A kind of lithium battery material additive, lithium battery material and preparation method thereof

A technology of additives and lithium batteries, applied in battery electrodes, lithium batteries, non-aqueous electrolyte batteries, etc., can solve the problems of low additive content, poor material consistency, uneven additive mixing, etc., achieve the best material consistency and reduce residual alkali content , Improve the effect of electrical performance

Active Publication Date: 2022-07-08
宜宾锂宝新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the preparation method of additives for lithium battery materials is usually to directly add metal compounds for dry mixing preparation. When there are many kinds of metal compounds, it is easy to cause uneven mixing of additives. The content is too small, resulting in poor material consistency, and the later coating effect on lithium battery materials is not good

Method used

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  • A kind of lithium battery material additive, lithium battery material and preparation method thereof
  • A kind of lithium battery material additive, lithium battery material and preparation method thereof
  • A kind of lithium battery material additive, lithium battery material and preparation method thereof

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preparation example Construction

[0035] The present application proposes a method for preparing a lithium battery material additive, which includes the following steps: mixing a citric acid solution with an acetate solution containing a coating element, and then adjusting the pH to 6-10 with a pH adjuster.

[0036] Wherein, the coating elements include at least two of Sr, Zr, B, Al and Ti. That is, the coating element may contain any two of Sr, Zr, B, Al and Ti at the same time, and may also contain any three, four or five of Sr, Zr, B, Al and Ti at the same time.

[0037] The volume ratio of citric acid solution to acetate solution can be 1.5-2:1, such as 1.5:1, 1.6:1, 1.7:1, 1.8:1, 1.9:1 or 2:1, etc., or 1.5- Any other value in the 2:1 range.

[0038] If the citric acid solution is too small, the coating elements (except B) in the acetate solution cannot be effectively and uniformly complexed.

[0039] The concentration of citric acid solution can be 0.08-0.12mol / L, such as 0.08mol / L, 0.09mol / L, 0.1mol / L,...

Embodiment 1

[0078] The present embodiment provides a lithium battery material, and its preparation method is as follows:

[0079] The acetate solution containing the coating element was added dropwise to the citric acid solution at a rate of 1 mL / min, and then adjusted to 8 with a pH adjuster; then, the high nickel ternary material was added to the lithium battery material additive and continued stirring and mixing , followed by drying and sintering.

[0080] Among them, the cladding elements are composed of Sr, Zr, B, Al and Ti.

[0081] The volume ratio of the citric acid solution and the acetate solution is 2:1, the concentration of the citric acid solution is 0.1 mol / L, and the total concentration of the coating elements in the acetate solution is 0.01 mol / L. Specifically, the concentration of Sr in the acetate solution is 0.001mol / L, the concentration of Zr in the acetate solution is 0.001mol / L, the concentration of B in the acetate solution is 0.005mol / L, and the concentration of A...

Embodiment 2

[0086] The present embodiment provides a lithium battery material, and its preparation method is as follows:

[0087] The acetate solution containing the coating element was added dropwise to the citric acid solution at a rate of 0.5 mL / min, and then adjusted to 6 with a pH adjuster; then, the high-nickel ternary material was added to the lithium battery material additive and continued to stir Mixing, then drying, and sintering.

[0088] Among them, the cladding elements consist of Zr, Al and Ti.

[0089] The volume ratio of the citric acid solution and the acetate solution is 1.5:1, the concentration of the citric acid solution is 0.08mol / L, and the total concentration of the coating elements in the acetate solution is 0.008mol / L. The specific concentration of Zr in the acetate solution is 0.002mol / L, the concentration of Al in the acetate solution is 0.002mol / L, and the concentration of Ti in the acetate solution is 0.004mol / L.

[0090] The citric acid solution is obtained...

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Abstract

The invention discloses a lithium battery material additive, a lithium battery material and a preparation method thereof, belonging to the technical field of lithium batteries. The preparation method of the lithium battery material additive includes the following steps: mixing a citric acid solution with an acetate solution containing a coating element, and then adjusting the pH to 6-10 with a pH adjuster; the coating element includes Sr, Zr, B, Al and At least two of Ti; the volume ratio of the citric acid solution and the acetate solution is 1.5-2:1, the concentration of the citric acid solution is 0.08-0.12mol / L, and the concentration of the coating element in the acetate solution is 0.008 ‑0.012mol / L. By using the sol-gel method to prepare lithium battery material additives containing various coating elements, various coating elements can be uniformly mixed and have better material consistency. The surface is uniformly coated, and the surface residual alkali content of the high-nickel ternary material can also be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular, to a lithium battery material additive, a lithium battery material and a preparation method thereof. Background technique [0002] At present, the preparation method of additives for lithium battery materials is usually to directly add metal compounds for dry mixing preparation. When there are many kinds of metal compounds, it is easy to cause uneven mixing of additives, and the content of one additive on the surface of the material is too high, and the other additive is too much. The content is too small, resulting in poor material consistency and poor coating effect on lithium battery materials in the later stage. [0003] In view of this, the present invention is proposed. SUMMARY OF THE INVENTION [0004] One of the objectives of the present invention is to provide a preparation method of a lithium battery material additive to solve the above technical problems. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M4/505H01M4/525H01M10/052H01M6/14
CPCH01M4/628H01M4/505H01M4/525H01M10/052H01M6/14H01M2004/021Y02E60/10
Inventor 郝长旺张萍张彬范未峰程正侯世林李成王政强
Owner 宜宾锂宝新材料有限公司
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