CN111847529A - Method for removing sulfur content in hydroxide precursor - Google Patents
Method for removing sulfur content in hydroxide precursor Download PDFInfo
- Publication number
- CN111847529A CN111847529A CN202010716123.0A CN202010716123A CN111847529A CN 111847529 A CN111847529 A CN 111847529A CN 202010716123 A CN202010716123 A CN 202010716123A CN 111847529 A CN111847529 A CN 111847529A
- Authority
- CN
- China
- Prior art keywords
- washing
- slurry
- sulfur content
- removing sulfur
- precursor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002243 precursor Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 33
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000011593 sulfur Substances 0.000 title claims abstract description 30
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 title claims abstract description 17
- 238000005406 washing Methods 0.000 claims abstract description 68
- 239000002002 slurry Substances 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 230000032683 aging Effects 0.000 claims abstract description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 239000000047 product Substances 0.000 claims description 16
- 239000012065 filter cake Substances 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 7
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 7
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 claims description 7
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 claims description 7
- 239000012266 salt solution Substances 0.000 claims description 7
- 238000007873 sieving Methods 0.000 claims description 7
- 229910000361 cobalt sulfate Inorganic materials 0.000 claims description 6
- 229940044175 cobalt sulfate Drugs 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229940099596 manganese sulfate Drugs 0.000 claims description 6
- 239000011702 manganese sulphate Substances 0.000 claims description 6
- 235000007079 manganese sulphate Nutrition 0.000 claims description 6
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 claims description 6
- 229940053662 nickel sulfate Drugs 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 6
- 230000002431 foraging effect Effects 0.000 claims description 2
- 239000003513 alkali Substances 0.000 abstract description 17
- 239000012535 impurity Substances 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 9
- 239000002351 wastewater Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002245 particle Substances 0.000 description 9
- 239000010405 anode material Substances 0.000 description 6
- -1 nickel-cobalt-aluminum Chemical compound 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 239000012452 mother liquor Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005342 ion exchange Methods 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910000357 manganese(II) sulfate Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/006—Compounds containing, besides nickel, two or more other elements, with the exception of oxygen or hydrogen
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention relates to a method for removing sulfur content in a hydroxide precursor, which directly raises the pH value of slurry by changing the aging condition of the slurry so as to achieve the aim of controlling the content of S impurities in a product, greatly reduces alkali consumption and water consumption in the washing process, reduces the amount of waste water, simplifies the washing steps, and achieves the effects of reducing cost, improving production efficiency and reducing waste water discharge aiming at the problem that a large amount of water resources are consumed in the prior precursor sulfur removal process.
Description
Technical Field
The invention relates to a sulfur removal technology for a lithium battery anode material precursor, in particular to a method for removing sulfur content in a hydroxide precursor.
Background
With the rapid development of the electric automobile market, the power lithium ion battery is highly concerned by the industry as one of the core components. Since impurities adversely affect the safety performance, electrochemical performance, cycle life, etc. of the battery, the requirements of the positive electrode material for the power lithium ion battery on impurity control are very strict.
The precursor is an important raw material for producing the anode material of the lithium ion battery, and the impurity content of the precursor directly influences the electrochemical performance of the anode material. The precursor is synthesized by a wet method mainly in industry and is NiSO4、CoSO4、MnSO4Is mixed salt solution, liquid alkali is used as precipitator, and ammonia water is used as complexing agent. The synthesized precursor material contains a large amount of SO on the surface of particles and in the particles4 2-And SO remaining in the precursor4 2-The lithium ion battery anode material can enter the anode material in the anode calcining process to influence the performance of the anode material, and finally the battery capacity is reduced.
At present, the conventional process for removing sulfur and washing the precursor comprises mother liquor removal → alkali washing → water washing, namely, filtering the synthesized precursor, removing the mother liquor, then sequentially washing with liquid alkali and washing with hot pure water, and the process is used for absorbing SO on the surface of the precursor4 2-Has certain effect, the S content can be reduced to be within 2000ppm usually, but the steps are complicated, and the alkali consumption and the water consumption are large. 1 ton of precursor is prepared, and concentrated alkali is consumed for alkali washing to distribute water for about 6-7 m3The washing water is about 7 to 10m3(ii) a Sometimes, the precursor has very high sulfur content due to the change of synthesis parameters,in order to further reduce the sulfur content in the product to reach the target value, the product can only be washed by consuming a large amount of alkali liquor, pure water and time, thereby greatly increasing the preparation cost and the environmental burden.
Chinese patent CN107459069B discloses a method for reducing the sulfur content of a nickel-cobalt-aluminum precursor, which comprises the steps of removing mother liquor from the nickel-cobalt-aluminum precursor, transferring the nickel-cobalt-aluminum precursor into a washing kettle for pulp washing and water washing, drying and sieving to obtain the nickel-cobalt-aluminum precursor with the sulfur content less than or equal to 1000 ppm. However, the flow path is similar to the conventional method, and the consumption of alkali liquor and pure water is also high.
Therefore, it is urgently needed to develop a more effective washing method, which can control the S content in the product to meet the specification requirement, reduce the steps, reduce the alkali consumption, water consumption and wastewater discharge in the production process, and achieve the effects of reducing the cost, improving the production efficiency and reducing the wastewater discharge.
Disclosure of Invention
Aiming at the problem that the prior precursor desulphurization process consumes a large amount of water resources, the pH value of the slurry is directly raised by changing the aging condition of the slurry so as to achieve the purpose of controlling the content of S impurities in the product, greatly reduce the alkali consumption and water consumption in the washing process, reduce the amount of wastewater, simplify the washing steps, and achieve the effects of reducing the cost, improving the production efficiency and reducing the wastewater discharge.
The technical scheme adopted by the invention is as follows: a method for removing sulfur content in a hydroxide precursor comprises the following steps:
adding a mixed salt solution of nickel sulfate, cobalt sulfate and manganese sulfate, a sodium hydroxide solution and ammonia water into a reaction kettle in parallel as required to prepare precursor slurry;
raising the pH value of the slurry through a pH control system arranged in the reaction kettle, and controlling the temperature and the stirring speed for aging;
thirdly, after the aging is finished, transferring the slurry to a washing device, washing by adopting pure water, and controlling the washing temperature and the washing time;
fourthly, after washing is finished, filtering the slurry to obtain a filter cake;
fifthly, drying, sieving, removing iron, packaging and the like are carried out on the filter cake in sequence to obtain the target product.
In the second step, the pH of the slurry is increased to 10.35-13.00, the temperature is controlled to be 50-90 ℃, and OH in the slurry is removed-The concentration is always 0.052-0.547 mol/L.
In the second step, the stirring speed is controlled to be 50-500 rpm.
In the second step, the aging time is 1-5 h.
In the third step, the washing device is one of a centrifuge, a filter press and a filtering and washing integrated machine.
In the fifth step, the sulfur content in the precursor product is less than or equal to 1500 ppm.
The invention has the beneficial effects that: a method for removing sulfur content in hydroxide precursor solves the problem that the sulfur content in the hydroxide precursor prepared by coprecipitation is high at present, directly raises the pH value of the slurry by changing the aging condition of the slurry so as to achieve the purpose of controlling the content of S impurities in the product and replace the existing alkaline washing method; the content of S impurities can be effectively controlled by simply controlling the aging condition of the slurry, so that the alkali consumption and the water consumption in the washing process are greatly reduced, the amount of wastewater is reduced, the washing steps are simplified, and the effects of reducing the cost, improving the production efficiency and reducing the wastewater discharge are achieved. In addition, the traditional washing method can not finish the alkali washing of all materials at one time, generally needs to be divided into a plurality of batches of washing, slurry is gradually oxidized in the process of waiting for washing, S impurities are easily adsorbed in particles, and the S impurity content of a rear-section product is caused to rise. The invention has the advantages of high efficiency and low cost. The method can be widely applied to the washing process of the precursor, and is particularly suitable for the process of washing and desulfurizing the hydroxide precursor.
Detailed Description
The following examples are presented to enable those skilled in the art to more fully understand the present invention and are not intended to limit the invention in any way.
Example 1
A method for removing sulfur content in hydroxide precursors is characterized by comprising the following steps:
adding a mixed salt solution of nickel sulfate, cobalt sulfate and manganese sulfate, a sodium hydroxide solution and ammonia water into a reaction kettle in parallel as required to prepare precursor slurry;
② the pH value of the slurry is increased to 10.38 by a pH control system arranged in the reaction kettle, the temperature is controlled to be 90 ℃, and OH in the slurry-The concentration is always 0.052mol/L, the stirring speed is controlled to be 100rpm, and aging is carried out for 1 h;
thirdly, after the aging is finished, transferring the slurry into a centrifugal machine or a filter press, washing by adopting pure water, and controlling the washing temperature to be 70 ℃ and the washing time to be 2 hours;
fourthly, after washing is finished, filtering the slurry to obtain a filter cake;
fifthly, the filter cake is sequentially subjected to the steps of drying, sieving, iron removal, packaging and the like, and the target product with the sulfur content of about 1105ppm can be obtained.
Example 2
A method for removing sulfur content in hydroxide precursors is characterized by comprising the following steps:
adding a mixed salt solution of nickel sulfate, cobalt sulfate and manganese sulfate, a sodium hydroxide solution and ammonia water into a reaction kettle in parallel as required to prepare precursor slurry;
② the pH value of the slurry is increased to 11.40 by a pH control system arranged in the reaction kettle, the temperature is controlled to be 70 ℃, and OH in the slurry-The concentration is always 0.105mol/L, the stirring speed is controlled to be 150rpm, and the aging is carried out for 2 h;
thirdly, after the aging is finished, transferring the slurry into a centrifuge or a washing and filtering integrated machine, washing by adopting pure water, and controlling the washing temperature to be 70 ℃ and the washing time to be 2 hours; (ii) a
Fourthly, after washing is finished, filtering the slurry to obtain a filter cake;
fifthly, the filter cake is sequentially subjected to the steps of drying, sieving, iron removal, packaging and the like, and the target product with the sulfur content of 1250ppm can be obtained.
Example 3
A method for removing sulfur content in hydroxide precursors is characterized by comprising the following steps:
adding a mixed salt solution of nickel sulfate, cobalt sulfate and manganese sulfate, a sodium hydroxide solution and ammonia water into a reaction kettle in parallel as required to prepare precursor slurry;
② the pH value of the slurry is increased to 12.82 by a pH control system arranged in the reaction kettle, the temperature is controlled to be 50 ℃, and OH in the slurry-The concentration is always 0.525mol/L, the stirring speed is controlled to be 200rpm, and the aging is carried out for 3 h;
thirdly, after the aging is finished, transferring the slurry into a filter press or a washing and filtering integrated machine, washing by adopting pure water, and controlling the washing temperature to be 70 ℃ and the washing time to be 2 hours; (ii) a
Fourthly, after washing is finished, filtering the slurry to obtain a filter cake;
fifthly, drying, sieving, removing iron, packaging and the like are carried out on the filter cake in sequence, thus obtaining the target product with the sulfur content of about 1430 ppm.
Comparative example
Adding a mixed salt solution of nickel sulfate, cobalt sulfate and manganese sulfate, a sodium hydroxide solution and ammonia water into a reaction kettle in parallel as required to prepare precursor slurry;
stopping feeding after the synthesis is finished, controlling technological parameters such as pH, temperature, stirring speed and the like of the slurry to be consistent with the synthesis process, and aging for 1 hour;
thirdly, after the aging is finished, putting the slurry into a centrifugal machine or a filter press or a washing and filtering integrated machine, and carrying out alkali washing and water washing after mother liquor is removed; the concentration of alkali liquor is 0.3mol/L, the temperature is 70 ℃, and the alkali washing time is 3 h; the washing temperature is 70 ℃, and the washing time is 2 h;
fourthly, after washing is finished, filtering the slurry to obtain a filter cake;
fifthly, the filter cake is sequentially subjected to the steps of drying, sieving, iron removal, packaging and the like, and the S content of the obtained product is about 1580 ppm.
The principle of the invention is as follows: research personnel find that the conventional washing method firstly dehydrates the slurry to obtain a filter cake, then carries out alkali washing and water washing on the filter cake, the particle surface is separated from the solution in the dehydration process, microscopic change is generated on the particle surface, so that the property of the wetting interface of the particle surface is changed, when the alkaline solution is leached or dispersedly washed again, the wetting property of the interface is reduced, the ion exchange is blocked, and the elution of sulfur impurities in the product is not facilitated, and related documents do not report the research in the aspect. The method utilizes the principle that hydroxide ions and sulfate ions adsorbed in the pores inside/on the surface of the particles are subjected to ion exchange, thereby achieving the purpose of reducing the content of sulfur impurities in the product; the pH value of the slurry is increased to 10.35-13.00, the temperature is controlled to be 50-90 ℃, and OH in the slurry-The concentration is always 0.052-0.547 mol/L, the reason is that the washing effect cannot be achieved due to too low pH, and the sodium ion index requirement can be achieved due to the fact that the water consumption is increased for water washing because of too high pH and more sodium ions are introduced; the washing effect is poor when the temperature is too low, and the washing effect is reduced because the interface of the precursor particles is easy to change when the temperature is too high. The method for washing can effectively keep the wetting interface between the particle surface and the solution, improve the ion exchange efficiency and achieve good washing effect.
The examples are compared with the comparative examples in the following table:
Claims (6)
1. a method for removing sulfur content in hydroxide precursors is characterized by comprising the following steps:
adding a mixed salt solution of nickel sulfate, cobalt sulfate and manganese sulfate, a sodium hydroxide solution and ammonia water into a reaction kettle in parallel as required to prepare precursor slurry;
raising the pH value of the slurry through a pH control system arranged in the reaction kettle, and controlling the temperature and the stirring speed for aging;
thirdly, after the aging is finished, transferring the slurry to a washing device, washing by adopting pure water, and controlling the washing temperature and the washing time;
fourthly, after washing is finished, filtering the slurry to obtain a filter cake;
fifthly, drying, sieving, removing iron, packaging and the like are carried out on the filter cake in sequence to obtain the target product.
2. The method for removing sulfur content in hydroxide precursor according to claim 1, wherein in step (II), the pH of the slurry is raised to 10.35-13.00, the temperature is controlled to 50-90 ℃, and OH in the slurry is-The concentration is always 0.052-0.547 mol/L.
3. The method for removing sulfur content in hydroxide precursor according to claim 1, wherein in step two, the stirring speed is controlled to be 50-500 rpm.
4. The method for removing sulfur content in hydroxide precursor according to claim 1, wherein in step (II), the aging time is 1-5 h.
5. The method for removing sulfur content in hydroxide precursor according to claim 1, wherein in the third step, the washing device is one of a centrifuge, a filter press and a washing and filtering integrated machine.
6. The method for removing sulfur content in hydroxide precursor according to claim 1, wherein in the fifth step, the sulfur content in the precursor product is less than or equal to 1500 ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010716123.0A CN111847529A (en) | 2020-07-23 | 2020-07-23 | Method for removing sulfur content in hydroxide precursor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010716123.0A CN111847529A (en) | 2020-07-23 | 2020-07-23 | Method for removing sulfur content in hydroxide precursor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111847529A true CN111847529A (en) | 2020-10-30 |
Family
ID=72949398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010716123.0A Pending CN111847529A (en) | 2020-07-23 | 2020-07-23 | Method for removing sulfur content in hydroxide precursor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111847529A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113440903A (en) * | 2021-05-21 | 2021-09-28 | 中冶瑞木新能源科技有限公司 | Method for aging ternary precursor |
| CN114784218A (en) * | 2022-03-29 | 2022-07-22 | 兰州金通储能动力新材料有限公司 | Method for reducing alkali content on surface of lithium battery cathode material |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280619A (en) * | 2011-07-08 | 2011-12-14 | 厦门钨业股份有限公司 | Preparation method of high-tap density spherical three-component anode material precursor |
| CN103332753A (en) * | 2013-06-06 | 2013-10-02 | 南通瑞翔新材料有限公司 | Preparation method of high-tap spherical high-manganese ternary anode material precursor |
| CN103342395A (en) * | 2013-07-04 | 2013-10-09 | 厦门钨业股份有限公司 | Method for preparing low-sulfur ternary precursor |
| CN106745331A (en) * | 2016-11-24 | 2017-05-31 | 华友新能源科技（衢州）有限公司 | A kind of preparation method of low-sulfur small particle nickel cobalt manganese hydroxide |
| CN107459069A (en) * | 2017-08-25 | 2017-12-12 | 浙江华友钴业股份有限公司 | A kind of method for reducing nickel cobalt aluminium presoma sulfur content |
| CN109279661A (en) * | 2018-09-13 | 2019-01-29 | 湖南鸿捷新材料有限公司 | A kind of preparation method reducing NCM ternary precursor sulfur content |
| CN110550668A (en) * | 2019-07-25 | 2019-12-10 | 浙江美都海创锂电科技有限公司 | Process preparation method of power type single crystal NCM622 type precursor concentrator |
| CN110817975A (en) * | 2019-09-19 | 2020-02-21 | 宜宾光原锂电材料有限公司 | Method for reducing sulfur content of ternary precursor |
-
2020
- 2020-07-23 CN CN202010716123.0A patent/CN111847529A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280619A (en) * | 2011-07-08 | 2011-12-14 | 厦门钨业股份有限公司 | Preparation method of high-tap density spherical three-component anode material precursor |
| CN103332753A (en) * | 2013-06-06 | 2013-10-02 | 南通瑞翔新材料有限公司 | Preparation method of high-tap spherical high-manganese ternary anode material precursor |
| CN103342395A (en) * | 2013-07-04 | 2013-10-09 | 厦门钨业股份有限公司 | Method for preparing low-sulfur ternary precursor |
| CN106745331A (en) * | 2016-11-24 | 2017-05-31 | 华友新能源科技（衢州）有限公司 | A kind of preparation method of low-sulfur small particle nickel cobalt manganese hydroxide |
| CN107459069A (en) * | 2017-08-25 | 2017-12-12 | 浙江华友钴业股份有限公司 | A kind of method for reducing nickel cobalt aluminium presoma sulfur content |
| CN109279661A (en) * | 2018-09-13 | 2019-01-29 | 湖南鸿捷新材料有限公司 | A kind of preparation method reducing NCM ternary precursor sulfur content |
| CN110550668A (en) * | 2019-07-25 | 2019-12-10 | 浙江美都海创锂电科技有限公司 | Process preparation method of power type single crystal NCM622 type precursor concentrator |
| CN110817975A (en) * | 2019-09-19 | 2020-02-21 | 宜宾光原锂电材料有限公司 | Method for reducing sulfur content of ternary precursor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113440903A (en) * | 2021-05-21 | 2021-09-28 | 中冶瑞木新能源科技有限公司 | Method for aging ternary precursor |
| CN114784218A (en) * | 2022-03-29 | 2022-07-22 | 兰州金通储能动力新材料有限公司 | Method for reducing alkali content on surface of lithium battery cathode material |
| CN114784218B (en) * | 2022-03-29 | 2023-11-07 | 兰州金通储能动力新材料有限公司 | Method for reducing alkali content on surface of positive electrode material of lithium battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107459069B (en) | A method of reducing nickel cobalt aluminium presoma sulfur content | |
| CN102583453B (en) | Industrial method for producing battery-grade lithium carbonate or high-purity lithium carbonate | |
| CN110600683B (en) | Preparation method of semi-continuous ternary precursor | |
| CN112551498A (en) | Method for recovering phosphorus iron slag after lithium extraction of lithium iron phosphate | |
| CN104445442B (en) | A kind of low chlorine/sulphur, large particle diameter cobalt hydroxide and preparation method thereof | |
| CN112357973A (en) | Preparation method of positive electrode material precursor and prepared positive electrode material precursor | |
| CN107324405A (en) | A kind of lithium nickel cobalt manganese oxide precursor and preparation method thereof and the lithium ion battery prepared by the presoma | |
| CN105271441A (en) | Preparation method of battery-grade large-grained cobaltosic oxide | |
| CN104229906B (en) | The method and apparatus of the nickel-containing waste water preparation plating level single nickel salt utilizing surface treatment process to produce | |
| CN112713269B (en) | Production system and production method for reducing content of sodium ions and sulfate ions in precursor of positive electrode material | |
| CN111847529A (en) | Method for removing sulfur content in hydroxide precursor | |
| CN108767218A (en) | A kind of post-processing approach that battery is prepared with nickel cobalt aluminium hydroxide | |
| CN103165878A (en) | Preparation method of spherical nickel-manganese binary material | |
| CN101830521B (en) | Method for producing cobalt carbonate | |
| CN113479861B (en) | Preparation method of low-sulfur-content nano iron phosphate | |
| CN114291850A (en) | Method for controlling morphology of ternary precursor in preparation process of ternary precursor | |
| CN103232065A (en) | Method for recycling before-kiln dehydration filtrate and method for producing titanium dioxide | |
| CN110980677A (en) | Method for preparing lithium iron phosphate precursor by using defective ferric phosphate | |
| CN110655115A (en) | Production process for continuously synthesizing high-activity spherical manganese oxyhydroxide by one-step method | |
| CN113735151A (en) | Low-iron boehmite and preparation method and application thereof | |
| CN108946825A (en) | A kind of preparation method of small grain size cobaltosic oxide | |
| CN102643710B (en) | Silicon wafer-cutting waste slurry recovery method | |
| CN116768176A (en) | Preparation method and application of ferric phosphate precursor | |
| CN101168453A (en) | Method for treating (SO4)2- impurity of spherical nickel hydroxide | |
| CN113845156A (en) | Preparation method of low-sodium-sulfur ultrahigh-nickel quaternary precursor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220303 Address after: 324000 No.1, building 9, No.18, Nianxin Road, Quzhou City, Zhejiang Province Applicant after: HUAYOU NEW ENERGY TECHNOLOGY (QUZHOU) Co.,Ltd. Applicant after: ZHEJIANG HUAYOU COBALT Co.,Ltd. Applicant after: Zhejiang Huayou Puxiang new energy materials Co.,Ltd. Address before: 324000 No.1, building 9, No.18, Nianxin Road, Quzhou City, Zhejiang Province Applicant before: HUAYOU NEW ENERGY TECHNOLOGY (QUZHOU) Co.,Ltd. Applicant before: ZHEJIANG HUAYOU COBALT Co.,Ltd. Applicant before: QUZHOU HUAHAI NEW ENERGY TECHNOLOGY Co.,Ltd. Applicant before: Zhejiang Huayou Puxiang new energy materials Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201030 |
|
| RJ01 | Rejection of invention patent application after publication |