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Slurry compounding process of lithium ion battery slurry

A lithium-ion battery and slurry technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems affecting the consistency of slurry mixing and uneven dispersion of conductive agents, and achieve the effects of long storage time and simple preparation process.

Active Publication Date: 2015-07-15
JIANGSU LENENG BATTERY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above slurry mixing method has uneven dispersion of the conductive agent in the early stage or uneven dispersion of the conductive agent in the active material added later, which affects the consistency of the slurry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A slurry process for lithium ion battery slurry, in terms of mass percentage, has the following steps:

[0013] 1. Gluing: Take 1.5 grams of CMC (sodium hydroxymethyl cellulose) and add 49 grams of double distilled water, and then disperse and stir for 12 hours under the condition of a vacuum of -0.1Mpa and a dispersion speed of 20 rpm. , Then add 73 grams of double distilled water, and continue to stir for 12 hours under the vacuum degree of -0.1Mpa, and finally get 100% glue with a mass of 123.5 grams of conductive glue;

[0014] 2. Configure conductive adhesive: add 1.5 g of SP conductive agent to the above-configured 100% adhesive, then stir for 5 hours under the conditions of revolution of 30 revolutions / min and rotation of 5000 revolutions / min to obtain uniformly conductive Glue

[0015] 3. Slurry configuration: Take the conductive glue with a mass of 37 grams in step 1, and add 93 grams of graphite powder, and then the vacuum degree is -0.09Mpa, the revolution speed is...

Embodiment 2

[0017] A slurry process for lithium ion battery slurry consists of the following steps:

[0018] 1. Gluing: Take 1.0 g of CMC and add 61 g of double distilled water, disperse and stir for 4 hours under the condition of a vacuum of -0.09Mpa and a dispersion speed of 25 rpm, and then add 61 g of double distilled water , And continue to stir for 4 hours under the condition of a vacuum of -0.09Mpa, and finally obtain 100% glue and a CMC glue with a mass of 123 grams;

[0019] 2. Configure conductive adhesive: add the above-configured 100 grams of CMC adhesive, add 0.3 grams of SP conductive agent and 0.2 grams of CNT conductive agent, and then stir for 3 hours under the conditions of revolution of 50 revolutions / min and autobiography of 7000 revolutions / min. , And obtain a conductive adhesive with a concentration of 0.5%;

[0020] 3. Slurry configuration: Take 40 grams of conductive adhesive in step 2 and add 95 grams of graphite powder. Then, the vacuum is -0.09Mpa, the transmission sp...

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PUM

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Abstract

The invention relates to a slurry compounding process of a lithium ion battery slurry. In mass percent, the process comprises the following steps of: (1) beating an adhesive, (2) configuring a conductive adhesive, and (3) configuring the slurry. The lithium ion battery slurry prepared by adopting the process has the characteristics of uniformity, stability, long standing time and the like, and at the same time the preparation process is simple, flexible and especially suitable for large-scale lithium ion battery slurry compounding applications.

Description

Technical field [0001] The invention relates to a lithium ion slurrying process, in particular to a method for preparing a lithium ion battery slurry slurrying process. Background technique [0002] At present, there are many factors restricting the consistency of lithium-ion batteries: such as: mixing, coating, raw materials and cell preparation, and mixing is a key factor affecting the consistency of the battery. The known slurry of negative electrode material is mainly mixed by stirring the binder and conductive agent, and then the negative electrode material is added in batches, and finally the negative electrode slurry is prepared. For example, the Chinese Patent Specification CN201110060625.3 discloses that the binder and the conductive agent are added in sequence. Afterwards, the active material is added in batches and stirred for a certain period of time to obtain negative electrode slurry. The foregoing mixing method has the uneven dispersion of the conductive agent in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/583H01M4/62
CPCY02E60/10
Inventor 丁建民
Owner JIANGSU LENENG BATTERY INC