Preparation method of magnesium-doped cobalt liquid and nickel-cobalt-manganese ternary precursor

A nickel-cobalt-manganese and precursor technology, applied in chemical instruments and methods, electrical components, nickel compounds, etc., can solve the problems of increasing production costs, increasing the types of ingredients, and achieving the effect of saving production costs

Active Publication Date: 2021-12-28
GUANGDONG JIANA ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of this application is to provide a preparation method of magnesium-doped cobalt liquid and magnesium-doped nickel-cobalt-manganese ternary precursor, aiming to so...

Method used

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  • Preparation method of magnesium-doped cobalt liquid and nickel-cobalt-manganese ternary precursor
  • Preparation method of magnesium-doped cobalt liquid and nickel-cobalt-manganese ternary precursor
  • Preparation method of magnesium-doped cobalt liquid and nickel-cobalt-manganese ternary precursor

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preparation example Construction

[0030] The first aspect of the embodiment of the present application provides a method for preparing a magnesium-doped cobalt liquid, the preparation method comprising:

[0031] S11: extracting the cobalt-containing aqueous phase after the P507 organic phase has been treated with the P204 organic phase to obtain the first P507 organic phase containing cobalt and magnesium;

[0032] S12: performing a first magnesium back-extraction treatment on the first P507 organic phase to obtain a second P507 organic phase containing cobalt and residual magnesium;

[0033] S13: performing the second magnesium back-extraction treatment and cobalt back-extraction treatment on the second P507 organic phase, respectively, to obtain a magnesium-doped cobalt liquid.

[0034] The preparation method of the magnesium-doped cobalt solution provided in the examples of the present application first uses the P507 organic phase to extract the cobalt-containing aqueous phase after the P204 organic phase t...

Embodiment 1

[0060] This embodiment provides a method for preparing a magnesium-doped cobalt solution and a magnesium-doped nickel-cobalt-manganese ternary precursor.

[0061] The preparation method of magnesium-doped cobalt liquid comprises the following steps:

[0062] S11 (saponification): Continuously add NaOH solution with a concentration of 11mol / L at a flow rate of 600-1200L / h and continuously add P507 extractant (2-ethylhexyl phosphate mono-2-ethylhexyl ester at a flow rate of 8000-15000L / h ) carry out saponification reaction, obtain the P507 organic phase after saponification, and its saponification rate is controlled at 40-60%;

[0063] S12 (extraction): at a flow rate of 2000-8000L / h, the cobalt-containing aqueous phase after the treatment of the P204 organic phase with a magnesium content of 5-20g / L and a cobalt content of 50-80g / L is added to the saponified P507 organic phase Carry out extraction treatment in, obtain the first P507 organic phase containing cobalt ...

Embodiment 2

[0070] This embodiment provides a method for preparing a magnesium-doped cobalt solution and a magnesium-doped nickel-cobalt-manganese ternary precursor.

[0071] The preparation method of magnesium-doped cobalt liquid comprises the following steps:

[0072] S11 (saponification): Continuously add NaOH solution with a concentration of 11mol / L at a flow rate of 600-1200L / h and continuously add P507 extractant (2-ethylhexyl phosphate mono-2-ethylhexyl ester at a flow rate of 8000-15000L / h ) carry out saponification reaction, obtain the P507 organic phase after saponification, and its saponification rate is controlled at 40-60%;

[0073] S12 (extraction): at a flow rate of 2000-8000L / h, the cobalt-containing aqueous phase after the treatment of the P204 organic phase with a magnesium content of 5-20g / L and a cobalt content of 50-80g / L is added to the saponified P507 organic phase Carry out extraction treatment in, obtain the first P507 organic phase containing cobalt ...

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Abstract

The invention relates to the technical field of electrode materials of lithium ion batteries, and provides a preparation method for magnesium-doped cobalt liquid. The preparation method comprises the following steps: carrying out extraction treatment on a cobalt-containing water phase treated by a P507 organic phase and a P204 organic phase to obtain a first P507 organic phase containing cobalt and magnesium, carrying out first reverse magnesium extraction treatment on the first P507 organic phase to remove most of impurity magnesium in the first P507 organic phase and to obtain a second P507 organic phase containing cobalt and the remaining part of magnesium, performing reverse magnesium extraction treatment on the remaining part of magnesium in the second P507 organic phase, and then performing reverse cobalt extraction treatment on the second P507 organic phase to obtain magnesium-doped cobalt liquid doped with different magnesium. The magnesium-doped cobalt liquid provided by the invention can be used as a raw material of a nickel-cobalt-manganese ternary precursor, and nickel-cobalt-manganese ternary precursors with different magnesium doping amounts can be prepared, so impurity magnesium in cobalt ore can be effectively utilized in a production process, and production cost is saved.

Description

technical field [0001] The application belongs to the technical field of lithium-ion battery electrode materials, and in particular relates to a preparation method of a magnesium-doped cobalt solution and a magnesium-doped nickel-cobalt-manganese ternary precursor. Background technique [0002] The nickel-cobalt-manganese ternary precursor has the advantages of high capacity, long life, and low price, and can be used as a front-end raw material for the preparation of lithium battery cathode materials. The performance index of the nickel-cobalt-manganese ternary precursor will affect the physical and chemical properties of the cathode material, and then It has an impact on the electrochemical performance of lithium batteries. [0003] Doping modification is a simple and effective means to improve the electrochemical performance of materials. Proper doping can improve the conductivity of materials, thereby increasing the migration rate of lithium ions in lithium batteries, and...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M4/505H01M4/525H01M4/62H01M10/0525
CPCC01G53/006H01M4/525H01M4/505H01M4/626H01M10/0525Y02E60/10Y02P10/20
Inventor 胡俊郑江峰高琦程焘
Owner GUANGDONG JIANA ENERGY TECH CO LTD
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