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Production method of large-particle cobalt carbonate for high-voltage lithium cobaltate

A production method and technology for large particles, applied in cobalt carbonate and other directions, can solve problems such as poor morphology, poor stability, and wide particle size distribution

Inactive Publication Date: 2019-05-31
LANZHOU JINCHUAN NEW MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor stability, small particle size, wide particle size distribution and bad shape of the existing cobaltous hydroxide series cobalt tetroxide, the present invention provides a continuous synthesis method of large particle cobalt carbonate for lithium batteries

Method used

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  • Production method of large-particle cobalt carbonate for high-voltage lithium cobaltate
  • Production method of large-particle cobalt carbonate for high-voltage lithium cobaltate
  • Production method of large-particle cobalt carbonate for high-voltage lithium cobaltate

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Embodiment 1

[0025] A method for producing large-particle cobalt carbonate for high-voltage lithium cobalt oxide, the method comprising a nucleus growth process, a particle growth process, and an aging process, wherein the nucleus growth process is to nucleate reaction raw materials in a crystal nucleus generation kettle, The pH value is 8.5; the particle growth process includes a particle primary growth process and a particle optimization growth process. The particle primary growth process is carried out in the primary reactor, and the particle optimization growth process is carried out in the optimization reactor. The pH value of the growth process is within the scope of 8.0; the aging process is carried out in the aging kettle;

[0026] Specifically include the following steps:

[0027] (1) 60g / L of cobalt chloride metal liquid and 160g / L of ammonium bicarbonate solution were added to the ammonium bicarbonate solution containing 160g / L of ammonium bicarbonate through a metering pump at ...

Embodiment 2

[0033] A method for producing large-particle cobalt carbonate for high-voltage lithium cobalt oxide, the method comprising a nucleus growth process, a particle growth process, and an aging process, wherein the nucleus growth process is to nucleate reaction raw materials in a crystal nucleus generation kettle, The pH is 6.8; the particle growth process includes a particle primary growth process and a particle optimized growth process. The particle primary growth process is performed in the primary reactor, and the particle optimized growth process is performed in the optimized reactor. The pH value of operation is 6.8; Described ageing operation is carried out in ageing kettle;

[0034] Specifically include the following steps:

[0035] (1) 105g / L of cobalt chloride metal liquid and 200g / L of ammonium bicarbonate solution were added to the solution containing 240g / L of ammonium bicarbonate through a metering pump according to the flow rates of 450L / h and 550L / h, respectively. ...

Embodiment 3

[0041] A method for producing large-particle cobalt carbonate for high-voltage lithium cobalt oxide,

[0042] The method includes a nucleus growth process, a particle growth process, and an aging process. The nucleus growth process is to nucleate the reaction raw materials in a crystal nucleus generation kettle, and the pH value is 7; the particle growth process includes a particle primary growth process, a particle growth process, and a The optimized growth process, the particle primary growth process is performed in the primary reactor, the particle optimized growth process is performed in the optimized reactor, and the pH values ​​of the particle primary growth process and the particle optimized growth process are both controlled at 7; the aging process is in In the aging kettle;

[0043] Include the following steps:

[0044] (1) 150g / L of cobalt chloride metal liquid and 240g / L of ammonium bicarbonate solution were added to the solution containing 180g / L of ammonium bicar...

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Abstract

The invention relates to the technical field of lithium ion batteries and discloses a production method of large-particle cobalt carbonate for high-voltage lithium cobaltate. According to the method,continuous synthesis of large-particle cobalt carbonate is achieved through the steps of nuclear growth and particle growth; during the step of nuclear growth, reactions are carried out in a crystal nucleus generation kettle, and the nuclear growth is controlled in an online pH measurement mode, wherein the pH value during the nuclear growth is maintained at 6.8-8.5. During the step of particle growth, primary nuclear growth is carried out in a primary reaction still, growth optimization is carried out in an optimal reaction still, the particle size distribution and shape of particles are perfected, particle growth solutions containing nuclei formed in the step of nuclear growth are separately controlled in the online pH measurement mode, wherein the pH value of each solution is maintainedat 6.8-8.0. By means of the production method, the particle size distribution of generated large-particle cobalt carbonate is narrower and more uniform, and the particles with uniform shape and sizeare formed.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a method for producing large-particle cobalt carbonate for high-voltage lithium cobalt oxide. Background technique [0002] Lithium-ion batteries are favored because of their high voltage, high energy density, long cycle life, and low environmental pollution. In recent years, with the further growth of the demand for small portable power sources, it has created a good opportunity for the development of the lithium-ion battery industry. The rapid development of the lithium-ion battery industry has driven lithium cobalt oxide, nickel cobalt manganate lithium With the rapid development of cathode materials such as lithium, the demand for cathode materials for lithium-ion batteries has also increased significantly. Especially in recent years, with the rapid development of the digital product industry, people's demand for high-energy density lithium-ion batteries is inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/06
Inventor 智福鹏江名喜陈晓闯王娟辉吴来红刘世红马骞鲁相杰张振华颉颐何艳吴芳冯燕吴婧陈一生
Owner LANZHOU JINCHUAN NEW MATERIAL SCI & TECH
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