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Lithium battery lithium titanate slurry and preparation method thereof

A technology of lithium titanate and lithium battery, which is applied in the field of preparation of lithium titanate slurry for lithium battery negative electrode, can solve the problems of agglomeration, coating with particles, difficulty in sieving, etc., and achieves improved consistency, easy coating, overcoming Difficulty dispersing effects

Active Publication Date: 2022-07-26
SHANDONG GOLDENCELL ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a preparation method of lithium titanate slurry for the negative electrode of lithium batteries. The technical problem to be solved is the agglomeration problem in the lithium titanate batching process, so as to solve the problems of difficulty in sieving and coating with particles, and provide lithium battery performance

Method used

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  • Lithium battery lithium titanate slurry and preparation method thereof
  • Lithium battery lithium titanate slurry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] ① Add 52g of binder and 1932g of lithium titanate into the dry powder mixer for 20-30min, stir and revolve for 15-25rpm, and obtain a well-mixed mixture 1;

[0024] ② Add mixture 1 into a stirring pot containing 1881g of solvent, carry out mixing and stirring for 150-180min, rotate the mixer at 20-35rpm, and stir and rotate at 2000-3000rpm to obtain uniform mixture 2;

[0025] ③ Add 390g of conductive agent into the mixture 2, carry out mixing and stirring for 40-60min, rotate the mixer at 20-35rpm, and stir and rotate at 2000-3000rpm to obtain a uniform mixture 3;

[0026] ④ Sand the mixture 3 with a sand mill equipped with 1.0-1.4mm zirconium beads, then add it to the mixer and stir, the stirring time is 30-40min, the mixer rotates at 20-35rpm, the vacuum degree is ≤-0.08mPa, and the solid content is prepared. 47% lithium titanate slurry with a viscosity of 6000-12000 mPa·s.

[0027] ⑤ Lithium battery production process: conventional processes such as sieving, coatin...

Embodiment 2

[0030] ① Add 54g of binder and 1928g of lithium titanate into the dry powder mixer for 20-30min, stir and revolve for 15-25rpm, to obtain a well-mixed mixture 1;

[0031] ② Add mixture 1 into a stirring pot containing 2087g of solvent, carry out mixing and stirring for 150-180min, rotate the mixer at 20-35rpm, and stir and rotate at 2000-3000rpm to obtain uniform mixture 2;

[0032] ③ Add 375g of conductive agent into the mixture 2, mix and stir for 40-60min, rotate the mixer at 20-35rpm, and stir and rotate at 2000-3000rpm to obtain a uniform mixture 3;

[0033] ④ Sand the mixture 3 with a sand mill equipped with 1.0-1.4mm zirconium beads, then add it to the mixer and stir, the stirring time is 30-40min, the mixer rotates at 20-35rpm, the vacuum degree is ≤-0.08mPa, and the solid content is prepared. 45% lithium titanate slurry with a viscosity of 6000-12000 mPa·s.

[0034] ⑤ Lithium battery production process: conventional processes such as sieving, coating, filming, windin...

Embodiment 3

[0037] ① Add 56g of binder and 1924g of lithium titanate into the dry powder mixer and mix for 20-30min, stir and revolve for 15-25rpm, to obtain a well-mixed mixture 1;

[0038] ② Add mixture 1 into a stirring pot containing 2181g of solvent, carry out mixing and stirring for 150-180min, rotate the mixer at 20-35rpm, and stir and rotate at 2000-3000rpm to obtain uniform mixture 2;

[0039] ③ Add 384g of conductive agent into the mixture 2, carry out mixing and stirring for 40-60min, the mixer rotates at 20-35rpm, and stirs and rotates at 2000-3000rpm to obtain a uniform mixture 3;

[0040] ④ Sand the mixture 3 with a sand mill equipped with 1.0-1.4mm zirconium beads, then add it to the mixer and stir, the stirring time is 30-40min, the mixer rotates at 20-35rpm, the vacuum degree is ≤-0.08mPa, and the solid content is prepared. 44% lithium titanate slurry with a viscosity of 6000-12000 mPa·s.

[0041] ⑤ Lithium battery production process: conventional processes such as sievi...

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Abstract

The invention relates to a lithium battery lithium titanate slurry and a preparation method thereof, belonging to the technical field of lithium batteries. The preparation method includes the following steps: (1) stirring lithium titanate and a binder to obtain a mixed powder; (2) adding the product of step (1) into a solvent in batches and stirring to obtain a mixture; (3) adding a conductive agent to the product of step (2) and mixing Stir to obtain a mixture; (4) Sand grinding the product of step (3) by a sanding process, and perform stirring and vacuum defoaming to obtain lithium battery lithium titanate slurry. Compared with the prior art, the preparation method of the lithium battery lithium titanate slurry of the present invention can overcome the difficulty of dispersing the lithium titanate in the batching process, effectively shorten the preparation time of the lithium titanate slurry, and improve the production efficiency.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and more particularly, the invention relates to a preparation method of a lithium titanate slurry for a negative electrode of a lithium battery. Background technique [0002] Since the industrialization of lithium batteries in 1991, the negative electrode material of the battery has always been a graphite material. Lithium titanate materials have attracted much attention as anode materials for new lithium batteries due to their excellent properties. Lithium titanate batteries have the characteristics of small size, high energy density, no memory effect, high charge-discharge rate, long cycle life, and wide operating temperature range. They are widely used in the field of communication voltage, aerospace, and power vehicles. prospect. [0003] The aggregated crystal structure of lithium titanate materials can maintain a high degree of stability during the inlay and de-insertion process of li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M4/58H01M10/0525
CPCH01M4/485H01M4/5825H01M10/0525Y02E60/10
Inventor 贾传龙王勇张敬捧薛娟娟
Owner SHANDONG GOLDENCELL ELECTRONICS TECH
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