Preparation method of large-particle-size aluminum-doped cobalt trioxide

A technology of tricobalt tetroxide and large particle size, which is applied in the direction of cobalt oxide/cobalt hydroxide, electrical components, battery electrodes, etc., which can solve the problems of low recovery rate of cobalt metal, non-continuous production, and low work efficiency, and achieve high sphericity, The effect of improving production efficiency and reducing production cost

Active Publication Date: 2018-10-12
JINGMEN GEM NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No matter the method is to prepare seed crystals or to produce finished products after separation, the clarification process is adopted, which cannot be continuously produced, and the

Method used

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  • Preparation method of large-particle-size aluminum-doped cobalt trioxide
  • Preparation method of large-particle-size aluminum-doped cobalt trioxide
  • Preparation method of large-particle-size aluminum-doped cobalt trioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Preparation of almost spherical aluminum-doped cobalt carbonate seed crystals

[0039] 1.1 Preparation of aluminum salt solution

[0040] at 3m 3 Add 2m to the aluminum salt preparation tank 3 The pure water is heated through the built-in steam coil, the temperature is heated to 80-85°C, the stirring speed is turned on, and the motor speed is controlled to 400r / min. Add a certain amount of aluminum sulfate hexadecahydrate solid into the hot water in the preparation tank, stir for about 1 hour to dissolve it, turn off the stirring, let it stand for 30 minutes, and take a sample to detect that the concentration of aluminum ions is 8.0-8.5g / L.

[0041] 1.2 Preparation of Al-Co solution

[0042] Accurately add 10m 3 Cobalt chloride solution with a concentration of 145-150g / L, and then accurately add the prepared aluminum salt to 1.14m through a mass flow meter 3 Aluminum salt solution, turn on the stirring of the aluminum-cobalt preparation tank, control the stirrin...

Embodiment 2

[0058] 1. Preparation of almost spherical aluminum-doped cobalt carbonate seed crystals

[0059] 1.1 Preparation of aluminum salt solution

[0060] at 3m 3 Add 2m to the aluminum salt preparation tank 3 The pure water is heated through the built-in steam coil, the temperature is heated to 80-85°C, the stirring speed is turned on, and the motor speed is controlled to 400r / min. Add a certain amount of aluminum sulfate hexadecahydrate solid into the hot water in the preparation tank, stir for about 1 hour to dissolve it, turn off the stirring, let it stand for 30 minutes, and take a sample to detect that the concentration of aluminum ions is 8.0-8.5g / L.

[0061] 1.2 Preparation of Al-Co solution

[0062] Accurately add 10m 3 Cobalt chloride solution with a concentration of 145-150g / L, and then accurately add the prepared aluminum salt to 1.14m through a mass flow meter 3 Aluminum salt solution, turn on the stirring of the aluminum-cobalt preparation tank, control the stirrin...

Embodiment 3

[0078] 1. Preparation of almost spherical aluminum-doped cobalt carbonate seed crystals

[0079] 1.1 Preparation of aluminum salt solution

[0080] at 3m 3 Add 2m to the aluminum salt preparation tank 3 The pure water is heated through the built-in steam coil, the temperature is heated to 80-85°C, the stirring speed is turned on, and the motor speed is controlled to 400r / min. Add a certain amount of aluminum sulfate hexadecahydrate solid into the hot water in the preparation tank, stir for about 1 hour to dissolve it, turn off the stirring, let it stand for 30 minutes, and take a sample to detect that the concentration of aluminum ions is 8.0-8.5g / L.

[0081] 1.2 Preparation of Al-Co solution

[0082] Accurately add 10m 3 Cobalt chloride solution with a concentration of 145-150g / L, and then accurately add the prepared aluminum salt to 1.14m through a mass flow meter 3Aluminum salt solution, turn on the stirring of the aluminum-cobalt preparation tank, control the stirring...

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Abstract

The invention provides a preparation method of large-particle-size aluminum-doped cobalt trioxide, which adopts a continuous production method, and simultaneously removes supernatant containing no material while performing a neutralization precipitation reaction to obtain aluminum-contained cobalt carbonate seed crystal having a particle diameter D50 of 10 to 14.5 [mu]m; further, an aluminum cobalt solution and an ammonium hydrogen carbonate solution are added to the seed crystal for neutralization precipitation reaction until large particle diameter aluminum-doped cobalt carbonate having a particle diameter D50 of 18 to 21 [mu]m is obtained; the obtained aluminum-doped cobalt carbonate is subjected to iron removal, dehydration, washing and drying, and sectional thermal decomposition to obtain a black powdery aluminum-doped cobalt oxide product having a particle size D50 of 17.5-19 [mu]m. The cobalt trioxide doped aluminum obtained by the method of the invention is more uniform, the final product stably obtained by the stable reaction system is relatively stable, and the cobalt carbonate does not appear in the form of small particles or blocks; continuous production can be realized; and the production efficiency is higher.

Description

technical field [0001] The invention belongs to the technical field of new materials for lithium batteries, and in particular relates to a preparation method of aluminum-doped tricobalt tetroxide with a large particle size. Background technique [0002] With the continuous development of society, the speed of science and technology is accelerating, and the information society has arrived, which promotes the continuous updating of electronic products. Lithium battery products used in electronics are also emerging in an endless stream. Today, lithium battery products are still based on lithium cobalt oxide. The positive electrode material is the mainstream product. Lithium cobalt oxide is mainly sintered from tricobalt tetroxide and lithium carbonate or lithium hydroxide. Among them, tricobalt tetroxide is roasted from cobalt carbonate. Therefore, the most important factor determining the quality of lithium cobalt oxide is tricobalt tetroxide. Tap density, specific surface are...

Claims

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Application Information

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IPC IPC(8): H01M4/52H01M10/052C01G51/04
CPCC01G51/04H01M4/52H01M10/052Y02E60/10
Inventor 许开华刘文泽洪宏龙易全瑞涂晓峰
Owner JINGMEN GEM NEW MATERIAL
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