CN104218233A - Composite lithium ion battery positive electrode material with high rate performance and preparation method of material - Google Patents

Composite lithium ion battery positive electrode material with high rate performance and preparation method of material Download PDF

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Publication number
CN104218233A
CN104218233A CN201410460332.8A CN201410460332A CN104218233A CN 104218233 A CN104218233 A CN 104218233A CN 201410460332 A CN201410460332 A CN 201410460332A CN 104218233 A CN104218233 A CN 104218233A
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lithium
ion battery
lithium ion
high rate
preparation
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毛玉琴
韩珽
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Haining Mei Darui New Material Science And Technology Ltd
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Haining Mei Darui New Material Science And Technology Ltd
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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
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/582—Halogenides
    • 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 relates to a composite lithium ion battery positive electrode material with high rate performance and a preparation method of the material. The composite lithium ion battery positive electrode material is composed of two activity substances, namely LiNiaCO(1-a-b)MnbO2 and lithium cobalt oxide, as well as an AlF3 cladding layer, wherein the surface of the activity substances is coated with the cladding layer; a is greater than 0 and smaller than 1, b is greater than 0 and smaller than 1, and 1-a-b is greater than 0 and smaller than 1; the mass of the nickel-cobalt lithium manganite ternary material is 10%-90% of the sum of the mass of the nickel-cobalt lithium manganite ternary material and the mass of lithium cobalt oxide, and the mass ratio of the AlF3 cladding layer to the active substances is (0.001-0.05) to 1. The preparation method comprises the following steps: uniformly mixing LiNiaCO(1-a-b)MnbO2 and lithium cobalt oxide according to a certain proportion, adding in a trivalent aluminum source solution, stirring to form a solid-liquid mixture, adding a fluorine source solution and stirring, spray-drying and calcining. The specific capacity of the composite material provided by the invention is greatly improved in comparison with that of lithium cobalt oxide, and the compaction density, the conductivity and the voltage platform are greatly improved in comparison with those of the nickel-cobalt lithium manganite ternary material, and the rate performance and the cycle performance are good.

Description

Lithium ion battery composite cathode material of a kind of high rate capability and preparation method thereof
Technical field
The present invention relates to a kind of lithium ion battery, particularly relate to lithium ion battery composite cathode material of a kind of high rate capability and preparation method thereof.
Background technology
Energy density is high owing to having for lithium ion battery, memory-less effect, operating temperature range is wide, self-discharge rate is low, pollution-free, have extended cycle life, the plurality of advantages such as security performance is good, since coming out, be widely used in the portable electric appts such as mobile communications tool and camera, notebook.
The maximum lithium ion anode material of application mainly contains cobalt acid lithium, lithium nickelate, LiMn2O4 and nickle cobalt lithium manganate ternary material at present.Cobalt acid lithium is industrialization the earliest and business-like material, the chemical property of cobalt acid lithium is comparatively stablized, is conducted electricity very well, voltage platform is higher, good cycle, compacted density can reach 4.0g/cm3, but the specific capacity of cobalt acid lithium is relatively low, only has 140mAh/g, and cobalt toxicity is larger, cobalt resource is rare, expensive, and its over-charge safety performance is poor.The synthetic difficulty of lithium nickelate, the poor reproducibility of material; Although layered lithium manganate has higher specific capacity, structural stability is poor, and the LiMn2O4 specific capacity of spinel-type is lower, and structure under high temperature has to be strengthened.Although nickle cobalt lithium manganate ternary material combines the performance performance of cobalt acid lithium, lithium nickelate and LiMn2O4, there is Heat stability is good, the features such as under high potential the high and cost of material of specific capacity is low, but ternary material voltage platform is lower, platform discharge time is short, compacted density also lower, cycle performance is poor.
Cobalt acid lithium and nickle cobalt lithium manganate bi-material are mixed in proportion, can make the performance of bi-material obtain complementation, not only can improve compacted density and the electric conductivity of composite material, and the capacity of material also can be improved accordingly.Be coated modification on the surface of composite material, can effectively improve the structural stability of material, stop electrolyte in material surface generation side reaction, thereby improve the cycle performance of lithium ion battery, improve the security performance of battery simultaneously.
Summary of the invention
The object of the present invention is to provide that a kind of voltage platform is high, forthright good low cost positive electrode doubly, overcome the deficiency of existing positive electrode, adopt coated modification simultaneously, improve the cycle performance of material.
To achieve these goals, the present invention has adopted following technical scheme:
First aspect, a kind of lithium ion battery composite cathode material of high rate capability, described composite positive pole is by LiNi aco 1-a-bmn bo 2, cobalt acid two kinds of active materials of lithium and be coated on the AlF on active material surface 3coating layer composition, wherein 0<a<1,0<b<1,0<1-a-b<1.
As preferably, described nickle cobalt lithium manganate ternary material accounts for 10%～90% of nickle cobalt lithium manganate ternary material and cobalt acid lithium quality summation.
As preferably, described AlF 3the mass ratio of coating layer and active material is 0.001～0.05:1.
As further preferred, described AlF 3the mass ratio of coating layer and active material is 0.005～0.03:1.
Second aspect, a kind of preparation method of lithium ion battery composite cathode material of the high rate capability as described in first aspect, is characterized in that, comprises the following steps:
(1) by a certain amount of LiNi aco 1-a-bmn bo 2mix according to a certain percentage with two kinds of active materials of cobalt acid lithium;
(2) mixed active material is joined in the solution of trivalent aluminium source and stir and form solidliquid mixture, add fluorine source solution to stir in this solidliquid mixture, aluminium element and fluorine element form aluminum fluoride coating layer on active material surface;
(3) by step, the solidliquid mixture in is (2) sprayed dry;
(4) after above-mentioned dried solid material being calcined to a period of time at a certain temperature, obtain composite positive pole.
As preferably, described LiNi aco 1-a-bmn bo 2d50 be 5～25 μ m, the D50 of cobalt acid lithium is 5～25 μ m.
As further optimization, described LiNi aco 1-a-bmn bo 2for the primary particle second particle forming of reuniting, D50 is 10～20 μ m, D10>=5 μ m, and D90≤30 μ m, the D50 of described cobalt acid lithium is 10～20 μ m, D10>=5 μ m, D90≤30 μ m.
As preferably, trivalent aluminium source solution is aluminum nitrate aqueous solution, and described fluorine source solution is ammonium fluoride aqueous solution.
As preferably, the mol ratio of aluminum nitrate and ammonium fluoride is 1:3.
As preferably, described calcining heat is 300～500 DEG C, and calcination time is 3～6h, and described calcination atmosphere is nitrogen or argon gas.
Compared with prior art, great advantage of the present invention and beneficial effect are as follows:
(1) bi-material is mixed according to a certain percentage, make the specific capacity of the composite material of gained have more significantly and improve with respect to the sour lithium of cobalt, compacted density, conductivity and voltage platform are enhanced with respect to nickle cobalt lithium manganate ternary material.
(2) mixed material is carried out to low-temperature sintering processing, can improve drawing abillity, ensure the consistency of pole piece in battery preparation process.
(3) adopt aluminum nitrate and the ammonium fluoride raw material as clad material, the aqueous solution of aluminum nitrate and ammonium fluoride is faintly acid, can carry out pickling to composite material, reduces the pH value of material.
(4) mixed material being carried out to surface is coated, make coating layer in isolated electrolyte and positive electrode, lithium ion freely be passed through, thereby avoid the decomposition of electrolyte under high voltage completing in discharging and recharging, improved cycle life and the stability of ion battery.
Documents:
CN101071859 discloses lithium battery positive pole active substance, anode dressing and preparation method thereof, cobalt acid lithium and ternary material are carried out preparing pole piece after simple mechanical mixture according to a certain percentage, and the present invention is different is with it after mixing, material to be coated and calcination processing.
CN102332577A discloses a kind of lithium ion battery and positive electrode thereof, after cobalt acid lithium and ternary material are proportionally mixed, mixed positive electrode is coated to processing simultaneously, gram volume and the compacted density of material are improved, the present invention is different is with it the material difference of surface coating layer, and cobalt acid lithium is different from the proportion of ternary material.
CN102386392A discloses a kind of anode material for lithium-ion batteries and preparation method thereof and lithium ion battery, after proportionally being mixed, cobalt acid lithium and ternary material carry out pickling processes, improve the capacity of existing lithium ion battery by improving the charging voltage of lithium ion battery, improve thermal stability, fail safe and cycle performance under lithium ion battery high voltage, the place that the present invention is different is coated and processes and calcination processing material after being to mix simultaneously.
CN102544474B discloses the preparation method of high energy energy density positive composite material of lithium battery, by LiCoO 2with LiNi xco ym (1-x-y)o 2bi-material proportionally mixes, after mixing, process to reduce lithium carbonate, the lithia impurity of composite material remained on surface, improve energy density, processing characteristics and the cycle performance of material, difference of the present invention is that mixed material is coated, aluminum nitrate and ammonium fluoride aqueous solution are faintly acid simultaneously, can reduce the pH value of composite material.
Brief description of the drawings
Fig. 1 is the first charge-discharge curve chart of the composite positive pole of embodiment 1.
Fig. 2 is the cycle charge-discharge curve chart of the composite positive pole of embodiment 1.
Fig. 3 is the discharge curve of embodiment 1 under different multiplying.
Embodiment
For the present invention being had to darker understanding; below in conjunction with embodiment, technical scheme is clearly and completely described; but embodiments of the invention are only used to explain the present invention; and unrestricted the present invention; the every other case study on implementation that those skilled in the art obtain under the prerequisite of not making creative work, all belongs to protection scope of the present invention.
Embodiment 1:
By LiNi 1/3co 1/3mn 1/3o 2be dry mixed in the ratio of 5:5 with two kinds of active materials of cobalt acid lithium, mixing time is 3h.
Aluminum nitrate and ammonium fluoride are at room temperature mixed with respectively to aluminum nitrate solution and ammonium fluoride solution according to the mol ratio of 1:3.
Above-mentioned mixed active material is joined in the solution of trivalent aluminium source and stirs and form solidliquid mixture, add fluorine source solution to stir in this solidliquid mixture, aluminium element and fluorine element form aluminum fluoride coating layer on active material surface; The quality of the aluminum fluoride forming accounts for mixes 1% of rear active material quality.
Above-mentioned solidliquid mixture is sprayed dry, dried solid material is put into atmosphere furnace, rise to 500 DEG C with the heating rate of 3 DEG C/min, and be incubated 5h in 500 DEG C, nitrogen or argon gas atmosphere, cooling, obtain composite positive pole after pulverizing, sieving.
The electrochemical property test of material adopts blue electric battery test system to test at 25 DEG C, and test voltage scope is 2.7V～4.3V; High rate performance test condition: 0.2C discharges and recharges once, and the each electric discharge of 0.2C charging 0.5C/1C/5C/10C once; Cycle performance test condition: discharge and recharge with 1C multiplying power, circulate 100 weeks, investigate capability retention.The specific discharge capacity of material under 0.2C multiplying power is 170mAh/g, under 0.5C multiplying power, specific discharge capacity is 165 mAh/g, specific discharge capacity under 1C multiplying power is 160mAh/g, specific discharge capacity under 5C multiplying power is 150mAh/g, specific discharge capacity under 10C multiplying power is 146mAh/g, 10C/0.2C electric discharge ratio is 85.9%, and high rate performance is better.100 weeks capability retentions of 1C charge and discharge cycles are greater than 97%, and cycle performance is better.
Embodiment 2:
By LiNi 0.5co 0.2mn 0.3o 2be dry mixed in the ratio of 6:4 with two kinds of active materials of cobalt acid lithium, mixing time is 3h.
Aluminum nitrate and ammonium fluoride are at room temperature mixed with respectively to aluminum nitrate solution and ammonium fluoride solution according to the mol ratio of 1:3.
Above-mentioned mixed active material is joined in the solution of trivalent aluminium source and stirs and form solidliquid mixture, add fluorine source solution to stir in this solidliquid mixture, aluminium element and fluorine element form aluminum fluoride coating layer on active material surface; The quality of the aluminum fluoride forming accounts for mixes 0.5% of rear active material quality.
Above-mentioned solidliquid mixture is sprayed dry, dried solid material is put into atmosphere furnace, rise to 400 DEG C with the heating rate of 3 DEG C/min, and be incubated 6h in 400 DEG C, nitrogen or argon gas atmosphere, cooling, obtain composite positive pole after pulverizing, sieving.
Embodiment 3:
By LiNi 1/3co 1/3mn 1/3o 2be dry mixed in the ratio of 7:3 with two kinds of active materials of cobalt acid lithium, mixing time is 3h.
Aluminum nitrate and ammonium fluoride are at room temperature mixed with respectively to aluminum nitrate solution and ammonium fluoride solution according to the mol ratio of 1:3.
Above-mentioned mixed active material is joined in the solution of trivalent aluminium source and stirs and form solidliquid mixture, add fluorine source solution to stir in this solidliquid mixture, aluminium element and fluorine element form aluminum fluoride coating layer on active material surface; The quality of the aluminum fluoride forming accounts for mixes 2% of rear active material quality.
Above-mentioned solidliquid mixture is sprayed dry, dried solid material is put into atmosphere furnace, rise to 400 DEG C with the heating rate of 3 DEG C/min, and be incubated 6h in 400 DEG C, nitrogen or argon gas atmosphere, cooling, obtain composite positive pole after pulverizing, sieving.
Embodiment 4:
By LiNi 0.8co 0.1mn 0.1o 2be dry mixed in the ratio of 3:7 with two kinds of active materials of cobalt acid lithium, mixing time is 3h.
Aluminum nitrate and ammonium fluoride are at room temperature mixed with respectively to aluminum nitrate solution and ammonium fluoride solution according to the mol ratio of 1:3.
Above-mentioned mixed active material is joined in the solution of trivalent aluminium source and stirs and form solidliquid mixture, add fluorine source solution to stir in this solidliquid mixture, aluminium element and fluorine element form aluminum fluoride coating layer on active material surface; The quality of the aluminum fluoride forming accounts for mixes 2% of rear active material quality.
Above-mentioned solidliquid mixture is sprayed dry, dried solid material is put into atmosphere furnace, rise to 500 DEG C with the heating rate of 3 DEG C/min, and be incubated 4h in 500 DEG C, nitrogen or argon gas atmosphere, cooling, obtain composite positive pole after pulverizing, sieving.

Claims (10)

1. a lithium ion battery composite cathode material for high rate capability, is characterized in that, by LiNi aco 1-a-bmn bo 2with cobalt acid two kinds of active materials of lithium and be coated on the AlF on active material surface 3coating layer composition, wherein 0<a<1,0<b<1,0<1-a-b<1.
2. the lithium ion battery composite cathode material of high rate capability according to claim 1, is characterized in that, described nickle cobalt lithium manganate ternary material accounts for 10%～90% of nickle cobalt lithium manganate ternary material and cobalt acid lithium quality summation.
3. the lithium ion battery composite cathode material of high rate capability according to claim 1, is characterized in that, described AlF 3the mass ratio of coating layer and active material is 0.001～0.05:1.
4. the lithium ion battery composite cathode material of high rate capability according to claim 1, is characterized in that, described AlF 3the mass ratio of coating layer and active material is 0.005～0.03:1.
5. a preparation method for the lithium ion battery composite cathode material of high rate capability according to claim 1, is characterized in that, comprises the following steps:
(1) by a certain amount of LiNi aco 1-a-bmn bo 2mix according to a certain percentage with two kinds of active materials of cobalt acid lithium;
(2) mixed active material is joined in the solution of trivalent aluminium source and stir and form solidliquid mixture, add fluorine source solution to stir in this solidliquid mixture, aluminium element and fluorine element form aluminum fluoride coating layer on active material surface;
(3) by step, the solidliquid mixture in is (2) sprayed dry;
(4) after above-mentioned dried solid material being calcined to a period of time at a certain temperature, obtain composite positive pole.
6. the preparation method of the lithium ion battery composite cathode material of high rate capability according to claim 5, is characterized in that, described LiNi aco 1-a-bmn bo 2d50 be 5～25 μ m, the D50 of cobalt acid lithium is 5～25 μ m.
7. the preparation method of the lithium ion battery composite cathode material of high rate capability according to claim 5, is characterized in that, described LiNi aco 1-a-bmn bo 2for the primary particle second particle forming of reuniting, D50 is 10～20 μ m, D10>=5 μ m, and D90≤30 μ m, the D50 of described cobalt acid lithium is 10～20 μ m, D10>=5 μ m, D90≤30 μ m.
8. the preparation method of the lithium ion battery composite cathode material of high rate capability according to claim 5, is characterized in that, described trivalent aluminium source solution is aluminum nitrate aqueous solution, and described fluorine source solution is ammonium fluoride aqueous solution.
9. the preparation method of the lithium ion battery composite cathode material of high rate capability according to claim 8, is characterized in that, described aluminum nitrate and the mol ratio of ammonium fluoride are 1:3.
10. the preparation method of the lithium ion battery composite cathode material of high rate capability according to claim 5, is characterized in that, described calcining heat is 300～500 DEG C, and calcination time is 3～6h, and described calcination atmosphere is nitrogen or argon gas.
CN201410460332.8A 2014-09-11 2014-09-11 Composite lithium ion battery positive electrode material with high rate performance and preparation method of material Pending CN104218233A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104966833A (en) * 2015-07-28 2015-10-07 宁德时代新能源科技有限公司 Positive electrode material and preparation method thereof as well as lithium ion battery containing positive electrode material
CN105406056A (en) * 2015-12-31 2016-03-16 湖南桑顿新能源有限公司 Long-cycle and high-safety power lithium ion battery positive electrode material and preparation method thereof
CN105958017A (en) * 2016-05-10 2016-09-21 山东玉皇新能源科技有限公司 Preparation method for aluminum-fluoride-coated lithium nickel cobalt manganate positive electrode material
CN106099080A (en) * 2016-08-27 2016-11-09 山东威能环保电源科技股份有限公司 A kind of lithium ion battery based on NCM trielement composite material and preparation method thereof
CN107534126A (en) * 2015-01-15 2018-01-02 珍拉布斯能源有限公司 For positive electrode active materials of the high-energy density secondary battery with composite coating and corresponding technique
CN107706372A (en) * 2017-09-12 2018-02-16 山东大学 A kind of combination electrode material of Mxene claddings and preparation method thereof
CN108134066A (en) * 2017-12-22 2018-06-08 佛山市实达科技有限公司 Lithium ion battery anode glue size and preparation method, lithium ion battery and preparation method
CN111477859A (en) * 2020-05-09 2020-07-31 宁波锋成纳米科技有限公司 Composite positive electrode material, preparation method thereof and water-based secondary battery
CN112510181A (en) * 2020-12-07 2021-03-16 欣旺达电动汽车电池有限公司 Composite cathode material, preparation method thereof and lithium ion battery

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CN102569722A (en) * 2012-02-20 2012-07-11 宁德新能源科技有限公司 Lithium ion secondary battery and anode thereof
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WO2013055416A1 (en) * 2011-10-12 2013-04-18 Battelle Memorial Institute Metal fluoride electrode protection layer and method of making same
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Publication number Priority date Publication date Assignee Title
CN107534126A (en) * 2015-01-15 2018-01-02 珍拉布斯能源有限公司 For positive electrode active materials of the high-energy density secondary battery with composite coating and corresponding technique
CN104966833A (en) * 2015-07-28 2015-10-07 宁德时代新能源科技有限公司 Positive electrode material and preparation method thereof as well as lithium ion battery containing positive electrode material
CN105406056A (en) * 2015-12-31 2016-03-16 湖南桑顿新能源有限公司 Long-cycle and high-safety power lithium ion battery positive electrode material and preparation method thereof
CN105958017A (en) * 2016-05-10 2016-09-21 山东玉皇新能源科技有限公司 Preparation method for aluminum-fluoride-coated lithium nickel cobalt manganate positive electrode material
CN106099080A (en) * 2016-08-27 2016-11-09 山东威能环保电源科技股份有限公司 A kind of lithium ion battery based on NCM trielement composite material and preparation method thereof
CN107706372A (en) * 2017-09-12 2018-02-16 山东大学 A kind of combination electrode material of Mxene claddings and preparation method thereof
CN107706372B (en) * 2017-09-12 2020-05-22 山东大学 Mxene-coated composite electrode material and preparation method thereof
CN108134066A (en) * 2017-12-22 2018-06-08 佛山市实达科技有限公司 Lithium ion battery anode glue size and preparation method, lithium ion battery and preparation method
CN108134066B (en) * 2017-12-22 2021-02-02 佛山市实达科技有限公司 Lithium ion battery positive electrode slurry and preparation method thereof, lithium ion battery and preparation method thereof
CN111477859A (en) * 2020-05-09 2020-07-31 宁波锋成纳米科技有限公司 Composite positive electrode material, preparation method thereof and water-based secondary battery
CN112510181A (en) * 2020-12-07 2021-03-16 欣旺达电动汽车电池有限公司 Composite cathode material, preparation method thereof and lithium ion battery

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Application publication date: 20141217