CN110752367A - High-nickel anode material with stable storage in atmosphere, preparation method and battery thereof - Google Patents

High-nickel anode material with stable storage in atmosphere, preparation method and battery thereof Download PDF

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CN110752367A
CN110752367A CN201910858623.5A CN201910858623A CN110752367A CN 110752367 A CN110752367 A CN 110752367A CN 201910858623 A CN201910858623 A CN 201910858623A CN 110752367 A CN110752367 A CN 110752367A
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conductive agent
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赵金保
孔祥邦
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Xiamen University
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Xiamen 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
    • H01M4/48—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
    • 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
    • H01M4/52—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
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • 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
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/028—Positive electrodes
    • 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 high-nickel anode material capable of being stably stored in the atmosphere, a preparation method and a battery thereof. The gaps between primary particles of the high-nickel anode material are filled with fine conductive agent particles in a mixed manner, and the high-nickel anode material is prepared by blending the fine conductive agent particles and the anode material and then calcining the mixture at 300-600 ℃. The high-nickel anode material has excellent storage performance, is used for power lithium ion batteries, obviously improves the tolerance capability of storing in the air, does not need to be subjected to sealing and packaging treatment under the condition of storing for a certain time, and greatly saves the production cost.

Description

High-nickel anode material with stable storage in atmosphere, preparation method and battery thereof
Technical Field
The invention belongs to the field of electrochemistry, and particularly relates to a high-nickel anode material with stable storage in the atmosphere, a preparation method and a battery thereof.
Background
With the continuous development of society, people have an increasing demand for energy, and energy structures mainly based on traditional fossil energy such as coal, oil and natural gas face a serious challenge. Among many energy storage devices, lithium ion batteries have attracted attention because of their advantages such as high energy density and power density, high output voltage, long service life, high safety, and environmental friendliness.
Meanwhile, the trend of replacing the traditional fuel vehicles by new energy vehicles is difficult to block, and the rules and the years for gradually forbidding selling the traditional fuel vehicles are set by many countries in the world. One of the main components in the new energy automobile is a storage/energy supply assembly, and a lithium ion battery is the first choice of the new energy automobile as the most advantageous storage device. Therefore, the lithium ion battery has wide development space in the field of power batteries.
At present, in the field of power lithium ion batteries, the specific discharge capacity of a positive electrode material is obviously lower than that of a negative electrode material, so that the positive electrode material becomes an important factor for limiting the capacity of the power lithium ion battery. However, with the increasing demand of people for the endurance mileage of electric vehicles, the capacity of the anode material is increased only insignificantly.
At present, lithium iron phosphate, ternary cathode materials and the like are mainly used as cathode materials for power lithium ion batteries, wherein the ternary materials are more and more concerned by people due to the advantage of high specific capacity. However, as the Ni content in the ternary material increases, the thermal stability, the cycling stability and the storage stability in air of the material decrease, and particularly when the ternary material is exposed to air for a long time, the ternary material is likely to react with substances such as moisture and carbon dioxide in the air due to the existence of residual alkali on the surface of the ternary material, so that the structure of the material is damaged, and the electrochemical performance is also significantly reduced. During large-scale production, transportation and assembly, the production material is inevitably exposed to air, so that the improvement of the storage stability of the ternary material in the air is necessary.
Through continuous experimental research, the inventor finds that when the ternary material is stored in the air for a long time, a large amount of impurities are preferentially generated among gaps of primary particles, so that the performance of the ternary material is further deteriorated. In order to solve the problem of exposure of the ternary material, manufacturers often coat an isolation layer on the surface of the material to reduce direct contact between the material and air, but the method reduces the specific capacity of the ternary material and affects the capacity advantage of the ternary material. In addition, in the prior art, after impurities on the surface of the material are generated, the material is cleaned by a method of water washing and secondary sintering, but the process of water washing often causes the separation of lithium in the ternary material and causes instability in material performance, and although the method can recover the material performance to a certain extent, the method also needs complicated process steps and greatly increases the cost.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a high-nickel anode material with stable storage in the atmosphere, a preparation method and a battery thereof.
One of the technical schemes adopted by the invention for solving the technical problems is as follows: the high-nickel cathode material is a ternary material, conductive agent particles are embedded in gaps of primary particles of the ternary material, the particle size of the conductive agent particles is smaller than that of the primary particles, and the hardness of the conductive agent particles is smaller than that of the primary particles.
In a preferred embodiment of the present invention, the ternary material is a layered material LiNixCoyMnzO2Wherein x + y + z is 1, x is more than or equal to 0.5 and less than or equal to 1, y is more than or equal to 0 and less than or equal to 0.5, and z is more than or equal to 0 and less than or equal to 0.5; or the like, or, alternatively,
the ternary material is a layered material LiNixCoyAlzO2Wherein x + y + z is 1, x is more than or equal to 0.8 and less than or equal to 1, y is more than or equal to 0 and less than or equal to 0.2, and z is more than 0 and less than or equal to 0.2; or the like, or, alternatively,
the ternary material is a layered material aLi2MnO3·(1-a)LiNixCoyMnzO2Wherein x + y + z is 1, a is more than 0 and less than 1, x is more than or equal to 0.5 and less than or equal to 1, y is more than or equal to 0 and less than or equal to 0.5, and z is more than or equal to 0 and less than or equal to 0.5.
In a preferred embodiment of the present invention, the mass ratio of the conductive agent particles to the ternary material is 0.5-10: 100. When the proportion of the added conductive agent is less than 0.5%, the storage performance of the ternary material is difficult to be effectively improved, and when the proportion of the added conductive agent is more than 10%, the specific capacity of the ternary material is reduced.
In a preferred embodiment of the present invention, the conductive agent particles are conductive agents having lewis acidic groups on the surfaces thereof.
In a preferred embodiment of the present invention, the conductive agent includes at least one of conductive graphite, acetylene black, carbon nanotubes, Super-P, a pyrolytic carbon-based conductive agent, a coke-based conductive agent, a glassy carbon-based conductive agent, a sintered body of an organic polymer compound, mesocarbon microbeads, or amorphous carbon.
The ternary material is a secondary particle material formed by stacking primary particles, and the surface of a common conductive agent such as acetylene black and the like usually contains Lewis acid groups such as-COOH, -OH and the like, so that residual alkali on the surface of the ternary material can be neutralized to a certain degree; meanwhile, small conductive agent particles can be well filled in gaps among primary particles of the ternary material, and impurities such as moisture, carbon dioxide and the like in the atmosphere can be prevented from entering the gaps among the particles.
The second technical scheme adopted by the invention for solving the technical problems is as follows: the preparation method of the high-nickel anode material capable of being stably stored in the atmosphere is provided, and the high-nickel anode material with the conductive agent particles embedded in gaps of primary particles is obtained by uniformly mixing the conductive agent particles and the ternary material according to the mass ratio of 0.5-10: 100, and calcining for 1-2 hours at the temperature of 300-600 ℃.
Because the particle size of the conductive agent is obviously smaller than that of the ternary material, and the hardness of the conductive agent is far smaller than that of the ternary material, small particles of the conductive agent are embedded into gaps of primary particles of the ternary material by utilizing the mutual collision effect of the conductive agent and the ternary material in the blending process, and the bonding force between the conductive agent and the material is enhanced through calcination at a certain temperature, so that the ternary cathode material with excellent storage performance under the atmospheric condition is obtained.
In a preferred embodiment of the present invention, the calcination atmosphere comprises air and inert gases, including nitrogen and argon. Including but not limited to air or inert gases such as nitrogen, argon, etc. at low temperatures and nitrogen, argon, etc. at high temperatures.
The third technical scheme adopted by the invention for solving the technical problems is as follows: the lithium ion battery comprises a positive electrode material, a negative electrode material, an electrolyte and a diaphragm, wherein the positive electrode material adopts the high-nickel positive electrode material which is stable to store in the atmosphere and is disclosed in any one of claims 1-5.
The negative electrode active material of the negative electrode material includes a compound capable of intercalating and deintercalating lithium metal and lithium. For example, alloys of aluminum, silicon, tin, or the like, oxides, carbon materials, or the like can be used as the negative electrode active material. Examples of the oxide include titanium dioxide, and examples of the carbon material include graphite, pyrolytic carbons, cokes, glassy carbons, a fired product of an organic polymer compound, mesophase carbon microbeads, and the like.
The diaphragm comprises a woven film, a non-woven film (non-woven fabric), a microporous film, a composite film, diaphragm paper and a rolled film. For example, a polyolefin microporous membrane such as polyethylene or polypropylene, a ceramic separator membrane obtained by compounding a polyolefin microporous membrane such as polyethylene or polypropylene, or a composite membrane material in which polyvinylidene fluoride (PVDF) is used as a main polymer membrane and cellulose is used as a matrix.
The electrolytic solution includes a nonaqueous solvent (organic solvent). The nonaqueous solvent includes carbonates, ethers, and the like. The carbonate includes cyclic carbonates and chain carbonates, and examples of the cyclic carbonates include ethylene carbonate, propylene carbonate, butylene carbonate, γ -butyrolactone, and sulfur esters (ethylene glycol sulfide, etc.). Examples of the chain carbonate include low-viscosity polar chain carbonates such as dimethyl carbonate, diethyl carbonate and ethyl methyl carbonate, and aliphatic branched carbonates. A mixed solvent of a cyclic carbonate (particularly, ethylene carbonate) and a chain carbonate is particularly preferable. Examples of the ethers include dimethyl ether tetraethylene glycol (TEGDME), ethylene glycol dimethyl ether (DME), 1, 3-Dioxolane (DOL), and the like. As the electrolyte salt used in the nonaqueous electrolytic solution, lithium salts such as lithium perchlorate, organoboron lithium salt, lithium salt of fluorine-containing compound, and lithium imide salt are preferable.
Compared with the background technology, the technical scheme has the following advantages:
1. the modified material is a conductive agent necessary in the preparation process of the battery material, other materials are not introduced in the preparation process, so that side reactions such as capacity reduction and the like are not caused, and the prepared positive electrode material can be adapted to a negative electrode material, a diaphragm, electrolyte and the like of the battery as well as other positive electrode materials.
2. The gaps among the particles of the anode material are filled with the conductive agent with small particle size, so that the direct contact of substances such as moisture, carbon dioxide and the like is prevented, the growth speed of impurities is obviously reduced at the gaps where the impurities are easy to grow originally in the storage process, and the storage performance of the material can be effectively improved.
3. The material of the invention has obviously improved storage performance and obviously improved endurance capacity when stored in the air, so that the material does not need to be sealed and packaged under the condition of being stored for a certain time in industrial production, thereby greatly saving the production cost.
4. The preparation process is simple to operate, only needs dry blending and heating treatment, and is suitable for large-scale production.
Drawings
Fig. 1 is a schematic diagram of a preparation process of the cathode material.
FIG. 2 is a comparison of the mass gain ratios of comparative example 1 and example 1 after 7, 14, 21, 28 days of storage.
FIG. 3 is a comparison of the mass gain ratios of comparative example 2 and example 2 after 7, 14, 21, 28 days of storage.
FIG. 4 is a comparison of the mass gain after 7, 14, 21, 28 days of storage for comparative example 3 and example 3.
FIG. 5 is a comparison of the mass gain ratios after 7, 14, 21, 28 days of storage for comparative example 4 and example 4.
Detailed Description
Example 1
The high nickel cathode material with stable storage in the atmosphere of the embodiment adopts LiNi0.6Co0.2Mn0.2O2Ternary material with commercial conductive agent acetylene embedded in gaps of primary particlesBlack particles.
The preparation of the modified high nickel cathode material of this example includes the following steps:
adding 8 parts by mass of LiNi0.6Co0.2Mn0.2O2The material is mixed with 1 part by mass of commercial conductive agent acetylene black, the mixture is put into a ball mill to be uniformly dispersed for 1 hour, and then the uniformly mixed material is transferred into a tube furnace to be calcined for 1 hour under the condition of Ar atmosphere and 500 ℃, thus obtaining the modified high-nickel anode material.
Example 2
Example 2 differs from example 1 in that: prepared to be modified LiNi0.8Co0.1Mn0.1O2A positive electrode material, 8 parts by mass of LiNi0.8Co0.1Mn0.1O2The material is mixed with 1 part by mass of commercial conductive agent acetylene black, the mixture is put into a ball mill to be uniformly dispersed for 1 hour, and then the uniformly mixed material is transferred into a tube furnace to be calcined for 1 hour under the condition of Ar atmosphere and 500 ℃, thus obtaining the modified anode material.
Example 3
Example 3 differs from example 1 in that: prepared to be modified LiNi0.8Co0.15Al0.05O2A positive electrode material, 8 parts by mass of LiNi0.8Co0.15Al0.05O2The material is mixed with 1 part by mass of commercial conductive agent acetylene black, the mixture is put into a ball mill to be uniformly dispersed for 1 hour, and then the uniformly mixed material is transferred into a tube furnace to be calcined for 1 hour under the condition of Ar atmosphere and 500 ℃, thus obtaining the modified anode material.
Example 4
Example 4 differs from example 1 in that: prepared to be modified LiNi0.9Co0.05Mn0.05O2A positive electrode material, 8 parts by mass of LiNi0.9Co0.05Mn0.05O2The material is mixed with 1 part by mass of commercial conductive agent acetylene black, the mixture is put into a ball mill to be uniformly dispersed for 1 hour, and then the uniformly mixed material is transferred into a tube furnace to be calcined for 1 hour under the condition of Ar atmosphere and 500 ℃, thus obtaining the modified anode material.
Comparative examples 1 to 4
Pure LiNi products corresponding to examples 1 to 4 were used respectively0.6Co0.2Mn0.2O2Material and pure LiNi0.8Co0.1Mn0.1O2Material and pure LiNi0.8Co0.15Al0.05O2Material and pure LiNi0.9Co0.05Mn0.05O2The materials were used as comparative examples 1 to 4.
First, mass gain rate contrast experiment
The experiments were conducted in an accelerated test mode, in which the materials prepared in examples 1 to 4 and the materials prepared in comparative examples 1 to 4 were stored at 55 ℃ and 80% RH (Relative humidity), and the mass gain rates after 7, 14, 21 and 28 days of storage were measured.
As a result, as shown in fig. 2 to 5, the modified positive electrode material had excellent storage properties as compared with the pure material.
In fig. 2, the high nickel ternary material is generally secondary particles formed by stacking primary particles, and the surface of the high nickel ternary material often exists in the presence of residual alkali in the preparation process, so that the high nickel ternary material often reacts with substances such as moisture and carbon dioxide in the air to generate impurities when stored in the atmosphere, and therefore, the weight gain during storage is often directly related to the cracking of the material. The mass gains of comparative example 1 after 7, 14, 21 and 28 days of storage at 55 ℃ and 80% RH are 1.6966%, 2.7744%, 3.5130% and 4.1717%, respectively, and the mass gains of example 1 after 7, 14, 21 and 28 days of storage at 55 ℃ and 80% RH are 0.5967%, 0.8025%, 1.0905% and 1.3786%, respectively, and the mass gain rate of example 1 is significantly lower than that of comparative example 1 under the same conditions.
In FIG. 3, the mass gains of comparative example 2 after 7, 14, 21 and 28 days of storage at 55 ℃ and 80% RH are 2.2314%, 3.0152%, 4.0977% and 4.9025%, respectively, and the mass gains of example 2 after 7, 14, 21 and 28 days of storage at 55 ℃ and 80% RH are 0.6096%, 0.9733%, 1.3214% and 1.9686%, respectively, and the mass gain rate of example 2 is significantly lower than that of comparative example 2 under the same conditions.
In FIG. 4, the mass gains of comparative example 3 after 7, 14, 21 and 28 days of storage at 55 ℃ and 80% RH are 2.1415%, 2.8676%, 3.9714% and 4.7632%, respectively, and the mass gains of example 3 after 7, 14, 21 and 28 days of storage at 55 ℃ and 80% RH are 0.5993%, 0.9632%, 1.2413% and 1.8944%, respectively, and the mass gain rate of example 3 is significantly lower than that of comparative example 3 under the same conditions.
In FIG. 5, the mass gains of comparative example 4 after 7, 14, 21 and 28 days of storage at 55 ℃ and 80% RH are 2.4614%, 3.2157%, 4.5717% and 5.4416%, respectively, and the mass gains of example 4 after 7, 14, 21 and 28 days of storage at 55 ℃ and 80% RH are 0.6213%, 1.1023%, 1.6107% and 2.1234%, respectively, and the mass gain of example 4 is significantly lower than that of comparative example 4 under the same conditions.
Second, first-loop circulation efficiency and specific discharge capacity contrast experiment
The experiment was also conducted in an accelerated test mode, in which the materials prepared in examples 1 to 4 and the materials prepared in comparative examples 1 to 4 were stored at 55 ℃ and 80% RH (Relative humidity), and the first-cycle cycling efficiency and the specific discharge capacity after 7, 14, 21 and 28 days of storage were measured, and the results are shown in the following table:
TABLE 1 comparison of first-pass cycle efficiency for examples and comparative examples
First-round discharge efficiency after storage (%) 7 days 14 days 21 days 28 days
Comparative example 1 72.56 48.06 40.95 34.24
Example 1 79.17 79.08 75.99 73.64
Comparative example 2 60.17 32.15 22.04 11.16
Example 2 78.36 69.14 65.07 59.42
Comparative example 3 61.07 32.75 22.67 15.16
Example 3 78.44 70.01 66.67 60.04
Comparative example 4 40.32 21.44 9.86 5.43
Example 4 71.87 59.62 44.32 36.45
TABLE 2 comparison of specific discharge capacity of first turn of examples and comparative examples
Figure BDA0002199027810000081
As can be seen from tables 1 and 2, the first cycle efficiency and the specific discharge capacity of the examples are significantly higher than those of the corresponding comparative examples when stored for the same period of time.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents.

Claims (8)

1. A high nickel anode material capable of being stably stored in the atmosphere is characterized in that: the conductive material is a ternary material, conductive agent particles are embedded in gaps of primary particles of the ternary material, the particle size of the conductive agent particles is smaller than that of the primary particles, and the hardness of the conductive agent particles is smaller than that of the primary particles.
2. The atmospheric storage-stable high-nickel positive electrode material according to claim 1, characterized in that: the ternary material is a layered material LiNixCoyMnzO2Wherein x +y + z is 1, x is more than or equal to 0.5 and less than or equal to 1, y is more than or equal to 0 and less than or equal to 0.5, and z is more than or equal to 0 and less than or equal to 0.5; or the like, or, alternatively,
the ternary material is a layered material LiNixCoyAlzO2Wherein x + y + z is 1, x is more than or equal to 0.8 and less than or equal to 1, y is more than or equal to 0 and less than or equal to 0.2, and z is more than 0 and less than or equal to 0.2; or the like, or, alternatively,
the ternary material is a layered material aLi2MnO3·(1-a)LiNixCoyMnzO2Wherein x + y + z is 1, a is more than 0 and less than 1, x is more than or equal to 0.5 and less than or equal to 1, y is more than or equal to 0 and less than or equal to 0.5, and z is more than or equal to 0 and less than or equal to 0.5.
3. The atmospheric storage-stable high-nickel positive electrode material according to claim 1, characterized in that: the mass ratio of the conductive agent particles to the ternary material is 0.5-10: 100.
4. The atmospheric storage-stable high-nickel positive electrode material according to claim 1, characterized in that: the conductive agent particles adopt a conductive agent of which the surface contains Lewis acid groups.
5. The atmospheric storage-stable high-nickel positive electrode material according to claim 4, wherein: the conductive agent comprises at least one of conductive graphite, acetylene black, carbon nanotubes, Super-P, pyrolytic carbon conductive agents, coke conductive agents, glassy carbon conductive agents, a sintered body of an organic polymer compound, mesocarbon microbeads or amorphous carbon.
6. The method for preparing a high-nickel cathode material capable of being stably stored in the atmosphere according to any one of claims 1 to 5, wherein: uniformly mixing the conductive agent particles and the ternary material according to the mass ratio of 0.5-10: 100, and calcining for 1-2 hours at the temperature of 300-600 ℃ to obtain the high-nickel anode material with the conductive agent particles embedded in gaps of primary particles.
7. The method for preparing a high nickel cathode material stable in storage in the atmosphere according to claim 7, wherein: the calcining atmosphere comprises air and inert gases, wherein the inert gases comprise nitrogen and argon.
8. The utility model provides a lithium ion battery, includes cathode material, electrolyte and diaphragm, its characterized in that: the positive electrode material is the high-nickel positive electrode material which is stable to store in the atmosphere and is disclosed in any one of claims 1 to 5.
CN201910858623.5A 2019-09-11 2019-09-11 High-nickel anode material with stable storage in atmosphere, preparation method and battery thereof Pending CN110752367A (en)

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阮泽文: ""LiNi_(1-x-y)Co_xAl_yO_2高镍三元正极材料的制备及改性研究"", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》 *

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