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Ternary precursor material and preparation method thereof

A precursor and slurry technology, applied in chemical instruments and methods, electrical components, nickel compounds, etc., can solve the problems that ternary materials cannot meet the requirements of vehicle battery indicators, and it is difficult to control the internal structure

Active Publication Date: 2019-02-05
XTC NEW ENERGY MATERIALS(XIAMEN) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current production process of ternary precursor materials is difficult to control its internal structure
At present, the ternary materials prepared by conventional ternary precursor materials cannot meet the requirements of vehicle battery indicators

Method used

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  • Ternary precursor material and preparation method thereof
  • Ternary precursor material and preparation method thereof
  • Ternary precursor material and preparation method thereof

Examples

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Comparison scheme
Effect test

preparation example Construction

[0029] see figure 1 , is the flow chart of the preparation method of the ternary precursor material provided by the present invention. The preparation method of described ternary precursor material comprises the steps:

[0030] S1, weighing the nickel source, cobalt source and manganese source according to a predetermined ratio and dissolving them in deionized water to form a first mixed solution, and the molar concentration of nickel ions, cobalt ions and manganese ions in the first mixed solution is a predetermined ratio;

[0031] The nickel source, cobalt source and manganese source are all water-soluble salts. Specifically, the nickel source can be a mixture of one or more of nickel sulfate, nickel nitrate and nickel chloride, and the cobalt source can be one or more of cobalt sulfate, cobalt nitrate and cobalt chloride The manganese source can be one or a mixture of manganese sulfate, manganese nitrate and manganese chloride. The molar ratio of nickel ions, cobalt ion...

Embodiment 1

[0057] The nickel source, the cobalt source and the manganese source are weighed according to a predetermined ratio and dissolved in deionized water to form a first mixed solution. And the molar concentration ratio of nickel ions, cobalt ions and manganese ions in the first mixed solution is 5 / 2 / 3.

[0058] The first mixed solution is added to the first reactor, the first reactor is a reactor and the circulation flux is 25m 3 / h. Then add ammoniacal liquor and the first strong alkali solution wherein with constant rate, the concentration of described ammoniacal liquor gradually increases to 30g / L from 0g / L, the duration of adding described ammoniacal liquor is 12 hours; Described first strong alkali solution The ratio of the number of moles of hydroxide ions in the mixture to the number of moles of cations in the first mixed solution is 0.5, and the first strong alkali solution is sodium hydroxide solution.

[0059] The reaction temperature of the reaction environment in the...

Embodiment 2

[0065] The nickel source, the cobalt source and the manganese source are weighed according to a predetermined ratio and dissolved in deionized water to form a first mixed solution. And the molar concentration ratio of nickel ions, cobalt ions and manganese ions in the first mixed solution is 3 / 3 / 3.

[0066] The first mixed solution is added to the first reactor, the first reactor is a reactor and the circulation flux is 15m 3 / h. Then add ammoniacal liquor and the first strong alkali solution wherein with constant rate, the concentration of described ammoniacal liquor gradually increases to 15g / L from 0g / L, the duration of adding described ammoniacal liquor is 24 hours; Described first strong alkali solution The ratio of the number of moles of hydroxide ions in the solution to the number of moles of cations in the first mixed solution is 1, and the first strong alkali solution is a sodium hydroxide solution.

[0067] The reaction temperature of the reaction environment in th...

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Abstract

The invention provides a preparation method of ternary precursor material, comprising the following steps a: S1, weighing a nickel source, a cobalt source and a manganese source according to a predetermined ratio and dissolving in deionized water to form a first mixed solution; S2, adding the first mixed solution, a first strong alkali solution and a complexing agent to a first reactor; S3, addingseed crystal obtained by the reaction in S2 to a second reactor, and then adding a second complexing agent, a second mixing solution and a second alkali liquid solution to the second reactor for fullreaction; S4, transferring a reaction product obtained by the sufficient reaction in S3 is transferred to the aging tank to continue the reaction, transferring a precipitate into a filter press for solid-liquid separation, and washing the precipitate with the deionized water; S5, drying the precipitate obtained in S4 in an oxygen-rich atmosphere to obtain a ternary precursor material. At the sametime, the invention also provides the ternary precursor material.

Description

technical field [0001] The invention relates to a ternary precursor material for a lithium ion battery and a preparation method thereof. Background technique [0002] The ternary material is a layered nickel-cobalt-manganese composite cathode material, in which the main metal elements are nickel, manganese, and cobalt. Compared with lithium cobaltate, lithium nickelate, and lithium manganate, it has the advantages of low cost, large discharge capacity, good cycle performance, good thermal stability, and stable structure. Through the synergistic effect of Ni-Co-MN, the ternary material integrates the good cycle performance of lithium cobaltate, the high specific capacity of lithium nickelate, and the high safety and low cost of lithium manganate. The comprehensive performance is better than that of any single material. Combination compounds have become the most promising cathode materials for lithium-ion batteries. [0003] Ternary precursor materials are the key raw materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01M4/36H01M4/505H01M4/525H01M10/0525
CPCH01M4/366H01M4/505H01M4/525H01M10/0525C01G53/006H01M2004/028C01P2006/40C01P2006/11C01P2004/61C01P2004/01C01P2004/52C01P2004/84H01M4/1391H01M4/131Y02E60/10H01M10/052C01G53/04C01G53/40C01G53/50C01P2002/50C01P2004/32
Inventor 马跃飞郑隽
Owner XTC NEW ENERGY MATERIALS(XIAMEN) LTD
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