub- cell positive material and covering material, by a large amount of creative experiments, optimization dish nest grinds out temperature, master
Machine rotating speed, air velocity, anode material for lithium-ion batteries and covering material charge ratio so that the collaboration in above-mentioned technique is made
Under, the anode material for lithium-ion batteries with uniform, controllable clad is obtained.
The discharge port of preferred scheme, the dish nest mill connect with trap, wind turbine successively by pipeline, the wind turbine and
The mill synchronous operation of dish nest continues the anode material for lithium-ion batteries containing clad to be delivered to trap by dish nest mill.
The wind speed of preferred scheme, the wind turbine is 5-50m/s.Further preferred, the wind speed of the wind turbine is 10-
20m/s。
In the present invention, wind turbine is run simultaneously with dish nest mill, completes the solid powder particle of cladding in blower negative pressure exhausting
Under the conditions of, it is continual to be collected cause trap, realize continuous production.
Compared with prior art, advantage of the invention is that:
The present invention grinds the high efficiency dispersion ability to solid powder particle material using dish nest, it is made to be moved in fixed space
State dispersion suspends, and carries the temperature of a bit.At this point, cladding feed liquid enters this fixed space, Ke Yichong in the form of droplet
Divide and is effectively in contact with solid powder particle material surface, and the temperature on solid powder material surface can make cladding solvent in temperature
It quickly volatilizees under the action of degree and high wind, generates solid-state covering material particle, be uniformly deposited on encapsulated material particle surface,
Obtain the clad of even particle size distribution.Since the cladding time is short (several seconds general), and solvent instant vaporization, solvent and cladding
The probability that matrix reacts substantially reduces.
The cladding that anode material for lithium-ion batteries is realized using dish nest mill that the present invention initiates, the present invention is according to stratiform mistake
The property of metal-lithium ion cell positive material and covering material is crossed, a large amount of creative experiments have been carried out, finally in the present invention
It is set, dish nest grind out temperature, engine speed, air velocity, anode material for lithium-ion batteries and covering material into
Under the synergistic effect for expecting ratio, the anode material for lithium-ion batteries with uniform, controllable clad is obtained.Gained lithium of the invention from
The performance of sub- cell positive material especially cycle performance significantly improves.
Inventor has found that present invention process coats basis material particularly suitable for aqueous solution or hydrosol system.
The present invention can greatly improve covered effect and coating efficiency, and technical process simply has continuous production energy
Power, it is easily controllable, it is environmental-friendly.Also there is the present invention mass to prepare properties of product stabilization, and the big feature of yield has great
Industrialization meaning.
Description of the drawings
Fig. 1 is the nanometer Al that embodiment 1 obtains2O3Coat LiNi0.6Co0.2Mn0.2O2Composite material TEM figure.
Fig. 2 is that the nano-MgO that embodiment 2 obtains coats LiMn2O4Composite material TEM figure.
Fig. 3 is the nano-TiO that embodiment 3 obtains2Coat LiCoO2Composite material TEM figure.
Fig. 4 is the nanometer Al that comparative example 1 obtains2O3Coat LiNi0.6Co0.2Mn0.2O2Composite material TEM figure.
Fig. 5 the device of the invention schematic diagrames,
In figure, 1, grinding storehouse;2, mixing bunker;3, feed inlet;4, discharge port (being connected to trap);5, main spindle's;6, electric
Machine;7, engine base.
Fig. 6 is the nanometer Al that embodiment 1 obtains2O3Coat LiNi0.6Co0.2Mn0.2O2Composite material cycle performance figure.
Fig. 7 is that the nano-MgO that embodiment 2 obtains coats LiMn2O4Composite material cycle performance figure.
Fig. 8 is the nano-TiO that embodiment 3 obtains2Coat LiCoO2Composite material cycle performance figure.
Fig. 9 is the nanometer Al that comparative example 1 obtains2O3Coat LiNi0.6Co0.2Mn0.2O2Composite material cycle performance figure.
Figure 10 is the TEM figures for the cladding product that comparative example 2 obtains.
Figure 11 is the TEM figures for the cladding product that comparative example 3 obtains.
Figure 12 is the TEM figures for the cladding product that comparative example 4 obtains.
Figure 13 is the TEM figures for the cladding product that comparative example 5 obtains.
Specific implementation mode
Following embodiment is intended to illustrate invention rather than limitation of the invention further.
Embodiment 1
Prepare LiNi0.6Co0.2Mn0.2O2(NCM622) 0.2wt%Al is coated2O3Sample.10% Aluminum sol is dissolved in
In deionized water, compound concentration 2wt%Al2O3Aluminum sol cladding solution.It opens dish nest mill to be preheated, makes inlet temperature
It it is 200 DEG C, outlet temperature is 100 DEG C, 2000 revs/min of engine speed, 4000 cubes ms/h of air mass flow;Then it presses
LiNi0.6Co0.2Mn0.2O2400 kgs/hour of solid powder charging rate, liquid feeding speed are 80 kgs/hour, and synchronizing will
Solid, liquid raw material inputs the mill reaction of dish nest;Reaction obtains the anode material for lithium-ion batteries containing clad.The lithium of gained clad from
Sub- cell positive material is persistently delivered to trap under wind turbine draft effect, is finally collected by trap and obtains cladding product.
The wind turbine wind speed is 20 meter per seconds.
It is cladding Al from Fig. 12O3NCM622 samples transmission electron microscope picture, it can be seen that NCM622 particulate samples surface connect
Continue and uniformly covers the nano-scale particle that a layer thickness is 10~20nm.Fig. 6 is that sample prepared by embodiment 1 is used as anode
Material, the cycle performance figure for the button half-cell being assembled into, preceding is 0.2C charge and discharge three times, and 197 cycles are 1C charge and discharges later
Electricity, capacity retention ratio 81.2%.
Embodiment 2
Prepare LiMn2O4Coat the sample of 0.3%MgO.Magnesium acetate is dissolved in ethyl alcohol, the vinegar of a concentration of 5wt% is configured to
Sour magnesium cladding solution.It opens dish nest mill to be preheated, it is 250 DEG C to make inlet temperature, and outlet temperature is 80 DEG C, engine speed 1500
Rev/min, 3000 cubes ms/h of air mass flow;Then LiMn is pressed2O4200 kgs/hour of solid powder charging rate, liquid
Charging rate is 20 kgs/hour, synchronous by the input dish nest mill reaction of solid, liquid raw material;Reaction obtains the lithium ion containing clad
Cell positive material.The anode material for lithium-ion batteries of gained clad is persistently delivered to trap under wind turbine draft effect,
It is finally collected by trap and obtains cladding product.The wind turbine wind speed is 10 meter per seconds.
Fig. 2 is the LiMn for coating MgO2O4The transmission electron microscope picture of sample, it can be seen that LiMn2O4Particulate samples surface is continuous
And it is 20~40nm nano-scale particles uniformly to cover a layer thickness.Sample prepared by Fig. 7 embodiments 2 as positive electrode,
For the button half-cell being assembled into the cycle performance figure of 0.2C charge and discharge, 200 capacity retention ratios are 91.9%.
Embodiment 3
Prepare LiCoO2Coat 0.8%TiO2Sample.Using titanium colloidal sol as cladding source, deionized water is added to be diluted to a concentration of
5% titanium-oxide-coated solution.It opens dish nest mill to be preheated, it is 300 DEG C to make inlet temperature, and outlet temperature is 120 DEG C, host
2400 revs/min of rotating speed, 4000 cubes ms/h of air mass flow;Then LiCoO is pressed2500 kilograms of solid powder charging rate/
Hour, liquid feeding speed is 80 kgs/hour, synchronous by the input dish nest mill reaction of solid, liquid raw material;Obtain the lithium containing clad
Ion battery positive electrode.The anode material for lithium-ion batteries of gained clad is persistently delivered to and catches under wind turbine draft effect
Storage is finally collected by trap and obtains cladding product.The wind turbine wind speed is 10 meter per seconds.
Fig. 3 is cladding TiO2LiCoO2The transmission electron microscope picture of sample, it can be seen that LiCoO2Particulate samples surface it is continuous and
It is uniform to cover the nano-scale particle that a layer thickness is 80~100nm.Sample prepared by Fig. 8 embodiments 3 as positive electrode,
For the button half-cell being assembled into the cycle performance figure of 1C charge and discharge, 50 capacity retention ratios are 95.9%.
Comparative example 1
Other conditions are same as Example 1, only change engine speed, it is made to be reduced to 1000 revs/min from 2000 revs/min
As a result the covered effect of material is bad, the Al of dispersion occurs2O3Particle (see Fig. 4).Fig. 9 is sample conduct prepared by comparative example 1
Positive electrode, the cycle performance figure for the button half-cell being assembled into, preceding is 0.2C charge and discharge twice, and 198 cycles are 1C later
Charge and discharge, capacity retention ratio 68.1%.
Comparative example 2
Other conditions are same as Example 1, only change inlet temperature, so that it is increased to 450 DEG C from 200 DEG C, as a result material
Covered effect it is bad, encapsulated nanoparticles only disperse sparse, and most of ternary material material granule surface is not coated
(see Figure 10).
Comparative example 3
Other conditions are same as Example 1, only change outlet temperature, it is made to be reduced to 70 DEG C from 100 DEG C, as a result the packet of material
It covers ineffective, does not see Al in most of ternary material particle surface2O3Particle (see Figure 11).
Comparative example 4
Other conditions are same as Example 2, only change air mass flow, it is made to be reduced to 2000 cubes from 3000 cubes ms/h
M/h, as a result the covered effect of material is bad, most of lithium manganate material particle surface do not obtain it is good cladding (see
Figure 12).
Comparative example 5
Other conditions are same as Example 3, only change the charging rate of solid liquid phase substance, LiCoO2Solid powder charging rate
100 kgs/hour are changed to, liquid feeding speed is 16 kgs/hour, and as a result the covered effect of material is bad, part cobalt acid lithium
There is coating agglomeration in material granule surface (see Figure 13).
Claims (10)
1. a kind of method for coating of anode material for lithium-ion batteries, it is characterised in that:The anode material for lithium-ion batteries uses
Dish nest mill is coated;First dish nest mill is preheated, it is 100-400 DEG C to make dish nest mill inlet temperature, and discharge port temperature is
80-120 DEG C, and it is 1050-2500r/min, air mass flow 2050-6000m to control engine speed3/h;Then by lithium ion
In cell positive material powder input dish nest mill synchronous with the solution containing covering material, reaction obtains the lithium-ion electric containing clad
Pond positive electrode.
2. a kind of method for coating of anode material for lithium-ion batteries according to claim 1, it is characterised in that:The lithium from
Sub- cell positive material is stratiform transition metal anode material for lithium-ion batteries.
3. a kind of method for coating of anode material for lithium-ion batteries according to claim 1, it is characterised in that:The lithium from
Sub- cell positive material is selected from LiCoO2、LiCoO2Doped derivatives, LiMn2O4、LiMn2O4Doped derivatives, Li1+ aNixCoyMnzO2(-0.1<a<0.1,0<x<1,0<y<1,0<z<1,0.8<x+y+z<1.2)、Li1+aNixCoyMnzO2(-0.1<a<
0.1,0<x<1,0<y<1,0<z<1,0.8<x+y+z<1.2) doped derivatives, Li1+aNixCoyAlzO2(-0.1<a<0.1,0<x<
1,0<y<1,0<z<1,0.8<x+y+z<1.2)、Li1+aNixCoyAlzO2(-0.1<a<0.1,0<x<1,0<y<1,0<z<1,0.8<
x+y+z<1.2) doped derivatives, mLi2MnO3-(1-m)Li1+aNixCoyMnzO2(0<m<1,0<n<1,-0.1<a<0.1,0<x<
1,0<y<1,0<z<1,0.8<x+y+z<1.2)、mLi2MnO3-(1-m)Li1+aNixCoyMnzO2(0<m<1,0<n<1,-0.1<a<
0.1,0<x<1,0<y<1,0<z<1,0.8<x+y+z<1.2) at least one of doped derivatives.
4. a kind of method for coating of anode material for lithium-ion batteries according to claim 1, it is characterised in that:The cladding
Material is the substance or metal salt of containing metal oxide, and the metal salt is decomposed into metal oxide through 100~600 DEG C.
5. a kind of method for coating of anode material for lithium-ion batteries according to claim 1, it is characterised in that:It is described to contain packet
The solvent covered in the solution of material is selected from water or organic solvent;The solution containing covering material inputs dish nest in the form of spraying
Mill.
6. a kind of method for coating of anode material for lithium-ion batteries according to claim 1, it is characterised in that:First to dish nest
Mill is preheated, and it is 200-350 DEG C to make dish nest mill inlet temperature;And it is 1200-2400r/min, air to control engine speed
Flow 2500-5000m3/h。
7. a kind of method for coating of anode material for lithium-ion batteries according to claim 1, it is characterised in that:The lithium from
The solid-liquid mass ratio of sub- cell positive material powder and the solution containing covering material is 5:1-50:1;The lithium ion cell positive
The charging rate of material powder is 100-500kg/h;The charging rate of the solution containing covering material is 10-100kg/h.
8. a kind of method for coating of anode material for lithium-ion batteries according to claim 1, it is characterised in that:The cladding
The thickness of layer is 10~100nm.
9. a kind of method for coating of anode material for lithium-ion batteries according to claim 1, it is characterised in that:The dish nest
The discharge port of mill is connect with trap, wind turbine successively by pipeline, and the wind turbine is run simultaneously with dish nest mill, will be containing clad
Anode material for lithium-ion batteries continues to be delivered to trap by dish nest mill.
10. a kind of method for coating of anode material for lithium-ion batteries according to claim 9, it is characterised in that:The wind
The wind speed of machine is 5-50m/s.
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