CN105390691A - Method for preparing spherical nickel cobalt lithium manganate by liquid phase template method - Google Patents
Method for preparing spherical nickel cobalt lithium manganate by liquid phase template method Download PDFInfo
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- CN105390691A CN105390691A CN201510698348.7A CN201510698348A CN105390691A CN 105390691 A CN105390691 A CN 105390691A CN 201510698348 A CN201510698348 A CN 201510698348A CN 105390691 A CN105390691 A CN 105390691A
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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
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- Battery Electrode And Active Subsutance (AREA)
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Abstract
The invention relates to the manufacturing field of lithium battery energy, provides a method for preparing spherical nickel cobalt lithium manganate by a liquid phase template method, and aims to overcome the shortcomings of difficulty in controlling grain diameter of materials, low product capacity, low energy density and the like in the existing preparation method for the cobalt lithium manganate battery material. The method is improved on the basis of a method of precipitation; nickel cobalt manganese and other elements are deposited by adding a wafer spherical template; a control condition is added specific to a crystal nucleation substrate, so that the grain diameter of the material can be effectively regulated and controlled; therefore, the problems existing in the control of battery material granularity distribution, unstable product performance and the like in the prior art are solved; the template used in the method can be used as the crystal nucleus; by influencing the diffusion velocity of the nickel ions, cobalt ions and manganese ions, the crystal growth speed and crystal size can be controlled; and therefore, the regulation and control on the property and the performance of the synthetic material are facilitated, and the used liquid phase template is universal, economical and effective.
Description
Technical field
The present invention relates to lithium electric energy and manufacture field, particularly a kind of spherical nickel-cobalt LiMn2O4.
Background technology
Along with the development of communications industry, ev industry and digital product industry, the demand of people to battery increases day by day, and power, energy-storage battery arise at the historic moment.
The negative material of lithium ion battery is graphite type material always, and tin compound and silicon compounds negative material still there is no large progress; But positive electrode is from the degree show of cobalt acid lithium material, to the development trend that cobalt acid lithium, LiMn2O4, lithium nickel cobalt dioxide, nickle cobalt lithium manganate, ferrophosphorus acid lithium material are advanced side by side.
Cobalt acid lithium material, as the commercial anode material for lithium-ion batteries of the first generation, also has many advantages do not replaced: drawing abillity is fine, and density is high, the voltage platform of material is higher and more stable, be the most ripe positive electrode, at short notice, also have certain advantage.But its expensive, capacity existed almost has performed to the defects such as the limit, resource scarcity, poor stability makes it to suffer to be substituted destiny in 5 to 10 years.
Lithium manganate material is the positive electrode studied except cobalt acid lithium the earliest, and by years of researches, the performance of material obtains larger improvement.Its higher fail safe, cheap price, makes it have broad application prospects in electrokinetic cell field; But its lower specific capacity, poor cycle performance, particularly high temperature cyclic performance makes its application receive larger restriction, although logical research in a few years, cycle performance is improved, but high temperature cyclic performance is not also solved preferably, the paces of its large-scale commercial are postponed.
LiFePO 4 material is the positive electrode that fast development is got up, its cheap price, higher security performance, good structural stability, superior cycle performance makes it have broad application prospects as electrokinetic cell and stand-by power supply field, has greatly the trend replacing LiMn2O4.But it also exists the problem that some difficulty or ease solve, and special tap density is low, and volume and capacity ratio is low, and conductivity is low, and low temperature performance is poor, the problems such as multiplying power discharging difference need continue research and improve.
Most possible replacement cobalt acid lithium be lithium nickel cobalt dioxide and nickel cobalt mangaic acid ternary material, be the fast development along with new energy field, it is also more and more higher to the requirement of battery capacity, must promote the nickel cobalt class material of high power capacity and the development of nickel-cobalt-manganese ternary material.Lithium nickel cobalt dioxide material is the material that a kind of Capacity Ratio is higher, and its specific capacity exceeds more than 30% than the sour lithium of cobalt, and and cobalt acid lithium have identical bound voltage, utilize than being easier to scale, price is relatively cheap.
Current nickel-cobalt-manganese ternary LiNi
1-x-ymn
xco
y0
2the application of positive electrode is more and more extensive, but also has many problems.One, be that the powder body material synthesized is made up of random particle, granularity can not control, and bulk density is low, and volume and capacity ratio is low; Two, the Homogeneous phase mixing of multiple element is a difficult problem, has carried out large quantifier elimination both at home and abroad to this problem, and comprehensively external bibliographical information such as Kobayas states in the literature with M (CH
3cOO)
24H
2o (M=Co, Ni, Mn) as raw material, pre-burning 12 hours in air atmosphere at 500 DEG C, and then and LiOHH
2o mixing is pressed into block, roasting 24 hours again under 1000 DEG C of high temperature.The method synthesis is simple, is easy to suitability for industrialized production, but also there is obvious shortcoming.Three is that sintering temperature is high, the time is long, and energy consumption is high.Also just like adopting described in Chinese patent 03134689 with the oxide of the oxide of lithium, hydroxide or its salt and transition metal Co, Ni, Mn, hydroxide or their salt as main material, by mechanical mixture, then in sintering furnace, more than 900 DEG C, sinter nickel-cobalt-manganese ternary LiNi into
1-x-ymn
xco
y0
2positive electrode, in this product synthesized, the uneven properties of product that cause of nickel cobalt manganese element mixing are poor, and quality is unstable, and energy consumption is high.
Summary of the invention
In order to the particle diameter overcoming material in existing nickle cobalt lithium manganate battery material preparation method is difficult to control, the shortcomings such as product capacity is low, energy density is low; The object of the present invention is to provide a kind of method of liquid phase template synthesis spherical nickel-cobalt LiMn2O4, the method improves on the basis of the precipitation method, carrys out the elements such as nickel deposited cobalt manganese by adding wafer spherical template; Substrate specially for crystal nucleation increases the condition controlled, therefore can the particle diameter of Effective Regulation material, solves in prior art and controls the difficult problems such as battery material particle size distribution, properties of product are unstable.
Technical problem of the present invention is solved mainly through following technical proposals:
A method for liquid phase template synthesis spherical nickel-cobalt LiMn2O4, comprises the following steps:
(1) compound concentration is the aqueous slkali of 0.5 ~ 10mol/L respectively, and concentration is the additive complex solution of 0.1 ~ 5mol/L, and concentration is Ni, Co, Mn metal salt solution of 0.5 ~ 5mol/L;
(2) mixed solution step (1) prepared and aqueous slkali, additive complex solution join in the spherical hydroxide nucleus mother liquor of suitable reaction conditions, between adjust ph 7-13 with certain speed simultaneously;
(3) be 1:(0.1-3 by the mol ratio of nickel, cobalt, manganese element): the metallic solution of (0.1-3) joins in hydroxide nucleus solution; Make nickel, cobalt, manganese solution crystalline deposit on hydroxide nucleus; Suspension-turbid liquid is filtered, by drying precipitate, obtains nickel cobalt manganese hydroxide powder;
(4) in nickel cobalt manganese hydroxide powder, add lithium carbonate, make the mol ratio of nickel cobalt manganese hydroxide and lithium carbonate be 1:(1-1.5), mix, 6h is calcined at being placed in 250 DEG C-800 DEG C, be warming up to 800-1000 DEG C again, calcining 10-12h, obtains spherical nickel-cobalt LiMn2O4.
Further, step (1) is characterized in that nickel salt is the one in nickelous sulfate, nickel chloride or nickel nitrate, and cobalt salt is the one in cobaltous sulfate, cobalt chloride or cobalt nitrate, and manganese salt is the one in manganese sulfate, manganese chloride or manganese nitrate;
Step (2) is characterized in that interpolation speed is aqueous slkali, additive complex solution, metal salt solution join in reactor continuously with the flow velocity of 30 ~ 300L/h, 3 ~ 60L/h, 30 ~ 300L/h respectively, continuous stirring, control reaction temperature is 40-80 DEG C, mixing speed is 100 ~ 600rpm, carries out chemical precipitation and crystal growth.
Further, liquid phase template is spherical nickel hydroxide, cobalt hydroxide or manganous hydroxide.The spherical nickel-cobalt LiMn2O4 of preparation is spherical, and axial ratio is 1 ~ 2.
The present invention has following advantage and effect relative to prior art:
In the step of synthesizing spherical nickle cobalt lithium manganate of the present invention; It is little that nickel bores manganese sediment solubility product, and soon, solution degree of supersaturation is high for settling rate, and crystal nucleation is fast, and nucleus is little, easily forms colloidal precipitation, and pattern is wayward; And large two orders of magnitude of the more other two kinds of nickel cobalt sediments of manganese sediment solubility product, adopt nickel to bore manganese slaine and alkali and directly react and be difficult to synthesis and have spherical morphology presoma, also difficulty realizes uniform co-precipitation.The present invention is template used as nucleus, by affecting the diffusion velocity of nickel, cobalt, manganese ion, can control speed and the size of crystal growth, is conducive to regulating and controlling the character of synthetic material and performance, and the general and economical and effective of liquid phase template used.
Accompanying drawing explanation
Fig. 1 is the particle size distribution figure of spherical nickle cobalt lithium manganate prepared by the present invention.
Fig. 2 is the pattern Electronic Speculum figure of spherical nickle cobalt lithium manganate prepared by the present invention.
Fig. 3 is the gram volume figure of spherical nickel-cobalt LiMn2O4 prepared by the present invention.
Embodiment
Below by embodiment, and 1-3 by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment 1
(1) compound concentration is the aqueous slkali of 1mol/L respectively, and concentration is the additive complex solution of 0.1mol/L, and concentration is Ni, Co, Mn metal salt solution of 0.5mol/L;
(2) mixed solution step (1) prepared and aqueous slkali, additive complex solution join in the spherical hydroxide nucleus mother liquor of suitable reaction conditions with 300L/h, 60L/h, 280L/h speed simultaneously;
(3) be that the metallic solution of 1:0.1:0.1 joins in hydroxide nucleus solution by the mol ratio of nickel, cobalt, manganese element; Make nickel, cobalt, manganese solution crystalline deposit on hydroxide nucleus; Suspension-turbid liquid is filtered, by drying precipitate, obtains nickel cobalt manganese hydroxide powder;
(4) in nickel cobalt manganese hydroxide powder, add lithium carbonate, the mol ratio making nickel cobalt manganese hydroxide and lithium carbonate is 1:1, mixes, and calcines 6h at being placed in 600 DEG C, then is warming up to 800 DEG C, and calcining 10h, obtains spherical nickel-cobalt LiMn2O4.
Embodiment 2
(1) compound concentration is the aqueous slkali of 2mol/L respectively, and concentration is the additive complex solution of 0.15mol/L, and concentration is Ni, Co, Mn metal salt solution of 1mol/L;
(2) mixed solution step (1) prepared and aqueous slkali, additive complex solution join in the spherical hydroxide nucleus mother liquor of suitable reaction conditions with 160L/h, 30L/h, 158L/h speed simultaneously;
(3) be that the metallic solution of 1:0.3:0.3 joins in hydroxide nucleus solution by the mol ratio of nickel, cobalt, manganese element; Make nickel, cobalt, manganese solution crystalline deposit on hydroxide nucleus; Suspension-turbid liquid is filtered, by drying precipitate, obtains nickel cobalt manganese hydroxide powder;
(4) in nickel cobalt manganese hydroxide powder, add lithium carbonate, the mol ratio making nickel cobalt manganese hydroxide and lithium carbonate is 1:1.15, mixes, and calcines 6h at being placed in 500 DEG C, then is warming up to 900 DEG C, and calcining 11h, obtains spherical nickel-cobalt LiMn2O4.
Embodiment 3
(1) compound concentration is the aqueous slkali of 10mol/L respectively, and concentration is the additive complex solution of 5mol/L, and concentration is Ni, Co, Mn metal salt solution of 5mol/L;
(2) mixed solution step (1) prepared and aqueous slkali, additive complex solution join in the spherical hydroxide nucleus mother liquor of suitable reaction conditions with 30L/h, 10L/h, 29L/h speed simultaneously;
(3) be that the metallic solution of 1:3:3 joins in hydroxide nucleus solution by the mol ratio of nickel, cobalt, manganese element; Make nickel, cobalt, manganese solution crystalline deposit on hydroxide nucleus; Suspension-turbid liquid is filtered, by drying precipitate, obtains nickel cobalt manganese hydroxide powder;
(4) in nickel cobalt manganese hydroxide powder, add lithium carbonate, the mol ratio making nickel cobalt manganese hydroxide and lithium carbonate is 1:1.5, mixes, and calcines 6h at being placed in 800 DEG C, then is warming up to 1000 DEG C, and calcining 12h, obtains spherical nickel-cobalt LiMn2O4.
The present embodiment is the execution mode of example of the present invention; for those skilled in the art; on the basis that the invention discloses application process and principle; be easy to make various types of improvement or distortion; and the structure be not limited only to described by the above-mentioned embodiment of the present invention, therefore previously described mode is preferred version, and does not have restrictive meaning; every equivalence done according to the present invention changes and amendment, all in the scope protection range of claims of the present invention.
Claims (5)
1. a method for liquid phase template synthesis spherical nickel-cobalt LiMn2O4, is characterized in that comprising following processing step:
(1) compound concentration is the aqueous slkali of 0.5 ~ 10mol/L respectively, and concentration is the additive complex solution of 0.1 ~ 5mol/L, and concentration is Ni, Co, Mn metal salt solution of 0.5 ~ 5mol/L;
(2) mixed salt solution step (1) prepared and aqueous slkali, additive complex solution join in the spherical hydroxide nucleus mother liquor of suitable reaction conditions, between adjust ph 7-13 with certain speed simultaneously;
(3) be 1:(0.1-3 by the mol ratio of nickel, cobalt, manganese element): the metallic solution of (0.1-3) joins in hydroxide nucleus solution; Make nickel, cobalt, manganese solution crystalline deposit on hydroxide nucleus; Suspension-turbid liquid is filtered, by drying precipitate, obtains nickel cobalt manganese hydroxide powder;
(4) in nickel cobalt manganese hydroxide powder, add lithium carbonate, make the mol ratio of nickel cobalt manganese hydroxide and lithium carbonate be 1:(1-1.5), mix, 6h is calcined at being placed in 250 DEG C-800 DEG C, be warming up to 800-1000 DEG C again, calcining 10-12h, obtains spherical nickel-cobalt LiMn2O4.
2. the method for a kind of liquid phase template synthesis spherical nickel-cobalt LiMn2O4 according to claim 1, it is characterized in that: in step (1), nickel salt is the one in nickelous sulfate, nickel chloride or nickel nitrate, cobalt salt is the one in cobaltous sulfate, cobalt chloride or cobalt nitrate, and manganese salt is the one in manganese sulfate, manganese chloride or manganese nitrate.
3. the method for a kind of liquid phase template synthesis spherical nickel-cobalt LiMn2O4 according to claim 1, it is characterized in that: the middle interpolation speed of step (2) is aqueous slkali, additive complex solution, metal salt solution join in reactor continuously with the flow velocity of 30 ~ 300L/h, 3 ~ 60L/h, 30 ~ 300L/h respectively, continuous stirring, control reaction temperature is 40-80 DEG C, mixing speed is 100 ~ 600rpm, carries out chemical precipitation and crystal growth.
4. the method for a kind of liquid phase template synthesis spherical nickel-cobalt LiMn2O4 according to claim 1, is characterized in that: described liquid phase template is spherical nickel hydroxide, cobalt hydroxide or manganous hydroxide.
5. the method for a kind of liquid phase template synthesis spherical nickel-cobalt LiMn2O4 according to claim 1, is characterized in that: the spherical nickel-cobalt LiMn2O4 of preparation is spherical, and axial ratio is 1 ~ 2.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111717938A (en) * | 2020-06-22 | 2020-09-29 | 华友新能源科技（衢州）有限公司 | Narrowly distributed small-particle-size nickel-cobalt-aluminum hydroxide and preparation method thereof |
| CN111717939A (en) * | 2020-06-22 | 2020-09-29 | 华友新能源科技（衢州）有限公司 | Narrowly distributed large-particle-size nickel-cobalt-aluminum hydroxide and preparation method thereof |
| WO2021129139A1 (en) * | 2019-12-26 | 2021-07-01 | 蜂巢能源科技有限公司 | Binary lithium-rich carbonate precursor, preparation method therefor and application thereof |
| CN114314696A (en) * | 2022-01-05 | 2022-04-12 | 合肥国轩高科动力能源有限公司 | Preparation method of doped nano nickel-cobalt-manganese ternary precursor with hollow structure, prepared precursor and application |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021129139A1 (en) * | 2019-12-26 | 2021-07-01 | 蜂巢能源科技有限公司 | Binary lithium-rich carbonate precursor, preparation method therefor and application thereof |
| CN111717938A (en) * | 2020-06-22 | 2020-09-29 | 华友新能源科技（衢州）有限公司 | Narrowly distributed small-particle-size nickel-cobalt-aluminum hydroxide and preparation method thereof |
| CN111717939A (en) * | 2020-06-22 | 2020-09-29 | 华友新能源科技（衢州）有限公司 | Narrowly distributed large-particle-size nickel-cobalt-aluminum hydroxide and preparation method thereof |
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| CN114314696A (en) * | 2022-01-05 | 2022-04-12 | 合肥国轩高科动力能源有限公司 | Preparation method of doped nano nickel-cobalt-manganese ternary precursor with hollow structure, prepared precursor and application |
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Effective date of registration: 20161228 Address after: 341100 Jiangxi city of Ganzhou province Ganxian Economic Development Zone Gold Industrial Park Applicant after: Li Bin Address before: 341100 Jiangxi city of Ganzhou province Ganxian Economic Development Zone Gold Industrial Park Applicant before: Ganzhou Xinlong New Energy Materials Co.,Ltd. |
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Application publication date: 20160309 |