Lithium battery high-nickel ternary positive electrode slurry and preparation method thereof

A cathode slurry, lithium battery technology, applied in electrode manufacturing, battery electrodes, electrical components, etc., can solve problems such as water absorption and jelly, and achieve the effects of stable storage, shortened preparation time, and uniform dispersion

Inactive Publication Date: 2020-09-22
SHENZHEN GPC ENERGY GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the problems existing in the prior art, the object of the present invention is to provide a high-nickel ternary positive electrode slurry for lithium batteries and a preparation method thereof, aiming at solving the problem of water absor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1:

[0036] A lithium battery high nickel ternary positive electrode slurry, the positive electrode slurry is composed of a positive electrode active material, a conductive agent, a binder, an organic weak acid and an organic solvent, and the mass percentages are:

[0037] Positive electrode active material: 94%;

[0038] Conductive agent: 2.7%;

[0039] Adhesive: 3.0%;

[0040] Organic weak acid: 0.3%.

[0041] A preparation method of high nickel ternary positive electrode slurry for lithium battery includes the following steps:

[0042] S1: Add 94% of the positive electrode active material, 2.7% of the conductive agent and 3.0% of the binder to the dual planetary mixer, turn on the cooling water circulation, and mix the materials at 500rpm / min rotation speed and 20rpm / min revolution speed for 30min ;

[0043] S2: Add 70wt% of organic solvent to S1 and continue to stir for 30 minutes to obtain crude slurry A;

[0044] S3: Add the remaining solvent to S2, continue to stir fo...

Example Embodiment

[0046] Example 2:

[0047] A lithium battery high nickel ternary positive electrode slurry, the positive electrode slurry is composed of a positive electrode active material, a conductive agent, a binder, an organic weak acid and an organic solvent, and the mass percentages are:

[0048] Positive electrode active material: 93.8%;

[0049] Conductive agent: 2.7%;

[0050] Adhesive: 3.0%;

[0051] Organic weak acid: 0.5%.

[0052] A preparation method of high nickel ternary positive electrode slurry for lithium battery includes the following steps:

[0053] S1: Add 93.8% of the positive electrode active material, 2.7% of the conductive agent and 3.0% of the binder to the double planetary mixer, turn on the cooling water circulation, and mix the materials at a rotation speed of 500rpm / min and a revolution speed of 20rpm / min for 30min ;

[0054] S2: Add 70wt% of organic solvent to S1 and continue to stir for 30 minutes to obtain crude slurry A;

[0055] S3: Add the remaining solvent to S2, con...

Example Embodiment

[0057] Example 3:

[0058] A lithium battery high nickel ternary positive electrode slurry, the positive electrode slurry is composed of a positive electrode active material, a conductive agent, a binder, an organic weak acid and an organic solvent, and the mass percentages are:

[0059] Positive electrode active material: 94%;

[0060] Conductive agent: 2.7%;

[0061] Adhesive: 3.2%;

[0062] Organic weak acid: 0.1%.

[0063] A preparation method of high nickel ternary positive electrode slurry for lithium battery includes the following steps:

[0064] S1: Add 94% of the positive electrode active material, 2.7% of the conductive agent and 3.2% of the binder to the double planetary mixer, turn on the cooling water circulation, and mix the materials at a rotation speed of 500rpm / min and a revolution speed of 20rpm / min for 30min ;

[0065] S2: Add 70wt% of organic solvent to S1 and continue to stir for 30 minutes to obtain crude slurry A;

[0066] S3: Add the remaining solvent to S2, continu...

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Abstract

The invention discloses a lithium battery high-nickel ternary positive electrode slurry and a preparation method thereof. The positive electrode slurry is composed of a positive electrode active material, a conductive agent, an adhesive, an organic weak acid and an organic solvent. The preparation method comprises the following steps: S1, adding the positive electrode active material, the conductive agent and the adhesive into a stirrer, and uniformly performing mixing; S2, adding 50-70wt% of an organic solvent into S1, and performing stirring to obtain a coarse pulping material A; S3, addingthe residual solvent into S2, performing stirring, and performing stirring at a high speed to obtain a crude product B; S4, transferring the coarse slurry B prepared in the S3 into a ball mill, addingorganic weak acid, and carrying out ball milling to obtain ternary positive electrode slurry C. According to the preparation method, the problem that the high-nickel ternary material absorbs water toform jelly in the homogenizing process can be effectively solved, and the processability is improved; meanwhile, the preparation method can effectively shorten the preparation time of the slurry andimprove the production efficiency, and the prepared slurry is uniform in dispersion, stable in storage, beneficial to coating and easy to realize large-batch production.

Description

Technical field [0001] The invention belongs to the technical field of lithium ion batteries, and specifically relates to a lithium battery high nickel ternary positive electrode slurry and a preparation method thereof. Background technique [0002] With the promotion of energy saving and emission reduction, new energy vehicles are gradually becoming popular. To prepare new energy vehicles, power batteries are essential. Lithium-ion batteries have outstanding advantages such as high energy density, environmental friendliness, no memory effect, long cycle life, low self-discharge, and environmental protection. The materials used among them have also become the focus of research, especially positive electrode active materials. [0003] Currently, lithium battery cathode materials that have been commercially used include lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate, and nickel cobalt manganese ternary materials. Lithium cobaltate is currently the most matur...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M4/04H01M4/1391H01M10/0525
CPCH01M4/04H01M4/1391H01M4/362H01M4/505H01M4/525H01M4/62H01M4/623H01M4/625H01M10/0525Y02E60/10
Inventor 崔日俊刘小虹李露李国敏
Owner SHENZHEN GPC ENERGY GRP CO LTD
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