Production process and production device of wide-distribution cobaltosic oxide

A technology of cobalt tetroxide and production process, which is applied in the direction of cobalt oxide/cobalt hydroxide, etc., and can solve the problem that the particle size of the product is difficult to control

Pending Publication Date: 2021-05-28
JINGMEN GEM NEW MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, in order to solve the problem that the product particle size is difficult to control in the preparation of wide-distributed cobalt tetroxide by a completely continuous method, the present invention provides a production process for wide-distributed cobalt tetroxide

Method used

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  • Production process and production device of wide-distribution cobaltosic oxide
  • Production process and production device of wide-distribution cobaltosic oxide
  • Production process and production device of wide-distribution cobaltosic oxide

Examples

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Embodiment 1

[0040] Customers require broad-distribution cobalt tetroxide products to have the following properties: consistent primary crystal form, D00≥3.0μm, D50: 13~15μm, (D90-D50)=b>5.0μm, (D50-D10)=a>3.5μm;

[0041] In order to produce the tricobalt tetroxide product with above-mentioned properties, the specific production process that adopts is:

[0042]Step 1. Continuously add the cobalt chloride solution with a cobalt ion concentration of 0.4mol / L into the reactor at a rate of 550L / h, and add a 1mol / L precipitant while keeping the flow rate of the cobalt salt solution constant Solution (ammonium carbonate solution), the pH value of the flow control system by adjusting the ammonium carbonate solution is 7~8, then stirs with the speed of 150r / min, and at 50 ℃, until the particle diameter of the first cobalt salt precipitate obtained Until the first particle size value is reached, where the first particle size value satisfies D50≥8.0μm;

[0043] Step 2. Separating the first cobalt s...

Embodiment 2

[0052] Customers require broad-distribution cobalt tetroxide products to have the following properties: consistent primary crystal form, D00≥6.0μm, D50: 17~18μm, (D90-D50)=b>7.0μm, (D50-D10)=a>5.0μm;

[0053] In order to produce the tricobalt tetroxide product with above-mentioned properties, the specific production process that adopts is:

[0054] Step 1. Continuously add the cobalt sulfate solution with a cobalt ion concentration of 1.2mol / L into the reactor at a rate of 600L / h, and add a 2mol / L precipitant solution while keeping the flow rate of the cobalt salt solution constant (ammonium bicarbonate solution), the pH value of the flow control system by regulating the ammonium bicarbonate solution is 7~8, then stirs with the speed of 180r / min, and at 55 ℃, until the particle size of the first cobalt salt precipitate obtained until the particle size reaches the first particle size value, where the first particle size value satisfies D50≥13.0μm;

[0055] Step 2. Separating t...

Embodiment 3

[0064] Customers require broad-distribution cobalt tetroxide products to have the following properties: consistent primary crystal form, D00≥6.0μm, D50: 17~18μm, (D90-D50)=b>7.0μm, (D50-D10)=a>5.0μm;

[0065] In order to produce the tricobalt tetroxide product with above-mentioned properties, the specific production process that adopts is:

[0066] Step 1. Continuously add the cobalt nitrate solution with a cobalt ion concentration of 2.0mol / L into the reactor at a rate of 700L / h, and add a 3mol / L precipitant solution while keeping the flow rate of the cobalt salt solution constant (sodium carbonate solution), the pH value of the flow control system by regulating the sodium carbonate solution is 7~8, then stirs with the speed of 200r / min, and at 60 ℃, until the particle diameter of the first cobalt salt precipitate that obtains reaches Up to the first particle size value, where the first particle size value satisfies D50≥13.0μm;

[0067] Step 2. Separating the first cobalt sa...

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Abstract

The invention discloses a production process of wide-distribution cobaltosic oxide. The production process comprises the following steps: continuously adding a cobalt salt solution and a precipitator solution into a reaction device, and carrying out precipitation reaction in a stirring state until the particle size of a first cobalt salt precipitate obtained by the reaction reaches a first particle size value; separating the obtained first cobalt salt precipitate with the particle size reaching the first particle size value, and obtaining the cobalt salt precipitate with the first particle size for standby application; repeating the two steps to obtain at least one cobalt salt precipitate with a second particle size; mixing the obtained cobalt salt precipitate with the first particle size and the cobalt salt precipitate with the second particle size to obtain cobalt salt precipitate with wide particle size distribution; and sequentially carrying out centrifugal washing, drying and calcining on the obtained cobalt salt precipitate with wide particle size distribution to obtain the cobaltosic oxide with wide particle size distribution. According to the production process disclosed by the invention, the cobaltosic oxide with wide particle size distribution can be produced in batches, and the problems in the process of producing the cobaltosic oxide with wide particle size distribution by adopting a complete continuous method at present can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of battery material preparation, and in particular relates to a production process and a production device of wide-distributed tricobalt tetroxide. Background technique [0002] Lithium cobalt oxide is the main positive electrode material for 3C batteries. With the continuous improvement of living standards, people's requirements for specific energy of 3C batteries have also increased. For example, electronic products using 3C batteries are required to have longer standby time and higher Safety performance, so the preparation of large-capacity, high-power lithium-ion batteries is an inevitable trend in the development of 3C electronic products. [0003] To realize the high capacity of 3C lithium battery, there are two technical approaches that have been recognized by the industry: one is to use high-nickel ternary precursor material as the positive electrode material of 3C battery; the other is to prepare li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04
CPCC01G51/04C01P2004/03C01P2004/61
Inventor 许开华蒋振康吕志王登登刘坤陈永安
Owner JINGMEN GEM NEW MATERIAL
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