CN112408500A - Production method of battery-grade cobalt oxide - Google Patents
Production method of battery-grade cobalt oxide Download PDFInfo
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- CN112408500A CN112408500A CN202011350298.0A CN202011350298A CN112408500A CN 112408500 A CN112408500 A CN 112408500A CN 202011350298 A CN202011350298 A CN 202011350298A CN 112408500 A CN112408500 A CN 112408500A
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Abstract
The invention discloses a production method of battery-grade cobalt oxide, which comprises the following steps: respectively premixing cobalt liquid and alkali liquor with air, and introducing the premixed cobalt liquid and alkali liquor into a reaction kettle to perform synthetic reaction; and washing, primary drying, high-temperature sintering, slurrying and washing and secondary drying are carried out on the obtained slurry to obtain a finished product of the material. And (3) adopting a premixing device and process, organically combining secondary washing and high-temperature sintering, removing contained impurities, and finally sintering to remove water to obtain the cobalt oxide product with high specific surface and low sodium.
Description
Technical Field
The invention relates to the field of lithium ion batteries, in particular to a production method of battery-grade cobalt oxide.
Background
The present cobalt oxide synthesis process adopts cobalt, alkali and air as raw materials, and then adopts a trisection method, and the synthesized material is analyzed by XRD, so that the CoHO can be synthesized in the reaction kettle2、HCoO2、Co3O4、CoCo2O4These single crystal particle assemblies.
Different structures differ in their properties, pure CoHO2、HCoO2The cobalt content of the single crystal grain constituent particles is 64.10Percent; pure Co3O4、CoCo2O4The single crystal particles constituted 73.42% cobalt content of the particles. The product synthesized by the trisection method is CoHO2、HCoO2、Co3O4、CoCo2O4Water (free water, combined water), sodium salt and the like, and the cobalt content is between 69.50 and 70.5 percent. The proportion and the content of the single crystal particles in the material are almost fixed.
CoHO in synthesis2、HCoO2The composition has high material occupation ratio, because the single crystal particles are small, the unit cell is relatively small, the particle pores are more, more sodium is coated, the cobalt content of the material is low, but the particle activity and the specific surface area are high, if Co is synthesized3O4，CoCo2O4The material has high material occupation ratio, unit cell particles formed by the materials are relatively large, the particle pores are reduced, the coated sodium is reduced, and the specific surface is reduced.
As described above, in order to increase the specific surface area, the HCoO in the synthesis should be increased2Compared with the prior art, the feeding mode of synthesizing cobalt oxide by a wet method, namely a cobalt-alkali air trisection method, cannot improve the synthesis of HCoO due to insufficient oxidation strength2Phase ratio, resulting in a small specific surface.
If HCoO is contained in the material2The phase ratio is high, more sodium can be coated in the synthesis, and the traditional sintering process cannot effectively treat the sodium.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a production method of battery-grade cobalt oxide with low impurity phase, high specific surface area and high activity.
The invention is realized by the following technical scheme.
A method for producing battery grade cobalt oxide, the method comprising:
(1) respectively premixing cobalt liquid and alkali liquor with air according to the flow ratio of 100-;
(2) and (2) washing the slurry obtained in the step (1), drying for the first time, sintering at high temperature, slurrying, washing, and drying for the second time to obtain a finished product of the material.
Further, the cobalt solution in the step (1) is 130g/L cobalt chloride solution, and the alkali solution is 32% sodium hydroxide solution.
Further, the synthesis reaction in the step (1) has the process conditions that the flow of the cobalt solution is 100-300L/h, and the flow ratio of the cobalt solution to the alkali liquor is 1: 0.4; controlling the pH value to be between 9 and 10, and controlling the stirring speed of the reaction kettle to be 150-320 rpm; the synthesis temperature is 66-72 ℃, and the residence time is 18-54 h.
Further, the ratio of the cobalt liquid flow rate to the stirring speed is 100L/h: 180rpm, 200L/h: 220rpm, 260L/h: 240rpm or 300L/h: 260 rpm.
Further, the premixing of step (1) is performed in a premixing device comprising: the air inlet pipes of the first ejector and the second ejector are connected with the air outlet pipe of the compressed air supply device, the feed pipe of the first ejector is connected with the cobalt liquid supply pipe, and the feed pipe of the second ejector is connected with the alkali liquid supply pipe; and the discharge pipes of the first ejector and the second ejector are respectively inserted into the reaction kettle from the upper end of the reaction kettle.
Further, a stirring impeller is arranged in the reaction kettle, the stirring impeller is located between the lower ends of the discharge pipes of the first ejector and the second ejector, the vertical distance between the lower end of the discharge pipe of the first ejector and the stirring impeller is 100mm, and the vertical distance between the lower end of the discharge pipe of the second ejector and the stirring impeller is 100 mm.
Further, the cobalt content in the slurry obtained in the step (1) is 64-68% by mass percent.
Further, the slurry obtained in the step (1) is washed in the step (2) until the sodium content is 0.05% -0.1%.
Further, the high-temperature sintering temperature in the step (2) is 600-700 ℃, the sintering speed is 15min per pot, and the sintering time is 5.3 h.
Further, the slurrying and washing in the step (2) is to obtain pure-phase Co obtained by high-temperature sintering3O4The mass ratio of the pure water to the pure water is 1: 5.
Further, the moisture of the finished product of the material obtained in the step (2) is 0.05-0.5% by mass percent, the finished product of the material is sintered at a low temperature, the low-temperature sintering temperature is 200-250 ℃, the sintering rate is 10min per pot, and the sintering time is 4h to obtain the finished product material with the moisture of less than 0.05%.
The invention has the beneficial technical effects that the invention provides a production method of battery-grade cobalt oxide with low impurity phase, high specific surface and high activity, a premixing device and a process are adopted, secondary washing and high-temperature sintering are organically combined, impurities are removed, and finally, sintering is carried out to remove water, so that a cobalt oxide product with high specific surface and low sodium is obtained. The cobalt alkali and the air are premixed through a premixing device, and the reaction distance is close enough to generate CoHO2、HCoO2And (3) reducing the external force and controlling the stirring speed of the material with high proportion to obtain the material with large enough specific surface and qualified loose degree.
Drawings
FIG. 1 is a process flow diagram of the present invention.
FIG. 2 is a schematic view of the construction of the premixing device of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a method for producing battery grade cobalt oxide comprises:
(1) cobalt solution and alkali solution are respectively mixed with air according to the flow ratio (the unit of cobalt solution and alkali solution is L/h, the unit of air is m)3H) mixing 100-300:4-30 in a premixing device and then introducing into a reaction kettle for synthetic reaction; wherein the flow rate of the cobalt solution is 100-300L/h, and the flow ratio of the cobalt solution to the alkali liquor is 1: 0.4; controlling the pH value to be between 9 and 10, and controlling the stirring speed of the reaction kettle to be 150-320 rpm; the synthesis temperature is 66-72 ℃, and the residence time is 18-54 h.
Because the particle size of the particles is adjusted and the oxidation strength and external force are controlled, the cobalt flow is increased in proportion to the stirring speed and the control amount of air, and is in direct proportion, for example, the ratio of the cobalt liquid flow to the stirring speed is 100L/h: 180rpm, 200L/h: 220rpm, 260L/h: 240rpm or 300L/h: 260 rpm.
The premixing is carried out in a premixing apparatus as shown in fig. 2, the premixing apparatus comprising: the device comprises a first ejector 1 and a second ejector 2, wherein an air inlet pipe 3 of the first ejector and an air inlet pipe 4 of the second ejector are both connected with an air outlet pipe of a compressed air supply device, a feed pipe 5 of the first ejector is connected with a cobalt liquid supply pipe, and a feed pipe 6 of the second ejector is connected with an alkali liquid supply pipe; a discharge pipe 7 of the first ejector and a discharge pipe 8 of the second ejector are respectively inserted into the reaction kettle from the upper end of a reaction kettle 9; a stirring impeller 10 is arranged in the reaction kettle 9, the stirring impeller 10 is driven by a motor arranged outside the reaction kettle, the stirring impeller 10 is positioned between the discharge pipe of the first ejector and the lower end of the discharge pipe 8 of the second ejector, the vertical distance between the lower end of the discharge pipe 7 of the first ejector and the stirring impeller 10 is 100mm, and the vertical distance between the lower end of the discharge pipe 8 of the second ejector and the stirring impeller 10 is 100 mm.
(2) The cobalt content of the slurry obtained in the step (1) is 64-68% by mass percent. (containing CoHO, measured by XRD)2、HCoO2Phase) is washed, dried for the first time, sintered at high temperature, pulped, washed and dried for the second time to obtain a finished material product, wherein the moisture in the finished material product is 0.05-0.5 percent by mass percent. Wherein, the slurry obtained in the step (1) is washed until the sodium content is 0.05-0.1%; the high-temperature sintering temperature is 600-700 ℃, the sintering speed is 15min per pot, the sintering time is 5.3h, the high-temperature sintering is to remove the bound water and convert the cobalt binders with various forms into pure Co3O4The slurrying and washing are to obtain pure-phase Co through high-temperature sintering3O4The mass ratio of the pure water to the pure water is 1: 5. At this time, the finished product with high moisture content can be packaged.
(3) And (3) sintering the material finished product obtained in the step (2) at a low temperature of 200-250 ℃, at a sintering rate of 10min per pot, for 4h to obtain a finished material with water content below 0.05%. At this point, the product can be packaged into a low-moisture finished product.
Example 1
Respectively premixing cobalt liquid and alkali liquor with air in a premixing device, and introducing into a reaction kettle for synthetic reaction; wherein the content of the first and second substances,the cobalt solution is 130g/L cobalt chloride solution, the alkali liquor is 32% sodium hydroxide solution, the cobalt solution flow is 300L/h, and the air is 24m3The pH is controlled at 9.9 +/-0.1, the alkali flow is about 120L/h, and the air is 10m3The stirring speed of the reaction vessel was 260 rpm. The synthesis temperature is controlled at 70-72 ℃ and the retention time is 18 h.
(2) And (2) washing the slurry obtained in the step (1), drying for the first time, sintering at high temperature, slurrying, washing, and drying for the second time to obtain a finished material product, wherein the water content is 0.08% by mass. Wherein the cobalt content of the slurry obtained in the step (1) is 68% by mass, and the slurry is washed until the sodium content is 0.05%; sintering at 610 + -10 deg.C for 5.3 hr at a sintering rate of 15min per pot, and pulping and washing pure-phase Co obtained by high-temperature sintering3O4The mass ratio of the pure water to the pure water is 1: 5.
(3) And (3) sintering the material finished product obtained in the step (2) at low temperature, and sintering at 210 +/-10 ℃ at a sintering rate of 10min for 4h per pot to obtain the finished material with the water content of below 0.05% and the sodium content of below 0.02%.
Example 2
Respectively premixing cobalt liquid and alkali liquor with air in a premixing device, and introducing into a reaction kettle for synthetic reaction; wherein the cobalt solution is 130g/L cobalt chloride solution, the alkali liquor is 32% sodium hydroxide solution, the cobalt solution flow is 260L/h, and the air is 21m3The pH is controlled to be 9.6 +/-0.1, the alkali flow is about 104L/h, and the air is 8m3The stirring speed of the reaction vessel was 240 rpm. The synthesis temperature is controlled at 69-71 ℃, and the retention time is 20 h.
(2) And (2) washing the slurry obtained in the step (1), drying for the first time, sintering at high temperature, slurrying, washing, and drying for the second time to obtain a finished material product, wherein the water content is 0.19% by mass. Wherein, the mass percentage of the cobalt content of the slurry obtained in the step (1) is 67.4 percent, and the slurry is washed until the sodium content is 0.056 percent; sintering at 630 +/-10 ℃ for 5.3h at a sintering rate of 15min per pot, and slurrying and washing pure-phase Co obtained by high-temperature sintering3O4The mass ratio of the pure water to the pure water is 1: 5.
(3) And (3) sintering the material finished product obtained in the step (2) at a low temperature of 220 +/-10 ℃, wherein the sintering rate is 10min per pot, and the sintering time is 4 hours, so that the finished material with the water content of less than 0.05% and the sodium content of less than 0.02 is obtained.
Example 3
Respectively premixing cobalt liquid and alkali liquor with air in a premixing device, and introducing into a reaction kettle for synthetic reaction; wherein the cobalt solution is 130g/L cobalt chloride solution, the alkali liquor is 32% sodium hydroxide solution, the cobalt solution flow is 200L/h, and the air is 16m3The pH was controlled to be 9.4. + -. 0.1, the alkali flow rate was about 80L/h, and the air flow rate was 7m3The stirring speed of the reaction vessel was 220 rpm. The synthesis temperature is controlled at 67-70 ℃ and the retention time is 27 h.
(2) And (2) washing the slurry obtained in the step (1), drying for the first time, sintering at high temperature, slurrying, washing, and drying for the second time to obtain a finished material product, wherein the water content is 0.36% by mass. Wherein, the mass percentage of the cobalt content of the slurry obtained in the step (1) is 66.5 percent, and the slurry is washed until the sodium content is 0.063 percent; sintering at 660 +/-10 ℃ for 5.3h at the sintering rate of 15min per pot, and slurrying and washing pure-phase Co obtained by high-temperature sintering3O4The mass ratio of the pure water to the pure water is 1: 5.
(3) And (3) sintering the material finished product obtained in the step (2) at low temperature, and sintering at 230 +/-10 ℃ at a sintering rate of 10min for 4 hours in each pot to obtain the finished material with the water content of below 0.05% and the sodium content of below 0.02%.
Example 4
Respectively premixing cobalt liquid and alkali liquor with air in a premixing device, and introducing into a reaction kettle for synthetic reaction; wherein the cobalt solution is 130g/L cobalt chloride solution, the alkali liquor is 32% sodium hydroxide solution, the cobalt solution flow is 100L/h, and the air is 8m3The pH is controlled to be 9.1 +/-0.1, the alkali flow is about 40L/h, and the air is 4m3The stirring speed of the reaction vessel was 180 rpm. The synthesis temperature is controlled at 66-68 ℃ and the retention time is 54 h.
(2) Washing the slurry obtained in the step (1) to obtainAnd (3) performing secondary drying, high-temperature sintering, slurrying and washing, and performing secondary drying to obtain a finished product of the material, wherein the water content is 0.48% by mass. Wherein the cobalt content of the slurry obtained in the step (1) is 64.5% by mass, and the slurry is washed until the sodium content is 0.07%; sintering at 690 +/-10 ℃ for 5.3h at a sintering rate of 15min per pot, and slurrying and washing pure-phase Co obtained by high-temperature sintering3O4The mass ratio of the pure water to the pure water is 1: 5.
(3) And (3) sintering the material finished product obtained in the step (2) at low temperature, and sintering at the temperature of 240 +/-10 ℃, wherein the sintering rate is 10min per pot, and the sintering time is 4h, so that the finished material with the water content of below 0.05% and the sodium content of below 0.02% is obtained.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. It should be noted that other equivalent modifications can be made by those skilled in the art in light of the teachings of the present invention, and all such modifications can be made as are within the scope of the present invention.
Claims (9)
1. A method for producing battery grade cobalt oxide, the method comprising:
(1) respectively premixing cobalt liquid and alkali liquor with air according to the flow ratio of 100-;
(2) and (2) washing the slurry obtained in the step (1), drying for the first time, sintering at high temperature, slurrying, washing, and drying for the second time to obtain a finished product of the material.
2. The production method according to claim 1, wherein the cobalt solution in the step (1) is 130g/L cobalt chloride solution, and the alkali solution is 32% sodium hydroxide solution.
3. The production method as claimed in claim 1, wherein the synthesis reaction in step (1) is carried out under the process conditions of cobalt liquid flow rate of 100L/h and flow rate ratio of cobalt liquid to alkali liquor of 1: 0.4; controlling the pH value to be between 9 and 10, and controlling the stirring speed of the reaction kettle to be 150-320 rpm; the synthesis temperature is 66-72 ℃, and the residence time is 18-54 h.
4. The production method according to claim 3, wherein the ratio of the cobalt liquid flow rate to the stirring speed is 100L/h: 180rpm, 200L/h: 220rpm, 260L/h: 240rpm or 300L/h: 260 rpm.
5. The production method according to claim 1 or 2, wherein the premixing of step (1) is performed in a premixing apparatus comprising: the air inlet pipes of the first ejector and the second ejector are connected with the air outlet pipe of the compressed air supply device, the feed pipe of the first ejector is connected with the cobalt liquid supply pipe, and the feed pipe of the second ejector is connected with the alkali liquid supply pipe; and the discharge pipes of the first ejector and the second ejector are respectively inserted into the reaction kettle from the upper end of the reaction kettle.
6. The production method according to claim 5, wherein a stirring impeller is arranged in the reaction kettle, the stirring impeller is positioned between the lower ends of the discharge pipes of the first ejector and the second ejector, the vertical distance between the lower end of the discharge pipe of the first ejector and the stirring impeller is 100mm, and the vertical distance between the lower end of the discharge pipe of the second ejector and the stirring impeller is 100 mm.
7. The production method according to claim 1 or 2, characterized in that the cobalt content in the slurry obtained through step (1) is 64 to 68% by mass.
8. The production method according to claim 1 or 2, wherein the step (2) comprises washing the slurry obtained in the step (1) to a sodium content of 0.05-0.1%; the high-temperature sintering temperature is 600-700 ℃, the sintering speed is 15min per pot, and the sintering time is 5.3 h; the slurrying and washing are to obtain pure-phase Co through high-temperature sintering3O4The mass ratio of the pure water to the pure water is 1: 5.
9. The production method according to claim 8, wherein the moisture content of the finished material obtained in the step (2) is 0.05-0.5% by mass, the finished material is sintered at a low temperature of 200-250 ℃ at a sintering rate of 10min per pot for 4 hours to obtain the finished material with the moisture content of below 0.05%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115636444A (en) * | 2022-11-18 | 2023-01-24 | 金川集团股份有限公司 | Preparation method of small-particle-size low-sodium-sulfur cobaltosic oxide for high-rate lithium cobaltate |
| WO2024017039A1 (en) * | 2022-07-22 | 2024-01-25 | 衢州华友钴新材料有限公司 | Cobaltosic oxide material and preparation method, positive electrode, and lithium battery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204057993U (en) * | 2014-08-06 | 2014-12-31 | 荆门市格林美新材料有限公司 | Improve battery-grade cobaltosic oxide oxidation kinetics air distributor and reaction unit |
| CN206424892U (en) * | 2016-12-13 | 2017-08-22 | 皖西学院 | gas-liquid stirring device |
| CN108862405A (en) * | 2017-05-15 | 2018-11-23 | 江苏凯力克钴业股份有限公司 | A kind of preparation method and device of low sodium cobaltosic oxide |
| CN110255629A (en) * | 2019-07-05 | 2019-09-20 | 衢州华友钴新材料有限公司 | A kind of preparation method of ultra-fine grain diameter cobaltosic oxide |
-
2020
- 2020-11-26 CN CN202011350298.0A patent/CN112408500A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204057993U (en) * | 2014-08-06 | 2014-12-31 | 荆门市格林美新材料有限公司 | Improve battery-grade cobaltosic oxide oxidation kinetics air distributor and reaction unit |
| CN206424892U (en) * | 2016-12-13 | 2017-08-22 | 皖西学院 | gas-liquid stirring device |
| CN108862405A (en) * | 2017-05-15 | 2018-11-23 | 江苏凯力克钴业股份有限公司 | A kind of preparation method and device of low sodium cobaltosic oxide |
| CN110255629A (en) * | 2019-07-05 | 2019-09-20 | 衢州华友钴新材料有限公司 | A kind of preparation method of ultra-fine grain diameter cobaltosic oxide |
Non-Patent Citations (1)
| Title |
|---|
| 夏勇 等: "高致密小粒径CoOOH液相合成条件的优化", 《电池》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024017039A1 (en) * | 2022-07-22 | 2024-01-25 | 衢州华友钴新材料有限公司 | Cobaltosic oxide material and preparation method, positive electrode, and lithium battery |
| CN115636444A (en) * | 2022-11-18 | 2023-01-24 | 金川集团股份有限公司 | Preparation method of small-particle-size low-sodium-sulfur cobaltosic oxide for high-rate lithium cobaltate |
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