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Positive electrode slurry and preparation method and application thereof

A positive electrode slurry and positive electrode material technology, which is applied in the direction of battery electrodes, electrical components, non-aqueous electrolyte storage batteries, etc., can solve the problems of long drying time of the pole pieces and the inability to fully exert the specific capacity of the lithium halide positive electrode slurry, etc., to achieve Low cost, ensure cycle stability, and reduce energy consumption

Pending Publication Date: 2022-03-08
南通赛得能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the energy consumption of the positive electrode slurry production and solvent recovery process that uses NMP as the solvent for preparing the slurry in the prior art, and the lithium halide positive electrode slurry that may be caused by using NMP as the solvent. The specific capacity of the material cannot be fully utilized, the drying time of the pole piece is long and other defects, thereby providing a positive electrode slurry and its preparation method and application

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  • Positive electrode slurry and preparation method and application thereof
  • Positive electrode slurry and preparation method and application thereof
  • Positive electrode slurry and preparation method and application thereof

Examples

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Embodiment 1

[0053] This embodiment provides a positive electrode slurry, the raw materials of which include 700g lithium iodide, 150g PVP K90, 150g Ketjen black dry powder and 2570g ethanol (the content of water in ethanol <200ppm);

[0054] The preparation method of above-mentioned positive electrode slurry comprises the following steps, in 700g lithium iodide, add 1220g ethanol, stir, lithium iodide is dissolved completely, obtain mixed solution A, standby; In 150g PVP K90, add 1350g ethanol, stir, make Dissolve it to obtain 10wt% mixed solution B; add mixed solution B to mixed solution A, stir to make it evenly mixed, then add 150g Ketjen Black dry powder, and ball mill for 2.5h to obtain positive electrode slurry, the solid content of positive electrode slurry was 28%.

[0055] This embodiment also provides a positive electrode sheet comprising the above-mentioned positive electrode slurry, and its preparation method includes the following steps,

[0056] The above positive electrode...

Embodiment 2

[0059] This embodiment provides a kind of positive electrode slurry, and its raw material comprises 750g lithium iodide, 150g PVP-VA 64K90, 100g Ketjen black dry powder and 2570g mixed alcohol solvent (the mass ratio of ethanol and isopropanol is 2:1, The content of water in ethanol <200ppm, the content of water in isopropanol <200ppm);

[0060] The preparation method of the above positive electrode slurry includes the following steps: add 1220g mixed alcohol solvent to 750g lithium iodide, stir to completely dissolve lithium iodide, and obtain mixed solution A for later use; add 1350g mixed solution A to 150g PVP-VA64 K90 Stir the alcohol solvent to dissolve it to obtain 10wt% mixed solution B; add the mixed solution B to the mixed solution A to make it evenly mixed, then add 100g Ketjen Black dry powder, and ball mill for 2.0h to obtain the positive electrode slurry, The solid content of the positive electrode slurry was 28%.

[0061] This embodiment also provides a positiv...

Embodiment 3

[0064] This embodiment provides a kind of positive electrode slurry, and its raw material comprises 650g lithium iodide, 150g PVB, 100g ketjen black dry powder, 100g SP (conductive carbon black) and 3000g ethanol (the content of the water in ethanol<200ppm);

[0065] The preparation method of above-mentioned positive electrode slurry comprises the following steps, in 650g lithium iodide, add 1650g ethanol, stir, lithium iodide is dissolved completely, obtain mixed solution A, standby; In 150g PVB, add 1350g ethanol, stir, make it Dissolve to obtain 10wt% mixed solution B; add mixed solution B to mixed solution A, stir to make it evenly mixed, then add 100g Ketjen black dry powder and 100g conductive carbon black, and ball mill for 3.0h to obtain positive electrode slurry, positive electrode slurry The solid content of the material is 25%.

[0066] This embodiment also provides a positive electrode sheet comprising the above-mentioned positive electrode slurry, and its preparat...

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Abstract

The invention belongs to the technical field of battery material preparation, and particularly relates to positive electrode slurry as well as a preparation method and application thereof. The positive electrode slurry comprises the following raw materials: a positive electrode material, an alcohol solvent and an alcohol-soluble binder, the water content in the alcohol solvent does not exceed 200ppm. According to the positive electrode slurry, the problem of high energy consumption in production and solvent recovery of the positive electrode slurry caused by taking NMP as a solvent and PVDF as a binder in the prior art is solved, the positive electrode slurry is good in stability and not prone to the problems of gelling, sedimentation and the like caused by external influence, the specific capacity of a positive electrode piece prepared from the positive electrode slurry can be exerted to the maximum extent, and the electrical performance is stable. In addition, the positive electrode slurry provided by the invention is low in cost, and raw materials are easy to obtain.

Description

technical field [0001] The invention belongs to the technical field of battery material preparation, and in particular relates to a positive electrode slurry and a preparation method and application thereof. Background technique [0002] As a commercial secondary battery, lithium-ion batteries have the advantages of high energy density, good cycle life, no memory effect, and environmental friendliness. They have been widely used in portable digital devices, new energy vehicles, and energy storage. At present, the positive electrode materials of lithium ion batteries mainly include lithium cobalt oxide, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminate, lithium manganese oxide, lithium iron phosphate and other materials. The ternary cathode material represented by nickel-cobalt lithium manganese oxide has the advantage of high energy density, but cobalt is relatively scarce as a strategic resource, and the cost is high. In addition, in the actual use proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/62H01M10/05
CPCH01M4/58H01M4/622H01M4/582H01M10/05Y02E60/10
Inventor 周行朱文俊菲利普·A·梅迪纳
Owner 南通赛得能源有限公司
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