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Method for preparing ternary precursor and reaction device

A reaction device and precursor technology, applied in chemical instruments and methods, electrical components, nickel compounds, etc., can solve the problem of wide particle size distribution of ternary precursors, and achieve the effect of reducing agglomeration, increasing energy density, and high energy density

Active Publication Date: 2022-01-11
GUANGDONG JIANA ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method and reaction device for preparing a ternary precursor, aiming at solving the technical problem of wide particle size distribution of the existing ternary precursor

Method used

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  • Method for preparing ternary precursor and reaction device
  • Method for preparing ternary precursor and reaction device
  • Method for preparing ternary precursor and reaction device

Examples

Experimental program
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Effect test

preparation example Construction

[0060] The beneficial effects of the method and reaction device for preparing a ternary precursor provided by the present invention are: the molar concentration of the metal salt solution is 1mol / L-4mol / L, the molar concentration of the precipitating agent is 9mol / L-12mol / L, complexation The molar concentration of the agent is 6mol / L-9mol / L, and the batch method is used to repeat the co-precipitation reaction many times, effectively controlling the particle size and particle size distribution, and preparing a ternary precursor with a narrow particle size distribution, which solves the problem of existing ternary precursors. The technical problem of wide particle size distribution, the ternary precursor with narrow particle size distribution can effectively reduce the agglomeration of particles in the high-temperature lithium-mixed sintering section, effectively use the space between particles to increase the energy density of the material, and obtain a power battery positive ele...

Embodiment 2

[0078] Please refer to figure 2 , the present invention also provides a reaction device using any one of the methods for preparing a ternary precursor, including a reactor 100, a first container 200, a second container 300, a third container 400, a pure water pipeline 500 and The nitrogen tank 600, the reactor 100 is equipped with a heater for controlling the internal temperature of the reactor 100, the first container 200 is used to hold the metal salt solution, the second container 300 is used to hold the precipitant, and the third container 400 is used to hold the complexing agent. agent, the first container 200, the second container 300, the third container 400, the pure water pipeline 500 and the nitrogen tank 600 respectively supply the metal salt solution, the precipitating agent, the complexing agent, pure water and nitrogen to the reactor 100.

[0079] This reaction device applies any one of the preparation methods of Embodiment 1, the molar concentration of the meta...

Embodiment 3

[0113] In this example, a specific method in Example 1 is used to prepare a ternary precursor with a D50 of 10.5 μm and a narrow particle size distribution (Spanx co y mn (1-x-y) (OH) 2 , wherein x=0.8~0.9, y=0~0.2. The method comprises the steps of:

[0114] (1) configure metal salt solution, wherein Ni 2+ :Co 2+ :Mn 2+ =x:y:(1-x-y), wherein x=0.8~0.9, y=0~0.2;

[0115] (2) configuration molar concentration is the sodium hydroxide solution of 9mol / L-12mol / L;

[0116] (3) configuration molar concentration is the aqueous ammonia solution of 6mol / L-9mol / L;

[0117] (4) The first pipeline 220, the second pipeline 320 and the third pipeline 420 are respectively installed in the reaction kettle 100, and the outer ends are respectively connected with the first container 200 containing the metal salt solution, the second container 300 containing the sodium hydroxide solution and the ammonia containing solution. The third container 400 of the aqueous solution, and the flow is...

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Abstract

The invention relates to the technical field of lithium ion batteries, and provides a method for preparing a ternary precursor and a reaction device. The method comprises the following steps of: preparing a metal salt solution with the molar concentration of 1mol / L to 4mol / L; preparing a precipitator with the molar concentration of 9 mol / L to 12 mol / L; preparing a complexing agent with the molar concentration of 6 mol / L-9 mol / L; and intermittently carrying out coprecipitation reaction until the particle size D50 meets the requirement. The method for preparing a ternary precursor and the reaction device provided by the invention have the beneficial effects that a ternary precursor with narrow particle size distribution is prepared by adopting an intermittent method, the technical problem that the existing ternary precursor is wide in particle size distribution is solved, the ternary precursor with narrow particle size distribution can effectively reduce agglomeration of particles in a high-temperature lithium mixing sintering section, space among the particles is effectively utilized to improve the energy density of a material, and a power battery positive electrode material with high energy density is obtained.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a method and a reaction device for preparing a ternary precursor. Background technique [0002] The ternary material is a multi-element metal composite oxide represented by nickel-cobalt lithium manganese oxide and nickel-cobalt lithium aluminate. It can give full play to the advantages of the three metals, and the battery has a high energy density. It is one of the main positive electrode materials for power batteries and is widely used. Used in passenger cars and freight vehicles. [0003] The particle size distribution of ternary precursor is an important index affecting the performance of sintered products. However, the existing method for preparing ternary precursors produces precursors with a wide particle size distribution. Contents of the invention [0004] The purpose of the present invention is to provide a method and reaction device for preparing a te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/485H01M4/505H01M4/525H01M10/0525
CPCC01G53/006H01M4/505H01M4/525H01M4/485H01M10/0525H01M2004/028C01P2004/61C01P2004/01Y02E60/10
Inventor 罗敏高琦吴浩郑江峰
Owner GUANGDONG JIANA ENERGY TECH CO LTD
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