CN109585792A - A kind of preparation of anode material for lithium-ion batteries and its method of modifying - Google Patents
A kind of preparation of anode material for lithium-ion batteries and its method of modifying Download PDFInfo
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- CN109585792A CN109585792A CN201710897307.XA CN201710897307A CN109585792A CN 109585792 A CN109585792 A CN 109585792A CN 201710897307 A CN201710897307 A CN 201710897307A CN 109585792 A CN109585792 A CN 109585792A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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- 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a kind of anode material for lithium-ion batteries of bulk phase-doped metallic element and the preparation methods that are coated to it, invention is related to secondary cell field, a kind of anode material for lithium-ion batteries more particularly to bulk phase-doped metallic element and the preparation method that high stability oxide coating modification is carried out to it.The present invention carries out doping of the metallic element to manganese base lithium ion cell positive material using the coprecipitation method of one ethanol system of water, high stability oxide is carried out to the cladding present invention of positive electrode to basis material doping vario-property using water-ethanol system liquid phase method, improves the specific discharge capacity of material；Cladding then reduces side reaction between positive electrode and electrolyte, and positive electrode is made to have better cycle performance, and fine and close uniform clad reduces the lithium ion in charge and discharge process and consumes, and improves the capacity of material and improves high rate performance.Anode material for lithium-ion batteries of the invention is used for field of batteries.
Description
Technical field
The invention belongs to bury ion battery positive electrode to prepare field, specifically a kind of metallic element adulterates manganese base lithium ion
Cell positive material simultaneously carries out the modified preparation method in surface to it.
Technical background
Chemical energy source is the key link of current great new energy technology development, have operating voltage is high, energy density is big,
The lithium ion battery for the advantages that having extended cycle life, is pollution-free and be widely used and develop.In order to meet in electric vehicle, mix
The large-scale application for closing power car, sustainable energy storage etc., to the energy density of lithium ion battery, cycle performance and peace
More stringent requirements are proposed for full performance, and wherein positive electrode study on the modification is one for improving lithium ion battery these aspects and developing
A important research direction.
Manganese-based anode material includes the ternary material LiNi of stratiformXCo1-X-yMnyO2, stratiform richness Li material xLi2MnO3·
(1-x)LiNi1/3Mn1/3Co1/3O2(0 < x < 0.5), spinelle LiNi0.5Mn1.5O4, spinelle LiMn2O4.Due to its corresponding Li
Ion battery has very high energy and power density and low cost, high circulation performance, thus obtained close concern and
Research.But due in Mn-based material metallic element especially Mn ion easily dissolve out and negative terminal surface deposit, prevent Li ion
Quick diffusion, and cause battery capacity attenuation in cyclic process very fast, prevent the further big rule of manganese base electrode material
Mould application.
In order to improve manganese-based anode material, common method is that positive electrode is doped and is adopted using metallic element
It is coated with high stability metallic element, stablizes positive electrode lattice structure, reduce metal especially manganese the amount of dissolution, Jin Erti
The multiplying power and cycle performance of high battery；Positive electrode is coated using metallic element, positive electrode and electrolysis can be inhibited
Liquid contact, reduces erosion of the electrolyte to positive electrode, and positive electrode is made to have a higher specific discharge capacity, better multiplying power and
Cycle performance, while the interface resistance of electrolyte and electrode material is smaller.
Summary of the invention
In view of the deficiencies of the prior art, the present invention propose a kind of metallic element adulterate and use high stability metal oxide into
The modified preparation method of row cladding manganese base lithium ion cell positive material, this method effectively improve existing lithium ion battery
The low problem of discharge capacity, effectively improves the interface membrane impedance of electrolyte and positive electrode after manganese-based anode material doping,
And circulation and high rate performance can be significantly improved.
Technical solution of the present invention the following steps are included:
A kind of doping of metallic element simultaneously carries out cladding manganese base lithium ion cell positive material with high stability metal oxide
Modified preparation method, which is characterized in that using one ethanol system of water coprecipitation method carry out metallic element to manganese base lithium from
The doping of sub- cell positive material carries out high stability oxide cladding to the positive electrode after doping using solwution method, including
Following steps:
(1) it is weighed in the ratio between the amount of manganese base lithium ion cell positive material and the corresponding substance of doped metallic elements ratio
The acetate of corresponding metallic element, is dissolved in the mixed solution of water and ethyl alcohol and being stirred, and acetate total concentration is 0.01-
0.5mo1/L, wherein the volume ratio of second alcohol and water is 0-20:1；
(2) oxalic acid is dissolved in the mixed solution of deionized water and ethyl alcohol, concentration of oxalic acid 0.1-0.5mol/L, ethyl alcohol and
The volume ratio of water is 0-20:1；
(3) the acetic acid mixed salt solution that step (1) obtains is quickly poured into the oxalic acid mixed solution that step (2) obtains,
It is stirred at room temperature, evaporates, obtain oxalate precursor；
(4) oxalate precursor is preheated under the conditions of 450 DEG C, is then calcined under the conditions of 800-850 DEG C to get metal
The manganese base lithium ion cell positive material of element doping；
(5) according to Sc2O3The amount for accounting for positive electrode mass fraction 0.5-2% weighs Sc (NO3)3·6H20, it is dissolved in deionization
Water is configured to the scandium nitrate solution that concentration is 0.01-0.1mo1/L, the positive electrode powder that step 4 obtains is distributed to nitric acid
In scandium solution, 0.5h is stirred at room temperature with magnetic stirring apparatus, it is dry, obtain Sc2O3Before coated lithium ion battery positive electrode
Drive body；By Sc2O3The presoma of coated lithium ion battery positive electrode is heat-treated 5h at 400-600 DEG C to get metal ion is arrived
Doping vario-property simultaneously uses Sc2O3The manganese base lithium ion cell positive material of cladding.
Step (1) the manganese base clang ion battery positive electrode includes the ternary material LiNi of stratiformXCo1-X-yMnyO2(x,y
Indicate constituent content), stratiform richness Li material xLi2MnO3·(1-x)LiNi1/3Mn1/3Co1/3O2(0 < x < 0.5), spinelle
LiNi0.5Mn1.5O4, spinelle LiMn2O4。
The doped metallic elements of the step (1) are at least one of Fe, Ti, Cr, Al, Mg, Mo, Co, Ni, doping side
Formula is metallic flat or dibit doping of the manganese base lithium ion cell positive material in addition to Li, the ratio a's of the doped chemical
Range be O < a≤0.5m, wherein m for institute's doped chemical position in Mn-based material ratio.
Step (4) preheating time is 8-10h, and the calcination time is 15-20h, and heating rate is 5 DEG C/min.
Step (3) mixing time is 5h, evaporation conditions are as follows: be evaporated to solvent under the conditions of 90 DEG C and volatilize completely.
Drying condition in the step (5) are as follows: dry 10h in 80-120 DEG C of baking oven.Sintering temperature is 800-900 DEG C, is burnt
The knot time is 12-20h.
Beneficial effects of the present invention: the manganese that the metallic element that the present invention obtains is adulterated and coated using high stability oxide
Base lithium ion cell positive material stablizes positive electrode lattice structure, reduces metal especially manganese the amount of dissolution, high stability oxidation
Object is coated on positive electrode surface and forms fine and close uniform clad, it is suppressed that the side reaction of electrolyte and electrode material, i.e.,
Reduce the interface resistance of electrolyte and electrode material；Clad is inhibited to be formed on manganese-based active materials surface and is passivated simultaneously
Film reduces lithium ion consumption, improves capacity and improves high rate performance；Positive electrode prepared by the present invention has preparation simple
Convenient advantage, the method for the present invention prepare lithium ion battery with preferable high rate performance and stronger cyclical stability, electrolysis
The interface impedance of liquid and positive electrode is smaller.
Detailed description of the invention
Fig. 1 is that conventional method and the Fe of the method for the present invention preparation adulterate nickel ion doped material LiNi in embodiment 10.5- xMm1.5-xFe2x04(x=0.05) high rate performance comparison diagram.
Fig. 2 is that conventional method and the Fe of the method for the present invention preparation adulterate nickel ion doped material LiNi in embodiment 10.5- xMm1.5-xFe2x04(x=0.05) cycle performance comparison diagram.
Fig. 3 is that the Co that conventional method is synthesized with this patent method in embodiment 2 adulterates lithium-rich lithium ion cell positive
Material Li1.2Ni0.19Co0.01Mn0.6O2High rate performance comparison diagram.
Fig. 4 is that the Co that conventional method is synthesized with this patent method in embodiment 2 adulterates lithium-rich lithium ion cell positive
Material Li1.2Ni0.19Co0.01Mn0.6O2Cycle performance comparison diagram.
Fig. 5 is that the Co that conventional method is synthesized with this patent method in embodiment 4 adulterates Sc2O3Coat lithium-rich lithium ion
Cell positive material Li1.2Ni0.19Co0.01Mn0.6O2@Sc2O3High rate performance comparison diagram.
Fig. 6 is that the Co that conventional method is synthesized with this patent method in embodiment 4 adulterates Sc2O3Coat lithium-rich lithium ion
Cell positive material Li1.2Ni0.19Co0.01Mn0.6O2@Sc2O3Cycle performance comparison diagram.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and specific embodiments.Following embodiment is intended to illustrate
Invention rather than limitation of the invention further.
Embodiment 1
Fe adulterates nickel mangaic acid clang material LiNi0.5-xMm1.5-xFe2x04(x=0.05) preparation
1, by 0.268g LiCH3COO·2H2O、0.280g Ni(CHsCOO)·2H2O、0.888g Mn(CH3COO)·
4H2O、0.0615g Fe(CH3COO)2·4H2O is dissolved in 20mL deionized water, and 80mL ethyl alcohol is added and is stirred, obtains metal
Salting liquid.
2, by the H of 0.780g2C2O4It is dissolved in 30mL deionized water, forms oxalic acid solution.
3, metal salt solution is quickly poured into oxalic acid solution and stirs 5h, evaporated 10h at 80 DEG C later, obtain oxalates
Presoma precipitating.
4, it heats up according to 5C/min rate, by pre-burning 8h under the conditions of oxalate precursor precipitating in air 450 DEG C, later
By same heating rate to 800 DEG C of calcination 15h to get arrive target product LiNi0.45Mn1.45Fe0.1O4。
The nickel ion doped material LiNi that prepared Fe is adulterated0.5-xMm1.5-xFe2x04(x=0.05) and Solid phase synthesis
Fe doping nickel ion doped material be assembled into 2032 type button cells carry out electro-chemical test, Fig. 1, Fig. 2 are respectively two kinds of materials
The multiplying power and cycle performance of material compare.Wherein Solid phase synthesis Fe doping nickel ion doped material different multiplying (0.2C,
0.5C, 1C, 2C, 5C) under charge and discharge, corresponding specific discharge capacity is respectively 136.1,135.4,134.9,134.1,
130.7mAh/g.It is 88.4% that 10C, which recycles 50 weeks capacity retention ratios,.Embodiment 1 obtains different times of Fe doping nickel ion doped material
Charge and discharge under rate (0.2C, 0.5C, 1C, 2C, 5C), corresponding specific discharge capacity is respectively 149.0,148.4,147.5,147.2,
146.5mAh/g.It is 94.4% that 10C, which recycles 50 weeks capacity retention ratios,.
Embodiment 2
Co adulterates rich clang layered lithium ion battery positive electrode Li1.2Ni0.19Co0.01Mn0.6O2Preparation
1, by 0.402g LiCH3COO·2H2O、0.149g Ni(CHsCOO)2·2H2O、0.460g Mn(CHsCOO)2·
4H2O、0.050g Co(CH3COO)2·4H2O is dissolved in 20mL deionized water, is added 80mL ethyl alcohol and is stirred, obtains metal
Salting liquid.
2, by the H of 0.570g2C2O4It is dissolved in 10mL deionized water and 40ml ethyl alcohol, forms oxalic acid solution.
3, metal salt solution is quickly poured into oxalic acid solution and stirs 5h, evaporated 10h at 80 DEG C later, obtain oxalates
Presoma precipitating.
4, it heats up according to 5 DEG C/min rate, oxalate precursor is precipitated into 450 DEG C of pre-burning 8h in air, later by same
The heating rate of sample is warming up to 850 DEG C of calcination 20h to get target product Li is arrived1.2Ni0.19Co0.01Mn0.6O2。
The rich clang stratified material Li that prepared Co is adulterated1.2Ni0.19Co0.01Mn0.6O2With conventional Co deposited synthesis
Cu doping lithium-rich material be assembled into 2032 type button cells carry out electro-chemical test, Fig. 3, Fig. 4 are respectively two kinds of materials
The multiplying power and cycle performance of material compare.The lithium-rich material different multiplying of the Co doping of conventional Co deposited synthesis as the result is shown
Charge and discharge under (0.2C, 0.5C, 1C, 2C, 5C), corresponding specific discharge capacity is respectively 221.1,217.2,208.6,199.8,
187.3mAh/g.It is 81.3% that 1C, which recycles 50 weeks capacity retention ratios,.The Co for the method synthesis that the embodiment of the present invention 2 provides adulterates rich
Charge and discharge under lithium stratified material different multiplying (0.2C, 0.5C, 1C, 2C, 5C), corresponding specific discharge capacity is respectively 235.8,
227.1,220.6,209.8,199.4mAh/g.It is 93.2% that 1C, which recycles 50 weeks capacity retention ratios,.
Embodiment 3
Cr, Co codope nickel ion doped material LiNi0.45Mn1.45Co0.06Cr0.05O4Preparation
1, by 0.268gLiCH3COO·2H2O, 0.280gNi (CH3COO)2·2H2O, 0.888g Mn (CH3COO)2·
4H2O, 0.031g Co (CH3COO)z·4H2O, 0.029g Cr (CCH3COO)2It is dissolved in 20mL deionized water, adds 80mL
Ethyl alcohol is stirred, and obtains metal salt solution.
2, by the H of 0.78g2C2O4It is dissolved in 40mL deionized water, obtains oxalic acid solution.
3, metal salt solution is quickly poured into oxalic acid solution and stirs 5h, evaporated 10h at 80 DEG C later, obtain oxalates
Presoma precipitating.
4, it heats up according to 5 DEG C/min rate, oxalate precursor is precipitated into 450 DEG C of pre-burning 8h in air, later by same
The heating rate of sample arrives target product LiNi to 850 DEG C of calcination 20h0.45Mn1.45Co0.06Cr0.05O4。
By prepared Co, the nickel mangaic acid clang material LiNi of Cr codope0.45Mn1.45Co0.06Cr0.05O4It is assembled into 2032 types
Button cell carries out electro-chemical test, Co as the result is shown, Cr codope nickel mangaic acid clang material different multiplying (0.2C, 0.5C, 1C,
2C, 5C) under charge and discharge, corresponding specific discharge capacity is respectively 147.2,141.7,147.8,136.5,129.2mAh/g.5C is followed
50 weeks capacity retention ratios of ring are 93%.
Embodiment 4
1, by 0.402g LiCH3COO·2H2O、0.149g Ni(CHsCOO)2·2H2O、0.460g Mn(CHsCOO)2·
4H2O、0.050g Co(CH3COO)2·4H2O is dissolved in 20mL deionized water, is added 80mL ethyl alcohol and is stirred, obtains metal
Salting liquid.
2, by the H of 0.570g2C2O4It is dissolved in 10mL deionized water and 40ml ethyl alcohol, forms oxalic acid solution.
3, metal salt solution is quickly poured into oxalic acid solution and stirs 5h, evaporated 10h at 80 DEG C later, obtain oxalates
Presoma precipitating.
4, it heats up according to 5 DEG C/min rate, oxalate precursor is precipitated into 450 DEG C of pre-burning 8h in air, later by same
The heating rate of sample is warming up to 850 DEG C of calcination 20h to get matrix product Li is arrived1.2Ni0.19Co0.01Mn0.6O2。
5,0.09g Sc (NO is weighed3)3·6H20 is dissolved in 20mL deionized water, is configured to scandium nitrate solution, will
Li1.2Ni0.19Co0.01Mn0.6O2Matrix powder is distributed in scandium nitrate solution, is stirred at room temperature 0.5h with magnetic stirring apparatus, and 80
Dry 10h at DEG C is heat-treated 5h at 600 DEG C then to get target high-performance Sc is arrived2O3The stratiform richness lithium ion electricity of cladding
Pond positive electrode.
By prepared Sc2O3Stratiform richness lithium ion battery positive electrode and the uncoated basis material of cladding are assembled into
2032 type button cells carry out electro-chemical test, and Fig. 5, Fig. 6 are respectively the multiplying power and cycle performance comparison of two kinds of materials.Wherein not
Charge and discharge under the stratiform richness lithium ion battery positive electrode different multiplying (0.2C, 0.5C, 1C, 2C, 5C) of cladding, it is corresponding to put
Electric specific capacity is respectively 235.8,227.1,220.6,209.8,199.4mAh/g.5C recycles 50 weeks capacity retention ratios
82.6%.The method that this patent provides obtains Sc2O3Cladding stratiform richness lithium ion battery positive electrode different multiplying (0.2C,
0.5C, 1C, 2C, 5C) under charge and discharge, corresponding specific discharge capacity is respectively 251.3,244.0,240.7,236.1,
228.9mAh/g.It is 95.4% that 5C, which recycles 50 weeks capacity retention ratios,.
Claims (6)
1. a kind of metallic element adulterates manganese base lithium ion cell positive material and the preparation method to its coating modification, feature exist
In, doping of the metallic element to manganese base lithium ion cell positive material is carried out using the coprecipitation method of one ethanol system of water, it is sharp
High stability oxide is carried out to the cladding of positive electrode with water-ethanol system liquid phase method.The following steps are included:
(1) it is weighed accordingly in the ratio between the amount of manganese base lithium ion cell positive material and the corresponding substance of doped metallic elements ratio
Metallic element acetate, be dissolved in the mixed solution of water and ethyl alcohol and being stirred, acetate total concentration be 0.01-
0.5mo1/L, wherein the volume ratio of second alcohol and water is 0-20:1；
(2) oxalic acid is dissolved in the mixed solution of deionized water and ethyl alcohol, concentration of oxalic acid 0.1-0.5mol/L, second alcohol and water
Volume ratio is 0-20:1；
(3) the acetic acid mixed salt solution that step (1) obtains is quickly poured into the oxalic acid mixed solution that step (2) obtains, oil bath
Stirring, evaporation, obtain oxalate precursor；
(4) oxalate precursor is preheated under the conditions of 450 DEG C, is then calcined under the conditions of 800-850 DEG C to get metallic element
Adulterate manganese base lithium ion cell positive material.
(5) according to Sc2O3The amount for accounting for positive electrode mass fraction 0.5-2% weighs Sc (NO3)3·6H20, it is dissolved in deionized water, is matched
The scandium nitrate solution that concentration is 0.01-0.1mo1/L is made, it is molten that the positive electrode powder that step 4 obtains is distributed to scandium nitrate
In liquid, 0.5h is stirred at room temperature with magnetic stirring apparatus, it is dry, obtain Sc2O3The forerunner of coated lithium ion battery positive electrode
Body；By Sc2O3The presoma of coated lithium ion battery positive electrode is heat-treated 5h at 400-600 DEG C and mixes to get to metal ion
Miscellaneous modification and the manganese base lithium ion cell positive material coated using high stability oxide.
2. the preparation method of metallic element doping manganese base lithium ion cell positive material according to claim 1, feature
It is, step (1) the manganese base lithium ion cell positive material includes the ternary material LiNi of stratiformXCo1-X-yMnyO2(x, y table
Show constituent content), stratiform richness Li material xLi2MnO3·(1-x)LiNi1/3Mn1/3Co1/3O2(0 < x < 0.5), spinelle
LiNi0.5Mn1.5O4, spinelle LiMn2O4。
3. the preparation method of metallic element doping manganese base lithium ion cell positive material according to claim 1, feature
Be: the doped metallic elements of the step (1) are at least one of Fe, Ti, Cr, Al, Mg, Mo, Co, Ni, doping way
The metallic flat for being manganese base lithium ion cell positive material in addition to Li or dibit doping, the model of the ratio a of the doped chemical
Enclose for O < a≤0.5m, wherein m for institute's doped chemical position in Mn-based material ratio.
4. the preparation method of metallic element doping manganese base lithium ion cell positive material according to claim 1, feature
It is, step (4) preheating time is 8-10h, and the calcination time is 15-20h, and heating rate is 5 DEG C/min.
5. the preparation method of metallic element doping manganese base lithium ion cell positive material according to claim 1, feature
It is, step (3) mixing time is 5h, evaporation conditions are as follows: be evaporated to solvent under the conditions of 90 DEG C and volatilize completely.
6. Sc according to claim 12O3Coat the preparation method of manganese base lithium ion cell positive material, which is characterized in that
Drying condition in the step (5) are as follows: dry 10h in 80-120 DEG C of baking oven.Sintering temperature is 800-900 DEG C, sintering time 12-
20h。
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| CN112340786A (en) * | 2020-11-06 | 2021-02-09 | 惠州亿纬锂能股份有限公司 | Modification method of positive electrode material, modified positive electrode material and lithium ion battery |
| CN113148969A (en) * | 2021-04-08 | 2021-07-23 | 江苏力泰锂能科技有限公司 | Doped lithium iron manganese phosphate-carbon composite material and preparation method thereof |
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| CN106129370A (en) * | 2016-08-25 | 2016-11-16 | 合肥国轩高科动力能源有限公司 | The manganio anode material for lithium-ion batteries of high stability Scia cladding and preparation method |
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| CN105958052A (en) * | 2016-05-29 | 2016-09-21 | 合肥国轩高科动力能源有限公司 | Preparation method for metal-element-doped manganese-based positive electrode material for lithium ion battery |
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| CN112340786A (en) * | 2020-11-06 | 2021-02-09 | 惠州亿纬锂能股份有限公司 | Modification method of positive electrode material, modified positive electrode material and lithium ion battery |
| CN113148969A (en) * | 2021-04-08 | 2021-07-23 | 江苏力泰锂能科技有限公司 | Doped lithium iron manganese phosphate-carbon composite material and preparation method thereof |
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