CN109950532A - A kind of efficient impurity removal method of ternary battery material - Google Patents
A kind of efficient impurity removal method of ternary battery material Download PDFInfo
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- CN109950532A CN109950532A CN201910089477.4A CN201910089477A CN109950532A CN 109950532 A CN109950532 A CN 109950532A CN 201910089477 A CN201910089477 A CN 201910089477A CN 109950532 A CN109950532 A CN 109950532A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Y02W30/84—Recycling of batteries or fuel cells
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Abstract
The invention discloses a kind of efficient impurity removal methods of ternary battery material, belong to ternary battery material technical field, a kind of efficient impurity removal method of ternary battery material, the following steps are included: disassembling decladding under the atmosphere of protective gas obtains tertiary cathode material, by the present invention in that using lithium hydroxide (LiOH) as the alkali leaching solution in tertiary cathode material treatment process and the highly basic precipitating reagent in ternary precursor synthesis process, not only there is alkaline effect identical with sodium hydroxide, guarantee being normally carried out for technique, new foreign ion will not be introduced into material simultaneously, compared to more in the prior art in such a way that sodium hydroxide (NaOH) is as alkali leaching solution and precipitating reagent, the present invention has cut off the largest source of sodium ion in reaction system, the addition of sodium ion is controlled from the root, make sodium ion in liquor impurity Content is significantly reduced, and significantly improves the impurity-eliminating effect in ternary battery material preparation process.
Description
Technical field
The present invention relates to ternary battery material technical fields, more specifically to a kind of the efficient of ternary battery material
Impurity-removing method.
Background technique
New-energy automobile is the direction of future automobile development, and power battery is that new-energy automobile is different from conventional fuel oil vapour
The important component of vehicle.Tertiary cathode material is because have many advantages, such as that energy density is high, environmental-friendly, cheap and becomes
Hot spot concerned by people.It can pass through high temperature solid-state method, sol-gal process, spray drying process, hydro-thermal method and co-precipitation
The synthesis of the serial of methods such as method.And wherein coprecipitation is widely used in industrial production due to a variety of advantages.
In conventional co-precipitation preparation process, what is synthesized first is the presoma of ternary material, wherein before hydroxide
It is most commonly seen to drive body.It is reacted under the action of complexing agent by the soluble salt of metallic element with highly basic precipitating reagent, before generation
Drive body.Most common soluble metallic salt is sulfate, and highly basic is sodium hydroxide, to exist in the reaction system a large amount of
Sodium ion and sulfate ion.Due to their solubility, to industrially be typically all after the completion of reaction with largely going
Ionized water carries out washing impurity elimination to it.
Containing valuable metals elements such as a large amount of nickel, cobalt, manganese, iron in ternary waste and old lithium ion battery, have good time
Value is received, therefore recycles waste lithium cell tertiary cathode material and can be used for preparing ternary material precursor, realizes holding for the energy
It is continuous to utilize.
Known Chinese patent discloses a kind of entitled " side for removing lithium ion battery ternary material precursor impurity of patent
Method " patent of invention, application No. is CN201710178686.7, a kind of removal lithium ion battery ternary material precursor impurity
Method, include the following steps, step 1: lithium ion battery ternary material precursor slurry be made in coprecipitation and stands and sinks
Drop is layered the slurry, releases supernatant and obtains precipitate slurry；Step 2: it is slowly added into obtained precipitate slurry
Organic solvent generates crystalline material at once, and after crystalline material is precipitated completely, standing is completed to form crystal grain to crystal growth, by institute
The mixture solution filtration drying obtained, filtrate recycle organic solvent recycling, this patent is compared with prior art, beneficial to imitate
Fruit is: by be added into ternary material precursor feed liquid can with water with arbitrary proportion dissolve each other alcohol, aldehyde, in ketone it is a kind of or several
After the organic solvent of kind, standing and the method impurity elimination separated admittedly admittedly；It may make by each step collaboration processing of above scheme
The impurities in water element (especially sodium ion and sulfate ion) for being largely dissolved in slurry is precipitated with precipitating crystalline, until can
Admittedly admittedly being separated；The solution of the present invention can be solved effectively during existing precursor preparation in presoma impurity washing process
Process is cumbersome, and environmental pressure is big, impurity removal the problems such as being not thorough, and the solution of the present invention due to process it is simple, it is easy to operate,
Be advantageous to industrialize into.
Sodium ion the largest source in tertiary cathode material is the sodium hydroxide highly basic precipitating reagent being added, but above-mentioned application number
For disclosed in CN201710178686.7 it is a kind of remove lithium ion battery ternary material precursor impurity method only indirectly from
Sodium ion is removed in solution, there is no the sources for controlling sodium ion.
Summary of the invention
1. technical problems to be solved
Aiming at the problems existing in the prior art, efficiently removing the purpose of the present invention is to provide a kind of ternary battery material
Miscellaneous method, before it soaks solution and ternary as the alkali in tertiary cathode material treatment process by using lithium hydroxide (LiOH)
Drive body synthesis process in highly basic precipitating reagent, not only have it is identical with sodium hydroxide alkalinity effect, guarantee technique it is normal into
Row, while new foreign ion will not be introduced into material, sodium hydroxide (NaOH) conduct is used compared to more in the prior art
Alkali soaks the mode of solution and precipitating reagent, and the present invention has cut off the largest source of sodium ion in reaction system, controlled sodium from the root
The addition of ion reduces sodium ion in liquor impurity content significantly, significantly improves in ternary battery material preparation process
Impurity-eliminating effect.
2. technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
A kind of efficient impurity removal method of ternary battery material, comprising the following steps:
S1, after waste and old ternary lithium battery is carried out safe-discharge processing, decladding is disassembled under the atmosphere of protective gas and is obtained
To tertiary cathode material；
S2, concentration is used to soak tertiary cathode material for 20% lithium hydroxide (LiOH) solution alkali, using dioctylphosphoric acid ester
It is extracted, is tentatively cleaned, remove the impurity such as Fe ion, Cu ion, Al ion, Ca ion and the Mg ion in material,
Mixed solution one, the mixed solution that sulfuric acid and hydrogen peroxide are added into mixed solution one are restored, obtain containing Ni from
The mixed solution two of son, Co ion and Mn ion；
S3, lithium hydroxide (LiOH) is added into mixed solution two to solution alkaline, sulfuric acid is then added into solution
Manganese or cobalt sulfate solution adjust the molar ratio of Ni ion in solution, Co ion and Mn ion and lead to 1:1:1, then into solution
Enter ammonia, is settled out nickel, cobalt, manganese ternary precursor, is filtered after standing sedimentation, obtain level-one ternary precursor precipitate slurry；
S4, organic solvent is added into level-one ternary precursor precipitate slurry, generates crystalline material at once, crystalline material is complete
After full precipitation, standing is completed to form crystal grain to crystal growth, and resulting mixture solution is filtered, mixed precipitation slurry and filter are obtained
Liquid will be separated admittedly after the drying of mixed precipitation slurry, carry out secondary removal of impurities, obtain second level ternary precursor precipitate slurry；
S5, into second level ternary precursor precipitate slurry, addition lithium carbonate is fully ground, and mixture is obtained, by mixture
It is put into crucible, and is compressed mixture by pressurizeing, then crucible is put into temperature programmed control chamber type electric resistance furnace, carry out high temperature
Sintering, synthesis in solid state obtain final ternary cell positive material.
Before soaking solution and ternary as the alkali in tertiary cathode material treatment process by using lithium hydroxide (LiOH)
Drive body synthesis process in highly basic precipitating reagent, not only have it is identical with sodium hydroxide alkalinity effect, guarantee technique it is normal into
Row, while new foreign ion will not be introduced into material, sodium hydroxide (NaOH) conduct is used compared to more in the prior art
Alkali soaks the mode of solution and precipitating reagent, and the present invention has cut off the largest source of sodium ion in reaction system, controlled sodium from the root
The addition of ion reduces sodium ion in liquor impurity content significantly, significantly improves in ternary battery material preparation process
Impurity-eliminating effect.
Further, the pH value of the mixed solution one is 8-14, can be utmostly by the aobvious alkalinity of mixed solution one
The impurity such as Fe ion, Cu ion, Al ion, Ca ion and Mg ion in upper removal material, it is ensured that the adequacy tentatively to clean
And validity.
Further, the pH value of the mixed solution two is 1-6, can be protected by this aobvious acid feature of mixed solution two
It demonstrate,proves the sulfuric acid being added and hydrogen peroxide is excessive, it is ensured that the adequacy of reduction reaction.
Further, the organic solvent is its in methanol, ethyl alcohol, ethylene glycol, glycerine, formaldehyde, acetaldehyde or acetone
Middle one kind reduces the foreign ions such as sulfate ion, iron ion, copper ion molten by the characteristic that organic solvent is soluble easily in water
The solubility of liquid carries out separation removal so that foreign ion is precipitated in the form of crystal.
Further, the volume ratio of the level-one ternary precursor precipitate slurry and organic solvent is 1:1.5, uses excess
Organic solvent for ensuring that foreign ion carries out crystallization precipitation to the full extent, it is ensured that the adequacy of secondary removal of impurities and effectively
Property.
Further, the processing method of the filtrate are as follows: filtrate is subjected to distillation processing, recycle evaporate it is organic molten
Agent carries out recycling organic solvent using the evaporable characteristic of organic solvent low boiling point from filtrate, realizes that the sustainable of resource follows
Ring utilizes.
Further, the solid separation uses vibrating screen partition method, and vibrating screen is using past caused by oscillator exciting
Again rotation type vibration and work, due to the vibration of screen frame (unit), when mixed precipitation slurry is flowed on compass screen surface, thicker impurity particle is just stayed
It being discharged on compass screen surface, and along inclined-plane from one end, thinner granular precursor and slurry pass through sieve pore together and flow to mud pit, from
And realize separation impurity and precursor pulp.
Further, the volume ratio 1:1.2 of the second level ternary precursor precipitate slurry and lithium carbonate obtains sintering
Ternary cell positive material performance is more preferably.
Further, the granularity of the level-one ternary precursor precipitate slurry is less than 15 microns, when level-one ternary precursor
When the granularity of precipitate slurry is excessive, adverse effect can be generated to the quality of presoma, to be easy to influence ternary material obtained
Quality.
Further, the partial size of the crystal grain is not less than 50 microns, and the partial size of impurity crystal grain is bigger, then itself and level-one ternary
The size gap of presoma precipitate slurry is bigger, and accuracy when allowing to carry out separation admittedly is higher, the second level three of acquisition
Impurity content in first presoma precipitate slurry is fewer, it is ensured that the adequacy and validity of removal of impurities.
3. beneficial effect
Compared with the prior art, the present invention has the advantages that
(1) this programme by using lithium hydroxide (LiOH) as in tertiary cathode material treatment process alkali leaching solution with
And the highly basic precipitating reagent in ternary precursor synthesis process, not only there is alkaline effect identical with sodium hydroxide, guarantee technique
Be normally carried out, while new foreign ion will not be introduced into material, use sodium hydroxide compared to more in the prior art
(NaOH) mode as alkali leaching solution and precipitating reagent, the present invention has cut off the largest source of sodium ion in reaction system, from root
The addition that sodium ion is controlled on source, reduces sodium ion in liquor impurity content significantly, significantly improves ternary battery material
Impurity-eliminating effect in preparation process.
(2) pH value of mixed solution one is 8-14, by the aobvious alkalinity of mixed solution one, can remove material to the full extent
In the impurity such as Fe ion, Cu ion, Al ion, Ca ion and Mg ion, it is ensured that the adequacy and validity tentatively to clean.
(3) pH value of mixed solution two is 1-6, can guarantee the sulphur being added by this aobvious acid feature of mixed solution two
Acid and hydrogen peroxide are excessive, it is ensured that the adequacy of reduction reaction.
(4) organic solvent is the one of which in methanol, ethyl alcohol, ethylene glycol, glycerine, formaldehyde, acetaldehyde or acetone, is passed through
Organic solvent characteristic soluble easily in water, reduce sulfate ion, iron ion, the foreign ions such as copper ion solution solubility,
So that foreign ion is precipitated in the form of crystal, separation removal is carried out.
(5) volume ratio of level-one ternary precursor precipitate slurry and organic solvent is 1:1.5, uses excessive organic solvent
For ensuring that foreign ion carries out crystallization precipitation to the full extent, it is ensured that the adequacy and validity of secondary removal of impurities.
(6) processing method of filtrate are as follows: filtrate is subjected to distillation processing, recycles the organic solvent evaporated, utilization is organic
The low evaporable characteristic of solvent boiling point, carries out recycling organic solvent from filtrate, realizes that the sustainable of resource recycles.
(7) solid separation uses vibrating screen partition method, and vibrating screen is vibrated using reciprocating rotary type caused by oscillator exciting
And work, due to the vibration of screen frame (unit), when mixed precipitation slurry is flowed on compass screen surface, thicker impurity particle is left on compass screen surface,
And be discharged along inclined-plane from one end, thinner granular precursor and slurry pass through sieve pore together and flow to mud pit, divide to realize
From impurity and precursor pulp.
(8) the volume ratio 1:1.2 of second level ternary precursor precipitate slurry and lithium carbonate, the ternary battery for obtaining sintering is just
Pole material property is more preferably.
(9) granularity of level-one ternary precursor precipitate slurry is less than 15 microns, when level-one ternary precursor precipitate slurry
When granularity is excessive, adverse effect can be generated to the quality of presoma, to be easy to influence the quality of ternary material obtained.
(10) partial size of crystal grain is not less than 50 microns, and the partial size of impurity crystal grain is bigger, then it is heavy with level-one ternary precursor
The size gap of shallow lake slurry is bigger, and accuracy when allowing to carry out separation admittedly is higher, the second level ternary precursor of acquisition
Impurity content in precipitate slurry is fewer, it is ensured that the adequacy and validity of removal of impurities.
Detailed description of the invention
Fig. 1 is flow chart of the invention；
Fig. 2 is that experimental data of the invention acquires figure.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention；Technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description；Obviously；Described embodiments are only a part of the embodiments of the present invention；Instead of all the embodiments, it is based on
Embodiment in the present invention；It is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment；It shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the instruction such as term " on ", "lower", "inner", "outside", " top/bottom end "
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention and simplification retouch
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.In addition, term " first ", " second " are used for description purposes only, and cannot understand
For indication or suggestion relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " is set
Be equipped with ", " be arranged/connect ", " connection " etc., shall be understood in a broad sense, such as " connection ", may be a fixed connection, be also possible to removable
Connection is unloaded, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be in
Between medium be indirectly connected, can be the connection inside two elements.It for the ordinary skill in the art, can be specific
Situation understands the concrete meaning of above-mentioned term in the present invention.
Embodiment 1:
Referring to Fig. 1, a kind of efficient impurity removal method of ternary battery material, comprising the following steps:
S1, after waste and old ternary lithium battery is carried out safe-discharge processing, decladding is disassembled under the atmosphere of protective gas and is obtained
To tertiary cathode material；
S2, concentration is used to soak tertiary cathode material for 20% lithium hydroxide (LiOH) solution alkali, using dioctylphosphoric acid ester
It is extracted, is tentatively cleaned, remove the impurity such as Fe ion, Cu ion, Al ion, Ca ion and the Mg ion in material,
Mixed solution one, the mixed solution that sulfuric acid and hydrogen peroxide are added into mixed solution one are restored, obtain containing Ni from
The mixed solution two of son, Co ion and Mn ion；
S3, lithium hydroxide (LiOH) is added into mixed solution two to solution alkaline, sulfuric acid is then added into solution
Manganese or cobalt sulfate solution adjust the molar ratio of Ni ion in solution, Co ion and Mn ion and lead to 1:1:1, then into solution
Enter ammonia, is settled out nickel, cobalt, manganese ternary precursor, is filtered after standing sedimentation, obtain level-one ternary precursor precipitate slurry；
S4, organic solvent is added into level-one ternary precursor precipitate slurry, generates crystalline material at once, crystalline material is complete
After full precipitation, standing is completed to form crystal grain to crystal growth, and resulting mixture solution is filtered, mixed precipitation slurry and filter are obtained
Liquid will be separated admittedly after the drying of mixed precipitation slurry, carry out secondary removal of impurities, obtain second level ternary precursor precipitate slurry；
S5, into second level ternary precursor precipitate slurry, addition lithium carbonate is fully ground, and mixture is obtained, by mixture
It is put into crucible, and is compressed mixture by pressurizeing, then crucible is put into temperature programmed control chamber type electric resistance furnace, carry out high temperature
Sintering, synthesis in solid state obtain final ternary cell positive material.
The pH value of mixed solution one is 9, by the aobvious alkalinity of mixed solution one, can remove the Fe in material to the full extent
The impurity such as ion, Cu ion, Al ion, Ca ion and Mg ion, it is ensured that the adequacy and validity tentatively to clean.
The pH value of mixed solution two is 5, by this aobvious acid feature of mixed solution two can guarantee the sulfuric acid being added and
Hydrogen peroxide is excessive, it is ensured that the adequacy of reduction reaction.
Organic solvent is the one of which in methanol, ethyl alcohol, ethylene glycol, glycerine, formaldehyde, acetaldehyde or acetone, by having
Solvent characteristic soluble easily in water, reduce sulfate ion, iron ion, the foreign ions such as copper ion solution solubility, from
And foreign ion is precipitated in the form of crystal, carry out separation removal.
The volume ratio of level-one ternary precursor precipitate slurry and organic solvent is 1:1.5, is used using excessive organic solvent
In ensuring that foreign ion carries out crystallization precipitation to the full extent, it is ensured that the adequacy and validity of secondary removal of impurities.
The processing method of filtrate are as follows: filtrate is subjected to distillation processing, the organic solvent evaporated is recycled, utilizes organic solvent
The evaporable characteristic of low boiling point, carries out recycling organic solvent from filtrate, realizes that the sustainable of resource recycles.
Gu Gu separation uses vibrating screen partition method, and vibrating screen is to utilize the vibration work of reciprocating rotary type caused by oscillator exciting
Make, due to the vibration of screen frame (unit), when mixed precipitation slurry is flowed on compass screen surface, thicker impurity particle is left on compass screen surface, and edge
Inclined-plane is discharged from one end, and thinner granular precursor and slurry pass through sieve pore together and flow to mud pit, to realize that separation is miscellaneous
Matter and precursor pulp.
The volume ratio 1:1.2 of second level ternary precursor precipitate slurry and lithium carbonate, the ternary anode for obtaining sintering
Material property is more preferably.
The granularity of level-one ternary precursor precipitate slurry is less than 15 microns, when the granularity of level-one ternary precursor precipitate slurry
When excessive, adverse effect can be generated to the quality of presoma, to be easy to influence the quality of ternary material obtained.
The partial size of crystal grain is not less than 50 microns, and the partial size of impurity crystal grain is bigger, then it precipitates with level-one ternary precursor and starches
The size gap of material is bigger, and accuracy when allowing to carry out separation admittedly is higher, the second level ternary precursor precipitating of acquisition
Impurity content in slurry is fewer, it is ensured that the adequacy and validity of removal of impurities.
Comparative example: using the step in embodiment 1, the lithium hydroxide (LiOH) in S2 and S3 is substituted for sodium hydroxide
(NaOH), preparation ternary cell positive material is carried out.
Referring to Fig. 2, by ICP emission spectrometry to the mixed solution after the preliminary removal of impurities in embodiment 1 and comparative example
One and secondary removal of impurities after second level ternary precursor precipitate slurry in impurity analyzed, measure the content of impurity element.
Before soaking solution and ternary as the alkali in tertiary cathode material treatment process by using lithium hydroxide (LiOH)
Drive body synthesis process in highly basic precipitating reagent, not only have it is identical with sodium hydroxide alkalinity effect, guarantee technique it is normal into
Row, while new foreign ion will not be introduced into material, sodium hydroxide (NaOH) conduct is used compared to more in the prior art
Alkali soaks the mode of solution and precipitating reagent, and the present invention has cut off the largest source of sodium ion in reaction system, controlled sodium from the root
The addition of ion reduces sodium ion in liquor impurity content significantly, significantly improves in ternary battery material preparation process
Impurity-eliminating effect.
It is described above；It is merely preferred embodiments of the present invention；But scope of protection of the present invention is not limited thereto；
Anyone skilled in the art is in the technical scope disclosed by the present invention；According to the technique and scheme of the present invention and its
It improves design and is subject to equivalent substitution or change；It should be covered by the scope of protection of the present invention.
Claims (10)
1. a kind of efficient impurity removal method of ternary battery material, which comprises the following steps:
S1, after waste and old ternary lithium battery is carried out safe-discharge processing, decladding is disassembled under the atmosphere of protective gas and obtains three
First positive electrode；
S2, it uses concentration to soak tertiary cathode material for 20% lithium hydroxide (LiOH) solution alkali, is carried out using dioctylphosphoric acid ester
Extraction, is tentatively cleaned, and is removed the impurity such as Fe ion, Cu ion, Al ion, Ca ion and the Mg ion in material, is obtained mixed
Solution one is closed, sulfuric acid is added into mixed solution one and the mixed solution of hydrogen peroxide is restored, obtains containing Ni ion, Co
The mixed solution two of ion and Mn ion；
S3, lithium hydroxide (LiOH) is added into mixed solution two to solution alkaline, be then added into solution manganese sulfate or
Cobalt sulfate solution adjusts the molar ratio of Ni ion in solution, Co ion and Mn ion to 1:1:1, then is passed through ammonia into solution
Gas is settled out nickel, cobalt, manganese ternary precursor, is filtered after standing sedimentation, obtains level-one ternary precursor precipitate slurry；
S4, organic solvent is added into level-one ternary precursor precipitate slurry, generates crystalline material at once, crystalline material is analysed completely
After out, standing is completed to form crystal grain to crystal growth, and resulting mixture solution is filtered, mixed precipitation slurry and filtrate are obtained,
It will be separated admittedly after the drying of mixed precipitation slurry, carry out secondary removal of impurities, obtain second level ternary precursor precipitate slurry；
S5, into second level ternary precursor precipitate slurry, addition lithium carbonate is fully ground, and obtains mixture, mixture is put into
In crucible, and mixture is compressed by pressurizeing, then crucible is put into temperature programmed control chamber type electric resistance furnace, carries out high temperature burning
Knot, synthesis in solid state obtain final ternary cell positive material.
2. a kind of efficient impurity removal method of ternary battery material according to claim 1, it is characterised in that: the mixing is molten
The pH value of liquid one is 8-14.
3. a kind of efficient impurity removal method of ternary battery material according to claim 1, it is characterised in that: the mixing is molten
The pH value of liquid two is 1-6.
4. a kind of efficient impurity removal method of ternary battery material according to claim 1, it is characterised in that: described organic molten
Agent is the one of which in methanol, ethyl alcohol, ethylene glycol, glycerine, formaldehyde, acetaldehyde or acetone.
5. a kind of efficient impurity removal method of ternary battery material according to claim 1, it is characterised in that: the level-one three
The volume ratio of first presoma precipitate slurry and organic solvent is 1:1.5.
6. a kind of efficient impurity removal method of ternary battery material according to claim 1, which is characterized in that the filtrate
Processing method are as follows: filtrate is subjected to distillation processing, recycles the organic solvent evaporated.
7. a kind of efficient impurity removal method of ternary battery material according to claim 1, it is characterised in that: described solid point
From using vibrating screen partition method.
8. a kind of efficient impurity removal method of ternary battery material according to claim 1, it is characterised in that: the second level three
The volume ratio 1:1.2 of first presoma precipitate slurry and lithium carbonate.
9. a kind of efficient impurity removal method of ternary battery material according to claim 1, it is characterised in that: the level-one three
The granularity of first presoma precipitate slurry is less than 15 microns.
10. a kind of efficient impurity removal method of ternary battery material according to claim 1, it is characterised in that: the crystal grain
Partial size be not less than 50 microns.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111282317A (en) * | 2020-03-11 | 2020-06-16 | 吕文广 | Method for removing solid particles in nickel-cobalt-manganese lithium salt and lithium battery material |
| CN111584820A (en) * | 2020-05-01 | 2020-08-25 | 深圳吉阳智能科技有限公司 | Efficient lithium ion battery slurry impurity removal device and system |
| CN111807421A (en) * | 2020-06-23 | 2020-10-23 | 湖南邦普循环科技有限公司 | Method for reducing sulfur content of precursor of nickel-cobalt-manganese ternary positive electrode material |
| CN114024048A (en) * | 2021-11-04 | 2022-02-08 | 中南大学 | Recovery method for lithium precipitation of lithium ion battery cathode |
| CN115709977A (en) * | 2022-11-22 | 2023-02-24 | 株洲冶炼集团股份有限公司 | Pretreatment method of retired lithium iron phosphate electrode powder |
-
2019
- 2019-01-30 CN CN201910089477.4A patent/CN109950532A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111282317A (en) * | 2020-03-11 | 2020-06-16 | 吕文广 | Method for removing solid particles in nickel-cobalt-manganese lithium salt and lithium battery material |
| CN111584820A (en) * | 2020-05-01 | 2020-08-25 | 深圳吉阳智能科技有限公司 | Efficient lithium ion battery slurry impurity removal device and system |
| CN111584820B (en) * | 2020-05-01 | 2024-07-16 | 深圳吉阳智能科技有限公司 | Efficient lithium ion battery slurry impurity removing device and system |
| CN111807421A (en) * | 2020-06-23 | 2020-10-23 | 湖南邦普循环科技有限公司 | Method for reducing sulfur content of precursor of nickel-cobalt-manganese ternary positive electrode material |
| CN114024048A (en) * | 2021-11-04 | 2022-02-08 | 中南大学 | Recovery method for lithium precipitation of lithium ion battery cathode |
| CN114024048B (en) * | 2021-11-04 | 2024-02-06 | 中南大学 | Recovery method for lithium ion battery negative electrode lithium precipitation |
| CN115709977A (en) * | 2022-11-22 | 2023-02-24 | 株洲冶炼集团股份有限公司 | Pretreatment method of retired lithium iron phosphate electrode powder |
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