Slurry compounding process of lithium ion battery slurry

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

Active Publication Date: 2013-05-22
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 mixing process of lithium ion battery slurry, in terms of mass percentage, has the following steps:

[0013] 1. Glue: 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 , and then add 73 grams of double-distilled water, and continue to stir for 12 hours under the condition of -0.1Mpa in vacuum, and finally obtain 100% glue, which has a mass of 123.5 grams of conductive glue;

[0014] 2. Configure conductive adhesive: Add 1.5 grams of SP conductive agent to the 100% adhesive configured above, and then stir for 5 hours under the conditions of revolution at 30 rpm and rotation at 5000 rpm, and a uniformly dispersed conductive adhesive is obtained. Glue;

[0015] 3. Slurry configuration: Take the conductive adhesive with a mass of 37 grams in step 1, and add 93 grams of graphite powder, and then use a v...

Embodiment 2

[0017] A slurry mixing process for lithium-ion battery slurry, comprising the following steps:

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

[0019] 2. Configure conductive glue: add 100 grams of CMC glue prepared above, 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 at 50 rpm and autobiography at 7000 rpm , and a conductive adhesive with a concentration of 0.5% was obtained;

[0020] 3. Slurry configuration: Take 40 grams of conductive adhesive in step 2, and add 95 grams of graphite powder, then vacuum at -0.09Mpa, public transmission speed is 50 rpm, and a...

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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 slurry mixing process, in particular to a preparation method of the lithium ion battery slurry mixing slurry process. Background technique [0002] At present, there are many factors that restrict the consistency of lithium-ion batteries: for example: slurry mixing, coating, raw materials and battery cell preparation, and slurry mixing is a key factor affecting the consistency of its batteries. The known negative electrode material slurry is mainly mixed by stirring the binder and the 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. agent, and then add the active material in batches, and stir for a certain period of time to obtain the negative electrode slurry. In the above slurry mixing method, there is uneven dispersion of the conductive agent in the early stage or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M4/62
CPCY02E60/12Y02E60/10
Inventor 丁建民
Owner JIANGSU LENENG BATTERY INC
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