CN105489877A - Preparation method of high-voltage modified material lithium nickel manganese oxide for lithium-ion power battery - Google Patents
Preparation method of high-voltage modified material lithium nickel manganese oxide for lithium-ion power battery Download PDFInfo
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
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- 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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- 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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention discloses a preparation method of a high-voltage modified material lithium nickel manganese oxide for a lithium-ion power battery. The method comprises the following steps: mixing a manganese salt material with a nickel salt material to prepare a nickel-manganese precursor through a sol-gel method; mixing the nickel-manganese precursor with the lithium salt by a three-dimensional oblique type mixer; carrying out pre-sintering and high-temperature sintering, and doping metal cations for mixing; and finally carrying out low-temperature sintering, jet milling and grading to obtain a finished lithium nickel manganese oxide product. The method is few in control points and easy to produce; and the obtained product is good in stability.
Description
Technical field
The present invention relates to battery material technical field, particularly a kind of preparation method of battery material nickel ion doped.
Background technology
Lithium-ion-power cell is the most potential on-vehicle battery of generally acknowledging both at home and abroad at present, primarily of part compositions such as positive electrode, negative material, barrier film, electrolyte; Wherein, positive electrode is the important component part of lithium ion battery, is also the key factor determining performance of lithium ion battery; Therefore, from the viewpoint of resource, environmental protection and security performance, the ideal electrode active material finding lithium ion battery is still an international energy material supplier author primary difficult problem to be solved.
Business-like anode material for lithium-ion batteries mainly contains cobalt acid lithium (LiCoO at present
2), LiMn2O4 (LiMn
2o
4) and LiFePO4 (LiFePO
4); Cobalt acid lithium is the positive electrode being widely used in small-scale lithium ion cell at present, but because cobalt is poisonous, resource reserve is limited expensive, and the battery security assembled as positive electrode of cobalt acid lithium material and thermal stability bad, at high temperature can produce oxygen, can not meet the technical requirement of electrokinetic cell; Although LiMn2O4 is cheap, environmental protection, safety, high rate performance and security performance good, but its theoretical capacity is not high, recycle performance, thermal stability and high-temperature behavior poor, greatest problem is in the application that cycle performance is bad, particularly under high temperature, at the divalent manganesetion that particle surface is formed when the Manganic ion in material and large multiplying power discharging, make material dissolving in the electrolytic solution obvious, finally destroy the structure of LiMn2O4, also reduce the cycle performance of material; The lithium manganate material that commercially really can use at present is all obtained by modified measures, this modified measures needs the synthesis device of high standard on the one hand, also need to be reduce the reversible capacity of material for cost on the other hand, so these materials are to being difficult to realize substituting of cobalt acid lithium so far; LiFePO4 is the Olivine-type Cathode Material in Li-ion Batteries causing extensive concern in recent years, it has superior security performance and good recycles performance, there is good application prospect, but the tap density of this material is little and voltage platform is lower, therefore specific energy is low after being made into battery, it is made to be not suitable for being applied to the occasion of high-energy-density requirement.
With regard to current technology, this several positive electrode of commercialization all at below 4V, thus limits the power of battery relative to the voltage of graphite cathode, therefore, and the LiMn of the Ni doping of exploitation high voltage, high power capacity, safety and good cycle
2o
4there is 5V level LiNi
0.5mn
1.5o
4, the development of high power lithium ion power battery used for electric vehicle is had important practical significance.
Summary of the invention
The invention provides a kind of preparation method of high voltage modification lithium-ion power battery material nickel ion doped, obtained nickel ion doped has 5.0V high potential discharge platform, can provide higher operating voltage and energy and power density.
For achieving the above object, technical scheme of the present invention is:
A preparation method for high voltage modification lithium-ion power battery material nickel ion doped, comprises the following steps:
(1) manganese salt, nickel salt material preparation: by manganese salt, nickel salt material by Mn:Ni mol ratio be 3:1 carry out batching mixing;
(2) sol-gal process prepares nickel manganese presoma: add in chelating agent by the mixture of step (1) gained, regulate pH 8 ~ 10 with ammonium hydrogencarbonate, be stirred to thickness, pure water is added under stirring, be made into the solution that metal M n+Ni ion concentration is 100 ~ 150g/l, add settling agent to precipitating completely, filtering, drying precipitate, obtains nickel manganese presoma;
(3) three-dimensional inclined mixing: adopt three-dimensional inclined mixer the nickel manganese presoma of step (2) gained and lithium salts to be carried out disperseing, mixing 2 ~ 4h under medium, obtain intermediate mixture;
(4) presintering: the intermediate mixture of step (3) gained is loaded saggar, send into pushed bat kiln and sinter, sintering process is continual is filled with oxygen, sintering temperature 500 ~ 600 DEG C, and constant temperature time 4 ~ 6h, obtains pre-sintered mass;
(5) high temperature sintering: the pre-sintered mass of step (4) gained is loaded saggar, send into pushed bat kiln to sinter, sintering process is continual is filled with oxygen, sintering temperature 800 ~ 900 DEG C, constant temperature time 9.5 ~ 10.5h, obtains high temperature sintering material;
(6) doping mixing: adopt three-dimensional inclined mixer the high temperature sintering material of step (5) gained and metal cation to be carried out disperseing, mixing under medium, incorporation time is 2.5 ~ 3.5h, obtains doping material;
(7) third time low-temperature sintering: by the doping material of step (6) gained sinter, sintering temperature is 300 ~ 400 DEG C, constant temperature time 4 ~ 6h;
(8) reprocessing: the product that step (7) obtains is carried out air-flow crushing, classification and namely obtain high voltage modification lithium-ion power battery material nickel ion doped finished product.
Further, in step (3), in nickel manganese presoma, in Mn+Ni and lithium salts, the mol ratio of Li is (0.95 ~ 1.0): 1.
Further, in step (1), described manganese salt material is one or more in manganese sulfate, manganese nitrate, manganese chloride; Described nickel salt material is one or more in nickelous sulfate, nickel chloride, nickelous sulfate; In step (3), described lithium salt material is lithium carbonate.
Wherein, to the quality requirement of lithium carbonate be: by mass concentration, Li
2cO
3>=99.5%, Li>=18.7%, Na≤200ppm, K≤200ppm, Ca≤100ppm, Mg≤100ppm, Fe≤50ppm, Cl
-≤ 0.15%, and tap density>=2.1g/cm
3, apparent density>=1.2g/cm
3.
Further, in step (6), described metal cation is Mg
2+, La
3+, Ti
4+or Al
3+; Further, high temperature sintering material mixes with metal cation, and wherein, the mass ratio of metal M n+Ni, metal cation derived compound is 1000:(4.5 ~ 2).
Further, the medium that in described step (3) and step (6), inclined mixing adopts is the one in zirconia ball or polyurethane ball.
In described step (3), the medium that three oblique inclined mixing adopt is zirconia ball or polyurethane ball.
Further, in step (2), described chelating agent is one or both in PEG-6000, Polyethylene glycol-2000, PEG-4000 and PEG-6000 0.
Further, in step (2), the quality of described chelating agent is 80% ~ 120% of metal M n+Ni quality.
Further, in step (2), described settling agent is CMC, and its quality added is 3% ~ 5% of metal M n+Ni quality.
The preparation method of above-described high voltage modification lithium-ion power battery material nickel ion doped, has following advantage:
(1) batch mixing uniformity is better: adopt special three-dimensional inclined mixing procedure, raw material are mixed close to molecular level level.
(2) excellent product performance: in the process of presintering, by metallic ion-doping modification technology, effectively improves the high-temperature behavior of nickel ion doped, processing characteristics and cycle performance; In addition, also adopt the jet mill grinding equipment of improvement to carry out reprocessing to finished product, the product granularity produced is moderate and be evenly distributed, and tap density is large, makes it in lithium ion battery production process, have good processing characteristics.
(3) to raw material and equipment requirement lower: this method adopts succinct technological process, makes it to be easier to industrialization; Raw materials and equipment all originate from domestic manufacturer, greatly reduce industrialization cost.
(4) product stability is better: this programme is few due to control point, is easy to produce, properties of product good stability.
(5) there is the advantages such as investment is less, technically reliable, operating cost are low, there is good economic benefit, there is good market popularization value.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described, but protection scope of the present invention and range of application are not limited to following examples:
One, the preparation of nickel ion doped
Embodiment 1
(1) manganese salt, nickel salt material preparation: by manganese sulfate, nickelous sulfate material by Mn:Ni mol ratio be 3:1 carry out batching mixing;
(2) sol-gal process prepares nickel manganese presoma: add in chelating agent PEG-6000 by the mixture of step (1) gained, the quality of chelating agent is 120% of metal M n+Ni quality, regulate pH 8 ~ 10 with ammonium hydrogencarbonate, be stirred to thickness, pure water is added under stirring, be made into the solution that metal M n+Ni ion concentration is 100g/l, adding quality is that the settling agent CMC of 3% of metal M n+Ni quality is to precipitating completely, filter, drying precipitate, obtains nickel manganese presoma;
(3) three-dimensional inclined mixing: adopt three-dimensional inclined mixer the nickel manganese presoma of step (2) gained and lithium carbonate to be carried out disperseing, mixing 2h under polyurethane ball is medium, metal (Mn+Ni): Li mol ratio is 0.95:1, obtains intermediate mixture;
(4) presintering: the intermediate mixture of step (3) gained is loaded saggar, send into pushed bat kiln and sinter, sintering process is continual is filled with oxygen, sintering temperature 500 DEG C, and constant temperature time 6h, obtains pre-sintered mass;
(5) high temperature sintering: the pre-sintered mass of step (4) gained is loaded saggar, send into pushed bat kiln and sinter, sintering process is continual is filled with oxygen, sintering temperature 900 DEG C, and constant temperature time 9.5h, obtains high temperature sintering material;
(6) doping mixing: adopt three-dimensional inclined mixer by the high temperature sintering material of step (5) gained and cation Mg
2+carry out disperseing, mixing under medium polyurethane ball, wherein, Mg
2+the quality of source preferred MgO, MgO be 0.45% of metal M n+Ni quality, incorporation time is 2.5h, obtains doping material;
(7) third time low-temperature sintering: by the doping material of step (6) gained sinter, sintering temperature is 400 DEG C, constant temperature time 4h;
(8) reprocessing: the product that step (7) obtains is carried out air-flow crushing, classification and namely obtain high voltage modification lithium-ion power battery material nickel ion doped finished product.
Embodiment 2
(1) manganese salt, nickel salt material preparation: by manganese nitrate, nickel nitrate material by Mn:Ni mol ratio be 3:1 carry out batching mixing;
(2) sol-gal process prepares nickel manganese presoma: add in chelating agent PEG-4000 by the mixture of step (1) gained, the quality of chelating agent is 100% of metal M n+Ni quality, regulate pH 8 ~ 10 with ammonium hydrogencarbonate, be stirred to thickness, pure water is added under stirring, be made into the solution that metal M n+Ni ion concentration is 120g/l, adding quality is that the settling agent CMC of 5% of metal M n+Ni quality is to precipitating completely, filter, drying precipitate, obtains nickel manganese presoma;
(3) three-dimensional inclined mixing: adopt three-dimensional inclined mixer the nickel manganese presoma of step (2) gained and lithium carbonate to be carried out disperseing, mixing 4h under zirconia ball is medium, metal (Mn+Ni): Li mol ratio is 0.98:1, obtains intermediate mixture;
(4) presintering: the intermediate mixture of step (3) gained is loaded saggar, send into pushed bat kiln and sinter, sintering process is continual is filled with oxygen, sintering temperature 600 DEG C, and constant temperature time 4h, obtains pre-sintered mass;
(5) high temperature sintering: the pre-sintered mass of step (4) gained is loaded saggar, send into pushed bat kiln and sinter, sintering process is continual is filled with oxygen, sintering temperature 800 DEG C, and constant temperature time 10.5h, obtains high temperature sintering material;
(6) doping mixing: adopt three-dimensional inclined mixer by the high temperature sintering material of step (5) gained and metal cation Ti
4+carry out disperseing, mixing under medium oxidizing zirconium ball, wherein, Ti
4+the preferred TiO in source
2, TiO
2quality be 0.2% of metal M n+Ni quality, incorporation time is 3.5h, obtains doping material;
(7) third time low-temperature sintering: by the doping material of step (6) gained sinter, sintering temperature is 300 DEG C, constant temperature time 6h;
(8) reprocessing: the product that step (7) obtains is carried out air-flow crushing, classification and namely obtain high voltage modification lithium-ion power battery material nickel ion doped finished product.
Embodiment 3
(1) manganese salt, nickel salt material preparation: by manganese chloride, nickel chloride material by Mn:Ni mol ratio be 3:1 carry out batching mixing;
(2) sol-gal process prepares nickel manganese presoma: the mixture of step (1) gained is added chelating agent Polyethylene glycol-2000, the quality of chelating agent is 80% of metal M n+Ni quality, regulate pH 8 ~ 10 with ammonium hydrogencarbonate, be stirred to thickness, pure water is added under stirring, be made into the solution that metal M n+Ni ion concentration is 150g/l, adding quality is that the settling agent CMC of 4% of metal M n+Ni quality is to precipitating completely, filter, drying precipitate, obtains nickel manganese presoma;
(3) three-dimensional inclined mixing: adopt three-dimensional inclined mixer the nickel manganese presoma of step (2) gained and lithium carbonate to be carried out disperseing, mixing 3h under polyurethane ball is medium, metal (Mn+Ni): Li mol ratio is 1:1, obtains intermediate mixture;
(4) presintering: the intermediate mixture of step (3) gained is loaded saggar, send into pushed bat kiln and sinter, sintering process is continual is filled with oxygen, sintering temperature 550 DEG C, and constant temperature time 5h, obtains pre-sintered mass;
(5) high temperature sintering: the pre-sintered mass of step (4) gained is loaded saggar, send into pushed bat kiln and sinter, sintering process is continual is filled with oxygen, sintering temperature 850 DEG C, and constant temperature time 10h, obtains high temperature sintering material;
(6) doping mixing: adopt three-dimensional inclined mixer by the high temperature sintering material of step (5) gained and metal cation Al
3+carry out disperseing, mixing under medium polyurethane ball, wherein, Al
3+the preferred Al in source
2o
3, Al
2o
3quality be 0.3% of metal M n+Ni quality, incorporation time is 3h, obtains doping material;
(7) third time low-temperature sintering: by the doping material of step (6) gained sinter, sintering temperature is 350 DEG C, constant temperature time 5h;
(8) reprocessing: the product that step (7) obtains is carried out air-flow crushing, classification and namely obtain high voltage modification lithium-ion power battery material nickel ion doped finished product.
Embodiment 4
(1) manganese salt, nickel salt material preparation: by manganese sulfate, nickelous sulfate material by Mn:Ni mol ratio be 3:1 carry out batching mixing;
(2) sol-gal process prepares nickel manganese presoma: the mixture of step (1) gained is added chelating agent PEG-6000 0, the quality of chelating agent is 80% of metal M n+Ni quality, regulate pH 8 ~ 10 with ammonium hydrogencarbonate, be stirred to thickness, pure water is added under stirring, be made into the solution that metal M n+Ni ion concentration is 140g/l, adding quality is that the settling agent CMC of 4% of metal M n+Ni quality is to precipitating completely, filter, drying precipitate, obtains nickel manganese presoma;
(3) three-dimensional inclined mixing: adopt three-dimensional inclined mixer the nickel manganese presoma of step (2) gained and lithium carbonate to be carried out disperseing, mixing 3h under polyurethane ball is medium, metal (Mn+Ni): Li mol ratio is 0.96:1, obtains intermediate mixture;
(4) presintering: the intermediate mixture of step (3) gained is loaded saggar, send into pushed bat kiln and sinter, sintering process is continual is filled with oxygen, sintering temperature 560 DEG C, and constant temperature time 5h, obtains pre-sintered mass;
(5) high temperature sintering: the pre-sintered mass of step (4) gained is loaded saggar, send into pushed bat kiln and sinter, sintering process is continual is filled with oxygen, sintering temperature 840 DEG C, and constant temperature time 10h, obtains high temperature sintering material;
(6) doping mixing: adopt three-dimensional inclined mixer by the high temperature sintering material of step (5) gained and metal cation La
3+carry out disperseing, mixing under medium polyurethane ball, wherein, La
3+the preferred La in source
2o
3, La
2o
3quality be 0.25% of metal M n+Ni quality, incorporation time is 3h, obtains doping material;
(7) third time low-temperature sintering: by the doping material of step (6) gained sinter, sintering temperature is 330 DEG C, constant temperature time 5h;
(8) reprocessing: the product that step (7) obtains is carried out air-flow crushing, classification and namely obtain high voltage modification lithium-ion power battery material nickel ion doped finished product.
In above-described embodiment 1 ~ 4, for improving the product quality of nickel ion doped, raw material should select manganese salt, nickel salt and the lithium salts that the magazine constituent contents such as Fe, Na, Ca, S are lower, wherein, are: Li to the quality requirement of lithium carbonate
2cO
3>=99.5%, Li>=18.7%, Na≤200ppm, K≤200ppm, Ca≤100ppm, Mg≤100ppm, Fe≤50ppm, and tap density>=2.1g/cm
3, apparent density>=1.2g/cm
3.
Two, the nickel ion doped performance test that distinct methods is obtained
Claims (10)
1. a preparation method for high voltage modification lithium-ion power battery material nickel ion doped, is characterized in that comprising the following steps:
(1) manganese salt, nickel salt material preparation: by manganese salt, nickel salt material by Mn:Ni mol ratio be 3:1 carry out batching mixing;
(2) sol-gal process prepares nickel manganese presoma: add in chelating agent by the mixture of step (1) gained, regulate pH 8 ~ 10 with ammonium hydrogencarbonate, be stirred to thickness, pure water is added under stirring, be made into the solution that metal M n+Ni ion concentration is 100 ~ 150g/l, add settling agent to precipitating completely, filtering, drying precipitate, obtains nickel manganese presoma;
(3) three-dimensional inclined mixing: adopt three-dimensional inclined mixer the nickel manganese presoma of step (2) gained and lithium salts to be carried out disperseing, mixing 2 ~ 4h under medium, obtain intermediate mixture;
(4) presintering: the intermediate mixture of step (3) gained is loaded saggar, send into pushed bat kiln and sinter, sintering process is continual is filled with oxygen, sintering temperature 500 ~ 600 DEG C, and constant temperature time 4 ~ 6h, obtains pre-sintered mass;
(5) high temperature sintering: the pre-sintered mass of step (4) gained is loaded saggar, send into pushed bat kiln to sinter, sintering process is continual is filled with oxygen, sintering temperature 800 ~ 900 DEG C, constant temperature time 9.5 ~ 10.5h, obtains high temperature sintering material;
(6) doping mixing: adopt three-dimensional inclined mixer the high temperature sintering material of step (5) gained and metal cation to be carried out disperseing, mixing under medium, incorporation time is 2.5 ~ 3.5h, obtains doping material;
(7) third time low-temperature sintering: by the doping material of step (6) gained sinter, sintering temperature is 300 ~ 400 DEG C, constant temperature time 4 ~ 6h;
(8) reprocessing: the product that step (7) obtains is carried out air-flow crushing, classification and namely obtain high voltage modification lithium-ion power battery material nickel ion doped finished product.
2. the preparation method of high voltage modification lithium-ion power battery material nickel ion doped according to claim 1, it is characterized in that: in step (3), in nickel manganese presoma, in Mn+Ni and lithium salts, the mol ratio of Li is (0.95 ~ 1.0): 1.
3. the preparation method of high voltage modification lithium-ion power battery material nickel ion doped according to claim 1, is characterized in that: in step (1), and described manganese salt material is one or more in manganese sulfate, manganese nitrate, manganese chloride; Described nickel salt material is one or more in nickelous sulfate, nickel chloride, nickelous sulfate; In step (3), described lithium salt material is lithium carbonate.
4. the preparation method of high voltage modification lithium-ion power battery material nickel ion doped according to claim 1, it is characterized in that: in step (6), described metal cation is Mg
2+, La
3+, Ti
4+or Al
3+.
5. the preparation method of high voltage modification lithium-ion power battery material nickel ion doped according to claim 4, it is characterized in that: in step (6), high temperature sintering material mixes with metal cation, wherein, the mass ratio of metal M n+Ni, metal cation derived compound is 1000:(4.5 ~ 2).
6. the preparation method of high voltage modification lithium-ion power battery material nickel ion doped according to claim 1, is characterized in that: the medium that in described step (3) and step (6), inclined mixing adopts is the one in zirconia ball or polyurethane ball.
7. the preparation method of high voltage modification lithium-ion power battery material nickel ion doped according to claim 3, is characterized in that: the quality requirement of lithium carbonate is: by mass concentration, Li
2cO
3>=99.5%, Li>=18.7%, Na≤200ppm, K≤200ppm, Ca≤100ppm, Mg≤100ppm, Fe≤50ppm, Cl
-≤ 0.15%, and tap density>=2.1g/cm
3, apparent density>=1.2g/cm
3.
8. the preparation method of high voltage modification lithium-ion power battery material nickel ion doped according to claim 1, it is characterized in that: in step (2), described chelating agent is one or both in PEG-6000, Polyethylene glycol-2000, PEG-4000 and PEG-6000 0.
9. the preparation method of high voltage modification lithium-ion power battery material nickel ion doped according to claim 1, it is characterized in that: in step (2), the quality of described chelating agent is 80 ~ 120% of metal M n+Ni quality.
10. the preparation method of high voltage modification lithium-ion power battery material nickel ion doped according to claim 1, it is characterized in that: in step (2), described settling agent is CMC, and its quality added is 3 ~ 5% of metal M n+Ni quality.
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| CN108023081A (en) * | 2017-12-01 | 2018-05-11 | 洛阳师范学院 | A kind of preparation method of the nickel lithium manganate cathode material of Al doping vario-properties |
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