Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Cathode slurry of lithium ion batteries on production line and preparation method of cathode slurry

A lithium-ion battery, negative electrode slurry technology, applied in electrode manufacturing, battery electrodes, negative electrodes and other directions, can solve the problems of inappropriate viscosity, poor slurry dispersion, low production efficiency, etc., to achieve moderate viscosity, The effect of improving dispersion performance and improving production efficiency

Inactive Publication Date: 2017-11-24
GUANGDONG UNIV OF TECH
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium-ion battery negative electrode slurry on the existing production line generally has the disadvantages of poor slurry dispersion, particle precipitation, and unsuitable viscosity, and its preparation process also has the problems of low production efficiency and long production time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cathode slurry of lithium ion batteries on production line and preparation method of cathode slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] a) Using artificial graphite as the negative electrode active material, weigh 100 g of the total raw materials according to the mass ratio of graphite: superconducting carbon black: lithium polyacrylate = 89.5:2:8.5. Pour the above-mentioned raw materials into a 500mL agate ball mill jar, and put in 20 agate beads each with a diameter of 5mm, 10mm, and 15mm. Adjust the rotational speed of the ball mill, and mix at a rotational speed of 150r / min for 20 minutes to preliminarily mix the raw materials uniformly, thereby obtaining the first mixture.

[0030] b) Next, add 120 mL of deionized water into the agate jar, and mix at a speed of 700 r / min for 0.5 h to obtain a second mixture.

[0031] c) Finally, increase the rotation speed to 900r / min and continue mixing for 6h. Obtain the negative electrode slurry of lithium ion battery.

[0032] The viscosity of the negative electrode slurry was tested for viscosity, and the test result was 3993cps, meeting the viscosity range ...

Embodiment 2

[0034] The difference between the preparation of the negative electrode slurry of this embodiment and that of Example 1 is:

[0035] In step a), the number of each kind of agate beads in the ball mill is 30; the rotating speed is 200r / min, and the time is 30min.

[0036] In step b), the amount of deionized water added is 130 mL; the rotation speed is 800 r / min, and the time is 45 min.

[0037] In step c), the rotating speed is 1000r / min, and the time is 6.5h.

[0038] After the viscosity test, the test result of the negative electrode slurry in this embodiment is 3735 cps, meeting the viscosity range requirement.

[0039] The rest are consistent with those in Embodiment 1, and will not be repeated here.

Embodiment 3

[0041] The difference between the preparation of the negative electrode slurry of this embodiment and that of Example 1 is:

[0042] In step a), the number of each kind of agate beads in the ball mill is 40; the rotating speed is 300r / min, and the time is 30min.

[0043] In step b), the amount of deionized water added is 140 mL; the rotation speed is 900 r / min, and the time is 1 h.

[0044] In step c), the rotating speed is 1100r / min, and the time is 7h.

[0045] After a viscosity test, the test result of the negative electrode slurry in this embodiment is 3562 cps, meeting the viscosity range requirement.

[0046] The rest are consistent with those in Embodiment 1, and will not be repeated here.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of lithium ion batteries and particularly relates to cathode slurry of the lithium ion batteries on a production line and a preparation method of the cathode slurry. The cathode slurry comprises 179 parts of cathode active substance, 4 parts of conductive agent and 17 parts of lithium polyacrylate, wherein the lithium polyacrylate is used as the adhesive. Compared with a traditional adhesive, the lithium polyacrylate has ionic conductivity and can integrally the conductivity of the cathode slurry. The cathode slurry is prepared by a subsection ball milling method, the materials are sufficiently stirred to avoid slurry settling, and accordingly the dispersing performance of the cathode slurry is increased greatly. The cathode slurry has the advantages that the cathode slurry is good in dispersity, moderate in viscosity, good in conductivity, low in cost, green, environmentally friendly and widely applicable to the production line for producing lithium ion batteries, the process of the cathode slurry is optimized, and the production efficiency of the lithium ion batteries can be increased while the overall performance of the produced lithium ion batteries can be increased.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a negative electrode slurry of lithium ion batteries on a production line and a preparation method thereof. Background technique [0002] Due to the widespread use of non-renewable resources such as petroleum, the problems of energy depletion and environmental protection have attracted more and more attention. In order to solve the above problems, new renewable resources represented by wind energy, solar energy, and tidal energy have gradually attracted the attention of researchers. However, renewable resources are generally intermittent, and will disappear if they are not stored in time, thus affecting their application in actual production and life. Rechargeable secondary batteries are used as energy storage devices in new energy development and energy storage, especially for storing electricity generated by solar and wind energy. [0003] Lithium-io...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/587H01M4/62H01M4/04H01M10/0525
CPCH01M4/04H01M4/364H01M4/587H01M4/622H01M10/0525H01M2004/027Y02E60/10
Inventor 余家乐张海燕李文武张宇杰
Owner GUANGDONG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com