CN109786736A - A kind of nickel cobalt rubidium manganate lithium material and its preparation method and application - Google Patents
A kind of nickel cobalt rubidium manganate lithium material and its preparation method and application Download PDFInfo
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- CN109786736A CN109786736A CN201811625513.6A CN201811625513A CN109786736A CN 109786736 A CN109786736 A CN 109786736A CN 201811625513 A CN201811625513 A CN 201811625513A CN 109786736 A CN109786736 A CN 109786736A
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Abstract
The invention discloses a kind of nickel cobalt rubidium manganate lithium material and its preparation method and application, the chemical formula of the nickelic tertiary cathode material of rubidium element doping is Li1‑xRbxNiyCozMn1‑y‑zO2Wherein y >=0.6,0 x≤0.1 <, 0 < z < 0.4, the preparation method of the nickelic tertiary cathode material of rubidium element doping includes the following steps: nickel-cobalt-manganese ternary material precursor, the source Li, the source Rb mixing acquisition mixture, prior to being pre-sintered under oxygen atmosphere after grinding, then high temperature sintering is carried out to get nickel cobalt rubidium manganate lithium material.Rubidium nickel cobalt rubidium manganate lithium material particle of the present invention is uniform, has micro-nano size, cationic mixing degree low, is used for lithium ion battery, gained lithium ion battery specific discharge capacity is high, and high rate performance is high, good cycle, long service life.
Description
Technical field
The present invention relates to a kind of nickel cobalt rubidium manganate lithium materials and its preparation method and application, belong to lithium ion cell positive material
Expect application field.
Background technique
Nowadays, lithium ion battery (LIBs) is because of its high-energy density, good cyclicity and original environment friendly
The advantages that and be widely used in portable electronic device, and to electric car application field develop.But with portable electronics
The development of the function enhancing and electric car of electric appliance, energy density, stability and the high rate performance of lithium ion battery increasingly cannot
Meet everybody needs.Therefore, the lithium ion battery of high-energy density, high circulation stability and high rate capability is researched and developed to alleviation
Energy shortage, improves environment, and developing national economy and safeguarding national security is of great significance.
The positive electrode of lithium ion battery be restrict battery capacity and cyclical stability key factor, it determine lithium from
The characteristic and price of sub- battery are the core and key of lithium ion battery technology, and restrict lithium ion battery large-scale promotion
The key of application.Nowadays common anode material for lithium-ion batteries is LiCoO2、LiMnO2/LiMn2O4、LiMePO4、
LiNixCoyAlzO2)(NCA)、LiNixCoyMnzO2(NCM).Wherein nickelic ternary NCM due to its specific capacity is high, have extended cycle life,
The advantages that having a safety feature, is cheap is considered as optimal positive electrode.
The mainstream selection for the anode material for lithium ion battery being commercialized at present is ternary material NCM.But since cobalt is
Expensive scarce resource limits a large amount of uses of the cobalt in positive electrode preparation, while the raising of nickel content can increase
Add the specific capacity of tertiary cathode material, so nickelic tertiary cathode material becomes inevitable choice.But nickelic ternary material
In there are oxygen defects and lithium nickel mixing phenomenon, and the material is sensitive to ambient humidity, more demanding to synthesis condition, prepares difficulty
It is larger.Furthermore the first circle efficiency for charge-discharge of tertiary cathode material is lower, limits further increasing for specific capacity.So nickelic three
First positive electrode applies the upper space still to make progress in productionization, and there are also problems demand solutions.
Currently, a kind of main stream approach for improving tertiary cathode material NCM chemical property is to carry out element doping.Commonly
Doped ions are several unit prices and multivalence foreign cation, such as Ag+、Na+、Co2+、Cu2+、Mg2+、Zn2+、Ba2+、Al3+、Fe3+、Cr3 +、Ga3+、Zr4+、Ti4+Deng and some nonmetallic ions (boron, fluorine).For example, Mg and Zn are most common+divalent doped chemicals,
Being doped into NCM can be such that material specific capacity is declined slightly later, but cycle life can greatly improve；Cr is relatively conventional+trivalent
Doped chemical, research finds that suitable doping can inhibit cationic mixing phenomenon, to improve specific capacity and cycle life；Ti
It is+4 valence elements, the variation of valence being not involved in material charge and discharge, but stabilizing material structural improvement material circulation can be passed through
Performance.
But above-described element doping modified method be all to polyhedral structure element doping in layer, i.e., to Ni, Co,
The doping of the position Mn, and doping effect is undesirable, can only make battery performance slightly improves or even to sacrifice certain performance
Another performance can be made to increase, be difficult have larger help to production practices application.
Summary of the invention
In view of the deficiencies of the prior art, the first purpose of this invention is to provide that a kind of particle is uniform, has micro-nano ruler
A kind of low nickel cobalt rubidium manganate lithium material of very little, cationic mixing degree.
Second object of the present invention is to provide a kind of preparation method of nickel cobalt rubidium manganate lithium material.
Third object of the present invention is to provide a kind of application of nickel cobalt rubidium manganate lithium material, by nickel cobalt rubidium manganate lithium material
Material is applied to lithium ion battery, and gained lithium ion battery specific discharge capacity is high, and high rate performance is high, good cycle, service life
It is long.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of nickel cobalt rubidium manganate lithium material of the present invention, the chemical formula of the nickel cobalt rubidium manganate lithium material are Li1- xRbxNiyCozMn1-y-zO2, wherein y >=0.6,0 < x≤0.1,0 < z < 0.4.
Preferred scheme, the chemical formula of the nickelic tertiary cathode material of rubidium element doping are Li1-xRbxNiyCozMn1-y- zO2, wherein y >=0.6,0 < x <, 0.03,0 < z < 0.4.
As further preferably, the chemical formula of the nickelic tertiary cathode material of rubidium element doping is Li1- xRbxNiyCozMn1-y-zO2, wherein y >=0.6,0 < x <, 0.01,0 < z < 0.4.
Technical solution of the present invention provides a kind of nickel cobalt rubidium manganate lithium material, and the material is obtained by Li doping,
Increase the interlayer of crystal using the biggish atomic size of alkali metal ion rubidium (Rb) for the doping vario-property of interlayer ion
Away from, so that the ability of the removal lithium embedded of positive electrode is improved, enhancing storage lithium performance and charging and discharging capabilities.
The chemical formula of preferred scheme, the nickel cobalt rubidium manganate lithium material is Li0.995Rb0.005Ni0.8Co0.1Mn0.1O2、
Li0.99Rb0.01Ni0.6Co0.2Mn0.2O2、Li0.97Rb0.03Ni0.6Co0.2Mn0.2O2In any one.
As a further preference, the chemical formula of the nickel cobalt rubidium manganate lithium material is
Li0.995Rb0.005Ni0.8Co0.1Mn0.1O2、Li0.99Rb0.01Ni0.6Co0.2Mn0.2O2In any one.
As further preferably, the chemical formula of the nickel cobalt rubidium manganate lithium material is
Li0.995Rb0.005Ni0.8Co0.1Mn0.1O2
Preferred scheme, the partial size of the nickel cobalt rubidium manganate lithium material are 2-20 μm.
A kind of preparation method of nickel cobalt rubidium manganate lithium material of the present invention, includes the following steps:
Nickel-cobalt-manganese ternary material precursor, the source Li, the source Rb are mixed and obtain mixture, is carried out under oxygen atmosphere after fine grinding
Sintering is first warming up to 350-500 DEG C, keeps the temperature 3-8h, then heats to 750-980 DEG C, keeps the temperature 8-15h to get nickel cobalt rubidium manganate
Lithium material.
Preferred scheme, in the mixture, according to the molar ratio, integral molar quantity ((Li+Rb): the Mn of Li element, Rb element
Element, Co element, Ni element integral molar quantity (Mn+Co+Ni)=1.02-1.06:1.
The additional amount in the source Li and rubidium source must be controlled effectively in the present invention, and Li element, the integral molar quantity of Rb element are opposite
It needs to slightly have excessively in the integral molar quantity of Mn element, Co element, Ni element, otherwise will cause element missing, make under battery performance
Drop.
As a further preference, in the mixture, according to the molar ratio, (Li+Rb): (Mn+Co+Ni)=1.04-
1.05:1。
Preferred scheme, in the mixture, according to the molar ratio, Rb:Li=0.001-0.1:0.9-0.999.
As a further preference, in the mixture, according to the molar ratio, Rb:Li=0.002-0.03:0.097-
0.998。
As more managing the preferred of a step, in the mixture, according to the molar ratio, Rb:Li=0.005-0.01:0.099-
0.995。
Inventors have found that the doping of rubidium is very big on the influence of the performance of material, if doping is too small, to material crystalline substance
Lattice parameter influences less, not having improved effect；If doping is excessive, the resistance of material can be made excessive, to make material
Electric property deteriorate.When rubidium doping is 0.5%-1%, the performance of resulting materials is more excellent, and especially doping is 0.5%
When, the performance of resulting materials is best.
Preferred scheme, the source Li are selected from LiOH, CH3COOLi、Li2CO3At least one of.
Preferred scheme, the source Rb are selected from RbOH, Rb2CO3At least one of.
Preferred scheme, the nickel-cobalt-manganese ternary material precursor can buy commercially available commercialization and pass through co-precipitation legal system
Standby nickel-cobalt-manganese ternary material precursor.
Preferred scheme, the nickel-cobalt-manganese ternary material precursor are prepared with the following method: by nickel-cobalt-manganese ternary material
In addition chemical formula design proportion matches with nickel sulfate solution, cobalt sulfate solution, manganese sulfate solution is taken and takes ammonium hydroxide, while reaction is added
Container obtains reaction solution, and the pH value for adjusting reaction solution is 9-12, and reaction obtains reactant, after drying up to nickel-cobalt-manganese ternary
Material.
Transition metal total ion concentration is 1-3mol/L in the transition metal sulfate.
In the present invention, transition metal total ion concentration, that is, nickel ion in transition metal sulfate, cobalt ions, manganese ion
Total concentration.
The concentration of the ammonium hydroxide is 1-3mol/L.
In the reaction solution, the volume ratio of ammonium hydroxide and transition metal salt solution is 1:3-6.
In the present invention, the volume of transition metal sulfate solution is that nickel sulfate solution, cobalt sulfate solution, manganese sulfate are molten
The total volume of liquid.
The temperature of the reaction is 40-60 DEG C, and the time of reaction is 10-24h.
The reactant is filtered, after being washed with water, the dry 12-24h at 50-90 DEG C.
Preferred scheme, the time of the fine grinding are 10-30min
Inventors have found that needing first to carry out fine grinding to precursor material, master is to make to be that material fills for the effect obtained
Dispersion, in the present invention, the purpose of fine grinding are to be sufficiently mixed reactant, convenient for the expansion between reactant in follow-up sintering
It dissipates, fine grinding can be ground using agate in the prior art, can also use ball mill ball milling.
Preferred scheme, the sintering procedure are first to be warming up to 400-500 DEG C with the heating rate of 1-3 DEG C/min, heat preservation
4-6h is warming up to 800-900 DEG C then with the heating rate of 1-2 DEG C/min, keeps the temperature 8-12h.
In the present invention, during the sintering process, need to carry out gradient sintering, first low-temperature sintering spreads material sufficiently, makes
The Material growth of subsequent high temperature sintering is complete, crystallinity is more preferable.Meanwhile also needing effectively to control heating rate, if heating rate
Too fast, it is insufficient also then to will lead to material diffusion, leads to that sintered product ingredient is uneven or sintered product structure is undesirable.
In the present invention, natural cooling is used after the completion of sintering.
A kind of application of nickel cobalt rubidium manganate lithium material of the present invention, is applied to using nickel cobalt rubidium manganate lithium material as positive electrode
In lithium ion battery.
The utility model has the advantages that
The present invention provides a kind of nickel cobalt rubidium manganate lithium material, the material is obtained by Li doping, that is, is directed to interlayer
The doping vario-property of ion increases the interlamellar spacing of crystal using the biggish atomic size of alkali metal ion rubidium (Rb), to improve
The ability of the removal lithium embedded of positive electrode, enhancing storage lithium performance and charging and discharging capabilities.The nickel cobalt rubidium manganate lithium material is used as lithium
Ion battery positive electrode has cationic mixing degree low, and specific discharge capacity is high, and high rate performance is high, good cycle, uses
The advantages that service life is long.
Nickel cobalt rubidium manganate lithium material particle of the invention is uniform, can control material with micro-nano size.
The equipment that preparation method of the invention needs to use is simple, and reaction condition is simple, effectively has large-scale industry raw
The application prospect of production.
Detailed description of the invention
Fig. 1 is the X ray diffracting spectrum of the nickel cobalt rubidium manganate lithium material prepared in 1-3 of the embodiment of the present invention；XRD result is aobvious
Show that the sample of this method synthesis belongs to the LiNiO of hexagonal crystal system2Crystal structure can determine that as pure single Li1- xRbxNiyCozMn1-y-zO2Ternary material.Cation ordering level index --- I (003)/I (104) is compared, respectively
1.3497 (0), 1.6437 (0.5%), 1.5600 (1%) and 1.5567 (3%).It can be seen that ratio can all increase when mixing Rb,
Mean that Li/Ni mixing degree declines, element ordering degree improves, and when Rb incorporation is 0.5%, ratio reaches most
Greatly, i.e., cationic mixing degree is minimum.
Fig. 2 is the chemical property figure of the nickel cobalt rubidium manganate lithium material prepared in 1-3 of the embodiment of the present invention.
Specific embodiment
Nickelic ternary material NCM811 presoma (Ni in following embodiment0.8Co0.1Mn0.1(OH)2) be all made of such as lower section
Method prepares:
Match the nickel sulfate solution, cobalt sulfate solution, manganese sulfate solution taken respectively by design proportion, and control transition metal from
The total concentration of son is that 4 kinds of solution are slowly injected into instead in addition with ammonium hydroxide (2mol/L) is taken using peristaltic pump coutroi velocity by 2mol/L
It answers in kettle.It obtains in reaction solution, and controlling the volume ratio of ammonium hydroxide and excessively lazy metal salt solution in reaction solution is 1:4.Use NaOH
(4mol/L) is 11 to the pH for controlling reaction solution.It is reacted under argon atmosphere.Reaction temperature is 50 DEG C.Reaction time is
16h.Solution is repeatedly filtered and is rinsed with water after reaction, is dried 18 hours at 80 DEG C later.Nickelic ternary material is made
Material precursor (Ni0.8Co0.1Mn0.1(OH)2)。
Embodiment 1
The target product of the present embodiment is Li0.995Rb0.005Ni0.8Co0.1Mn0.1O2。
By nickelic ternary material NCM811 presoma (Ni obtained0.8Co0.1Mn0.1(OH)2) and LiOH and Rb2CO3By change
It learns metering and obtains mixture than weighing to mix, in mixture, according to the molar ratio, (Li+Rb): (Ni+Co+Mn)=1.045, it mixes
It closes in object, according to the molar ratio, Rb:Li=0.005:0.995.
Then mixture is placed in tube furnace quartz ampoule center with being transferred in quartz boat after mortar grinder 30 minutes.To stone
English pipe vacuumizes and uses O2Quartz ampoule is full of by gas, and repetitive operation is three times.Adjustment gas flow is 200sccm (standard per minute
Milliliter).Ladder temperature sintering is carried out, 450 DEG C of pre-sintering 5h are first warming up to 3 DEG C/min, 860 DEG C of burnings are then warming up to 2 DEG C/min
Tie 10h.Room temperature, which is naturally cooled to, with furnace later obtains nickel cobalt rubidium manganate lithium material Li0.995Rb0.005Ni0.8Co0.1Mn0.1O2.Gained
The average grain diameter of nickel cobalt rubidium manganate lithium material is 14 μm.
The XRD sample that this method synthesizes as the result is shown belongs to the LiNiO of hexagonal crystal system from XRD diagram shown in Fig. 12Crystal knot
Structure can determine that as pure single Li1-xRbxNiyCozMn1-y-zO2Ternary material.Compare cation ordering level index ---
I (003)/I (104) can be far longer than 1.2, illustrate cation in the hope of I in the present embodiment (003)/I (104)=1.6437
Mixing degree is low.
And can see, in the present embodiment, I (003)/I (104) is also more bigger compared to other embodiments, illustrates mixing for Rb
Miscellaneous amount cation mixing degree at 0.5% is minimum.
It can be seen that from chemical property figure shown in Fig. 2.Under the conditions of 25 DEG C of room temperature, adulterate 0.5%Rb's
NCM811 under the current density of 1C, first circle specific discharge capacity is 163.2mAh/g, first compared to the comparative example 1 for not mixing rubidium
It encloses specific discharge capacity and promotes 30%.Up to must significantly rise.
Embodiment 2
The target product of the present embodiment is Li0.99Rb0.01Ni0.8Co0.1Mn0.1O2。
By nickelic ternary material NCM811 presoma (Ni obtained0.8Co0.1Mn0.1(OH)2) and LiOH and Rb2CO3By change
It learns metering and obtains mixture than weighing to mix, in mixture, according to the molar ratio, and (Li+Rb): (Ni+Co+Mn)=1.045:1,
In mixture, according to the molar ratio, n (Rb): n (Li)=0.01:0.99.
Then mixture is placed in tube furnace quartz ampoule center with being transferred in quartz boat after mortar grinder 30 minutes.To stone
English pipe vacuumizes and uses O2Quartz ampoule is full of by gas, and repetitive operation is three times.Adjustment gas flow is 200sccm (standard per minute
Milliliter).Ladder temperature sintering is carried out, 450 DEG C of pre-sintering 5h are first warming up to 3 DEG C/min, 860 DEG C of burnings are then warming up to 2 DEG C/min
Tie 10h.Room temperature, which is naturally cooled to, with furnace later obtains the nickelic ternary material Li of rubidium doping0.99Rb0.01Ni0.8Co0.1Mn0.1O2。
The XRD sample that this method synthesizes as the result is shown belongs to the LiNiO of hexagonal crystal system from XRD diagram shown in Fig. 12Crystal knot
Structure can determine that as pure single Li1-xRbxNiyCozMn1-y-zO2Ternary material.Compare cation ordering level index ---
I (003)/I (104) can be far longer than 1.2 in the hope of I in the present embodiment (003)/I (104)=1.5567, illustrate that cation is mixed
Scheduling degree is low.
It can be seen that from chemical property figure shown in Fig. 2.Under the conditions of 25 DEG C of room temperature, the NCM811 of 1%Rb is adulterated
Under the current density of 1C, first circle specific discharge capacity be 131.9mAh/g.
Embodiment 3
The target product of the present embodiment is Li0.97Rb0.03Ni0.8Co0.1Mn0.1O2。
By nickelic ternary material NCM811 presoma (Ni obtained0.8Co0.1Mn0.1(OH)2) and LiOH and Rb2CO3By change
It learns metering and obtains mixture than weighing to mix, in mixture, according to the molar ratio, (Li+Rb): (Ni+Co+Mn)=1.045, it mixes
It closes in object, according to the molar ratio, n (Rb): n (Li)=0.03:0.97.
Then mixture is placed in tube furnace quartz ampoule center with being transferred in quartz boat after mortar grinder 30 minutes.To stone
English pipe vacuumizes and uses O2Quartz ampoule is full of by gas, and repetitive operation is three times.Adjustment gas flow is 200sccm (standard per minute
Milliliter).Ladder temperature sintering is carried out, 450 DEG C of pre-sintering 5h are first warming up to 3 DEG C/min, 860 DEG C of burnings are then warming up to 2 DEG C/min
Tie 10h.Room temperature, which is naturally cooled to, with furnace later obtains the nickelic ternary material Li of rubidium doping0.97Rb0.03Ni0.8Co0.1Mn0.1O2。
The XRD sample that this method synthesizes as the result is shown belongs to the LiNiO of hexagonal crystal system from XRD diagram shown in Fig. 12Crystal knot
Structure can determine that as pure single Li1-xRbxNiyCozMn1-y-zO2Ternary material.Compare cation ordering level index ---
I (003)/I (104) can be far longer than 1.2 in the hope of I in the present embodiment (003)/I (104)=1.56, illustrate cationic mixing
Degree is low.
It can be seen that from chemical property figure shown in Fig. 2.Under the conditions of 25 DEG C of room temperature, the NCM811 of 3%Rb is adulterated
Under the current density of 1C, first circle specific discharge capacity be 128.3mAh/g.
It can be seen that when doping is up to 3%, although cationic mixing degree is low, first circle specific discharge capacity dilatation energy
Power reduces.
Comparative example 1
The target product of the present embodiment is LiNi0.8Co0.1Mn0.1O2。
By nickelic ternary material NCM811 presoma (Ni obtained0.8Co0.1Mn0.1(OH)2) and LiOH and Rb2CO3By change
It learns metering and obtains mixture than weighing to mix, in mixture, according to the molar ratio, Li:(Ni+Co+Mn)=1.045.Then it will mix
It closes object and is placed in tube furnace quartz ampoule center with being transferred in quartz boat after mortar grinder 30 minutes.Quartz ampoule is vacuumized and uses O2
Quartz ampoule is full of by gas, and repetitive operation is three times.Adjustment gas flow is 200sccm (standard milliliters per minute).Ladder temperature is carried out to burn
Knot is first warming up to 450 DEG C of pre-sintering 5h with 3 DEG C/min, is then warming up to 860 DEG C of sintering 10h with 2 DEG C/min.Certainly with furnace later
It is so cooled to room temperature and obtains the nickelic ternary material LiNi of rubidium doping0.8Co0.1Mn0.1O2。
From the XRD diagram of Fig. 1.It can be in the hope of I (003)/I (104)=1.3497, much smaller than the correlation of the product after doping
Value.
Fig. 2 is the chemical property of the undoped nickelic tertiary cathode material NCM811 prepared in comparative example of the present invention
Figure.Under the conditions of 25 DEG C of room temperature, undoped NCM811 under the current density of 1C, first circle specific discharge capacity is
125.3mAh/g。
Comparative example 2
Other conditions are identical as the embodiment of the present invention 1, are only not grind before sintering, the production obtained after being as a result sintered
Object, particle is uneven, and it is bad finally to measure chemical property.
Comparative example 3
Other conditions are identical as the embodiment of the present invention 1, only non-gradient increased temperature, but go straight up to 860 DEG C of heat preservation sinterings, as a result
The product obtained after being sintered, it is uneven particle equally occur, and it is bad finally to measure chemical property.
Comparative example 4
Other conditions are identical as the embodiment of the present invention 1, are only the heating rates that sintering process is all made of 10 DEG C/min, as a result
The product obtained after being sintered, it is uneven particle equally occur, and it is bad finally to measure chemical property.
Claims (10)
1. a kind of nickel cobalt rubidium manganate lithium material, it is characterised in that: the chemical formula of the nickel cobalt rubidium manganate lithium material is Li1- xRbxNiyCozMn1-y-zO2, wherein y >=0.6,0 < x≤0.1,0 < z < 0.4.
2. a kind of nickel cobalt rubidium manganate lithium material according to claim 1, it is characterised in that: the rubidium element doping nickelic three
The partial size of first positive electrode is 2-20 μm.
3. preparing a kind of method of nickel cobalt rubidium manganate lithium material as claimed in claim 1 or 2, it is characterised in that:
Nickel-cobalt-manganese ternary material precursor, the source Li, the source Rb are mixed and obtain mixture, is burnt under oxygen atmosphere after fine grinding
Knot is first warming up to 350-500 DEG C, keeps the temperature 3-8h, then heats to 750-980 DEG C, keeps the temperature 8-15h to get nickel cobalt rubidium manganate lithium
Material.
4. a kind of preparation method of nickel cobalt rubidium manganate lithium material according to claim 3, it is characterised in that: the mixture
In, according to the molar ratio, ((Li+Rb): (Mn+Co+Ni)=1.02-1.06:1.
5. a kind of preparation method of nickel cobalt rubidium manganate lithium material according to claim 3, it is characterised in that: the mixture
In, according to the molar ratio, Rb:Li=0.001-0.1:0.9-0.999.
6. a kind of preparation method of nickel cobalt rubidium manganate lithium material according to claim 3, it is characterised in that:
In the mixture, according to the molar ratio, Rb:Li=0.002-0.03:0.097-0.998.
7. a kind of preparation method of nickel cobalt rubidium manganate lithium material according to claim 3, it is characterised in that:
The source Li is selected from LiOH, CH3COOLi、Li2CO3At least one of；
The source Rb is selected from RbOH, Rb2CO3At least one of.
8. a kind of preparation method of nickel cobalt rubidium manganate lithium material according to claim 3, it is characterised in that: the nickel cobalt manganese
Ternary material precursor is prepared with the following method: by nickel-cobalt-manganese ternary materials chemistry formula design proportion with take nickel sulfate solution,
In addition cobalt sulfate solution, manganese sulfate solution match and take ammonium hydroxide, while reaction vessel is added, obtain reaction solution, adjust the pH of reaction solution
Value is 9-12, and reaction obtains reactant, after drying up to nickel-cobalt-manganese ternary material；
Transition metal total ion concentration is 1-3mol/L in the transition metal sulfate；
The concentration of the ammonium hydroxide is 1-3mol/L；
In the reaction solution, the volume ratio of ammonium hydroxide and transition metal sulfate solution is 1:3-6；
The temperature of the reaction is 40-60 DEG C, and the time of reaction is 10-24h.
9. a kind of preparation method of nickel cobalt rubidium manganate lithium material according to claim 3, the sintering procedure are, first with 1-
The heating rate of 3 DEG C/min is warming up to 400-500 DEG C, and heat preservation 4-6h is warming up to then with the heating rate of 1-2 DEG C/min
800-900 DEG C, keep the temperature 8-12h.
10. a kind of application of nickel cobalt rubidium manganate lithium material according to claims 1 to 2, it is characterised in that: by the nickel
Cobalt rubidium manganate lithium material is applied in lithium ion battery.
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| CN110364711A (en) * | 2019-07-08 | 2019-10-22 | 光鼎铷业(广州)集团有限公司 | A kind of nickel cobalt manganese anode material and preparation method thereof of gradient rubidium doping |
| CN110391416A (en) * | 2019-07-11 | 2019-10-29 | 光鼎铷业(广州)集团有限公司 | A kind of rubidium doping concentration gradient tertiary cathode material and preparation method thereof |
| CN110797527A (en) * | 2019-10-23 | 2020-02-14 | 昆明理工大学 | Modified lithium-rich manganese-based oxide cathode material and preparation method thereof |
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| CN110350171A (en) * | 2019-07-04 | 2019-10-18 | 光鼎铷业(广州)集团有限公司 | A kind of preparation method of the high ni-type tertiary cathode material of rubidium element doping |
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| CN110364711B (en) * | 2019-07-08 | 2020-07-31 | 光鼎铷业(广州)集团有限公司 | Gradient rubidium doped nickel-cobalt-manganese positive electrode material and preparation method thereof |
| CN110391416A (en) * | 2019-07-11 | 2019-10-29 | 光鼎铷业(广州)集团有限公司 | A kind of rubidium doping concentration gradient tertiary cathode material and preparation method thereof |
| CN113365950B (en) * | 2019-10-23 | 2023-06-20 | 株式会社Lg化学 | Method for preparing positive electrode active material precursor and positive electrode active material precursor |
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| CN110993937A (en) * | 2019-12-13 | 2020-04-10 | 武汉理工大学 | High-compaction-density and high-first-effect ternary cathode material and preparation method thereof |
| CN112201784A (en) * | 2020-09-28 | 2021-01-08 | 中航锂电技术研究院有限公司 | Positive electrode material, preparation method and application thereof |
| CN112201784B (en) * | 2020-09-28 | 2022-04-12 | 中创新航技术研究院(江苏)有限公司 | Positive electrode material, preparation method and application thereof |
| CN113735192A (en) * | 2021-01-05 | 2021-12-03 | 厦门厦钨新能源材料股份有限公司 | Lithium ion battery with low capacity loss |
| CN113437288B (en) * | 2021-06-29 | 2022-06-10 | 贝特瑞（江苏）新材料科技有限公司 | Positive electrode active material, preparation method thereof and lithium ion battery |
| CN113437288A (en) * | 2021-06-29 | 2021-09-24 | 贝特瑞（江苏）新材料科技有限公司 | Positive electrode active material, preparation method thereof and lithium ion battery |
| CN117101599A (en) * | 2023-08-04 | 2023-11-24 | 香港中文大学（深圳） | Lithium ion sieve adsorbent material and preparation method and application thereof |
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