CN106450286A - Nickel cobalt lithium manganate material and preparation method thereof - Google Patents
Nickel cobalt lithium manganate material and preparation method thereof Download PDFInfo
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- CN106450286A CN106450286A CN201611200917.1A CN201611200917A CN106450286A CN 106450286 A CN106450286 A CN 106450286A CN 201611200917 A CN201611200917 A CN 201611200917A CN 106450286 A CN106450286 A CN 106450286A
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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
- 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
- H01M4/52—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 relates to a preparation method of a nickel cobalt lithium manganate material. Soluble nickel, cobalt and manganese salts are used as raw materials; a coprecipitation reaction technology is used. The method is characterized in that the molecular formula of nickel cobalt lithium manganate is LiNixCoyMnzO2; the preparation comprises the following concrete process steps that (1) a nickel cobalt and manganese precursor is prepared through coprecipitation reaction; water is added into a reaction kettle device, so that nickel sulfate, cobalt sulfate and manganese sulfate are prepared into a mixed water solution; a sodium hydroxide water solution is added as a precipitant; ammonium hydroxide is added; the coprecipitation reaction is performed under the existence of heating and protection gas; filtering is performed to obtain filtrate and filter residue; the filter residue is cleaned to prepare a nickel cobalt and manganese hydroxide precursor; (2) reaction is performed to prepare a nickel cobalt lithium manganate product; the prepared nickel cobalt and manganese hydroxide precursor is baked and dried, and is then sieved to be fully stirred and mixed with lithium salts into a nickel cobalt and manganese hydroxide precursor and lithium salt mixture; the nickel cobalt and manganese hydroxide precursor and lithium salt mixture is loaded into an earthen bowl; high-temperature firing, crushing, sieving, mixing, sieving and iron removal are performed; packaging is performed to prepare the nickel cobalt lithium manganate material. A lithium ion battery manufactured by the prepared nickel cobalt lithium manganate product has the advantages of excellent safety performance, high-temperature performance and long cycle life.
Description
Technical field
The present invention relates to a kind of preparation method of anode material for lithium-ion batteries, particularly a kind of nickel-cobalt lithium manganate material and its system
Preparation Method.
Background technology
As a kind of battery of novel green, its extensive employing wireless communicates lithium ion battery, transportation, and Aero-Space etc. are each
Individual aspect, lithium ion battery mainly by the transition metal oxide of for example embedding lithium of positive electrode, negative material as high-graphitized
Carbon, barrier film such as microporous polyolefin film and electrolyte etc. form.And lithium ion anode material is restriction lithium ion battery each side
The vital factor of face performance.
, as one of critical material in lithium ion battery, its performance quality directly can shadow for anode material for lithium-ion batteries
Ring the performance of whole performance of lithium ion battery.Therefore, produced problem or lithium to be improved during lithium ion battery uses will be solved
During ion battery performance, research worker mainly can pay close attention to performance and the feature of lithium ion battery plus-negative plate material.Existing market
Upper lithium ion anode material is more, mainly has cobalt acid lithium, LiMn2O4 and LiFePO4.And the nickel cobalt manganese as tertiary cathode material
Sour lithium with its excellent performance, and super quality and competitive price etc. show one's talent in the positive electrode of various lithium batteries, be used widely.
Chinese patent notification number be a kind of anode material lithium nickle cobalt manganic acid of lithium ion battery disclosed in CN103296270A and
Preparation method, it is by the nickel in sulfate, cobalt, manganese by mole joining for 1:1：Then and sodium hydroxide 1 is configured to mixed aqueous solution,
And ammonia is reacted in reaction unit, it is injected simultaneously into nitrogen and water hydrazine, aged, filter, washing, dry and hydroxide is obtained
Nickel cobalt manganese product is obtained spherical nickel-cobalt mangaic acid lithium with lithium carbonate mixed sintering.
But said method presence addition compound is more, and reaction process step is long, and simultaneous reactions process is unable to automatization
Control.Artificial operation high labor intensive, and course of reaction is wayward.How to prepare reliable in quality, tertiary cathode material
The excellent performance of nickle cobalt lithium manganate is the nickel-cobalt lithium manganate material of differentiation, preparation technology whole-process automatic control, and prepare
Nickle cobalt lithium manganate properties of product are stable.
On the other hand, the sintering procedure of nickle cobalt lithium manganate is the chemical reaction process under an oxidizing atmosphere, sintering procedure
In how to control oxygen concentration be oxygen atmosphere, so that reaction is sufficiently carried out, be to prepare high-quality nickle cobalt lithium manganate material
One of key factor of material, the particularly high nickel-cobalt lithium manganate material of nickel content, the requirement to oxygen atmosphere is higher.
Content of the invention
The present invention seeks to provide a kind of nickel-cobalt lithium manganate material and preparation method thereof, is former with soluble nickel, cobalt, mn sulphate
Material, is obtained hydroxide nickel cobalt manganese presoma using coprecipitation reaction, after mixing with lithium carbonate, by optimizing the oxygen of sintering procedure
Activating QI atmosphere, is fired in roller kilns, prepares high-quality nickel-cobalt lithium manganate material product.
A kind of preparation method of nickel-cobalt lithium manganate material of the present invention, with soluble nickel, cobalt, manganese salt as raw material, using coprecipitated
Shallow lake reaction process, the molecular formula of its described nickle cobalt lithium manganate is LiNixCoyMnzO2, wherein x+y+z=1;
The concrete technology step of its preparation is as follows,
1）Coprecipitation reaction nickel cobalt manganese presoma, in reaction kettle device, adds water respectively by nickel sulfate, cobaltous sulfate, manganese sulfate
Make mixed aqueous solution, add sodium hydrate aqueous solution to make precipitant, add ammonia, under heating and protective gas existence condition
Carry out coprecipitation reaction, filter to get filtrate and filtering residue, filtering residue cleans, prepared hydroxide nickel cobalt manganese presoma；Nickel as needed
Nickel sulfate in cobalt manganese ratio control mixed aqueous solution, cobaltous sulfate, the stoichiometric proportion of manganese sulfate；The control response time is 12-
20 hours, reaction temperature was 40-85 DEG C, controlled ammonia concn in course of reaction to be 0.75-0.95mol/l, reaction solution simultaneously
PH is 10.5-12.5；
2）React nickle cobalt lithium manganate product processed, will preparation hydroxide nickel cobalt manganese presoma, drying drying, after sieving and lithium
Salt stirring is sufficiently mixed as hydroxide nickel cobalt manganese presoma and lithium salt mixture, by hydroxide nickel cobalt manganese presoma and lithium salts mixing
Thing fill alms bowl, high-temperature firing, crush, sieve, mixing, sieving, remove ferrum, be packaged as be obtained nickel-cobalt lithium manganate material；When control is fired
Between 20-36 hour, firing temperature be 600-1000 DEG C.
The present invention preferably described 2）Step hydroxide nickel cobalt manganese presoma and lithium salt mixture dress alms bowl, high-temperature firing, are controls
Make described mixture and carry out high-temperature firing under strong oxygen ambient conditions in baking apparatus；Described strong oxygen ambient conditions refer to
The mixture being loaded in alms bowl is set active oxygen-increasing device in baking apparatus under logical oxygen ambient conditions in mixture, by institute
The mixture stated active oxygen-increasing device and be loaded in alms bowl is together placed in baking apparatus under the conditions of carrying out high-temperature firing and discharges oxygen
Gas is the secondary oxygen supplement of mixture high-temperature firing, forms strong oxygen atmosphere.
Further, it is that described activity oxygen-increasing device includes active automatic aerator and the chemical enhancement in active automatic aerator
Agent, described chemical enhancement agent is peroxide salt and/or permanganate.
Further, be described activity oxygen-increasing device be high-temp-resistant micro crucible, described peroxide salt be sodium peroxide
And/or potassium peroxide and/or potassium permanganate.
Further, it is 1）Walk described filtering residue cleaning to be first rinsed using dilute alkaline aqueous solution, then deionized water is clear
The pH being washed till filtering residue is less than 8.5；Described dilute alkaline aqueous solution is the sodium hydrate aqueous solution of 0.15-0.35mol/l for concentration.
Preferably, be the preparation method of described nickle cobalt lithium manganate overall process, temperature and pH value control, high-temperature firing, baking
Drying is all using artificial intelligence control；Described high-temperature firing adopts roller kilns to sinter, and controls a length of 25-40 of roller-way of roller kilns
Rice.
Preferably, it is 2）Step is described to be crushed, sieves, dry packing be crushed using corundum roller pair breaking device after send into and shake
Dynamic sieved sieve, the nickle cobalt lithium manganate reaching granularity under sieve, then through far-infrared ray drying, further after removing absorption water, entrance is complete
Automatic vacuum packaging device bagging and packaging is and arrives nickle cobalt lithium manganate LiNixCoyMnzO2, wherein x+y+z=1 product；Thing on sieve
Material returns breaker using the square law device of air-flow conveying and again crushes；Described granularity is controlled to be 6-13 micron.
Preferably, it is described 1）Walk in reaction kettle device, before each material adds, in reaction kettle device, add bed material
Liquid, described addition bed material liquid accounts for the 20-25% of reaction kettle device effective volume, and the active ingredient simultaneously controlling described bed material liquid is
Ammonia and/or sodium hydroxide solution, control the ammonia in bed material liquid and concentration of sodium hydroxide solution to be 0.2-0.4 mol/l.
Further, it is 1）The concentration controlling sodium hydroxide solution is 6.5-7.5mol/l；Described addition ammonia concn be
10-30Wt%.
Nickel-cobalt lithium manganate material of the present invention prepares according to methods described above.
The inventive method processing step is as follows：Nickel cobalt manganese sulfate liquor preparation+aqueous slkali preparation → coprecipitation reaction →
Filter pressing cleaning → detection, drying → hydroxide nickel cobalt manganese presoma → mixing lithium salts → pressure alms bowl（Oxygen is provided in dress alms bowl material
Source）→ fire → crush → pulverize → sieve → mix → sieve → remove ferrum → packaging nickle cobalt lithium manganate product.
(stoichiometric proportion of nickel cobalt manganese is 5 to the nickle cobalt lithium manganate of the inventive method preparation:2:3, chemical formula is
LiNi0.5Co0.2Mn0.3O2) product detects through relevant departments, all technical is shown in Table 1 as follows, storage, traffic condition, shady and cool,
Dry, moistureproof, damp proof.
Table 1
Illustrate, the nickle cobalt lithium manganate product of present invention preparation makes lithium ion battery, has excellent security performance, high-temperature behavior
And long circulation life.
Brief description：
Fig. 1, is a kind of nickel-cobalt lithium manganate material LiNi using the inventive method preparation0.5Co0.2Mn0.3O2Granularity Distribution
Figure；
Fig. 2, is a kind of nickel-cobalt lithium manganate material LiNi using the inventive method preparation0.5Co0.2Mn0.3O2Product SEM schemes；
Fig. 3, is a kind of nickle cobalt lithium manganate LiNi using the inventive method preparation0.5Co0.2Mn0.3O2Product XRD figure.
Specific embodiment：With reference to specific embodiment the present invention is described in further detail it should be understood that this
Invention foregoing general description and specific embodiment below are exemplary and explanat, for claimed invention
Further explanation is provided.Stoichiometric proportion described in the present embodiment is quality mol ratio.
Mixture described in embodiment 1 the present embodiment is also the mixture of hydroxide nickel cobalt manganese and lithium carbonate, will mix
Thing is contained in saggar and fills in alms bowl, is in alms bowl, similarly hereinafter in saggar.
The present embodiment 1 is to prepare a kind of nickel-cobalt lithium manganate material, the nickel cobalt manganese chemistry meter of this material using the inventive method
Amount ratio is 8:1:1, chemical formula is LiNi0.8Co0.1Mn0.1O2, with soluble nickel, cobalt, manganese salt as raw material, its concrete technology step
As follows, 1）Coprecipitated reaction precursor of nickel-cobalt-lithium-manganese-oxide processed, with soluble nickel, cobalt sulfate and manganese chloride as raw material, adds water respectively
Make the mixed aqueous solution of nickel, cobalt, manganese salt, add sodium hydrate aqueous solution to make precipitant, chelating agent is made with ammonia, in heating and
Carry out coprecipitated reaction under alkali existence condition, filter to get filtrate and filtering residue, before the once purged drying of filtering residue is obtained hydroxide nickel cobalt manganese
Drive body；The nickel in mixed aqueous solution, cobalt, the mol ratio of manganese is controlled to be 8：1：1, total concentration is 2.0mol/L, controls the response time
For 20 hours, reaction temperature was 50 DEG C, reaction solution pH is 11.0.
2）Hydroxide nickel cobalt manganese presoma by preparation（Ni0.8Co0.1Mn0.1(OH)2）It is sufficiently mixed with lithium carbonate, hydrogen-oxygen
Change nickel cobalt manganese and lithium carbonate mixture is contained in saggar and fills in alms bowl, carry out high-temperature firing under strong oxygen ambient conditions, that is, exist
Insert miniature crucible in the mixture of hydroxide nickel cobalt manganese and lithium carbonate, in miniature crucible, put into sodium peroxide, install above thing
The saggar of material is put into and is carried out high-temperature firing in stove.Product after firing is through crushing, pulverizing, sieve, mix, sieve, except ferrum, bag
Dress, obtains LiNi0.8Co0.1Mn0.1O2Material.Control 24 hours firing times, sintering temperature is 750 DEG C.Control described mixture
It is in stove, to carry out high-temperature firing in baking apparatus under strong oxygen ambient conditions；Described strong oxygen ambient conditions refer to be loaded on alms bowl
Interior mixture sets active oxygen-increasing device in baking apparatus under logical oxygen ambient conditions in mixture, and described activity is increased
Oxygen device and the mixture being loaded in bowl are together placed in baking apparatus and discharge oxygen under the conditions of carrying out high-temperature firing is mixed
The secondary oxygen supplement of compound high-temperature firing, forms strong oxygen atmosphere.
The strong oxygen atmosphere of so-called formation, refers to the chemistry in the active automatic aerator of the active oxygen-increasing device in mixture
Oxygenation agent such as sodium peroxide, raising the oxygen that discharges of sodium peroxide and being loaded on bowl with the firing temperature in baking apparatus
Interior mixture is fully contacted, and under the ambient conditions of logical oxygen, the oxygen concentration of reaction is increased, and is formed to mixture
Secondary oxygen supplement, makes the abundant reaction of hydroxide nickel cobalt manganese presoma and lithium carbonate prepare the high chemical property of nickel content excellent
The present invention nickel-cobalt lithium manganate material.
Needed raw material specification of the present invention is as follows, nickel sulfate, cobaltous sulfate, and manganese sulfate or manganese chloride, lithium carbonate are LITHIUM BATTERY；
Liquid caustic soda, technical grade, mass concentration 32%；Ammonia, technical grade, mass concentration is 20%.
Concrete technology step flow process is as follows：
（1）The raw material of coprecipitation reaction prepares
The reaction nickel sulfate of above-mentioned quality, cobaltous sulfate, manganese chloride raw material will be bought by market, send into raw material storage storage, on demand
Measure and be conveyed into the nickel sulfate in raw material workshop, cobaltous sulfate respectively, in manganese chloride feed bin reaction unit, weighed with electronics decrement, press
Mass ratio allocates the dissolving of the dissolving tank amount of reordering pure water into, sends into intermediate storage tank.Raw material liquid caustic soda sends into raw material storage after being bought by market
Storage, allocates the dissolving tank amount of reordering pure water in proportion with electronic measuring balance, sends into intermediate storage tank standby.Ammonia is bought by market,
Send into ammonia water tank storage.Ammonia is configured to the ammonia of normal concentration by needed amount, sends into intermediate storage tank standby.
（2）Prepared by hydroxide nickel cobalt manganese precursor
Respectively setting flow is pressed by computer DCS control system and each reactant is flowed in each coprecipitated reaction kettle device, coprecipitated anti-
Should complete in the reactor that several are connected in series, each reactor is all fixed by computer DCS control system by technological requirement
Amount feeds nickel, cobalt, manganese mixed solution and ammonia.The concentration simultaneously controlling sodium hydroxide solution is 6.5-7.5mol/l；Described plus
Entering ammonia concn is 10Wt%.
The pH meter equipped with continuous detecting in each reactor, computer is carried out with the pH value setting according to the pH value of detection
Contrast, accurately passes through the specified rate of mass flow controller adjust automatically sodium hydroxide solution using artificial intelligence control algorithm,
Reaction is made to carry out the synthesis quality it is ensured that precursor in the pH value range setting all the time.By coprecipitated reactor out coprecipitated
Shallow lake reaction slurry, through over cleaning, removes foreign ion, is first carried out with dilute alkaline aqueous solution, is then washed with clear water during cleaning,
The pH of control material is less than 8.5.The slip having washed, sends in dryer device and is dried, and controls baking temperature more than 95 DEG C,
Generally 95-100 DEG C, 15-20 hour is dried it is ensured that the water of crystallization in precursor does not decompose..Scrub raffinate sends into sewage disposal
Stand, sloughed using ammonia still process method and after ammonia nitrogen ion, send into sewage treatment plant's process rear outer row up to standard.
（3）Nickle cobalt lithium manganate LiNi0.8Co0.1Mn0.1O2Finished products synthesize
Upper step is dried to the hydroxide nickel cobalt manganese precursor of regulation requirement and above-mentioned lithium carbonate is respectively fed to workshop
In presoma and lithium carbonate device, the mass ratio of control precursor of nickel-cobalt-lithium-manganese-oxide and lithium carbonate is 1：1.05-1.1.By electricity
Sub- decrement is sent in mixing device after claiming accurate dosing, fills alms bowl after abundant mixing.Control in each alms bowl equipped with mixture uniformly
If being provided with dry active oxygen-increasing device, it is provided with and required high-temperature firing in each active automatic aerator constituting active oxygen-increasing device
Mixture requisite oxygen gas phase coupling some mass parts chemical enhancement agent, described activity automatic aerator be miniature crucible, described
Chemical enhancement agent is sodium peroxide.
Will the mixture of hydroxide nickel cobalt manganese and lithium carbonate be contained in alms bowl, in the mixing of hydroxide nickel cobalt manganese and lithium carbonate
Insert miniature crucible in thing, control crucible height 45mm, diameter 15mm, be uniformly distributed in each alms bowl and be provided with 4-6 only miniature crucible,
It is provided with 3-5 gram of sodium peroxide in each miniature crucible.The saggar installing above material fills alms bowl and puts into and carries out high-temperature firing in stove.
It is then fed in roller kilns carrying out high-temperature firing, maximum temperature section is 750 DEG C.By the positive electrode that roller kilns are fired it is
LiNi0.8Co0.1Mn0.1O2Nickle cobalt lithium manganate, sends into pulverizer after corundum roller pair breaking crusher machine and pulverizes, then be sieved through through vibration
Sieve, reaches LiNi under the sieve of granularity 6-13 micron requirement0.8Co0.1Mn0.1O2Nickle cobalt lithium manganate, material is blended again, sieve, remove
Ferrum, packaging obtain LiNi0.8Co0.1Mn0.1O2Nickle cobalt lithium manganate product.Product is sent into product library and is deposited export trade.
Due to, in sintering procedure, making there is sufficient oxygen atmosphere during material reaction using the inventive method,
Ni0.8Co0.1Mn0.1(OH)2And Li2CO3Can fully be reacted, in material+trivalent nickel ion also can stable existence, also have
Control to effect the residual lithium in surface of material, final products can give play to excellent chemical property.
Embodiment 2
The product LiNi of the present embodiment 2 preparation0.5Co0.2Mn0.3O2For the such as table 1 of each performance it described, it prepares the molecule of product
Formula is nickel-cobalt lithium manganate material LiNi0.5Co0.2Mn0.3O2, the stoichiometric proportion controlling nickel cobalt manganese is 5:2:3, its preparation method with
Step is with enforcement 1.
Claims (8)
1. a kind of preparation method of nickel-cobalt lithium manganate material, with soluble nickel, cobalt, manganese salt as raw material, using coprecipitation reaction work
Skill, is characterized in that the molecular formula of described nickle cobalt lithium manganate is LiNixCoyMnzO2, wherein x+y+z=1;
The concrete technology step of its preparation is as follows,
1）Coprecipitation reaction nickel cobalt manganese presoma, in reaction kettle device, adds water respectively by nickel sulfate, cobaltous sulfate, manganese sulfate
Make mixed aqueous solution, add sodium hydrate aqueous solution to make precipitant, add ammonia, under heating and protective gas existence condition
Carry out coprecipitation reaction, filter to get filtrate and filtering residue, filtering residue cleans, prepared hydroxide nickel cobalt manganese presoma；Nickel as needed
Nickel sulfate in cobalt manganese ratio control mixed aqueous solution, cobaltous sulfate, the stoichiometric proportion of manganese sulfate；The control response time is 12-
20 hours, reaction temperature was 40-85 DEG C, controlled ammonia concn in course of reaction to be 0.75-0.95mol/l, reaction solution simultaneously
PH is 10.5-12.5；
2）React nickle cobalt lithium manganate product processed, will preparation hydroxide nickel cobalt manganese presoma, drying drying, after sieving and lithium
Salt stirring is sufficiently mixed as hydroxide nickel cobalt manganese presoma and lithium salt mixture, by hydroxide nickel cobalt manganese presoma and lithium salts mixing
Thing fill alms bowl, high-temperature firing, crush, sieve, mixing, sieving, remove ferrum, packaging be obtained nickel-cobalt lithium manganate material；Control the firing time
20-36 hour, firing temperature is 600-1000 DEG C.
2. a kind of preparation method of nickel-cobalt lithium manganate material according to claim 1, is characterized in that described 2）Step hydroxide
Nickel cobalt manganese presoma and lithium salt mixture dress alms bowl, high-temperature firing, are to control described mixture in burning under strong oxygen ambient conditions
Carry out high-temperature firing in device processed；Described strong oxygen ambient conditions refer to by the mixture being loaded in alms bowl in baking apparatus in logical
Active oxygen-increasing device is set in mixture, by described activity oxygen-increasing device and the mixture one being loaded in alms bowl under oxygen ambient conditions
Being placed in baking apparatus together under the conditions of carrying out high-temperature firing and discharging oxygen is the secondary oxygen supplement of mixture high-temperature firing, forms strong oxygen
Atmosphere is enclosed.
3. the preparation method of a kind of nickel-cobalt lithium manganate material according to claim 2, active oxygen-increasing device described in its feature
Including active automatic aerator and the chemical enhancement agent in active automatic aerator, described chemical enhancement agent is peroxide salt and/or height
Manganate.
4. the preparation method of a kind of nickel-cobalt lithium manganate material according to claim 3, described in its feature, activity automatic aerator is
High-temp-resistant micro crucible, described peroxide salt is sodium peroxide and/or potassium peroxide and/or potassium permanganate.
5. a kind of preparation method of nickel-cobalt lithium manganate material according to claim 1, is characterized in that 1）Described filtering residue cleaning
First it is rinsed using dilute alkaline aqueous solution, then deionized water is cleaned and is less than 8.5 to the pH of filtering residue；Described dilute alkaline aqueous solution is
Concentration is the sodium hydrate aqueous solution of 0.15-0.35mol/l.
6. a kind of preparation method of nickel-cobalt lithium manganate material according to claim 1, is characterized in that described nickle cobalt lithium manganate
Preparation method overall process, temperature and pH value control, high-temperature firing, dry and be dried all using artificial intelligence control；Described height
Temperature is fired using roller kilns sintering, controls roller-way a length of 25-40 rice of roller kilns.
7. a kind of preparation method of nickel-cobalt lithium manganate material according to claim 1, is characterized in that 2）The described broken, mistake of step
Sieve, dry packing be using corundum roller pair breaking device crush after send into vibrosieve sieve, sieve under the nickel cobalt manganese reaching granularity
Sour lithium, then through far-infrared ray drying, further after removing absorption water, enter fully automatic vacuum packing device bagging and packaging and be nickel
Cobalt manganic acid lithium LiNixCoyMnzO2, wherein x+y+z=1 product；It is broken that material on sieve adopts the square law device of air-flow conveying to return
Device crushes again；Described granularity is controlled to be 6-13 micron.
8. a kind of nickel-cobalt lithium manganate material method according to claim 1 prepares.
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| CN107799762A (en) * | 2017-09-28 | 2018-03-13 | 华南理工大学 | A kind of preparation method for improving the lithium ion battery nickel-cobalt-manganternary ternary anode material of discharging efficiency first |
| CN107799741A (en) * | 2017-09-28 | 2018-03-13 | 华南理工大学 | A kind of preparation method of the lithium ion battery nickel-cobalt-manganese ternary positive electrode of modified zinc oxide |
| CN109888269A (en) * | 2018-12-29 | 2019-06-14 | 广东邦普循环科技有限公司 | A kind of pretreated method of ternary material mixing |
| CN112624212A (en) * | 2020-12-18 | 2021-04-09 | 江西汉尧富锂科技有限公司 | Carbon-doped nickel hydroxide cobalt manganese material and preparation method thereof |
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| CN103296270A (en) * | 2013-06-14 | 2013-09-11 | 江苏海四达电源股份有限公司 | Lithium-ion battery positive material lithium nickel manganese cobalt (LiNixCoyMnzO2) and preparation method thereof |
| CN104852038A (en) * | 2015-04-08 | 2015-08-19 | 中国科学院长春应用化学研究所 | Preparation method of high-capacity quickly-chargeable/dischargeable lithium ion battery ternary anode material |
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| CN107799741A (en) * | 2017-09-28 | 2018-03-13 | 华南理工大学 | A kind of preparation method of the lithium ion battery nickel-cobalt-manganese ternary positive electrode of modified zinc oxide |
| CN109888269A (en) * | 2018-12-29 | 2019-06-14 | 广东邦普循环科技有限公司 | A kind of pretreated method of ternary material mixing |
| CN112624212A (en) * | 2020-12-18 | 2021-04-09 | 江西汉尧富锂科技有限公司 | Carbon-doped nickel hydroxide cobalt manganese material and preparation method thereof |
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