CN103904319B - A kind of preparation method of power type nickel-cobalt lithium manganate cathode material - Google Patents

A kind of preparation method of power type nickel-cobalt lithium manganate cathode material Download PDF

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CN103904319B
CN103904319B CN201410076330.9A CN201410076330A CN103904319B CN 103904319 B CN103904319 B CN 103904319B CN 201410076330 A CN201410076330 A CN 201410076330A CN 103904319 B CN103904319 B CN 103904319B
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preparation
nickel
solution
shower nozzle
cobalt
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CN103904319A (en
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谢英豪
余海军
李长东
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Ningde Bangpu Recycling Technology Co.,Ltd.
Hunan Brunp Recycling Technology Co Ltd
Guangdong Brunp Recycling Technology Co Ltd
Hunan Bangpu Automobile Circulation Co Ltd
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HUNAN BRUNP SCRAP CARS RECYCLING Co Ltd
Hunan Brunp Recycling Technology Co Ltd
Guangdong Brunp Recycling Technology Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • H01M4/48Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/50Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
    • H01M4/505Selection 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
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G53/00Compounds of nickel
    • C01G53/40Nickelates
    • C01G53/42Nickelates containing alkali metals, e.g. LiNiO2
    • C01G53/44Nickelates containing alkali metals, e.g. LiNiO2 containing manganese
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • H01M4/48Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525Selection 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
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/01Particle morphology depicted by an image
    • C01P2004/03Particle morphology depicted by an image obtained by SEM
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/30Particle morphology extending in three dimensions
    • C01P2004/32Spheres
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/11Powder tap density
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention discloses a kind of preparation method of power type nickel-cobalt lithium manganate cathode material, first part lithium source and nickel, cobalt, manganese source are dissolved in organic solvent, again by water-soluble for another part lithium source, simultaneously by two shower nozzle pyrolysis oven granulation, and mix in stove, then high temperature sintering is carried out to mixed-powder, obtain nickel-cobalt lithium manganate cathode material.NH is not produced in this preparation process 4 +, Na +plasma, greatly reduces the pollution to environment, gained nickel-cobalt lithium manganate material good sphericity, distributed components, and tap density is high, have excellent cyclical stability, and first discharge specific capacity significantly improves in charge and discharge cycles process.

Description

A kind of preparation method of power type nickel-cobalt lithium manganate cathode material
Technical field
The invention belongs to cell positive material preparing technical field, particularly a kind of preparation method of power type nickel-cobalt lithium manganate cathode material.
Background technology
China's " energy-conservation with new-energy automobile industrial development planning (2012-2020) " electric automobile cumulative sale reached 500,000 by 2015, and the year two thousand twenty reaches 5,000,000.Under the guidance of national policy, electrokinetic cell industry obtains develop rapidly.Because of lithium ion battery, to have fail safe good, and electric discharge specific energy is high, and the advantages such as the discharge and recharge life-span is long, pollution-free be it is believed that it is one of the most promising electrokinetic cell.
Positive electrode directly determines the performance of lithium ion battery.Nickel-cobalt lithium manganate cathode material adopts relatively inexpensive nickel and manganese to instead of cobalts a large amount of in cobalt acid lithium, thus it has obviously advantage in reducing costs, simultaneously because of considerable charge/discharge capacity and excellent cyclical stability, the production of nickel-cobalt lithium manganate cathode material and use increasingly extensive, demonstrates huge market prospects.
The pattern of nickle cobalt lithium manganate self and the performance of size to electrical property play an important role.Research shows, sphere material particle can make material have larger tap density and useful life.In addition, excellent nickel-cobalt lithium manganate material must have suitable size and narrower particle size distribution, and is the bead of non-agglomerated.Routine prepares the coprecipitation of spherical nickel-cobalt LiMn2O4, owing to adopting the alkali lye such as ammoniacal liquor or NaOH to precipitate in technical process, and NH 4 +, Na +plasma easily pollutes water body and context.And coprecipitation causes being difficult to obtain stable and that stoichiometric proportion is fixing coprecipitate in same system because of the difference of the solubility product of nickel, cobalt, hydroxide that each element of manganese is corresponding.The conventional solid phase method adopted, need to pulverize material before sintering in its technical process, batch mixing, although and through long-time grinding before roasting, lithium salts, nickel salt and cobalt salt are all difficult to reach other even contact of molecular level, and poor its stable electrochemical property that causes of the uniformity of material is not high.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of preparation method of power type nickel-cobalt lithium manganate cathode material is provided.
The technical solution used in the present invention is:
A preparation method for power type nickel-cobalt lithium manganate cathode material, comprises the following steps:
(1) by lithium source, nickel source, cobalt source, manganese source Li:Ni:Co:Mn=x:y:z:(1-y-z in molar ratio) be dissolved in organic solvent, add appropriate viscosity-controlling agent, mix, obtain solution I; Wherein, 0.1≤x≤0.3,0.1≤y≤0.9,0.1≤z≤0.5, y+z<1;
(2) by water-soluble for the lithium source of (1.0 ~ 1.1)-x, add appropriate viscosity-controlling agent, mix, obtain solution II;
(3) the shower nozzle A, the solution II that solution I are passed through two shower nozzle pyrolysis oven carry out press atomization granulation by shower nozzle B simultaneously, obtain the mixed-powder in presoma and lithium source;
(4) mixed-powder that step (3) obtains is sintered 5 ~ 20h at 600 ~ 1000 DEG C of temperature, obtain nickel-cobalt lithium manganate cathode material.
Preferably, step (1) described organic solvent is the carbon number of molten condition is the straight-chain carboxylic acid of 12 ~ 18.
Preferably, in solution I, concentration of metal ions is 0.5 ~ 3mol/L.
Preferably, in solution II, lithium concentration is 1 ~ 5mol/L.
Preferably, step (1) described viscosity-controlling agent is at least one in triethylamine, glyoxal, glutaraldehyde, benzaldehyde, benzoic acid, isobutylaldehyde, cinnamic acid, cinnamic acid; Step (2) described viscosity-controlling agent is at least one in ethylene glycol, glycerol, triethanolamine, ethylenediamine, tetraethylene glycol, ethylenimine, acetamide, dibutyl ethers, isobutyl amine, 2-butanone, propylamine, 2-propyl alcohol.
Preferably, in solution I, the concentration of viscosity-controlling agent is 1 ~ 5 g/L.
Preferably, in solution II, the concentration of viscosity-controlling agent is 2 ~ 10g/L.
Preferably, in step (3), the operating pressure controlling shower nozzle A is 0.1 ~ 0.6MPa, and charging rate is 500 ~ 5000mL/h; The operating pressure controlling shower nozzle B is 0.05 ~ 0.3MPa, and charging rate is 300 ~ 2050mL/h.
Preferably, in step (3), controlling prilling temperature in pyrolysis oven stove is 400 ~ 600 DEG C.
Preferably, be divided into dryer section, pyrolysis section, burning zone, after-flame section and cooling section from top to bottom, blast hot-air in after-flame section in pyrolysis oven stove, make the obtained particle of step (3) be in tumbling state, particle is 1 ~ 5min at residing time in furnace.
Preferably, described lithium source is at least one in lithium acetate, lithium oxalate, lithium citrate, lithium hydroxide; Described nickel source is at least one in nickel acetate, nickel oxalate, citric acid nickel, nickel hydroxide; Described cobalt source is at least one in cobalt acetate, cobalt oxalate, citric acid cobalt, cobalt hydroxide; Described manganese source is at least one in manganese acetate, manganese oxalate, manganese citrate, manganous hydroxide.
The invention has the beneficial effects as follows:
1, the present invention adopts melting carboxylic acid as solvent, and carboxylic acid solvent has solvent, compounding ingredient, surfactant triple role concurrently simultaneously, makes the mixing that each metal ion species is uniform and stable in the liquid phase, and water also can be avoided the hydrolysis of slaine.The structures such as carboxylic acid solvent's molecule and intermolecular formation hydrogen bond association, make to be wound around point between molecule and increase, the intermolecular forces of molecule strengthens, and therefore, the nickle cobalt lithium manganate that sintering is obtained has larger tap density.
2, part lithium source mixes with nickel, cobalt, manganese source solution by the present invention, and each component mixes at atomic level, and lithium source will be evenly distributed in precursor solution; The precursor solution including lithium source sprays from the shower nozzle A of two shower nozzle pyrolysis oven, and another part lithium source solution sprays from shower nozzle B, mixes with it, obtain the Homogeneous phase mixing powder in presoma and lithium source under air-flow drives; High temperature sintering is carried out to mixed-powder, after organic solvent at high temperature burns, gives granular precursor loose structure, be conducive to the Li making molten lithium source 2o fully diffuses into presoma inside from hole, material composition is distributed more even.Lithium source is introduced in two steps, optimizes material composition distribution further, is more preferably measured and compare chemicals after sintering.
3, the present invention adopts two shower nozzle pyrolysis oven simultaneously to presoma and the granulation of lithium source, and the drive by air-flow in stove mixes, and the mixing method avoiding conventional ball mill may destroy the defect of the spherical porous structure of presoma.
4, do not adopt the alkali such as ammoniacal liquor or NaOH to precipitate in technical process of the present invention, do not produce NH in traditional handicraft 4 +, Na +plasma, to the pollution of water, greatly reduces the pollution to environment.Gained nickle cobalt lithium manganate product yield is high, good sphericity, and tap density is high, have excellent cyclical stability, and first discharge specific capacity significantly improves in charge and discharge cycles process.
Accompanying drawing explanation
Fig. 1 is the SEM figure of nickel-cobalt lithium manganate cathode material;
Fig. 2 is the charging and discharging curve figure of nickel-cobalt lithium manganate cathode material assembled battery;
Fig. 3 is the cycle performance figure of nickel-cobalt lithium manganate cathode material assembled battery.
Embodiment
Below in conjunction with specific embodiment, set forth content of the present invention further.
embodiment 1
A preparation method for power type nickle cobalt lithium manganate, comprises following concrete steps:
(1) lithium acetate, nickel acetate, four hydration cobalt acetates, manganese acetate being joined volume by quality 6.60g, 17.68g, 124.54g, 69.2g is respectively dissolve in the dodecylic acid of 50 DEG C of 2.2L, stir 2h mixing, then 2.2g triethylamine is added dropwise to while stirring, continue to stir 3h mixing, obtain solution I;
(2) 59.39g lithium acetate is dissolved in 0.9L water, adds 1.8g ethylene glycol, stir 1h mixing, obtain solution II;
(3) solution I is carried out press atomization granulation at the shower nozzle A of two shower nozzle pyrolysis oven, controlled pressure is 0.6MPa, and charging rate is 5000mL/h, simultaneously, solution II is carried out press atomization granulation at the shower nozzle B of two shower nozzle pyrolysis oven, and controlled pressure is 0.3MPa, and charging rate is 2050mL/h; The baffle plate that a block length is adjustable is had between shower nozzle A, B, dryer section, pyrolysis section, burning zone, after-flame section and cooling section is divided into from top to bottom in stove, blast hot-air in after-flame section, obtained particle is in tumbling state, and controls that prilling temperature in stove is 400 DEG C, particle stops 5min in stove; Granulation completes, and obtains presoma and lithium source mixed-powder;
(4) presoma step (3) obtained and lithium source mixed-powder are placed in Muffle furnace and sinter in atmosphere, and 600 DEG C of Isothermal sinter 20h, obtain power type nickel-cobalt lithium manganate cathode material.
embodiment 2
A preparation method for power type nickle cobalt lithium manganate, comprises following concrete steps:
(1) lithium acetate, nickel acetate, four hydration cobalt acetates, manganese acetate being joined volume by quality 6.60g, 17.68g, 124.54g, 69.2g is respectively dissolve in the tetracosandioic acid of 135 DEG C of 1.5L, stir 2h mixing, then 3.0g glyoxal is added dropwise to while stirring, continue to stir 3h mixing, obtain solution I;
(2) 59.39g lithium acetate is dissolved in 0.6L water, adds 2.0g glycerol, stir 1h mixing, obtain solution II;
(3) solution I is carried out press atomization granulation at the shower nozzle A of two shower nozzle pyrolysis oven, controlled pressure is 0.5MPa, and charging rate is 4000mL/h, simultaneously, solution II is carried out press atomization granulation at the shower nozzle B of two shower nozzle pyrolysis oven, and controlled pressure is 0.2MPa, and charging rate is 1600mL/h; The baffle plate that a block length is adjustable is had between shower nozzle A, B, dryer section, pyrolysis section, burning zone, after-flame section and cooling section is divided into from top to bottom in stove, blast hot-air in after-flame section, obtained particle is in tumbling state, and controls that prilling temperature in stove is 450 DEG C, particle stops 4min in stove; Granulation completes, and obtains presoma and lithium source mixed-powder;
(4) presoma step (3) obtained and lithium source mixed-powder are placed in Muffle furnace and sinter in atmosphere, and 700 DEG C of Isothermal sinter 15h, obtain power type nickel-cobalt lithium manganate cathode material.
embodiment 3
A preparation method for power type nickle cobalt lithium manganate, comprises following concrete steps:
(1) lithium oxalate, nickel oxalate, cobalt oxalate, manganese oxalate being joined volume by quality 19.19g, 48.90g, 48.97g, 47.65g is respectively dissolve in the hexadecanoic acid of 65 DEG C of 0.8L, stir 3h, then be added dropwise to 2.4g glutaraldehyde while stirring, continue to stir 2h, obtain solution I;
(2) 76.78g lithium oxalate is dissolved in 0.267L water, adds 1.33g triethanolamine, stir 2h mixing, obtain solution II;
(3) solution I is carried out press atomization granulation at the shower nozzle A of two shower nozzle pyrolysis oven, controlled pressure is 0.3MPa, and charging rate is 3000mL/h; Meanwhile, solution II is carried out press atomization granulation at the shower nozzle B of two shower nozzle pyrolysis oven, controlled pressure is 0.15MPa, and charging rate is 1000mL/h; Be divided into dryer section, pyrolysis section, burning zone, after-flame section and cooling section in stove from top to bottom, blast hot-air in after-flame section, obtained particle is in tumbling state, and controls that prilling temperature in stove is 500 DEG C, particle stops 3min in stove; Granulation completes, and obtains presoma and lithium source mixed-powder;
(4) presoma step (3) obtained and lithium source mixed-powder are placed in Muffle furnace and sinter in atmosphere, and 800 DEG C of sintering 10h, obtain power type nickel-cobalt lithium manganate cathode material.
embodiment 4
A preparation method for power type nickle cobalt lithium manganate, comprises following concrete steps:
(1) lithium hydroxide, nickel hydroxide, cobalt hydroxide, manganous hydroxide being joined volume by quality 7.18g, 74.17g, 9.29g, 8.89g is respectively dissolve in the hexadecandioic acid (hexadecane diacid) of 130 DEG C of 0.6L, stir 4h, then 2.5g benzaldehyde is added dropwise to while stirring, continue to stir 1h, obtain solution I;
(2) 76.78g lithium oxalate is dissolved in 0.3L water, adds 2.25g ethylenediamine, stir 2h mixing, obtain solution II;
(3) solution I is carried out press atomization granulation at the shower nozzle A of two shower nozzle pyrolysis oven, controlled pressure is 0.2MPa, and charging rate is 1500mL/h, simultaneously, solution II is carried out press atomization granulation at the shower nozzle B of two shower nozzle pyrolysis oven, and controlled pressure is 0.1MPa, and charging rate is 750mL/h; Be divided into dryer section, pyrolysis section, burning zone, after-flame section and cooling section in stove from top to bottom, blast hot-air in after-flame section, obtained particle is in tumbling state, and controls that prilling temperature in stove is 550 DEG C, particle stops 1min in stove; Granulation completes, and obtains presoma and lithium source mixed-powder;
(4) presoma step (3) obtained and lithium source mixed-powder are placed in Muffle furnace and sinter in atmosphere, and 900 DEG C of sintering 8h, obtain power type nickel-cobalt lithium manganate cathode material.
embodiment 5
A preparation method for power type nickle cobalt lithium manganate, comprises following concrete steps:
(1) lithium hydroxide, nickel hydroxide, cobalt hydroxide, manganous hydroxide being joined volume by quality 7.18g, 74.17g, 9.29g, 8.89g is respectively dissolve in the octadecanoid acid of 85 DEG C of 0.433L, stir 5h, then 2.17g benzoic acid is added dropwise to while stirring, continue to stir 1h, obtain solution I;
(2) 76.78g lithium oxalate is dissolved in 0.267L water, adds 1.34g tetraethylene glycol, stir 2h mixing, obtain solution II;
(3) solution I is carried out press atomization granulation at the shower nozzle A of two shower nozzle pyrolysis oven, controlled pressure is 0.1MPa, and charging rate is 500mL/h, simultaneously, solution II is carried out press atomization granulation at the shower nozzle B of two shower nozzle pyrolysis oven, and controlled pressure is 0.05MPa, and charging rate is 300mL/h; Be divided into dryer section, pyrolysis section, burning zone, after-flame section and cooling section in stove from top to bottom, blast hot-air in after-flame section, obtained particle is in tumbling state, and controls that prilling temperature in stove is 600 DEG C, particle stops 1min in stove; Granulation completes, and obtains presoma and lithium source mixed-powder;
(4) presoma step (3) obtained and lithium source mixed-powder are placed in Muffle furnace and sinter in atmosphere, and 1000 DEG C of sintering 5h, obtain power type nickel-cobalt lithium manganate cathode material.
comparative example
Take 65.99g lithium acetate respectively, 58.93g nickel acetate, 82.03g four hydration cobalt acetates, 57.67g manganese acetate, add 200mL absolute ethyl alcohol and make dispersant, with planetary ball mill ball milling 2h, the powder obtained is placed in Muffle furnace after drying and sinters in atmosphere by 105 DEG C, baking oven, sintering temperature is 600 DEG C, constant temperature 20h.Obtain nickle cobalt lithium manganate comparative sample.
performance Detection:
1, Fig. 1 is the SEM figure that embodiment 1 obtains nickel-cobalt lithium manganate cathode material, can find out, gained sample is spherical in rule, pattern rule, good dispersion, particle size consistency is good, and domain size distribution is between 6 ~ 12 μm, the bulk density of material can not only be improved, increase the volume energy density of battery, and significantly can improve the processing characteristics in slurry coating, electrode production process.The SEM figure of nickel-cobalt lithium manganate cathode material prepared by other embodiments and embodiment 1 are without bigger difference.
2, respectively with the obtained nickle cobalt lithium manganate of embodiment 3 and comparative example for positive pole, take lithium metal as negative pole, be assembled into battery, carry out discharge test first with 1C multiplying power, result is as shown in Figure 2.Result shows, and under 1C multiplying power, the first discharge specific capacity of nickel-cobalt lithium manganate cathode material prepared by embodiment 3 is than the height of common solid phase method, and the specific capacity of embodiment 3 is 151.9mAh/g, and the specific capacity of comparative example only has 136.2mAh/g.
100 charge and discharge cycles tests are carried out, as shown in Figure 3 with 1C multiplying power.Result shows, and the specific capacity of nickel-cobalt lithium manganate cathode material prepared by embodiment 3 is after 100 circulations, and than the height of common solid phase method, the capability retention of embodiment 3 is 90.7%, and the capability retention of comparative example only has 82.4%.

Claims (9)

1. a preparation method for power type nickel-cobalt lithium manganate cathode material, is characterized in that, comprises the following steps:
(1) by lithium source, nickel source, cobalt source, manganese source Li:Ni:Co:Mn=x:y:z:(1-y-z in molar ratio) be dissolved in organic solvent, add appropriate viscosity-controlling agent, mix, obtain solution I; Wherein, 0.1≤x≤0.3,0.1≤y≤0.9,0.1≤z≤0.5, y+z<1; Organic solvent is the carbon number of molten condition is the straight-chain carboxylic acid of 12 ~ 18;
(2) by water-soluble for the lithium source of (1.0 ~ 1.1)-x, add appropriate viscosity-controlling agent, mix, obtain solution II;
(3) the shower nozzle A, the solution II that solution I are passed through two shower nozzle pyrolysis oven carry out press atomization granulation by shower nozzle B simultaneously, obtain the mixed-powder in presoma and lithium source;
(4) mixed-powder that step (3) obtains is sintered 5 ~ 20h at 600 ~ 1000 DEG C of temperature, obtain nickel-cobalt lithium manganate cathode material.
2. preparation method according to claim 1, is characterized in that: in solution I, concentration of metal ions is 0.5 ~ 3mol/L.
3. preparation method according to claim 1, is characterized in that: in solution II, lithium concentration is 1 ~ 5mol/L.
4. preparation method according to claim 1, is characterized in that: step (1) described viscosity-controlling agent is at least one in triethylamine, glyoxal, glutaraldehyde, benzaldehyde, benzoic acid, isobutylaldehyde, cinnamic acid, cinnamic acid; Step (2) described viscosity-controlling agent is at least one in ethylene glycol, glycerol, triethanolamine, ethylenediamine, tetraethylene glycol, ethylenimine, acetamide, dibutyl ethers, isobutyl amine, 2-butanone, propylamine, 2-propyl alcohol.
5. the preparation method according to claim 1 or 4, is characterized in that: in solution I, the concentration of viscosity-controlling agent is 1 ~ 5g/L.
6. the preparation method according to claim 1 or 4, is characterized in that: in solution II, the concentration of viscosity-controlling agent is 2 ~ 10g/L.
7. preparation method according to claim 1, is characterized in that: in step (3), and the operating pressure controlling shower nozzle A is 0.1 ~ 0.6MPa, and charging rate is 500 ~ 5000mL/h; The operating pressure controlling shower nozzle B is 0.05 ~ 0.3MPa, and charging rate is 300 ~ 2050mL/h.
8. preparation method according to claim 1, is characterized in that: in step (3), and controlling prilling temperature in pyrolysis oven stove is 400 ~ 600 DEG C.
9. the preparation method according to claim 1,7 or 8, it is characterized in that: in pyrolysis oven stove, be divided into dryer section, pyrolysis section, burning zone, after-flame section and cooling section from top to bottom, hot-air is blasted in after-flame section, make the obtained particle of step (3) be in tumbling state, particle is 1 ~ 5min at residing time in furnace.
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CN113178565B (en) * 2021-03-29 2023-06-16 广东邦普循环科技有限公司 Mixing process for preparing high-nickel anode material and application thereof
CN113809319B (en) * 2021-08-03 2022-11-15 广东邦普循环科技有限公司 High-performance lithium nickel cobalt manganese oxide positive electrode material for power battery and preparation method of high-performance lithium nickel cobalt manganese oxide positive electrode material
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