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Composite ternary material as well as preparation method and application thereof

A ternary material and mixture technology, applied in chemical instruments and methods, alumina/hydroxide preparation, nickel compounds, etc., can solve the problem of separate precipitation of doping elements, uneven doping of nickel-cobalt-manganese ternary materials, influence The electrochemical properties of materials can be improved to improve cycle stability, improve anti-overcharge and thermal stability, and prevent direct contact.

Active Publication Date: 2022-02-18
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 composite ternary material and its preparation method and application, aiming to solve the problem of uneven doping or doping of nickel-cobalt-manganese ternary materials The problem that elements are precipitated alone and affect the electrochemical performance of materials

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  • Composite ternary material as well as preparation method and application thereof
  • Composite ternary material as well as preparation method and application thereof
  • Composite ternary material as well as preparation method and application thereof

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preparation example Construction

[0039] The second aspect of the embodiment of the present application provides a method for preparing a composite ternary precursor, including:

[0040] S10: Provide nickel-cobalt-manganese ternary precursor;

[0041] S20: performing a first mixing treatment on the nickel-cobalt-manganese ternary precursor and the organic complexing agent to obtain an adsorption-type ternary precursor mixture;

[0042] S30: performing a second mixing treatment on the doped metal salt solution and the adsorption-type ternary precursor mixture to obtain a ternary precursor mixture adsorbed by the doped metal salt solution;

[0043] S40: drying the ternary precursor mixture adsorbed by the doped metal salt solution to obtain a ternary precursor adsorbed by the doped metal salt.

[0044] In the preparation method of the composite ternary precursor provided in the embodiment of the present application, the nickel-cobalt-manganese ternary precursor is first mixed with an organic complexing agent to...

Embodiment 1

[0065] This embodiment provides a method for preparing a composite ternary precursor and ternary material, including the following steps:

[0066] One, a kind of preparation method of composite ternary precursor, comprises the following steps:

[0067] S10: The preparation method of the nickel-cobalt-manganese ternary precursor includes: dissolving nickel salt, cobalt salt, and manganese salt in water respectively, and mixing them according to the molar ratio of 6:2:2 to obtain a nickel-cobalt-manganese mixed solution; Next, the nickel-cobalt-manganese mixed solution was co-precipitated with sodium hydroxide and ammonia water to obtain a nickel-cobalt-manganese ternary precursor.

[0068] S20: Mix the nickel-cobalt-manganese ternary precursor with 8-hydroxyquinoline, and keep stirring for 3 hours to generate an adsorption-type ternary precursor mixture.

[0069] S30: TiSO 4 The solution is gradually added to the adsorption-type ternary precursor mixture under stirring, ultra...

Embodiment 2

[0075] This embodiment provides a method for preparing a composite ternary precursor and ternary material, including the following steps:

[0076] One, a kind of preparation method of composite ternary precursor, comprises the following steps:

[0077] S10: The preparation method of the nickel-cobalt-manganese ternary precursor includes: dissolving nickel salt, cobalt salt, and manganese salt in water respectively, and mixing them according to the molar ratio of 6:2:2 to obtain a nickel-cobalt-manganese mixed solution; Next, the nickel-cobalt-manganese mixed solution was co-precipitated with sodium hydroxide and ammonia water to obtain a nickel-cobalt-manganese ternary precursor.

[0078] S20: Mix the nickel-cobalt-manganese ternary precursor with 8-hydroxyquinoline, and keep stirring for 3 hours to generate an adsorption-type ternary precursor mixture.

[0079] S30: MgSO 4 The solution is gradually added to the adsorption-type ternary precursor mixture under stirring, ultra...

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Abstract

The invention relates to the technical field of lithium battery electrode materials, and provides a composite ternary material which has a core-shell structure and comprises a ternary precursor material and a doped metal salt layer coating the surface of the ternary precursor material. The composite ternary precursor provided by the invention contains the doped metal salt layer coated on the surface of the ternary precursor material, after the composite ternary precursor and a lithium source are sintered, a ternary material with uniformly distributed doped metal elements and coated with the metal oxide layer can be formed, the metal doping can effectively inhibit the conversion of the crystal structure of the surface layer of the material in the circulation process, and the coating of the metal oxide layer can avoid the direct contact with electrolyte and inhibit the side reaction, so that the circulation stability of the material can be improved.

Description

technical field [0001] The application belongs to the technical field of lithium battery electrode materials, and in particular relates to a composite ternary material and its preparation method and application. Background technique [0002] With the rapid growth of new energy vehicles, the demand for power batteries is also increasing, and the performance of ternary cathode materials directly determines the performance of batteries. High-nickel materials and nickel-based cobalt-free materials are popular due to their advantages of high energy density and low cost. [0003] However, during the charging and discharging process, due to the poor thermal stability and safety problems of the mixed arrangement of nickel elements, although a small amount of doping with Al, Mg, Ti and other elements can improve the safety performance of the material to a certain extent, but doping The heterogeneous elements are unevenly distributed inside the ternary material, which affects the ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00C01G23/00C01F7/74C01F7/32C01F5/40C01F5/12H01M10/052
CPCC01G53/006C01G23/008C01F5/40C01F7/74C01G53/44C01F5/12C01F7/32H01M10/052C01P2006/40C01P2004/03C01P2002/72C01P2004/80Y02E60/10
Inventor 蔺健全郑江峰吴浩黄亚祥
Owner GUANGDONG JIANA ENERGY TECH CO LTD
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