CN108550802A - A kind of nickel-cobalt-manganternary ternary anode material and preparation method that Y/La doping Co/B is coated altogether - Google Patents
A kind of nickel-cobalt-manganternary ternary anode material and preparation method that Y/La doping Co/B is coated altogether Download PDFInfo
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- 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
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- 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
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Abstract
The present invention is suitable for technical field of lithium batteries, a kind of nickel-cobalt-manganternary ternary anode material and preparation method that Y/La doping Co/B is coated altogether is provided, the present invention is using a small amount of Y3+ ions of incorporation, La3+ ions improve cycle performance and security performance, since Y3+/La3+ is identical as the valence state of Ni3+, the Y3+/La3+ of incorporation can enter W metal 3+, and and Y3+/La3+ fixed prices in charge and discharge process, it is electrochemicaUy inert, the variation of valence state does not occur in charge and discharge, the variation of volume does not occur thus yet, it can play the role of skeleton, stable crystal structure, improve the cycle life and security performance of material；In addition, Co/B clad anode materials can also effectively improve the cycle performance and electronic conductivity of battery under high voltages, reduce residual alkali, reduce flatulence, therefore the nickel-cobalt-manganternary ternary anode material of cladding altogether provided by the invention can prevent the generation of side reaction in a very effective manner, to improve the cycle performance and chemical property of lithium battery.
Description
Technical field
The invention belongs to technical field of lithium batteries more particularly to a kind of nickel-cobalt-manganese ternaries that coat altogether of Y/La doping Co/B just
Pole material and preparation method.
Background technology
Nickelic nickel-cobalt-manganese ternary anode material for lithium-ion batteries is since with low cost, toxicity is low, higher energy
Density is widely used in HEV and PHEV new-energy automobiles field.But simple nickle cobalt lithium manganate Ni in charge and discharge process2+Very
Li layers are easily accessible, mixing is serious, and Li ions are not easy deintercalation, and the cycle life and safety to material cause greatly to endanger
Evil.In addition, side reaction occurs when with electrolyte contacts for positive electrode, thermostabilization is deteriorated, Ni during de- Li4+Also become
It is unstable.
Invention content
In view of the above problems, the purpose of the present invention is to provide a kind of nickel-cobalt-manganese ternaries that coat altogether of Y/La doping Co/B just
Pole material and preparation method, it is intended to solve the cycle performance of the violent manganese tertiary cathode material of existing nickel and the technology that high rate performance is poor
Problem.
On the one hand, the nickel-cobalt-manganternary ternary anode material preparation method that the Y/La doping Co/B is coated altogether includes following steps
Suddenly：
Step S1, nickel cobalt manganese presoma is weighed；
Step S2, according to the tenor of nickel, cobalt, manganese in nickel cobalt manganese presoma it is anticipated that ratio weighs a certain amount of contain
The compound of Y and La and a certain amount of Li source compound；
Step S3, the compound containing Y and La is added to height together with nickel cobalt manganese presoma and Li source compound
It is sufficiently mixed in fast blender, is then calcined, obtain doping basis material；
Step S4, the doping basis material is add to deionized water and is stirred evenly, cobalt salt is then added dropwise and continues to stir
It mixes, obtains the positive electrode slurries of cobalt hydroxide cladding；
Step S5, the positive electrode slurries are filtered, washed, dry obtain cobalt hydroxide cladding positive electrode powder
End；
Step S6, the positive electrode powder that the cobalt hydroxide coats is mixed with lithium salts and is carried out double sintering, obtain
The positive electrode of cobalt acid lithium cladding；
Step S7, the positive electrode of source compound containing B and cobalt acid lithium cladding is added in high speed blender fully
Mixing, is then calcined, and the nickel-cobalt-manganternary ternary anode material that Y/La doping Co/B is coated altogether is obtained.
Further, in step S2, the incorporation mole of Y, La are that nickel, cobalt, manganese Metal mole are total in nickel cobalt manganese presoma
The 0.001-0.1% of amount, the compound containing Y and La are oxide, carbonate and one kind or several in nitrate of Y, La
Kind, the amount of Li source compound Li in molar ratio：Me=0.9-1.1:1 calculate, wherein Me be nickel cobalt manganese presoma in nickel,
Cobalt, manganese Metal moles total number.
Further, in the calcination process of step S3, calcination temperature is 700 DEG C -900 DEG C, calcination time 10-25h.
Further, the cobalt salt that step S4 is added dropwise is one in cobaltous sulfate, cobalt acetate, cobalt oxalate, cobalt nitrate, cobalt chloride
Kind is several, and the covering amount of cobalt element is 1000-5000ppm.
Further, in the sintering process of step S6, sintering temperature is 600 DEG C -800 DEG C, sintering time 6h-12h.
Further, in step S7, the B source compounds are containing one or both of boron oxide compound, boric acid, B element
Covering amount be 1000-3000ppm.
Further, in the calcination process of step S7, calcination temperature is 200 DEG C -400 DEG C, calcination time 6h-12h.
On the other hand, the nickel-cobalt-manganternary ternary anode material that the Y/La doping Co/B is coated altogether, internal layer are that Y and La is adulterated
Doping basis material, outer layer is the clad that coats altogether of Co and B, and the nickel-cobalt-manganese ternary that the Y/La doping Co/B is coated altogether is just
Pole material is prepared using preceding method.
The beneficial effects of the invention are as follows：The present invention program is using a small amount of Y of incorporation3+Ion, La3+Ion recycles to improve
Performance and security performance, due to Y3+/La3+With Ni3+Valence state it is identical, the Y of incorporation3+/La3+W metal can be entered3+Position, and
And and Y3+/La3+The fixed price in charge and discharge process is electrochemicaUy inert, and the variation of valence state does not occur in charge and discharge, because
And the variation of volume does not occur yet, skeleton can be played the role of, stable crystal structure improves the cycle life and safety of material
Performance；In addition, Co/B clad anode materials can also effectively improve the cycle performance and electronic conductivity of battery under high voltages, drop
Low residual alkali reduces flatulence, therefore the nickel-cobalt-manganternary ternary anode material of cladding altogether provided by the invention can hinder in a very effective manner
The only generation of side reaction, to improve the cycle performance and chemical property of lithium battery.
Description of the drawings
Fig. 1 is the discharge cycles curve graph of embodiment one and comparative example one at 2.75V to 4.3V voltages under 1C multiplying powers.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The nickel-cobalt-manganternary ternary anode material preparation method that Y/La doping Co/B provided by the invention is coated altogether includes following steps
Suddenly：
Step S1, nickel cobalt manganese presoma is weighed.
Here the type, such as NCM811, NCM523, NCM622 etc. of nickel cobalt manganese presoma are not limited.
Step S2, according to the tenor of nickel, cobalt, manganese in nickel cobalt manganese presoma it is anticipated that ratio weighs a certain amount of contain
The compound of Y and La and a certain amount of Li source compound.
Step S3, the compound containing Y and La is added to height together with nickel cobalt manganese presoma and Li source compound
It is sufficiently mixed in fast blender, is then calcined, obtain doping basis material.
This step mixes nickel cobalt manganese presoma with the compound of Y and La, Li source compound, and then calcining is mixed
Miscellaneous basis material, calcination temperature are 700 DEG C -900 DEG C, calcination time 10-25h.The incorporation mole of Y, La are in this step
The 0.001-0.1% of nickel, cobalt, manganese Metal moles total number in nickel cobalt manganese presoma, the compound containing Y and La are the oxygen of Y, La
One or more of compound, carbonate and nitrate, the amount of Li source compound Li in molar ratio：Me=0.9-1.1:1
It calculates, wherein Me is nickel, cobalt, manganese Metal moles total number in nickel cobalt manganese presoma.
Step S4, the doping basis material is add to deionized water and is stirred evenly, cobalt salt is then added dropwise and continues to stir
It mixes, obtains the positive electrode slurries of cobalt hydroxide cladding.
The cobalt salt is one or more of cobaltous sulfate, cobalt acetate, cobalt oxalate, cobalt nitrate, cobalt chloride, the packet of cobalt element
The amount of covering is 1000-5000ppm.
Step S5, the positive electrode slurries are filtered, washed, dry obtain cobalt hydroxide cladding positive electrode powder
End.
Step S6, the positive electrode powder that the cobalt hydroxide coats is mixed with lithium salts and is carried out double sintering, obtain
The positive electrode of cobalt acid lithium cladding.
In this step sintering process, sintering temperature is 600 DEG C -800 DEG C, sintering time 6h-12h.
Step S7, the positive electrode of source compound containing B and cobalt acid lithium cladding is added in high speed blender fully
Mixing, is then calcined, and the nickel-cobalt-manganternary ternary anode material that Y/La doping Co/B is coated altogether is obtained.
The B source compounds are containing one or both of boron oxide compound, boric acid, and the covering amount of B element is 1000-
3000ppm.Calcination temperature is 200 DEG C -400 DEG C, calcination time 6h-12h in this step, the Y/La doping obtained after calcining
The nickel-cobalt-manganternary ternary anode material that Co/B is coated altogether, internal layer are the doping basis material that Y and La is adulterated, and outer layer is total for Co and B
The clad of cladding.
In order to verify positive electrode effect of the present invention, illustrated below by specific implementation.
Embodiment one：
(1.1) 100g Ni are weighed0.83Co0.11Mn0.06(OH)2The Y of presoma, 0.1% doping2O3(0.127g) with
La2O3(0.117g) is added after mixing, by lithium hydroxide and precursor powder according to Li/ (Ni+Co+Mn)=1.01:1.1
It is added to the mixing of high speed blender.500 DEG C of low-temperature sintering 240min under the atmosphere of oxygen are being warming up to 800 DEG C of high temperature sinterings
720min is cooled to 600 DEG C of heat preservation 120min, is naturally cooling to obtain once sintered Y/La doping basis materials after 100 DEG C.
(1.2) the once sintered Y/La doping basis materials of 100g are added to 40 DEG C, stirred in 50g deionized waters
10min instills the cobaltous sulfate of 1mol/L, filtration washing after 10min is stirred, after Rotary Evaporators dynamic dries 60min, 120
After DEG C vacuum drying chamber drying 480min, the positive electrode powder of cobalt hydroxide cladding is obtained, 700 DEG C two under the atmosphere of oxygen
Secondary sintering 10h, is naturally cooling to 100 DEG C, obtains the positive electrode of cobalt acid lithium cladding.
(1.3) boron oxide of the positive electrode and 0.1% mass ratio that coat 100g cobalt acid lithiums after mixing, in air
The lower 250 DEG C of sintering 12h of atmosphere, be naturally cooling to 100 DEG C, obtain the nickel-cobalt-manganese ternary anode materials that coat altogether of Y/La doping Co/B
Material.
(1.4) it makes button cell and tests electrical property.
The nickel-cobalt-manganternary ternary anode material Ni that the Y/La doping Co/B of system is coated altogether0.83Co0.11Mn0.06With conductive agent second
Alkynes carbon black, binder PVDF is according to mass ratio 80：12：8 ratios are uniformly mixed, and -2 pyrrolidones ball milling of suitable 1- methyl is added
It is made into slurry within 1 hour to be evenly coated on aluminium flake, positive plate is made in drying, tabletting.It is assembled into 2032 buttons by cathode of metal lithium sheet
Formula battery, using Siken test systems to carry out electric performance test, (for charging/discharging voltage for 2.75~4.3V, high voltage charge and discharge are electric
Pressure is 2.75~4.4V).
The result shows that the lithium battery being mixed with is in 0.1C multiplying powers, discharge capacity is 205mAh/g for the first time, and head effects are 89%,
Capacity retention ratio is 98.4% after 50 cycles under 1C multiplying powers.
Comparative example one：
(1.1) 100g Ni are weighed0.83Co0.11Mn0.06(OH)2After presoma, by lithium hydroxide and precursor powder according to
Li/ (Ni+Co+Mn)=1.01:1.1 are added to the mixing of high speed blender.500 DEG C of low-temperature sinterings under the atmosphere of oxygen
240min is being warming up to 800 DEG C of high temperature sintering 720min, is cooled to 600 DEG C of heat preservation 120min, after being naturally cooling to 100 DEG C
To once sintered positive electrode.
(1.2) by the once sintered positive electrodes of 100g under the atmosphere of oxygen 600 DEG C of double sintering 10h, be naturally cooling to
100 DEG C, obtain common anode material for lithium-ion batteries.
(1.3) it makes button cell and tests electrical property.
By the conventional lithium-ion battery positive electrode Ni of preparation0.83Co0.11Mn0.06With conductive agent acetylene carbon black, binder
PVDF is according to mass ratio 80：12：8 ratios are uniformly mixed, and -2 pyrrolidones ball milling of suitable 1- methyl is added and is made into slurry within 1 hour
It is evenly coated on aluminium flake, positive plate is made in drying, tabletting.2032 button cells are assembled by cathode of metal lithium sheet, are used
Siken test system carry out electric performance test (charging/discharging voltage be 2.75~4.3V, high voltage charging/discharging voltage be 2.75~
4.4V)。
The result shows that the lithium battery being mixed with is in 0.1C multiplying powers, discharge capacity is 193.3mAh/g for the first time, and head effects are
81%, capacity retention ratio is 93.4% after 50 cycles under 1C multiplying powers.
Embodiment two：
(2.1) 100g Ni are weighed0.80Co0.10Mn0.10(OH)2The Y of presoma, 0.1% doping2O3(0.127g) with
La2O3(0.117g) is added after mixing, and lithium carbonate is with precursor powder according to Li/ (Ni+Co+Mn)=1.01:1.1 being added
It is mixed to high mixing device.500 DEG C of low-temperature sintering 240min under the atmosphere of oxygen are being warming up to 800 DEG C of high temperature sintering 720min,
600 DEG C of heat preservation 120min are cooled to, are naturally cooling to obtain once sintered Y/La doping basis materials after 100 DEG C.
(2.2) the once sintered Y/La doping basis materials of 100g are added to 40 DEG C, stirred in 50g deionized waters
10min instills the cobalt oxalate of 1mol/L, stirs filtration washing after 10min, after Rotary Evaporators dynamic dries 60min, 120 DEG C
Vacuum drying chamber dry 480min after, obtain cobalt hydroxide cladding positive electrode powder, under the atmosphere of oxygen 700 DEG C it is secondary
It is sintered 10h, is naturally cooling to 100 DEG C, obtains the positive electrode of cobalt acid lithium cladding.
(2.3) anode material for lithium-ion batteries that 100g cobalt acid lithiums coat is mixed with the boron oxide of 0.1% mass ratio
After even, 250 DEG C of sintering 12h, are naturally cooling to 100 DEG C under the atmosphere of air, obtain the nickel cobalt that Y/La doping Co/B is coated altogether
Manganese tertiary cathode material.
(2.4) it makes button cell and tests electrical property.
By the nickel-cobalt-manganternary ternary anode material Ni for obtaining Y/La doping Co/B and coating altogether of system0.80Co0.10Mn0.10With conduction
Agent acetylene carbon black, binder PVDF is according to mass ratio 80：12：8 ratios are uniformly mixed, and suitable -2 pyrrolidones of 1- methyl is added
Ball milling is made into slurry in 1 hour and is evenly coated on aluminium flake, and positive plate is made in drying, tabletting.It is assembled by cathode of metal lithium sheet
2032 button cells, using Siken test systems to carry out electric performance test, (for 2.75~4.3V, high voltage fills charging/discharging voltage
Discharge voltage is 2.75~4.4V).
The result shows that the lithium battery being mixed with is in 0.1C multiplying powers, discharge capacity is 200.8mAh/g for the first time, and head effects are
89.2%, capacity retention ratio is 98.1% after 50 cycles under 1C multiplying powers.
Comparative example two：
(2.1) 100g Ni are weighed0.80Co0.10Mn0.10(OH)2After presoma, by lithium carbonate and precursor powder according to Li/
(Ni+Co+Mn)=1.01:1.1 are added to high mixing device mixing.500 DEG C of low-temperature sintering 240min under the atmosphere of oxygen, are rising
Temperature is cooled to 600 DEG C of heat preservation 120min to 800 DEG C of high temperature sintering 720min, obtained after being naturally cooling to 100 DEG C it is once sintered just
Pole material.
(2.2) by positive electrode once sintered 100g under the atmosphere of oxygen 600 DEG C of double sintering 10h, Temperature fall
To 100 DEG C, common anode material for lithium-ion batteries is obtained.
(2.3) it makes button cell and tests electrical property.
By common positive electrode Ni0.80Co0.10Mn0.10With conductive agent acetylene carbon black, binder PVDF is according to mass ratio
80：12：8 ratios are uniformly mixed, and -2 pyrrolidones ball milling of suitable 1- methyl is added is made into slurry within 1 hour and be evenly coated in aluminium flake
On, positive plate is made in drying, tabletting.Be assembled into 2032 button cells by cathode of metal lithium sheet, using Siken test system into
Row electric performance test (charging/discharging voltage is 2.75~4.3V, and high voltage charging/discharging voltage is 2.75~4.4V).
The result shows that the lithium battery being mixed with is in 0.1C multiplying powers, discharge capacity is 190.2mAh/g for the first time, and head effects are
82%, capacity retention ratio is 93% after 50 cycles under 1C multiplying powers.
Embodiment three：
(3.1) 100g Ni are weighed0.60Co0.20Mn0.20(OH)2The Y of presoma, 0.1% doping2O3(0.127g) with
La2O3(0.117g) is added after mixing, by hydroxide lithium salts and precursor powder according to Li/ (Ni+Co+Mn)=1.01:
1.1 are added to the mixing of high speed blender.500 DEG C of low-temperature sintering 240min under the atmosphere of oxygen are burnt being warming up to 900 DEG C of high temperature
720min is tied, 600 DEG C of heat preservation 120min are cooled to, is naturally cooling to obtain once sintered Y/La doping matrix materials after 100 DEG C
Material.
(3.2) the once sintered Y/La doping basis materials of 100g mono- are added to 40 DEG C, stirred in 50g deionized waters
10min instills the Co salt of 1mol/L, stirs filtration washing after 10min, and after Rotary Evaporators dynamic dries 60min, 120 DEG C true
After empty drying box drying 480min, 700 DEG C of double sintering 10h under the atmosphere of oxygen are naturally cooling to 100 DEG C, obtain cobalt acid
The positive electrode of lithium cladding.
(3.3) boron oxide of the positive electrode and 0.1% mass ratio that coat 100g cobalt acid lithiums after mixing, in air
The lower 250 DEG C of sintering 12h of atmosphere, be naturally cooling to 100 DEG C, obtain the nickel-cobalt-manganese ternary anode materials that coat altogether of Y/La doping Co/B
Material.
(3.4) it makes button cell and tests electrical property.
By the positive electrode Ni of the Y/La doping Co/B claddings of system0.60Co0.20Mn0.20With conductive agent acetylene carbon black, binder
PVDF is according to mass ratio 80：12：8 ratios are uniformly mixed, and -2 pyrrolidones ball milling of suitable 1- methyl is added and is made into slurry within 1 hour
It is evenly coated on aluminium flake, positive plate is made in drying, tabletting.2032 button cells are assembled by cathode of metal lithium sheet, are used
Siken test system carry out electric performance test (charging/discharging voltage be 2.75~4.3V, high voltage charging/discharging voltage be 2.75~
4.4V)。
The result shows that the lithium battery being mixed with is in 0.1C multiplying powers, discharge capacity is 179.3mAh/g for the first time, and head effects are
90.2%, capacity retention ratio is 98.8% after 50 cycles under 1C multiplying powers.
Comparative example three：
(3.1) 100g Ni are weighed0.60Co0.20Mn0.20(OH)2After presoma, by lithium hydroxide and precursor powder according to
Li/ (Ni+Co+Mn)=1.01:1.1 are added to the mixing of high speed blender.500 DEG C of low-temperature sinterings under the atmosphere of oxygen
240min is being warming up to 900 DEG C of high temperature sintering 720min, is cooled to 600 DEG C of heat preservation 120min, after being naturally cooling to 100 DEG C
To once sintered positive electrode.
(3.2) by positive electrode once sintered 100g under the atmosphere of oxygen 600 DEG C of double sintering 10h, Temperature fall
To 100 DEG C, common anode material for lithium-ion batteries is obtained.
(3.3) it makes button cell and tests electrical property.
By common positive electrode Ni0.60Co0.20Mn0.20With conductive agent acetylene carbon black, binder PVDF is according to mass ratio
80：12：8 ratios are uniformly mixed, and -2 pyrrolidones ball milling of suitable 1- methyl is added is made into slurry within 1 hour and be evenly coated in aluminium flake
On, positive plate is made in drying, tabletting.Be assembled into 2032 button cells by cathode of metal lithium sheet, using Siken test system into
Row electric performance test (charging/discharging voltage is 2.75~4.3V, and high voltage charging/discharging voltage is 2.75~4.4V).
The result shows that the lithium battery being mixed with is in 0.1C multiplying powers, discharge capacity is 173.6mAh/g for the first time, and head effects are
84.1%, capacity retention ratio is 91.2% after 50 cycles under 1C multiplying powers.
The results are shown in table below for the last test of above three embodiments and comparative example：
Discharge cycles curve at 2.75V to 4.3V voltages under 1C multiplying powers of embodiment one and comparative example one as shown in Figure 1,
As can be seen that embodiment one is total to the positive electrode that clad anode material is not coated than comparative example one by cobalt boron prepares battery
Capacity retention ratio significantly improves.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (8)
1. a kind of nickel-cobalt-manganternary ternary anode material preparation method that Y/La doping Co/B is coated altogether, which is characterized in that the method
Including：
Step S1, nickel cobalt manganese presoma is weighed；
Step S2, according to nickel in nickel cobalt manganese presoma, cobalt, manganese tenor it is anticipated that ratio weigh it is a certain amount of containing Y and
The compound of La and a certain amount of Li source compound；
Step S3, the compound containing Y and La high speed is added to mix together with nickel cobalt manganese presoma and Li source compound
It is sufficiently mixed in glassware, is then calcined, obtain doping basis material；
Step S4, the doping basis material is add to deionized water and is stirred evenly, cobalt salt is then added dropwise and continues to stir, obtains
The positive electrode slurries coated to cobalt hydroxide；
Step S5, the positive electrode slurries are filtered, washed, dry obtain cobalt hydroxide cladding positive electrode powder；
Step S6, the positive electrode powder that the cobalt hydroxide coats is mixed with lithium salts and is carried out double sintering, obtain cobalt acid
The positive electrode of lithium cladding；
Step S7, the positive electrode that source compound containing B is coated with the cobalt acid lithium is added in high speed blender and is sufficiently mixed,
Then it is calcined, obtains the nickel-cobalt-manganternary ternary anode material that Y/La doping Co/B is coated altogether.
2. the nickel-cobalt-manganternary ternary anode material preparation method that Y/La doping Co/B as described in claim 1 is coated altogether, feature exist
In in step S2, the incorporation mole of Y, La are the 0.001- of nickel, cobalt, manganese Metal moles total number in nickel cobalt manganese presoma
0.1%, the compound containing Y and La is one or more of oxide, carbonate and the nitrate of Y, La, the lithium source
The amount of compound Li in molar ratio：Me=0.9-1.1:1 calculates, and wherein Me is nickel, cobalt, manganese Metal mole in nickel cobalt manganese presoma
Total amount.
3. the nickel-cobalt-manganternary ternary anode material preparation method that Y/La doping Co/B as claimed in claim 2 is coated altogether, feature exist
In in the calcination process of step S3, calcination temperature is 700 DEG C -900 DEG C, calcination time 10-25h.
4. the nickel-cobalt-manganternary ternary anode material preparation method that Y/La doping Co/B as claimed in claim 3 is coated altogether, feature exist
In the cobalt salt that step S4 is added dropwise is one or more of cobaltous sulfate, cobalt acetate, cobalt oxalate, cobalt nitrate, cobalt chloride, cobalt member
The covering amount of element is 1000-5000ppm.
5. the nickel-cobalt-manganternary ternary anode material preparation method that Y/La doping Co/B as claimed in claim 4 is coated altogether, feature exist
In in the sintering process of step S6, sintering temperature is 600 DEG C -800 DEG C, sintering time 6h-12h.
6. the nickel-cobalt-manganternary ternary anode material preparation method that Y/La doping Co/B as claimed in claim 5 is coated altogether, feature exist
In in step S7, the B source compounds are containing one or both of boron oxide compound, boric acid, and the covering amount of B element is 1000-
3000ppm。
7. the nickel-cobalt-manganternary ternary anode material preparation method that Y/La doping Co/B as claimed in claim 6 is coated altogether, feature exist
In in the calcination process of step S7, calcination temperature is 200 DEG C -400 DEG C, calcination time 6h-12h.
8. a kind of nickel-cobalt-manganternary ternary anode material that Y/La doping Co/B is coated altogether, which is characterized in that its internal layer is that Y and La is adulterated
Doping basis material, outer layer is the clad that coats altogether of Co and B, and the nickel-cobalt-manganese ternary that the Y/La doping Co/B is coated altogether is just
Pole material uses any one of claim 1-7 the method to be such as prepared.
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