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Nickel-cobalt-aluminum ternary gradient positive electrode material precursor as well as yield production method and application thereof

A positive electrode material and production method technology, applied in chemical instruments and methods, nickel compounds, inorganic chemistry, etc., can solve the problems that the concentration gradient precursor cannot be produced industrially, and achieve the effect of ensuring consistency and avoiding aggregation

Pending Publication Date: 2021-03-30
JINGMEN GEM NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, in view of the problem that the existing concentration gradient precursor cannot be produced industrially, the present invention provides a mass production method of the precursor of the nickel-cobalt-aluminum ternary gradient positive electrode material

Method used

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  • Nickel-cobalt-aluminum ternary gradient positive electrode material precursor as well as yield production method and application thereof
  • Nickel-cobalt-aluminum ternary gradient positive electrode material precursor as well as yield production method and application thereof
  • Nickel-cobalt-aluminum ternary gradient positive electrode material precursor as well as yield production method and application thereof

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Embodiment 1

[0030] This embodiment provides a mass production method of a nickel-cobalt-aluminum ternary gradient positive electrode material precursor, the method includes the following steps:

[0031] S1, with nickel sulfate, the ratio of cobalt ammonium sulfate metal molar ratio is 93.3:16.7 and is mixed with the mixed solution that total metal concentration is 2mol / L;

[0032] Dissolve aluminum sulfate octadecahydrate in pure water, and add 32% industrial liquid caustic soda to prepare a sodium metaaluminate solution with an aluminum content of 0.5mol / L, wherein the volume ratio of pure water to 32% industrial liquid caustic is 8:1;

[0033] 32% industrial liquid caustic soda is used as the precipitating agent solution; 17% ammonia water is used as the complexing agent solution;

[0034] S2, add pure water in the reactor, usually the addition of pure water is no more than half of the solvent in the reactor, in the present embodiment it is at 10m 3 Add 5m to the reaction kettle 3 pu...

Embodiment 2

[0043] This embodiment provides a mass production method of a nickel-cobalt-aluminum ternary gradient positive electrode material precursor, the method includes the following steps:

[0044] S1, with nickel sulfate, the ratio that cobalt ammonium sulfate metal molar ratio is 89.8:10.2 is mixed with the mixed solution that total metal concentration is 2mol / L;

[0045]Dissolve aluminum sulfate octadecahydrate in pure water, and add 32% industrial liquid caustic soda to prepare a sodium metaaluminate solution with an aluminum content of 0.3mol / L, wherein the volume ratio of pure water to 32% industrial liquid caustic is 10:1;

[0046] 32% industrial liquid caustic soda is used as the precipitating agent solution; 17% ammonia water is used as the complexing agent solution;

[0047] S2, add pure water in the reactor, usually the addition of pure water is no more than half of the solvent in the reactor, in the present embodiment, it is at 8m 3 Add 4m to the reactor 3 Pure water o...

Embodiment 3

[0055] This embodiment provides a mass production method of a nickel-cobalt-aluminum ternary gradient positive electrode material precursor, the method includes the following steps:

[0056] S1, with nickel sulfate, the ratio that cobalt ammonium sulfate metal molar ratio is 96:4 is mixed with the mixed solution that total metal concentration is 2mol / L;

[0057] Dissolve aluminum sulfate octadecahydrate in pure water, and add 32% industrial liquid caustic soda to prepare a sodium metaaluminate solution with an aluminum content of 0.1mol / L, wherein the volume ratio of pure water to 32% industrial liquid caustic is 12:1;

[0058] 32% industrial liquid caustic soda is used as the precipitating agent solution; 17% ammonia water is used as the complexing agent solution;

[0059] S2, add pure water in the reaction kettle, usually the addition of pure water is no more than half of the reaction kettle solvent, in the present embodiment is at 6m 3 Add 3m to the reactor 3 pure water ...

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Abstract

The invention belongs to the technical field of preparation of nickel-cobalt-aluminum ternary precursors, and discloses a nickel-cobalt-aluminum ternary gradient positive electrode material precursoras well as a yield production method and application thereof. The method comprises the following steps: S1, preparing a mixed solution containing nickel ions and cobalt ions, a sodium metaaluminate solution, a precipitant solution and a complexing agent solution for later use; S2, introducing protective gas into the reaction kettle containing a base solution, conducting stirring, and adding polymer microspheres; and S3, simultaneously injecting the mixed solution, the sodium metaaluminate solution, the precipitant solution and the complexing agent solution into the reaction kettle in the stepS2, carrying out coprecipitation reaction until the D50 of the obtained nickel-cobalt-aluminum ternary precursor semi-finished product reaches the target particle size, stopping feeding into the reaction kettle, and carrying out aftertreatment on the nickel-cobalt-aluminum ternary precursor semi-finished product to obtain the nickel-cobalt-aluminum ternary precursor . The preparation method disclosed by the invention is suitable for industrial production, and precursors of all batches are relatively stable.

Description

technical field [0001] The invention belongs to the technical field of preparation of nickel-cobalt-aluminum ternary precursors, and in particular relates to a nickel-cobalt-aluminum ternary gradient positive electrode material precursor and its mass production method and application. Background technique [0002] Driven by the pursuit of high energy density and low raw material costs, ternary cathode materials for lithium-ion batteries continue to develop towards high-nickel underestimation; under the same nickel content, nickel-cobalt-aluminum (NCA) materials have better thermal stability. However, the pursuit of energy density makes the nickel content of NCA materials higher and higher, and the corresponding thermal stability will also deteriorate accordingly. [0003] The core-shell structure material is a new type of material developed to solve the poor thermal stability of high-nickel NCA materials. However, due to the sudden change of excessive metal components at th...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M4/485H01M4/525
CPCC01G53/006H01M4/525H01M4/485C01P2004/03C01P2004/61Y02E60/10
Inventor 许开华蒋振康张坤李聪孙海波陈康黎俊范亮姣
Owner JINGMEN GEM NEW MATERIAL
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