CN107093741B - A kind of preparation method of high magnification nickel cobalt lithium aluminate cathode material - Google Patents
A kind of preparation method of high magnification nickel cobalt lithium aluminate cathode material Download PDFInfo
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Abstract
The invention discloses a kind of preparation method of high magnification nickel cobalt lithium aluminate cathode material, it the following steps are included: (1) nickel cobalt lithium aluminate presoma preparation；(2) the lithium position doping vario-property of potassium ion；(3) lithium-containing compound clad is constructed.The present invention is replaced by the lithium position of potassium ion, is effectively improved the diffusion rate of lithium ion, is improved the high rate performance of material；The lithium-containing compound layer that material surface is constructed simultaneously can reduce material surface residual alkali content, reduce the flatulence of later period battery core；Effectively inhibit side reaction, promotes structural stability of the material in cyclic process；Lithium-containing compound layer has high conductive performance to lithium ion, accelerates the insertion and abjection of lithium ion, lithium-ion-conducting is poor when solving the problems, such as common metal oxides as clad, improves the cycle performance and high rate performance of material.
Description
Technical field
The invention belongs to field of lithium ion battery anode, in particular to a kind of high magnification nickel cobalt lithium aluminate cathode material
Preparation method.
Technical background
Lithium ion battery with its high-energy, the service life is long, pollution-free the advantages that, be widely used to mobile phone, laptop
Equal fields, while also starting to be applied to the power batteries fields such as electric bicycle, electric car.Lithium cobaltate cathode material is earliest
Realize commercialized positive electrode, but since cobalt resource is limited and expensive, pollution is big, limits its further development.It is high
Nickel system positive electrode Li (NixM1-x)O2(x >=0.6) becomes important lithium-ion electric because cost is relatively low, capacity is high and environmental-friendly
Pond positive electrode.As LiNiO2、LiCoO2And LiAlO2The class matter of three is the same as phase solid solution, nickel cobalt lithium aluminate
(LiNi0.8Co0.15Al0.05O2, abbreviation NCA) and the advantages of being provided simultaneously with the above three, it is considered as the substitute of cobalt acid lithium, dynamic
Power field of batteries will have boundless application market.
NCA material still remains some problems during battery applications: (1) due to cationic mixing effect and material
The phase transformation for expecting surface micro-structure causes irreversible capacity loss and the cycle performance decline of NCA；(2) electricity of NCA material preparation
It is more serious that core produces gas；(3) lithium ion diffusion coefficient is low, so that the high rate performance of material is less desirable.It is asked for above-mentioned these
Topic can improve its chemical property by ion doping and surface cladding.
The doping vario-property of NCA material is studied at present, the ionic compartmentation of transition metal layer is substantially, although can be certain
The chemical property of material is improved in degree, but the ionic compartmentation of transition metal layer cannot promote the migration rate of lithium ion.Such as
Disclose nickel cobalt lithium aluminate cathode material and preparation method thereof application No. is 201410445867.8 invention, but it is disclosed just
Pole material is the ionic compartmentation of transition metal layer, can stablize lattice structure, but cannot promote the migration rate of lithium ion.To NCA
It is oxide/phosphate etc. that material, which carries out covering material used by surface coats, and clad hinders electrolyte to material
Burn into inhibits the side reaction of material and electrolyte, but simultaneously as its electrochemicaUy inert, also can be to the biography of electronics and lithium ion
It leads and causes to hinder.It is modified by alumina-coated respectively that such as application No. is 201410004698.4 inventions, due to these substances
For electrochemically inactive material, the capacity of active material can be hindered to play.
Therefore a kind of novel nickel cobalt lithium aluminate cathode material, the Lai Gaishan above problem need to be developed, the invention patent passes through
The modified method of lithium-containing compound clad is adulterated and constructed in the lithium position of potassium ion, improves the chemical property of NCA material.
Summary of the invention
The technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide a kind of high magnification nickel cobalt lithium aluminate
The preparation method of positive electrode.The present invention is adulterated by the lithium position of potassium ion, is increased the interlayer spacing of lithium layer, is promoted lithium ion
Diffusion rate improves the high rate performance of material；It is (remained on surface relative to the difference of other positive electrodes for NCA material
Alkaline matter is higher) characteristic, design can react with surface residual alkali, generate the clad containing lithium with electro-chemical activity, improvement
The insertion and abjection of lithium ion finally improve the cycle performance and high rate performance of material.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of preparation method of high magnification nickel cobalt lithium aluminate cathode material, steps are as follows:
(1) preparation of nickel cobalt lithium aluminate persursor material: by uniformly mixed nickel, cobalt salt solution, and dissolved with aluminium salt
Ammonium hydroxide and sodium hydroxide mixed solution are injected in the reaction kettle containing bottom liquid simultaneously by certain speed, control entire reactant
The pH of system is 9-12, and agitating and heating reacts 8-16 h, and the solution after reaction is done at 80-120 DEG C by ageing, washing, filtering
It is dry, obtain nickel cobalt lithium aluminate persursor material；
(2) the lithium position doping vario-property of potassium ion: (herein by resulting nickel cobalt lithium aluminate persursor material and sylvite and lithium salts
Persursor material and the molar ratio of sylvite or lithium salts please limit) mixed calcining, crushed 200 mesh screens, obtain doping vario-property
Nickel cobalt lithium aluminate cathode material afterwards；
(3) lithium-containing compound clad is constructed: modifying agent being dissolved in dehydrated alcohol, is uniformly dispersed, be then added and mix
Miscellaneous modified nickel cobalt lithium aluminate cathode material, is dried to obtain powder after being stirred to react 3-10 h under conditions of 50 ~ 100 DEG C,
By calcining, it is cooled to room temperature, obtains high magnification nickel cobalt lithium aluminate cathode material.
Sylvite in the step (2) is potassium carbonate, carbonic acid potassium dihydrogen, bicarbonate dipotassium, potassium nitrate, potassium sulfate, acetic acid
One or more of potassium.
The molar ratio of nickel cobalt lithium aluminate persursor material and lithium salts is 1:1 ~ 1.05, sylvite and lithium salts in the step (2)
Molar ratio be 0.01 ~ 0.05:1.
Calcination temperature in the step (2) is 700 DEG C ~ 850 DEG C, and calcination time is 10 ~ 20 h.
Modifying agent in the step (3) is ammonium metavanadate, in ammonium phosphate, ammonium dihydrogen phosphate, diammonium hydrogen phosphate, cobalt phosphate
One or more.
The molar ratio of modifying agent and nickel cobalt lithium aluminate cathode material in the step (3) is 0.003 ~ 0.015:1.
Calcination temperature in the step (3) is 200 DEG C ~ 400 DEG C, and calcination time is 2 ~ 10h.
Beneficial effects of the present invention: the present invention is the modified method by adulterating and surface surrounding phase combines, out of material
Portion and the external comprehensive performance for improving material: (1) the biggish potassium ion of ionic radius in the lithium layer of NCA material is introduced, was both pressed down
It makes cationic mixing, stablize lattice structure, and the interlamellar spacing of lithium layer can be increased, promote the diffusion rate of lithium ion, improve NCA
Cycle performance and high rate performance；(2) feature high for the surface NCA residual alkali content, design can react generation containing lithium with residual alkali
Compound clad can both reduce the surface NCA residual alkali content, reduce the flatulence of later period battery core, and material can be promoted to recycle
Structural stability in the process, and improve the insertion and abjection of lithium ion, the final cycle performance for promoting NCA material and forthright again
Energy.
Detailed description of the invention
Fig. 1 is the scanning electron microscope (SEM) photograph of nickel cobalt lithium aluminate cathode material obtained in embodiment 1；
Fig. 2 is discharge curve of nickel cobalt lithium aluminate cathode material under the conditions of 0.2 C obtained in embodiment 1；
Fig. 3 is cycle performance figure of the nickel cobalt lithium aluminate cathode material under different multiplying obtained in embodiment 1.
Specific embodiment
The present invention will be described in detail combined with specific embodiments below.
Embodiment 1
The preparation method of the high magnification nickel cobalt lithium aluminate cathode material of the present embodiment, steps are as follows:
(1) preparation of nickel cobalt lithium aluminate presoma: 85:15 weighs nickel nitrate and cobalt nitrate crystals in molar ratio, is dissolved in water
It is uniformly mixed obtained mixed solution A afterwards, concentration of metal ions is 1.0 mol/L, weighs 5mol aluminum nitrate and is dissolved in 2 mol/L ammonia
Mixed solution B is made in the mixed solution of water and 4 mol/L sodium hydroxides, and mixed solution A and mixed solution B are injected simultaneously and contained
In the reaction kettle of bottom liquid, the pH value of entire reaction system is controlled 11.0 ± 0.02, mixing speed is 500 r/min, reaction 12
H, temperature are 55 DEG C, and reaction product is dry at 120 DEG C after ageing, washing, filtering, obtain nickel cobalt lithium aluminate presoma
Material；
(2) the lithium position doping vario-property of potassium ion: by resulting nickel cobalt lithium aluminate persursor material, lithium hydroxide and potassium nitrate
After mixing under oxygen atmosphere 750 DEG C of 16 h of calcining, crushed 200 mesh screens, obtain the nickel cobalt lithium aluminate anode of doping vario-property
Material；Wherein the molar ratio of nickel cobalt lithium aluminate persursor material and lithium hydroxide is 1:1.05, and potassium nitrate and lithium hydroxide rub
You are than being 0.02:1；
(3) lithium-containing compound clad is constructed: that 0.05 g(0.00043 mol) ammonium metavanadate is dissolved in 60 mL is anhydrous
In ethyl alcohol, it is uniformly dispersed, the 10.0 g(0.11 mol of nickel cobalt aluminic acid lithium material after doping vario-property is added in Xiang Shangshu solution),
It is stirred to react 3 h under conditions of 100 DEG C, powder is dried to obtain at 100 DEG C, dry powder is crushed after cooling, obtained in 400 DEG C of 3 h of calcining
To powerful nickel cobalt lithium aluminate cathode material.
The scanning electron microscope (SEM) photograph of nickel cobalt lithium aluminate cathode material is as shown in Figure 1.Products therefrom is assembled into button cell 2.8
Charge and discharge are carried out within the scope of ~ 4.3 V.Discharge curve of the nickel cobalt lithium aluminate cathode material that Fig. 2 is under the conditions of 0.2 C；
Cycle performance figure of the nickel cobalt lithium aluminate cathode material that Fig. 3 is under different multiplying.Under the conditions of 0.2 C, gained nickel cobalt aluminium
The specific discharge capacity of sour lithium anode material be 198 mAh/g, circulation 100 circle after, specific discharge capacity be 185 mAh/g, have compared with
Good cycle performance and high rate performance.
Embodiment 2
The preparation method of the high magnification nickel cobalt lithium aluminate cathode material of the present embodiment, steps are as follows:
(1) preparation of nickel cobalt lithium aluminate presoma: 85:15 weighs nickel sulfate and cobaltous sulfate crystal in molar ratio, is dissolved in water
After be uniformly mixed, concentration of metal ions is 1.0 mol/L, and the aluminum sulfate for weighing 5mol is dissolved in 2 mol/L ammonium hydroxide and 4 mol/L
In the mixed solution of sodium hydroxide, two kinds of mixed solutions are injected in the reaction kettle containing bottom liquid simultaneously, control entire reactant
For the pH value of system 11.5 ± 0.02, mixing speed is 700 r/min, reacts 16 h, and temperature is 50 DEG C, and reaction product is by old
Change, wash, after filtering, it is dry at 100 DEG C, obtain nickel cobalt lithium aluminate persursor material；
(2) the lithium position doping vario-property of potassium ion: resulting nickel cobalt lithium aluminate persursor material, lithium carbonate and potassium carbonate are mixed
After conjunction under oxygen atmosphere 800 DEG C of 10 h of calcining, crushed 200 mesh screens, obtain the nickel cobalt lithium aluminate anode material of doping vario-property
Material；Wherein the molar ratio of nickel cobalt lithium aluminate persursor material and lithium carbonate is 1:1.02, and the molar ratio of potassium carbonate and lithium carbonate is
0.05:1；
(3) lithium-containing compound clad is constructed: that 0.2 g(0.0013 mol) ammonium dihydrogen phosphate is dissolved in 60 mL is anhydrous
In ethyl alcohol, it is uniformly dispersed, the 10.0 g(0.11 mol of nickel cobalt aluminic acid lithium material after doping vario-property is added in Xiang Shangshu solution),
It is stirred to react 5 h under conditions of 80 DEG C, powder is dried to obtain at 100 DEG C, dry powder is crushed after cooling, obtained in 300 DEG C of 10 h of calcining
To powerful nickel cobalt lithium aluminate cathode material.
Under the conditions of 0.2 C, the specific discharge capacity of gained nickel cobalt lithium aluminate cathode material is 180 mAh/g, 100 circle of circulation
Afterwards, specific discharge capacity is 165 mAh/g, has preferable cycle performance.
Embodiment 3
The preparation method of the high magnification nickel cobalt lithium aluminate cathode material of the present embodiment, steps are as follows:
(1) preparation of nickel cobalt lithium aluminate presoma: 85:15 weighs nickel nitrate and cobalt nitrate crystals in molar ratio, is dissolved in water
After be uniformly mixed, concentration of metal ions is 5.0 mol/L, and the aluminum nitrate for weighing 5mol is dissolved in 10 mol/L ammonium hydroxide and 20
In the mixed solution of mol/L sodium hydroxide, two kinds of mixed solutions are injected in the reaction kettle containing bottom liquid simultaneously, control is entire anti-
Answer the pH value of system 12.0 ± 0.02, mixing speed is 800 r/min, reacts 8 h, and temperature is 55 DEG C, and reaction product is passed through
It is dry at 80 DEG C after ageing, washing, filtering, obtain nickel cobalt lithium aluminate persursor material；
(2) the lithium position doping vario-property of potassium ion: by resulting nickel cobalt lithium aluminate persursor material, lithium hydroxide and potassium sulfate
After mixing under oxygen atmosphere 700 DEG C of 20 h of calcining, crushed 200 mesh screens, obtain the nickel cobalt lithium aluminate anode of doping vario-property
Material；Wherein the molar ratio of nickel cobalt lithium aluminate persursor material and lithium hydroxide is 1:1.01, and potassium sulfate and lithium hydroxide rub
You are than being 0.01:1；
(3) lithium-containing compound clad is constructed: 0.03 g(0.0015 mol) ammonium phosphate is dissolved in 60 mL dehydrated alcohols
In, it is uniformly dispersed, the 10.0 g(0.11 mol of nickel cobalt aluminic acid lithium material after doping vario-property is added in Xiang Shangshu solution), at 70 DEG C
Under conditions of be stirred to react 6 h, be dried to obtain powder at 100 DEG C, dry powder crushes after cooling in 200 DEG C of 10 h of calcining, obtains height
The nickel cobalt lithium aluminate cathode material of multiplying power.
Under the conditions of 0.2 C, the specific discharge capacity of gained nickel cobalt lithium aluminate cathode material is 190 mAh/g, 100 circle of circulation
Afterwards, specific discharge capacity is 182 mAh/g, has preferable cycle performance.
Embodiment 4
The preparation method of the high magnification nickel cobalt lithium aluminate cathode material of the present embodiment, steps are as follows:
(1) preparation of nickel cobalt lithium aluminate presoma: 85:15 weighs nickel nitrate and cobalt nitrate crystals in molar ratio, is dissolved in water
After be uniformly mixed, concentration of metal ions is 2.0 mol/L, and the aluminum nitrate for weighing 5mol is dissolved in 4 mol/L ammonium hydroxide and 8 mol/L
In the mixed solution of sodium hydroxide, two kinds of mixed solutions are injected in the reaction kettle containing bottom liquid simultaneously, control entire reactant
For the pH value of system 10.0 ± 0.02, mixing speed is 700 r/min, reacts 8 h, and temperature is 50 DEG C, and reaction product is by old
Change, wash, after filtering, it is dry at 120 DEG C, obtain nickel cobalt lithium aluminate persursor material；
(2) the lithium position doping vario-property of potassium ion: by resulting nickel cobalt lithium aluminate persursor material, lithium acetate, potassium acetate and
After the mixing of carbonic acid potassium dihydrogen, 750 DEG C of 13 h of calcining, crushed 200 mesh screens, obtain the nickel of doping vario-property under oxygen atmosphere
Cobalt lithium aluminate cathode material；Wherein the molar ratio of nickel cobalt lithium aluminate persursor material and lithium acetate is 1:1.04, potassium acetate and carbon
Acid dihydride potassium (molar ratio 1:2) is as a whole 0.03:1 with the molar ratio of lithium acetate；
(3) lithium-containing compound clad is constructed: by 0.1 g ammonium phosphate (0.00049 mol), 0.08 g diammonium hydrogen phosphate
(0.00061 mol) and 0.05 g ammonium metavanadate (0.00043 mol) are dissolved in 60 mL dehydrated alcohols, are uniformly dispersed, Xiang Shangshu
The 10.0 g(0.11 mol of nickel cobalt aluminic acid lithium material after doping vario-property is added in solution), 10 are stirred to react under conditions of 50 DEG C
H, powder is dried to obtain at 100 DEG C, and dry powder crushes after cooling in 400 DEG C of 5 h of calcining, obtaining powerful nickel cobalt lithium aluminate just
Pole material.
Under the conditions of 0.2 C, the specific discharge capacity of gained nickel cobalt lithium aluminate cathode material is 185 mAh/g, 100 circle of circulation
Afterwards, specific discharge capacity is 170 mAh/g, has preferable cycle performance.
Embodiment 5
The preparation method of the high magnification nickel cobalt lithium aluminate cathode material of the present embodiment, steps are as follows:
(1) preparation of nickel cobalt lithium aluminate presoma: 85:15 weighs nickel acetate and cobalt acetate crystal in molar ratio, is dissolved in water
After be uniformly mixed, concentration of metal ions is 3.0 mol/L, and the aluminum acetate for weighing 5mol is dissolved in 6 mol/L ammonium hydroxide and 10 mol/
In the mixed solution of L sodium hydroxide, two kinds of mixed solutions are injected in the reaction kettle containing bottom liquid simultaneously, control entire reactant
For the pH value of system 9.0 ± 0.02, mixing speed is 600 r/min, reacts 8 h, and temperature is 55 DEG C.The ageing of reaction product process,
It is dry at 120 DEG C after washing, filtering, obtain nickel cobalt lithium aluminate persursor material；
(2) the lithium position doping vario-property of potassium ion: by resulting nickel cobalt lithium aluminate persursor material, lithium carbonate and bicarbonate two
Potassium mixing after under oxygen atmosphere 750 DEG C of 15 h of calcining, crushed 200 mesh screens, obtaining the nickel cobalt lithium aluminate of doping vario-property just
Pole material；Wherein the molar ratio of nickel cobalt lithium aluminate persursor material and lithium carbonate is 1:1, mole of bicarbonate dipotassium and lithium carbonate
Than for 0.04:1；
(3) lithium-containing compound clad is constructed: that 0.12 g ammonium metavanadate (0.00034 mol) is dissolved in 60 mL is anhydrous
In ethyl alcohol, it is uniformly dispersed, the 10.0 g(0.11 mol of nickel cobalt aluminic acid lithium material after doping vario-property is added in Xiang Shangshu solution),
It is stirred to react 8 h under conditions of 60 DEG C, powder is dried to obtain at 100 DEG C, dry powder is crushed after cooling, obtained in 350 DEG C of 2 h of calcining
To powerful nickel cobalt lithium aluminate cathode material.
Under the conditions of 0.2 C, the specific discharge capacity of gained nickel cobalt lithium aluminate cathode material is 178 mAh/g, 100 circle of circulation
Afterwards, specific discharge capacity is 160 mAh/g, has preferable cycle performance.
Embodiment 6
The preparation method of the high magnification nickel cobalt lithium aluminate cathode material of the present embodiment, steps are as follows:
(1) preparation of nickel cobalt lithium aluminate presoma: 85:15 weighs nickel acetate and cobalt acetate crystal in molar ratio, is dissolved in water
After be uniformly mixed, concentration of metal ions is 2.0 mol/L, and the aluminum acetate for weighing 5mol is dissolved in 5 mol/L ammonium hydroxide and 10 mol/
Two kinds of mixed solutions are injected in the reaction kettle containing bottom liquid simultaneously, control entire reaction system by the mixed solution of L sodium hydroxide
PH value 10.0 ± 0.02, mixing speed is 500 r/min, reacts 8 h, and temperature is 50 DEG C, reaction product by ageing,
It is dry at 120 DEG C after washing, filtering, obtain nickel cobalt lithium aluminate persursor material；
(2) the lithium position doping vario-property of potassium ion: by resulting nickel cobalt lithium aluminate persursor material, lithium hydroxide, carbonic acid two
After hydrogen potassium, bicarbonate dipotassium and potassium carbonate mixing, 700 DEG C of 16 h of calcining, crushed 200 mesh screens, obtain under oxygen atmosphere
The nickel cobalt lithium aluminate cathode material of doping vario-property；Wherein the molar ratio of nickel cobalt lithium aluminate persursor material and lithium hydroxide is 1:
1.05, carbonic acid potassium dihydrogen, bicarbonate dipotassium and potassium carbonate (molar ratio 0.8:1:1.2) as a whole with mole of lithium hydroxide
Than for 0.04:1；
(3) lithium-containing compound clad is constructed: 0.6 g cobalt phosphate (0.0012 mol) is dissolved in 50 mL dehydrated alcohols
In, it is uniformly dispersed, 10.0 g of nickel cobalt aluminic acid lithium material (0.11 mol) after doping vario-property is added in Xiang Shangshu solution, 85
It is stirred to react 5 h under conditions of DEG C, powder is dried to obtain at 100 DEG C, dry powder is crushed after cooling, obtained in 350 DEG C of 5 h of calcining
Powerful nickel cobalt lithium aluminate cathode material.
Under the conditions of 0.2 C, the specific discharge capacity of gained nickel cobalt lithium aluminate cathode material is 160 mAh/g, 100 circle of circulation
Afterwards, specific discharge capacity is 140 mAh/g.
Claims (6)
1. a kind of preparation method of high magnification nickel cobalt lithium aluminate cathode material, it is characterised in that steps are as follows:
(1) preparation of nickel cobalt lithium aluminate persursor material: by uniformly mixed nickel, cobalt salt solution, and the ammonium hydroxide dissolved with aluminium salt
It is injected in the reaction kettle containing bottom liquid simultaneously with sodium hydroxide mixed solution, the pH for controlling entire reaction system is 9-12, stirring
Heating reaction 8-16 h, the solution after reaction passes through ageing, washing, filtering, dry at 80-120 DEG C, obtains nickel cobalt lithium aluminate
Persursor material；
(2) the lithium position doping vario-property of potassium ion: by resulting nickel cobalt lithium aluminate persursor material and sylvite and lithium salts mixed calcining,
It crushed 200 mesh screens, the nickel cobalt lithium aluminate cathode material after obtaining doping vario-property；
(3) lithium-containing compound clad is constructed: modifying agent being dissolved in dehydrated alcohol, is uniformly dispersed, doping is then added and changes
Property after nickel cobalt lithium aluminate cathode material, be dried to obtain powder after being stirred to react 3-10 h under conditions of 50 ~ 100 DEG C, pass through
Calcining, is cooled to room temperature, obtains high magnification nickel cobalt lithium aluminate cathode material；Nickel cobalt lithium aluminate presoma material in the step (2)
Expect to be 1:1 ~ 1.05 with the molar ratio of lithium salts, the molar ratio of sylvite and lithium salts is 0.01 ~ 0.05:1.
2. the preparation method of high magnification nickel cobalt lithium aluminate cathode material according to claim 1, it is characterised in that: the step
Suddenly the sylvite in (2) is one of potassium carbonate, carbonic acid potassium dihydrogen, bicarbonate dipotassium, potassium nitrate, potassium sulfate, potassium acetate or several
Kind.
3. the preparation method of high magnification nickel cobalt lithium aluminate cathode material according to claim 1, it is characterised in that: the step
Suddenly the calcination temperature in (2) is 700 DEG C ~ 850 DEG C, and calcination time is 10 ~ 20 h.
4. a kind of preparation method of high magnification nickel cobalt lithium aluminate cathode material according to claim 1, it is characterised in that: institute
Stating the modifying agent in step (3) is one of ammonium metavanadate, ammonium phosphate, ammonium dihydrogen phosphate, diammonium hydrogen phosphate, cobalt phosphate or several
Kind.
5. the preparation method of high magnification nickel cobalt lithium aluminate cathode material according to claim 1, it is characterised in that: the step
Suddenly the molar ratio of the modifying agent in (3) and nickel cobalt lithium aluminate cathode material is 0.003 ~ 0.015:1.
6. the preparation method of high magnification nickel cobalt lithium aluminate cathode material according to claim 1, it is characterised in that: the step
Suddenly the calcination temperature in (3) is 200 DEG C ~ 400 DEG C, and calcination time is 2 ~ 10h.
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| CN107959004A (en) * | 2017-10-23 | 2018-04-24 | 格林美（无锡）能源材料有限公司 | A kind of anode material of lithium battery and preparation method of nitrogen-doped graphene and lithium molybdate |
| CN107910549A (en) * | 2017-10-31 | 2018-04-13 | 中国科学院青海盐湖研究所 | Positive electrode for lithium ion battery and its preparation method and application |
| CN108011100A (en) * | 2017-12-15 | 2018-05-08 | 中国科学院成都有机化学有限公司 | A kind of tertiary cathode material of surface reaction cladding and preparation method thereof |
| CN108314094B (en) * | 2018-01-29 | 2020-02-07 | 蒋央芳 | Preparation method of small-particle nickel cobalt aluminum hydroxide |
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