CN108832089A - A kind of molybdenum disulfide cladding nickle cobalt lithium manganate composite material and preparation method and application - Google Patents

A kind of molybdenum disulfide cladding nickle cobalt lithium manganate composite material and preparation method and application Download PDF

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CN108832089A
CN108832089A CN201810584941.2A CN201810584941A CN108832089A CN 108832089 A CN108832089 A CN 108832089A CN 201810584941 A CN201810584941 A CN 201810584941A CN 108832089 A CN108832089 A CN 108832089A
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lithium manganate
nickle cobalt
cobalt lithium
composite material
molybdenum disulfide
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胡国荣
亓先跃
杜柯
彭忠东
曹雁冰
薛智宸
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Central South University
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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
    • 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
    • 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
    • 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
    • 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
    • H01M4/624—Electric conductive fillers
    • 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
    • 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
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    • Y02E60/10—Energy storage using batteries

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Abstract

The present invention relates to a kind of molybdenum disulfide cladding nickle cobalt lithium manganate composite material and preparation methods and application, the composite material to be made of core material and clad, and the core material is nickle cobalt lithium manganate, chemical formula LiNixCoyMn1‑x‑yO2, wherein 0<=x, y<=1；The clad is MoS2.Preparation method is：Four thio ammonium molybdate is added in solvent, is stirred in 40~80 DEG C, obtains dispersion liquid；Nickle cobalt lithium manganate is added into dispersion liquid and obtains mixed liquor, it is dry to be stirred continuously until that solvent-based inks dry is placed in vacuum drying oven, mixture is sintered under protective atmosphere and coats nickle cobalt lithium manganate composite material to get to molybdenum disulfide.Preparation process of the present invention is simple, easy to operate, and element utilization rate is high.Applied in lithium ion battery, having the characteristics that coulombic efficiency is high for the first time, stable cycle performance and high rate performance are excellent.

Description

A kind of molybdenum disulfide cladding nickle cobalt lithium manganate composite material and preparation method and application
Technical field
The invention belongs to technical field of lithium ion, and in particular to a kind of molybdenum disulfide cladding nickle cobalt lithium manganate composite wood Material and its preparation method and application.
Background technique
On March 1st, 2017, Ministry of Industry and Information, the Committee of Development and Reform, the Department of Science and Technology and four ministries and commissions of the Ministry of Finance, which combine, to print and distribute《Promote automobile dynamic Power battery industry developing activity scheme》, propose that the year two thousand twenty electrokinetic cell system specific energy reaches 260Wh/kg (its in properties of product Middle battery cell energy density reaches 350Wh/kg, and rear to have supplement 350Wh/kg again be target 300Wh/kg is index), cost drop To 1 yuan/Wh hereinafter, power battery monomer specific energy in 2025 reaches the target of 500Wh/kg.The appearance of these policies is obviously The high specific energy of power battery and it is cost effective specify direction, while also implying that ternary material will be in following very long one section Emphasis in time as pertinent art's concern.
The nickelic system's tertiary cathode material of lithium ion battery is considered due to possessing the advantages that energy density is high, cost is relatively low The next-generation high energy lithium ion cell positive electrode of most prospect, and become be applied to electric car in hot spot material it One.However nickelic system's ternary material still has some problems urgently to be resolved, first：High-nickel material surface residual lithium electrode easily with It is high to cause surface residual alkali amount for water and carbon dioxide reaction in air, to increase irreversible capacity loss, deteriorate cyclicity Energy.Second：Due to the corrosion for the hydrogen fluoride that electrolyte decomposition generates, nickel, cobalt, manganese transition metal can be molten from electrode in ternary material Solution is into electrolyte.Third：In battery charge and discharge process, along with the generation of side reaction, the structure of positive electrode active materials will It will receive certain destruction.
Surface modification is a kind of method for improving nickelic tertiary cathode material performance effective at present.Material carries out table Face is modified, and the protective layer of formation can keep apart the active material in material with electrolyte, so as to substantially reduce Side reaction at electrode/electrolyte interface, for example, reducing the precipitation of transition metal, forming thinner surface protection film, reduce oxygen The precipitation etc. of atom improves electrochemical stability, extends so that structure of the material in charge and discharge process be inhibited to destroy Cycle life.
Traditional cladding substance such as oxide etc. does not have good electronic conductivity or ionic conductivity, main body after cladding Material has the defects of a degree of capacity reduces, and causes covered effect that can have a greatly reduced quality.
Summary of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is to provide one kind to be evenly coated, chemical stability is good, from Son-electronic conductivity high molybdenum disulfide cladding nickle cobalt lithium manganate composite material and preparation method and application.
To achieve the goals above, the present invention provides the following technical solutions：
A kind of molybdenum disulfide cladding nickle cobalt lithium manganate composite material, the composite material is by core material and clad structure At the core material is nickle cobalt lithium manganate, chemical formula LiNixCoyMn1-x-yO2, wherein 0<=x, y<=1, the cladding Layer is MoS2。
Preferred scheme, in the composite material, the mass fraction of clad is 0.5~10wt%.
As a further preference, in the composite material, the mass fraction of clad is 2~6wt%.
Inventors have found that the quality of cladding substance has a certain impact to covered effect, the excessively high meeting of quality of substance is coated Change the structure of covering material, it is too low, it cannot completely or uniformly coat.
The partial size of preferred scheme, the molybdenum disulfide cladding nickle cobalt lithium manganate composite material is 1~20 μm.
Preferred scheme, the clad with a thickness of 5~100nm.
As a further preference, the clad with a thickness of 10~50nm.
Preferred scheme, the core material are nickle cobalt lithium manganate, chemical formula LiNi0.5Co0.2Mn0.3O2、 LiNi0.6Co0.2Mn0.2O2、LiNi0.8Co0.1Mn0.1O2One of.
A kind of preparation method of molybdenum disulfide cladding nickel cobalt lithium manganate, includes the following steps：
By four thio ammonium molybdate ((NH4)2MoS4) be added in solvent, it is stirred in 40~80 DEG C, obtains dispersion liquid；To dispersion Nickle cobalt lithium manganate is added in liquid and obtains mixed liquor, crystallized product is obtained to mixed liquor evaporative crystallization, by crystallized product in protection gas It is sintered under atmosphere and coats nickle cobalt lithium manganate (LiNi to get to molybdenum disulfidexCoyMn1-x-yO2@MoS2, wherein 0<=x, y<=1) multiple Condensation material.
Preferred scheme, by four thio ammonium molybdate ((NH4)2MoS4) be added solvent in, at 50~70 DEG C stir 5~ 30min obtains dispersion liquid.
As a further preference, by four thio ammonium molybdate ((NH4)2MoS4) be added in solvent, in 50~70 DEG C of water-bath Heating is lower to stir 10~20min, obtains dispersion liquid.
Inventors have found that the solution temperature of four thio ammonium molybdate has centainly the performance of final resulting composite positive pole Influence, temperature it is too low dispersion unevenly cause the subsequent clad that is formed by uneven, temperature is excessively high to lead to subsequent composite wood Material is formed by the case where clad generation falls off.
Preferred scheme, the solvent are selected from ethyl alcohol or ethylene glycol.
Preferred scheme, in the dispersion liquid, the mass fraction of four thio ammonium molybdate is 0.5~5wt%.
As a further preference, in the dispersion liquid, the mass fraction of four thio ammonium molybdate is 0.65~1.95wt%.
Preferred scheme, the partial size of the nickle cobalt lithium manganate are 1~20 μm.
Preferred scheme, in the mixture, the mass fraction of four thio ammonium molybdate is 0.81~16.25wt%.
Preferred scheme, in the mixture, the mass fraction of four thio ammonium molybdate is 3.25~9.75wt%.
Preferred scheme is slowly added to nickle cobalt lithium manganate into dispersion liquid and obtains mixed liquor.Described in the present invention is slow Slowly refer to and nickle cobalt lithium manganate is added within certain duration, so that the nickle cobalt lithium manganate being continuously added into can when contacting dispersion liquid To scatter immediately, the phenomenon that being deposited in liquid surface without solid powder.
Inventors have found that if being quickly poured into nickle cobalt lithium manganate can have a certain impact to the uniformity of clad.
The concrete operations of preferred scheme, the evaporative crystallization are that mixed liquor first stirs at 50~70 DEG C complete to solvent Then portion's volatilization carries out vacuum drying and obtains crystallized product.
As a further preference, the vacuum drying temperature is 80~150 DEG C.
As further preferably, the vacuum drying temperature is 90~120 DEG C.
Preferred scheme, the temperature of the sintering are 350~550 DEG C.As a further preference, the temperature of the sintering It is 400~500 DEG C.
As a further preference, the time of sintering is 4~12h.
As a further preference, the sintering time is 6~10h.
Preferred scheme, the protective atmosphere are argon gas or nitrogen.
A kind of application of molybdenum disulfide cladding nickle cobalt lithium manganate composite material of the present invention, coats nickel cobalt mangaic acid for molybdenum disulfide Lithium composite material is applied in lithium ion battery as anode material for lithium-ion batteries.
Compared with prior art, advantage of the invention is that：
The present invention is aided with low-temperature sintering by simple liquid phase method and is prepared for the modified positive ternary material in molybdenum disulfide surface Material.Two-dimentional transition metal chalcogenide MoS2It is a kind of stratiform two-dimensional structure similar to graphene, it is by two S layers and one The ABA sandwich layered structure of a Mo layers of composition, by Van der Waals force interaction between adjacent layer, this feature structure can be with A stable channel, therefore MoS are provided for the insertion and abjection of lithium ion2Coating can provide additional lithium ion deintercalation position Point, to reduce the irreversible capacitance loss of ternary material.In addition, MoS2Also have chemical stability, configuration flexibility and The advantages that certain conductivity, can be used as " highway " for transmitting electronics and lithium ion between electrode and electrolyte, adopt The electric conductivity and the structure change in alleviation charge and discharge process, energy of ternary material can be increased by carrying out surface modification with molybdenum disulfide Effectively optimize interfacial electrochemistry reaction environment, improves the coulombic efficiency for the first time of ternary material, cyclical stability and forthright again The certain conductivity of energy.Preparation process of the present invention is simple, easy to operate, and element utilization rate is high, the electrochemistry of positive ternary material Performance significantly improves.
Detailed description of the invention
Fig. 1 is LiNi in embodiment 10.8Co0.1Mn0.1O2Ternary material and LiNi0.8Co0.1Mn0.1O2@MoS2Composite wood The scanning of material and transmission electron microscope picture；
Wherein, Fig. 1 (a) is LiNi0.8Co0.1Mn0.1O2The scanning electron microscope (SEM) photograph of ternary material, Fig. 1 (b) are LiNi0.8Co0.1Mn0.1O2@MoS2The scanning electron microscope (SEM) photograph of composite material, Fig. 1 (c) are LiNi0.8Co0.1Mn0.1O2Ternary material it is saturating Electron microscope is penetrated, Fig. 1 (d) is LiNi0.8Co0.1Mn0.1O2@MoS2The transmission electron microscope picture of composite material,
Fig. 2 is LiNi before modified in embodiment 10.8Co0.1Mn0.1O2Ternary material and modified gained LiNi0.8Co0.1Mn0.1O2@MoS2Circulation of the composite material under 1C current density, in 25 DEG C and 2.8~4.3V voltage range is bent Line chart.
Fig. 3 is the LiNi before modified of embodiment 10.8Co0.1Mn0.1O2Ternary material and modified gained LiNi0.8Co0.1Mn0.1O2@MoS2Circulation of the composite material under 1C current density, in 55 DEG C and 2.8~4.3V voltage range is bent Line chart.
Fig. 4 is the LiNi before modified of embodiment 20.6Co0.2Mn0.2O2Ternary material and modified gained LiNi0.6Co0.2Mn0.2O2@MoS2Circulation of the composite material under 1C current density, in 25 DEG C and 2.8~4.3V voltage range is bent Line chart.
Fig. 5 is the LiNi before modified of embodiment 30.5Co0.2Mn0.3O2Ternary material and modified gained LiNi0.5Co0.2Mn0.3O2@MoS2Circulation of the composite material under 1C current density, in 25 DEG C and 2.8~4.3V voltage range is bent Line chart.
Specific embodiment
Following embodiment is intended to illustrate invention rather than limitation of the invention further.
Embodiment 1：
By 0.325g four thio ammonium molybdate ((NH4)2MoS4) be dissolved in 32.5g dehydrated alcohol, 50 DEG C of heating water bath stirrings 10 Minute, obtain dispersion liquid；(10 μm of average grain diameter, 10g) LiNi is added into dispersion liquid0.8Co0.1Mn0.1O2Ternary material obtains Mixed liquor after keeping 50 DEG C of water-baths to be stirred continuously until solvent-based inks dry, products therefrom is dried in vacuo at 90 DEG C and is mixed Object, in being sintered 6 hours under 400 DEG C, argon atmosphere to get LiNi0.8Co0.1Mn0.1O2@MoS2Composite material, wherein MoS2's Covering amount is 2wt%.
Fig. 1 is LiNi in embodiment 10.8Co0.1Mn0.1O2Ternary material and LiNi0.8Co0.1Mn0.1O2@MoS2Composite wood The scanning of material and transmission electron microscope picture；Modified material morphology does not change substantially it can be seen from Fig. 1 (a) and (b), is class Spheric granules illustrates that cladding process will not damage the whole pattern of material；It can be seen from the figure that coating the one of preceding material surface Secondary grain corner is clearly demarcated, but can be seen that the corner angle of material surface primary particle become blurred or disappear under high magnification, table There are many fine particles in face, illustrates in LiNi0.8Co0.1Mn0.1O2Positive electrode deposited layer of substance.It can from Fig. 1 (c) To find out, the surface of uncoated material is more smooth, spacing of lattice 0.473nm, corresponds to LiNi0.8Co0.1Mn0.1O2Material 003 face.From Fig. 1 (d) it can be seen that material surface is uniformly distributed the clad of about 14-16nm thickness, inner layer consistent with SEM result The spacing of lattice of material is 0.473nm, and corresponding to 003 face for 811 materials, the interplanar distance of clad is 0.616nm, is met MoS2002 face of material illustrates that the surface of material of main part is deposited with uniform MoS2Clad.
Fig. 2 be before modified after under positive ternary material 1C current density, 25 DEG C with the circulation in 2.8~4.3V voltage range Curve graph.As shown in Figure 2, after unmodified material circulation 100 encloses, the capacity of material is from 183.9mAhg-1It decays to 152.5mAh·g-1, capacity retention ratio 82.9%, and after modified material circulation 100 encloses, the capacity of material from 185.8mAh·g-1Decay to 170.1mAhg-1, capacity retention ratio 91.6%, hence it is evident that be higher than unmodified.
Fig. 3 be before modified after under positive ternary material 1C current density, 55 DEG C with the circulation in 2.8~4.3V voltage range Curve graph.From the figure 3, it may be seen that after modified material recycles 100 times at 1C, the capacity of material is from 199.7mAhg-1It decays to 157.9mAh·g-1, capacity retention ratio 79.1%, and the discharge capacity of unmodified material is from 197.3mAhg-1Decaying rapidly To 103.2mAhg-1, capacity retention ratio only has 52.3%.
Embodiment 2：
By 0.65g four thio ammonium molybdate ((NH4)2MoS4) be dissolved in 100g ethylene glycol solvent, 60 DEG C of heating water bath stirrings 15 Minute, obtain dispersion liquid；(12 μm of average grain diameter, 10g) addition LiNi are added into dispersion liquid0.6Co0.2Mn0.2O2Ternary material, It keeps 60 DEG C of water-baths to be stirred continuously until that solvent all volatilizees, gained mixture is dried in vacuo at 100 DEG C, then 450 DEG C, be sintered 8 hours to get molybdenum disulfide (MoS under argon atmosphere2) the modified LiNi in surface0.6Co0.2Mn0.2O2@MoS2Composite wood Expect, wherein MoS2Covering amount be 4wt%.
Fig. 4 be before modified after under positive ternary material 1C current density, 25 DEG C with the circulation in 2.8~4.3V voltage range Curve graph, as shown in Figure 4, after material before modified recycles 100 times at 1C, the capacity of material is from 173.1mAhg-1It declines rapidly Reduce to 143.9mAhg-1, capacity retention ratio is only 83.1%, and 100 discharge capacities of modified material circulation from 173.7mAh·g-1Decay to 158.4mAhg-1, capacity retention ratio 91.2%.
Embodiment 3：
By 0.975g four thio ammonium molybdate ((NH4)2MoS4) be dissolved in 50g alcohol solvent, 70 DEG C of heating water baths stir 20 points Clock obtains dispersion liquid；(11 μm of average grain diameter, 10g) LiNi is added into dispersion liquid0.5Co0.2Mn0.3O2Ternary material keeps 70 After DEG C water-bath is stirred continuously until solvent-based inks dry, gained mixture is dried in vacuo at 120 DEG C, then in 500 DEG C, nitrogen 10 hours are sintered under atmosphere to get molybdenum disulfide (MoS2) the modified LiNi in surface0.5Co0.2Mn0.3O2@MoS2Composite material, Middle MoS2Covering amount be 6wt%.
Fig. 5 be before modified after under positive ternary material 1C current density, 25 DEG C with the circulation in 2.8~4.3V voltage range Curve graph, as shown in Figure 5, after material before modified recycles 100 times at 1C, the capacity of material is from 159.4mAhg-1It declines rapidly Reduce to 129.6mAhg-1, capacity retention ratio is only 81.3%, and 100 discharge capacities of modified material circulation from 160.2mAh·g-1Decay to 145.1mAhg-1, capacity retention ratio 90.6%.
Comparative example 1：
Compared with Example 1, difference is, bath temperature is changed to 100 DEG C by 50 DEG C.Unmodified material circulation 100 encloses Afterwards, the capacity of material is from 183.9mAhg-1Decay to 152.5mAhg-1, capacity retention ratio 82.9%, and it is modified After material circulation 100 encloses, the capacity of material is from 182.1mAhg-1Decay to 142.6mAhg-1, capacity retention ratio is 78.3%, hence it is evident that lower than the 91.6% of embodiment 1.
Comparative example 2：
Compared with Example 2, difference is, argon atmosphere is changed to air atmosphere.Material before modified recycles 100 at 1C After secondary, the capacity of material is from 173.1mAhg-1143.9mAhg is decayed to rapidly-1, capacity retention ratio is only 83.1%, and 100 discharge capacities of modified material circulation are from 171.9mAhg-1Decay to 139.6mAhg-1, capacity retention ratio is 81.2%, hence it is evident that lower than the 91.2% of embodiment 2.
Comparative example 3：
Compared with Example 3, difference is, sintering temperature is changed to 250 DEG C by 500 DEG C.Material before modified is followed at 1C After ring 100 times, the capacity of material is from 173.1mAhg-1143.9mAhg is decayed to rapidly-1, capacity retention ratio is only 83.1%, and 100 discharge capacities of modified material circulation are from 170.7mAhg-1Decay to 136.4mAhg-1, capacity Conservation rate is 79.9%, hence it is evident that lower than the 90.6% of embodiment 3.

Claims (10)

1. a kind of molybdenum disulfide coats nickle cobalt lithium manganate composite material, it is characterised in that：The composite material by core material and Clad is constituted, and the core material is nickle cobalt lithium manganate, chemical formula LiNixCoyMn1-x-yO2, wherein 0<=x, y<= 1；, the clad is MoS2。
2. a kind of molybdenum disulfide according to claim 1 coats nickle cobalt lithium manganate composite material, it is characterised in that：It is described multiple In condensation material, the mass fraction of clad is 0.5~10wt%.
3. a kind of molybdenum disulfide according to claim 1 coats nickle cobalt lithium manganate composite material, it is characterised in that：
The partial size of the molybdenum disulfide cladding nickle cobalt lithium manganate composite material is 1~20 μm.
4. preparing a kind of molybdenum disulfide cladding nickle cobalt lithium manganate composite material as claimed in any one of claims 1 to 3, feature It is, includes the following steps：
Four thio ammonium molybdate is added in solvent, is stirred in 40~80 DEG C, obtains dispersion liquid；Nickel cobalt mangaic acid is added into dispersion liquid Lithium obtains mixed liquor, obtains crystallized product to mixed liquor evaporative crystallization, crystallized product is sintered under protective atmosphere to get to two Molybdenum sulfide coats nickle cobalt lithium manganate composite material.
5. a kind of preparation method of molybdenum disulfide cladding nickle cobalt lithium manganate composite material according to claim 4, feature It is：
Four thio ammonium molybdate is added in solvent, 5~30min is stirred at 50~70 DEG C, obtains dispersion liquid.
6. a kind of preparation method of molybdenum disulfide cladding nickle cobalt lithium manganate composite material according to claim 4, feature It is：
The solvent is selected from ethyl alcohol or ethylene glycol.
7. a kind of preparation method of molybdenum disulfide cladding nickle cobalt lithium manganate composite material according to claim 4, feature It is：
In the dispersion liquid, the mass fraction of four thio ammonium molybdate is 0.5~5wt%.
8. a kind of preparation method of molybdenum disulfide cladding nickle cobalt lithium manganate composite material according to claim 4, feature It is：
The partial size of the nickle cobalt lithium manganate is 1~20 μm.
9. a kind of preparation method of molybdenum disulfide cladding nickle cobalt lithium manganate composite material according to claim 4, feature It is：The temperature of the sintering is 350~550 DEG C, and the sintering time is 4~12h.
10. a kind of application of molybdenum disulfide cladding nickle cobalt lithium manganate composite material as claimed in any one of claims 1 to 3, It is characterized in that：The described in any item molybdenum disulfide cladding nickle cobalt lithium manganate composite materials of claims 1 to 3 are applied to lithium ion In battery.
CN201810584941.2A 2018-06-08 2018-06-08 A kind of molybdenum disulfide cladding nickle cobalt lithium manganate composite material and preparation method and application Pending CN108832089A (en)

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CN110071278A (en) * 2019-04-26 2019-07-30 欣旺达电动汽车电池有限公司 A kind of nickelic tertiary cathode material of the remover containing active oxygen and preparation method thereof
CN111326737A (en) * 2018-12-13 2020-06-23 现代自动车株式会社 Cathode active material for lithium secondary battery, method of manufacturing the same, cathode including the cathode active material, and lithium secondary battery
CN112289998A (en) * 2020-10-30 2021-01-29 合肥国轩高科动力能源有限公司 Ternary cathode material with double-layer coating structure on surface and preparation method thereof
CN112614967A (en) * 2020-12-17 2021-04-06 河南师范大学 Preparation method of lithium ion battery anode material and product thereof
CN113745498A (en) * 2021-08-12 2021-12-03 深圳道童新能源有限公司 Vapor deposition coating MoSe2Ternary positive electrode material and preparation method thereof
CN114566636A (en) * 2021-12-29 2022-05-31 中国科学院过程工程研究所 Lithium-rich manganese-based positive electrode material and preparation method and application thereof
CN114976007A (en) * 2022-06-08 2022-08-30 中国科学院化学研究所 Method for controllably constructing sulfide coating layer
CN115321614A (en) * 2022-09-21 2022-11-11 合肥国轩高科动力能源有限公司 Cathode material for improving DCR of lithium ion battery and preparation method thereof
WO2023108397A1 (en) * 2021-12-14 2023-06-22 宁德新能源科技有限公司 Positive electrode active material, electrochemical device, and electronic device

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CN111326737A (en) * 2018-12-13 2020-06-23 现代自动车株式会社 Cathode active material for lithium secondary battery, method of manufacturing the same, cathode including the cathode active material, and lithium secondary battery
CN109768252A (en) * 2019-01-10 2019-05-17 合肥国轩高科动力能源有限公司 Modified NCM622 film cathode material and preparation and application thereof
CN109768252B (en) * 2019-01-10 2020-07-10 合肥国轩高科动力能源有限公司 Modified NCM622 film cathode material and preparation and application thereof
CN110071278A (en) * 2019-04-26 2019-07-30 欣旺达电动汽车电池有限公司 A kind of nickelic tertiary cathode material of the remover containing active oxygen and preparation method thereof
CN112289998B (en) * 2020-10-30 2021-10-15 合肥国轩高科动力能源有限公司 Ternary cathode material with double-layer coating structure on surface and preparation method thereof
CN112289998A (en) * 2020-10-30 2021-01-29 合肥国轩高科动力能源有限公司 Ternary cathode material with double-layer coating structure on surface and preparation method thereof
CN112614967A (en) * 2020-12-17 2021-04-06 河南师范大学 Preparation method of lithium ion battery anode material and product thereof
CN113745498A (en) * 2021-08-12 2021-12-03 深圳道童新能源有限公司 Vapor deposition coating MoSe2Ternary positive electrode material and preparation method thereof
WO2023108397A1 (en) * 2021-12-14 2023-06-22 宁德新能源科技有限公司 Positive electrode active material, electrochemical device, and electronic device
CN114566636A (en) * 2021-12-29 2022-05-31 中国科学院过程工程研究所 Lithium-rich manganese-based positive electrode material and preparation method and application thereof
CN114566636B (en) * 2021-12-29 2023-11-17 中国科学院过程工程研究所 Lithium-rich manganese-based positive electrode material and preparation method and application thereof
CN114976007A (en) * 2022-06-08 2022-08-30 中国科学院化学研究所 Method for controllably constructing sulfide coating layer
CN114976007B (en) * 2022-06-08 2024-02-20 中国科学院化学研究所 Method for controllably constructing sulfide coating layer
CN115321614A (en) * 2022-09-21 2022-11-11 合肥国轩高科动力能源有限公司 Cathode material for improving DCR of lithium ion battery and preparation method thereof
CN115321614B (en) * 2022-09-21 2023-10-31 合肥国轩高科动力能源有限公司 Positive electrode material for improving DCR of lithium ion battery and preparation method thereof

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Application publication date: 20181116