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Method for preparing high-nickel ternary material under assistance of fluxing agent, obtained product and application

A high-nickel ternary material and flux technology, applied in chemical instruments and methods, nickel compounds, electrical components, etc., to achieve the effects of reducing production costs, good crystallinity, and uniform particle size distribution

Pending Publication Date: 2020-09-01
EVE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the above two patents do not involve the problem of flux modifying high-nickel ternary materials. Therefore, high-quality high-nickel ternary materials can be prepared and the production and raw material costs of high-nickel ternary materials can be reduced. The development of high nickel ternary materials is extremely important

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] A kind of Li(Ni 0.83 co 0.12 mn 0.05 ) 0.99 o 2 -(Mg 0.01 al 0.05 ) The preparation method of high nickel ternary material:

[0066] (1) Nickel sulfate, cobalt sulfate and manganese sulfate are mixed by stoichiometric ratio, the concentration that obtains metal salt is the mixed salt solution of 3mol / L, with described mixed salt solution, concentration be the sodium hydroxide solution of 3mol / L and The ammonia solution with a concentration of 10 wt% is mixed, and the volume ratio of the mixed salt solution, sodium hydroxide solution and ammonia solution is 2:4:1.5, filtered, washed, and dried to obtain a high-nickel ternary material precursor;

[0067] (2) The high-nickel ternary material precursor, lithium carbonate, the first flux (the molar ratio of magnesium fluoride and aluminum fluoride is = 1:2) and the second flux (aluminum nitrate) at a speed of 300r / min stirring and mixing for 10h, controlling the pH value of the solution during the mixing process to b...

Embodiment 2

[0070] A kind of Li(Ni 0.7 co 0.1 mn 0.2 ) 0.99 o 2 -(Al 0.05 Zr 0.05 ) The preparation method of high nickel ternary material:

[0071] (1) Nickel chloride, cobalt chloride and manganese chloride are mixed by stoichiometric ratio, the concentration that obtains metal salt is the mixed salt solution of 1mol / L, with described mixed salt solution, the concentration is the hydroxide of 2mol / L The sodium solution is mixed with an ammonia solution with a concentration of 5 wt%, and the volume ratio of the mixed salt solution, sodium hydroxide solution and ammonia solution is 3:6:3, filtered, washed, and dried to obtain a high-nickel ternary material precursor;

[0072](2) The high-nickel ternary material precursor, lithium carbonate, the first flux (the molar ratio of aluminum fluoride and lithium fluoride is 0.005:0.01) and the second flux (zirconium nitrate) at a speed of 100r / min stirring and mixing for 90 hours, the pH value of the solution during the mixing process was...

Embodiment 3

[0075] A kind of Li(Ni 0.65 co 0.07 mn 0.28 ) 0.99 o 2 -(Al 0.005 Mg 0.005 B 0.005 ) The preparation method of high nickel ternary material:

[0076] (1) Nickel nitrate, cobalt nitrate and manganese nitrate are mixed by stoichiometric ratio, the concentration that obtains metal salt is the mixed salt solution of 4mol / L, with described mixed salt solution, concentration be the sodium hydroxide solution of 6mol / L and The ammonia solution with a concentration of 20 wt% is mixed, and the volume ratio of the mixed salt solution, sodium hydroxide solution and ammonia solution is 1:2:0.2, filtered, washed, and dried to obtain a high-nickel ternary material precursor;

[0077] (2) The high-nickel ternary material precursor, lithium carbonate, the first flux (the molar ratio of aluminum fluoride, magnesium fluoride and boron oxide is 1:1:1) and the second flux (magnesium nitrate ) stirring and mixing at a speed of 600r / min for 15h, controlling the pH value of the solution durin...

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Abstract

The invention discloses a method for preparing a high-nickel ternary material with the assistance of a fluxing agent, an obtained product and application. The method comprises the following steps: (1)mixing a high-nickel ternary material precursor prepared by adopting a precipitation method, a lithium salt and a composite fluxing agent which comprises a first fluxing agent and a second fluxing agent to obtain a mixed material; and (2) calcining the mixed material to obtain the high-nickel ternary material. the high-nickel ternary material can be coated and doped at the same time through one-step calcination; the fluxing agent adopted by the invention has oxidability, so that the use of oxygen can be effectively reduced, and the production cost of the high-nickel ternary material is effectively reduced; by adopting the fluxing agent, the reaction temperature of the raw materials can be effectively reduced, and the problem that lithium carbonate with relatively high decomposition temperature cannot be applied to preparation of the high-nickel ternary material is solved.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery preparation, and in particular relates to a method for preparing a high-nickel ternary material assisted by a flux, the obtained product and its application. Background technique [0002] Nickel-cobalt-manganese ternary material, LiNi x co y mn z o 2 , due to its high energy density and high power density, it is widely used in the field of electric vehicles. However, in order to meet the market demand for long-range electric vehicles, ternary materials have gradually developed from low-nickel NCM111 to high-nickel NCM523 and NCM622. , NCM811. Although increasing the nickel content can increase the energy density of the ternary material, it also sacrifices the safety of the material and increases the difficulty of the preparation process. [0003] On the one hand, with the increase of nickel content, Ni in the material 2+ The content will increase accordingly, resulting in serious...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M4/485H01M4/505H01M4/525H01M10/0525
CPCC01G53/50H01M4/485H01M4/505H01M4/525H01M10/0525C01P2006/40H01M2004/028Y02E60/10
Inventor 王超曾汉民何巍刘金成
Owner EVE ENERGY CO LTD