CN109659545A - Preparation method, ternary cathode material of lithium ion battery and the battery of ternary cathode material of lithium ion battery - Google Patents
Preparation method, ternary cathode material of lithium ion battery and the battery of ternary cathode material of lithium ion battery Download PDFInfo
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Abstract
The present invention relates to battery technology fields, and the preparation method of in particular to ternary cathode material of lithium ion battery, ternary cathode material of lithium ion battery and battery；The preparation method includes that soluble zirconates and dispersing agent are dissolved in solvent, obtains the first solution；Tertiary cathode material and ammonium fluoride are mixed in the first solution, obtain the second solution；Second solution is dry, obtain product；Product is subjected to isothermal holding, obtains prefabricated modified powder；The case where ternary cathode material of lithium ion battery of preparation method preparation can be improved by electrolytic corrosion, so that the stable structure of material, to improve the cyclical stability of material.
Description
Technical field
The present invention relates to battery technology fields, and the preparation method of in particular to ternary cathode material of lithium ion battery, lithium
Ion battery tertiary cathode material and battery.
Background technique
In recent years, big due to the vehicles such as hybrid electric vehicle, pure electric vehicle of target that are dedicated to zero-emission etc.
Sizable application, high energy lithium ion cell (battery pack) are rapidly developed.And to produce the lithium ion of high-energy
The raising of battery, positive electrode performance is necessary, for example high operating voltage, high specific discharge capacity and length are followed
Ring service life etc..But the operating voltage of the positive electrode of some business is often below 5V, causes its discharge capacity insufficient, studies carefully
Its reason is because if wanting to reach high discharge capacity, and material generally requires more lithiums, this can make material structure not
Stablize, and material, under the de- lithium state of height, the nickel of+4 valence of surface directly contacts with electrolyte and generates a large amount of heat and oxygen,
The thermal stability for reducing material, also results in discharge capacity and declines rapidly, show very poor security performance and cycle performance.Cause
This, the cycle performance for how improving anode material for lithium-ion batteries has become lithium electricity industry crowd researcher and enterprise is badly in need of
The problem of solution.
Summary of the invention
The first purpose of this invention is to provide a kind of preparation method of ternary cathode material of lithium ion battery, the preparation
The technique of method is relatively simple, easily operated, and the preparation method can the surface of tertiary cathode material coat zirconium fluoride into
The case where row is modified, and the modification tertiary cathode material prepared is improved by electrolytic corrosion, so that the structure of material
Stablize, to improve the cyclical stability of material.
Second object of the present invention is to provide a kind of ternary cathode material of lithium ion battery, and the surface of the material is by fluorine
Change zirconium and carry out coating modification, corrosion condition in the electrolytic solution can be improved, the stable structure of the positive electrode has preferable
Cyclical stability.
Third object of the present invention is to provide a kind of battery, and the stable circulation system of the battery is improved.
What the present invention adopts the following technical solutions to realize.
The present invention proposes a kind of preparation method of ternary cathode material of lithium ion battery comprising by soluble zirconates and divides
Powder is dissolved in solvent, obtains the first solution；Tertiary cathode material and ammonium fluoride are mixed in the first solution, obtain the second solution；
Second solution is dry, obtain product；Product is subjected to isothermal holding, obtains prefabricated modified powder.
The present invention proposes a kind of ternary cathode material of lithium ion battery, is by above-mentioned lithium ion battery tertiary cathode material
The preparation method preparation of material.
The present invention proposes that a kind of battery, the positive electrode of the battery include above-mentioned ternary cathode material of lithium ion battery.
The beneficial effect of the preparation method of the ternary cathode material of lithium ion battery of the embodiment of the present invention is: system of the invention
Then Preparation Method mixes tertiary cathode material and ammonium fluoride by dissolving solubility zirconates and dispersing agent in the first solution, then
Product after the second solution of isothermal holding is dry, can be obtained the pre-made powder in the tertiary cathode material of surface coating modification,
Zirconium fluoride is coated on the surface of tertiary cathode material by wet chemistry method, so that the surface of modified tertiary cathode material obtains
Protection, when in use, it is not easy to by the corrosion of electrolyte, so that the material that modified material is stable in HF environment
Structure, so as to improve the cyclical stability of the material.
The beneficial effect of the ternary cathode material of lithium ion battery of the embodiment of the present invention is: the lithium ion battery tertiary cathode
Material is prepared by above-mentioned preparation method, and the surface of the ternary material is coated by zirconium fluoride, so that the tertiary cathode
It is not readily susceptible to the corrosion of electrolyte when the use of material, improves stable structure of the tertiary cathode material in HF environment
Property, improve the cyclical stability of the tertiary cathode material.
The beneficial effect of the battery of the embodiment of the present invention is: the positive electrode of the battery includes above-mentioned lithium ion battery three
First positive electrode, so as to improve the thermal stability and cycle performance of the battery.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the transmission electron microscope picture of the zirconium fluoride coating modification nickel cobalt lithium aluminate prepared in the embodiment of the present invention 1；
Fig. 2 is the cycle performance figure of the battery of the material preparation in the embodiment of the present invention 1 and comparative example 1.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Below just to the preparation method of the ternary cathode material of lithium ion battery of the embodiment of the present invention, lithium ion battery ternary
Pole material and battery are specifically described.
The preparation method of ternary cathode material of lithium ion battery of the invention includes: to be dissolved in soluble zirconates and dispersing agent
In solvent, the first solution is obtained；Tertiary cathode material and ammonium fluoride (NH are mixed in above-mentioned first solution4F), it is molten to obtain second
Liquid；Second solution is dry, obtain product；Above-mentioned product is subjected to isothermal holding, obtains prefabricated modified powder.
It should be noted that the present embodiment soluble zirconates and dispersing agent purity preferably analyze it is pure.
Preferably, the preparation method of ternary cathode material of lithium ion battery of the invention further include: to above-mentioned pre-made powder
Ball-milling treatment is carried out, to obtain the tertiary cathode material of zirconium fluoride coating modification；In detail, above-mentioned pre-made powder is placed in vacuum
Under the conditions of carry out ball-milling treatment, revolution rate is 400-600rpm, autorotation speed 800-1200rpm, Ball-milling Time 1-4h
Afterwards, the tertiary cathode material of zirconium fluoride coating modification is obtained；It is further preferred that revolution rate and autorotation speed ratio are 1:2.
It is further preferred that the zirconium fluoride covering amount of the tertiary cathode material with the zirconium fluoride coating modification of this method preparation
For 0.1%-10%；Above-mentioned zirconium fluoride covering amount, which can refer to, prepares what modified ternary material generated with preparation method of the invention
The quality of zirconium fluoride with react before tertiary cathode material and production zirconium fluoride quality summation ratio.
Further, the solvent of the present embodiment includes ethyl alcohol, preferably dehydrated alcohol；Optionally, in other embodiments,
Solvent can also select other organic solvents that can dissolve dispersing agent and soluble zirconates or water etc..
Further, the soluble zirconates of the present embodiment includes at least one of zirconium nitrate and zirconium sulfate.
Further, above-mentioned dispersing agent includes polyacrylamide.
Further, above-mentioned tertiary cathode material includes nickel cobalt lithium aluminate.
Preferably, it after dispersing agent and soluble zirconates being dissolved in solvent, is fitted into magnetic stirring apparatus and is stirred, stir
The revolving speed mixed can be 400-800rpm, and the time of stirring is 0.5-1h, the first solution is made.
Further, when preparing the second solution, the quality of tertiary cathode material is 3.5-388.6 times of soluble zirconates.
In detail, 0.5-2h is stirred after tertiary cathode material being made an addition to the first solution；Still further, the revolving speed of stirring can be
400-800rpm.It should be noted that when the quality of tertiary cathode material is 3.5 times of soluble zirconates, fluorination obtained
The zirconium fluoride covering amount of the tertiary cathode material of zirconium coating modification is 10%, when the quality of tertiary cathode material is soluble zirconates
388.6 times of quality when, the zirconium fluoride covering amount of the tertiary cathode material of zirconium fluoride coating modification obtained is 0.1%.
Preferably, the quality of dispersing agent can be the 0.5%-1% of tertiary cathode material.
Still further, the molal quantity of ammonium fluoride is 4-4.5 times of soluble zirconates when the second solution of preparation.In detail,
Ammonium fluoride is made an addition to and stirs 4-8h in the solution containing tertiary cathode material.
In detail, the second solution is dry, it specifically includes: will be dried again after the filtering of the second solution.
Isothermal holding is carried out to product in the present invention to specifically include: being heated up according to 3-10 DEG C of heating rate per minute, until
Temperature reaches 400-550 DEG C, and keeps the temperature 2-6h under the conditions of 400-550 DEG C；In detail, can place the product in Muffle furnace,
Isothermal holding is carried out under oxygen atmosphere.
Further, above-mentioned isothermal holding further include: be every according to rate of temperature fall after 420-550 DEG C of heat preservation 2-6h
5-10 DEG C of cooling of minute, and until temperature is down to room temperature, to obtain pre-made powder.
The lithium battery tertiary cathode material of the preparation method preparation of lithium battery tertiary cathode material provided by the invention can be with
Positive electrode as lithium battery prepares lithium battery, and the specific preparation method of lithium battery is similar with the relevant technologies, herein no longer
It repeats.
With reference to embodiments to the preparation method of ternary cathode material of lithium ion battery of the invention, lithium ion battery three
First positive electrode and battery are described in further detail.
Embodiment 1
It is 1.95% according to zirconium fluoride cladding mass ratio, weighs the pure zirconium nitrate of 5.05g analysis respectively and 0.5g analysis is pure poly-
Acrylamide, polyacrylamide and zirconium nitrate are dissolved in 50ml dehydrated alcohol, are then charged into magnetic stirring apparatus, are with revolving speed
The mixing speed of 400rpm stirs 0.5h, obtains the first solution.
99 times of the nickel cobalt lithium aluminate that quality is zirconium nitrate is added in the first solution after stirring 2h, adds molal quantity
The ammonium fluoride of 4.3 times of zirconium nitrates stirs 4h at room temperature, is then filtered, dries to the second obtained solution, i.e.,
Product can be obtained.
Above-mentioned product is placed in Muffle furnace, 500 DEG C of heat preservations are warming up to 3 DEG C/min of heating rate under oxygen atmosphere
Then 5h is down to room temperature with the rate of temperature fall of 5 DEG C/min, obtains pre-made powder.
Ball-milling treatment is carried out to above-mentioned product using high energy ball mill under vacuum conditions, the revolution rate of ball-milling treatment is
The tertiary cathode material of zirconium fluoride coating modification can be obtained in 500rpm, autorotation speed 1000rpm, Ball-milling Time 2h.
Embodiment 2
It is 3.9% according to zirconium fluoride cladding mass ratio, weighs 10.0g respectively and analyze pure zirconium nitrate and 0.5g analysis pure poly- third
Polyacrylamide and zirconium nitrate are dissolved in dehydrated alcohol by acrylamide, are then charged into magnetic stirring apparatus, are 600rpm with revolving speed
Mixing speed stir 0.5h, obtain the first solution.
98 times of the nickel cobalt lithium aluminate that quality is zirconium nitrate is added in the first solution after stirring 1h, adds molal quantity
The ammonium fluoride of 4.4 times of zirconium nitrates stirs 8h at room temperature, is then filtered, dries to the second obtained solution, i.e.,
Product can be obtained.
Above-mentioned product is placed in Muffle furnace, 550 DEG C of heat preservations are warming up to 5 DEG C/min of heating rate under oxygen atmosphere
Then 4h is down to room temperature with the rate of temperature fall of 5 DEG C/min, obtains pre-made powder.
Ball-milling treatment is carried out to above-mentioned product using high energy ball mill under vacuum conditions, the revolution rate of ball-milling treatment is
The tertiary cathode material of zirconium fluoride coating modification can be obtained in 400rpm, autorotation speed 800rpm, Ball-milling Time 2h.
Embodiment 3
It is 7.8% according to zirconium fluoride cladding mass ratio, weighs 20.6g respectively and analyze pure zirconium nitrate and 0.5g analysis pure poly- third
Polyacrylamide and zirconium nitrate are dissolved in dehydrated alcohol by acrylamide, are then charged into magnetic stirring apparatus, are 800rpm with revolving speed
Mixing speed stir 0.5h, obtain the first solution.
95 times of the nickel cobalt lithium aluminate that quality is zirconium nitrate is added in the first solution after stirring 2h, adds molal quantity
The ammonium fluoride of 4.5 times of zirconium nitrates stirs 4h at room temperature, is then filtered, dries to the second obtained solution, i.e.,
Product can be obtained.
Above-mentioned product is placed in Muffle furnace, 500 DEG C of heat preservations are warming up to 10 DEG C/min of heating rate under oxygen atmosphere
Then 6h is down to room temperature with the rate of temperature fall of 10 DEG C/min, obtains pre-made powder.
Ball-milling treatment is carried out to above-mentioned product using high energy ball mill under vacuum conditions, the revolution rate of ball-milling treatment is
The tertiary cathode material of zirconium fluoride coating modification can be obtained in 600rpm, autorotation speed 1200rpm, Ball-milling Time 4h.
Embodiment 4
Polyacrylamide and zirconium nitrate are dissolved in dehydrated alcohol, are then charged into magnetic stirring apparatus, is with revolving speed
The mixing speed of 400rpm stirs 0.6h, obtains the first solution.
3.5 times of the nickel cobalt lithium aluminate that quality is zirconium nitrate is added in the first solution, 2h is stirred with the revolving speed of 400rpm
Afterwards, the ammonium fluoride for adding 4 times of zirconium nitrates of molal quantity stirs 8h at room temperature, then to the second obtained solution into
Row filtering, drying, can be obtained product.The quality of polyacrylamide is the 0.5% of the quality of nickel cobalt lithium aluminate.
Above-mentioned product is placed in Muffle furnace, 400 DEG C of heat preservations are warming up to 6 DEG C/min of heating rate under oxygen atmosphere
Then 6h is down to room temperature with the rate of temperature fall of 5 DEG C/min, obtains pre-made powder.
Ball-milling treatment is carried out to above-mentioned product using high energy ball mill under vacuum conditions, the revolution rate of ball-milling treatment is
The tertiary cathode material of zirconium fluoride coating modification can be obtained in 400rpm, autorotation speed 800rpm, Ball-milling Time 4h.
Embodiment 5
Polyacrylamide and zirconium nitrate are dissolved in dehydrated alcohol, are then charged into magnetic stirring apparatus, is with revolving speed
The mixing speed of 800rpm stirs 1h, obtains the first solution.
388.6 times of the nickel cobalt lithium aluminate that quality is zirconium nitrate is added in the first solution after stirring 0.5h, adds and rub
The ammonium fluoride of your several 4.5 times of zirconium nitrates, stirs 4h at room temperature, is then filtered, does to the second obtained solution
It is dry, product can be obtained.The quality of polyacrylamide is the 1% of the quality of nickel cobalt lithium aluminate.
Above-mentioned product is placed in Muffle furnace, 550 DEG C of heat preservations are warming up to 10 DEG C/min of heating rate under oxygen atmosphere
Then 4h is down to room temperature with the rate of temperature fall of 10 DEG C/min, obtains pre-made powder.
Ball-milling treatment is carried out to above-mentioned product using high energy ball mill under vacuum conditions, the revolution rate of ball-milling treatment is
The tertiary cathode material of zirconium fluoride coating modification can be obtained in 600rpm, autorotation speed 1200rpm, Ball-milling Time 1h.
Embodiment 6
Polyacrylamide, zirconium nitrate and zirconium sulfate are dissolved in 35ml dehydrated alcohol, are then charged into magnetic stirring apparatus, with
The mixing speed that revolving speed is 700rpm stirs 0.8h, obtains the first solution.
It is to stir 1.5h in zirconium nitrate and 200 times of nickel cobalt lithium aluminate the first solution of addition of zirconium sulfate total weight by quality
Afterwards, the ammonium fluoride for adding 4.4 times of zirconium nitrates and zirconium sulfate total weight of molal quantity stirs 6h at room temperature, then right
The second obtained solution is filtered, dries, and product can be obtained.The quality of polyacrylamide is the quality of nickel cobalt lithium aluminate
0.8%.
Above-mentioned product is placed in Muffle furnace, 520 DEG C of heat preservations are warming up to 8 DEG C/min of heating rate under oxygen atmosphere
Then 5.5h is down to room temperature with the rate of temperature fall of 7 DEG C/min, obtains pre-made powder.
Ball-milling treatment is carried out to above-mentioned product using high energy ball mill under vacuum conditions, the revolution rate of ball-milling treatment is
The tertiary cathode material of zirconium fluoride coating modification can be obtained in 550rpm, autorotation speed 1000rpm, Ball-milling Time 3h.
Embodiment 7
Polyacrylamide and zirconium sulfate are dissolved in 45ml dehydrated alcohol, are then charged into magnetic stirring apparatus, is with revolving speed
The mixing speed of 650rpm stirs 0.6h, obtains the first solution.
120 times of the nickel cobalt lithium aluminate that quality is zirconium sulfate is added in the first solution after stirring 1h, adds molal quantity
The ammonium fluoride of 4.2 times of zirconium sulfates stirs 5.5h at room temperature, is then filtered, dries to the second obtained solution,
Product can be obtained.The quality of polyacrylamide is the 0.6% of the quality of nickel cobalt lithium aluminate.
Above-mentioned product is placed in Muffle furnace, 480 DEG C of heat preservations are warming up to 4 DEG C/min of heating rate under oxygen atmosphere
Then 4.5h is down to room temperature with the rate of temperature fall of 9 DEG C/min, obtains pre-made powder.
Ball-milling treatment is carried out to above-mentioned product using high energy ball mill under vacuum conditions, the revolution rate of ball-milling treatment is
The tertiary cathode material of zirconium fluoride coating modification can be obtained in 450rpm, autorotation speed 900rpm, Ball-milling Time 2.5h.
Embodiment 8
Polyacrylamide and zirconium nitrate are dissolved in 45ml dehydrated alcohol, are then charged into magnetic stirring apparatus, is with revolving speed
The mixing speed of 650rpm stirs 0.6h, obtains the first solution.
244 times of the nickel cobalt lithium aluminate that quality is zirconium nitrate is added in the first solution after stirring 1h, adds molal quantity
The ammonium fluoride of 4.3 times of zirconium nitrates stirs 5.5h at room temperature, is then filtered, dries to the second obtained solution,
Product can be obtained.
Above-mentioned product is placed in Muffle furnace, under oxygen atmosphere and temperature is to keep the temperature 4.5h under 480 DEG C of environment, then
It is naturally cooling to room temperature, obtains pre-made powder.
Ball-milling treatment is carried out to above-mentioned product using high energy ball mill under vacuum conditions, the revolution rate of ball-milling treatment is
The tertiary cathode material of zirconium fluoride coating modification can be obtained in 650rpm, autorotation speed 1100rpm, Ball-milling Time 2.5h.
Embodiment 9
Polyacrylamide and zirconium nitrate are dissolved in dehydrated alcohol, are then charged into magnetic stirring apparatus, is with revolving speed
The mixing speed of 700rpm stirs 0.8h, obtains the first solution.
321.5 times of the nickel cobalt lithium aluminate that quality is zirconium nitrate is added in the first solution after stirring 2h, is added mole
The ammonium fluoride of several 4.2 times of zirconium nitrates, stirs 6h at room temperature, is then filtered, dries to the second obtained solution,
Product can be obtained.The quality of polyacrylamide is the 0.9% of the quality of nickel cobalt lithium aluminate.
Above-mentioned product is placed in Muffle furnace, 520 DEG C of heat preservations are warming up to 8 DEG C/min of heating rate under oxygen atmosphere
Then 6h is down to room temperature with the rate of temperature fall of 7 DEG C/min, obtains pre-made powder.
Ball-milling treatment is carried out to above-mentioned product using high energy ball mill under vacuum conditions, the revolution rate of ball-milling treatment is
The tertiary cathode material of zirconium fluoride coating modification can be obtained in 600rpm, autorotation speed 1200rpm, Ball-milling Time 1h.
Comparative example 1
The nickel cobalt lithium aluminate as a comparison case 1 of coating modification is carried out using non-the method according to the invention.
It is prepared into using above-described embodiment 1-9 and the nickel cobalt lithium aluminate of comparative example 1 as positive electrode according to following technique
Battery: being mixed and made into slurry for each group positive electrode and acetylene black and PVDF with 90:5:5 ratio, be homogeneously applied on aluminium foil,
Pole piece is made and makees anode, is lithium piece to electrode, is assembled into 2032 type button cells；Then following test is carried out: in 0.1C, 1C
Under the current density of (1C=180mA/g), in the voltage range of 2.8V~4.3V, the high rate performance of each group battery is tested, meanwhile,
Battery recycles 100 times under conditions of 1C, 2.8V~4.3V charge and discharge, obtains each group circulating battery 100 times capacity retention ratios,
It the results are shown in Table 1 test example 1-10 (test example 1-10 respectively corresponds embodiment 1-9 and comparative example 1).
The capacity retention ratio that 1 each group circulating battery of table is 100 times
According to the result of table 1 and Fig. 1, Fig. 2 it is found that preparation method of the invention can coat on the surface of nickel cobalt lithium aluminate
Zirconium fluoride improves the stability of material structure, and fluorine obtained so that cladding protection materials mitigate the corrosion by electrolyte
The tertiary cathode material of change zirconium coating modification can improve the cycle performance of the battery of preparation.
In conclusion the beneficial effect of the preparation method of the ternary cathode material of lithium ion battery of the embodiment of the present invention is:
Preparation method of the invention mixed in the first solution by dissolving soluble zirconates and dispersing agent, then tertiary cathode material and
Ammonium fluoride, then the second solution of isothermal holding it is dry after product, the tertiary cathode material in surface coating modification can be obtained
Pre-made powder coats zirconium fluoride on the surface of tertiary cathode material by wet chemistry method, so that modified tertiary cathode material
Surface protected, when in use, it is not easy to by the corrosion of electrolyte, so that modified material is in HF environment
Stable material structure, so as to improve the cyclical stability of the material.
The beneficial effect of the ternary cathode material of lithium ion battery of the embodiment of the present invention is: the lithium ion battery tertiary cathode
Material is prepared by above-mentioned preparation method, and the surface of the ternary material is coated by zirconium fluoride, so that the tertiary cathode
It is not readily susceptible to the corrosion of electrolyte when the use of material, improves stable structure of the tertiary cathode material in HF environment
Property, improve the cyclical stability of the tertiary cathode material.
The beneficial effect of the battery of the embodiment of the present invention is: the positive electrode of the battery includes above-mentioned lithium ion battery three
First positive electrode, so as to improve the thermal stability and cycle performance of the battery.
Embodiments described above is a part of the embodiment of the present invention, instead of all the embodiments.Reality of the invention
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Claims (10)
1. a kind of preparation method of ternary cathode material of lithium ion battery characterized by comprising
Soluble zirconates and dispersing agent are dissolved in solvent, obtain the first solution；
Tertiary cathode material and ammonium fluoride are mixed in first solution, obtain the second solution；
Second solution is dry, obtain product；
The product is subjected to isothermal holding, obtains prefabricated modified powder.
2. the preparation method of ternary cathode material of lithium ion battery according to claim 1, which is characterized in that further include:
Ball-milling treatment is carried out to the pre-made powder, obtains the tertiary cathode material of zirconium fluoride coating modification.
3. the preparation method of ternary cathode material of lithium ion battery according to claim 2, which is characterized in that the fluorination
The zirconium fluoride covering amount of the tertiary cathode material of zirconium cladding is 0.1%-10%.
4. the preparation method of ternary cathode material of lithium ion battery according to claim 1, which is characterized in that the solvent
Including ethyl alcohol；And/or
The solubility zirconates includes at least one of zirconium nitrate and zirconium sulfate；And/or
The dispersing agent includes polyacrylamide；And/or
The tertiary cathode material includes nickel cobalt lithium aluminate.
5. the preparation method of ternary cathode material of lithium ion battery according to claim 1, which is characterized in that the ternary
The quality of positive electrode is 3.5-388.6 times of the quality of the soluble zirconates.
6. the preparation method of ternary cathode material of lithium ion battery according to claim 1, which is characterized in that the fluorination
The molal quantity of ammonium is 4-4.5 times of the soluble zirconates.
7. the preparation method of ternary cathode material of lithium ion battery according to claim 1, which is characterized in that the heat preservation
Processing specifically includes: heating up according to 3-10 DEG C per minute of heating rate, until temperature reaches 400-550 DEG C, and in 400-550
2-6h is kept the temperature under the conditions of DEG C.
8. the preparation method of ternary cathode material of lithium ion battery according to claim 7, which is characterized in that the heat preservation
Processing is specific further include: is 5-10 DEG C per minute cooling according to rate of temperature fall after 400-550 DEG C of heat preservation 2-6h.
9. a kind of ternary cathode material of lithium ion battery, which is characterized in that its be by the described in any item lithiums of claim 1-8 from
The preparation method preparation of sub- battery tertiary cathode material.
10. a kind of battery, which is characterized in that the positive electrode of the battery includes lithium ion battery three as claimed in claim 9
First positive electrode.
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| CN112002879A (en) * | 2020-06-04 | 2020-11-27 | 长沙理工大学 | Zirconium tetrafluoride coated aluminum fluoride double-doped lithium manganate positive electrode material and preparation method thereof |
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| CN108807950A (en) * | 2018-08-08 | 2018-11-13 | 河北省科学院能源研究所 | The rich nickel ternary composite electrode material and preparation method thereof of fluoride modification |
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