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A kind of conductive paste for lithium ion battery and preparation method thereof

A lithium-ion battery, conductive paste technology, applied in battery electrodes, cable/conductor manufacturing, secondary batteries, etc., can solve the problems that are not particularly common, the use effect of conductive agents is not particularly ideal, and achieve the effect of improving conductivity

Active Publication Date: 2017-10-27
山东利特纳米技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many domestic lithium e-commerce companies pay more attention to traditional production processes. A large part of lithium power plants are not particularly ideal for the use of some relatively high-end conductive agents, such as Ketjen black, carbon fiber, and carbon nanotubes. It is especially common, one is the price issue, the other is the consumption issue, and there is also the production process issue. The main difficulty lies in the dispersion

Method used

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  • A kind of conductive paste for lithium ion battery and preparation method thereof
  • A kind of conductive paste for lithium ion battery and preparation method thereof
  • A kind of conductive paste for lithium ion battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Graphene functionalization

[0023] (1) Add 0.2g graphene oxide to 200mL NMP, and ultrasonicate for 2h;

[0024] (2) Add 0.6 g of octadecylamine, react in an oil bath at 120° C. for 48 hours, cool, dilute, filter with suction, put it in a vacuum oven and dry at 50° C. to obtain functionalized graphene.

[0025] Preparation of conductive paste

[0026] (1) Weigh 2g of sodium dodecylsulfonate and dissolve it in the solvent N-methylpyrrolidone, then add 6g of functionalized graphene to make a mixed solution, ultrasonicate for 5 hours, and filter with suction to obtain a solid;

[0027] (2) Weigh 1.5g PVDF, add 90g solvent N-methylpyrrolidone, stir evenly, and make a mixed solution;

[0028] (3) Weigh 3 g of carbon black, add the carbon black and the solid obtained by suction filtration into the above mixed solution, and stir for 10 hours with a high-speed shear disperser to obtain the conductive paste 1.

Embodiment 2

[0030] (1) Weigh 1.5g PVDF, add 90g solvent N-methylpyrrolidone, stir evenly, and make a mixed solution;

[0031] (2) Weigh 6 g of graphene and 3 g of carbon black, add the above mixed solution, and stir for 10 hours using a high-speed shear disperser to obtain conductive paste 2.

[0032] Table 1 is the performance test data of the conductive paste.

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Abstract

The invention discloses conductive slurry for a lithium ion battery and a preparation method of the conductive slurry. The conductive slurry for the lithium ion battery comprises, by weight, 1-10% of functional graphene, 1-10% of carbon black, 0.1-5% of dispersing agents, 0.5-5% of binding agents and 90-99% of N-methyl pyrrolidone. According to the conductive slurry, conductive agents are highly pre-dispersed, the conductive slurry can be added when active materials of lithium ion battery electrodes are mixed, and conductivity of the lithium ion battery is improved.

Description

technical field [0001] The invention belongs to the technical field of battery slurry preparation, and in particular relates to a conductive slurry for lithium ion batteries and a preparation method thereof. Background technique [0002] As an important part of lithium-ion batteries, conductive agents greatly affect the performance of lithium-ion batteries. The function of the conductive agent in the positive electrode of the battery is mainly to improve the conductivity of the positive electrode. At present, many domestic lithium e-commerce companies pay more attention to traditional production processes. A large part of lithium power plants are not particularly ideal for the use of some relatively high-end conductive agents, such as Ketjen Black, carbon fiber, and carbon nanotubes. Especially common, one is the issue of price, the other is the issue of quantity, and the issue of production process. The main difficulty lies in the dispersion. Basically, conductive agents ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/24H01B13/00H01M4/583H01M10/0525
CPCH01B1/24H01B13/00H01M4/583H01M10/0525Y02E60/10
Inventor 苏阳宋肖肖苏启顺
Owner 山东利特纳米技术有限公司