Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of high bonding strength negative electrode slurry and preparation method thereof

A negative electrode slurry, high bonding technology, applied in electrode manufacturing, structural parts, battery electrodes, etc., can solve problems affecting battery life, exposed foil, negative electrode material drop, etc., to improve negative electrode material drop phenomenon, improve peeling Strength, the effect of improving process efficiency

Active Publication Date: 2022-07-05
HEFEI GUOXUAN HIGH TECH POWER ENERGY
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current mass-produced lithium-ion batteries, the peel strength of the negative electrode material can reach 60-90N / m, but there is a big gap compared with the positive electrode
The peeling strength is low, and the negative electrode is prone to problems such as material drop and exposed foil, which directly affect the service life of the battery

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
  • A kind of high bonding strength negative electrode slurry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A high-bonding strength negative electrode slurry is made from the following raw materials by weight:

[0023] 95 parts of graphite, 2 parts of conductive agent, 1 part of styrene-butadiene emulsion, 1 part of oligoethylene oxide, 1 part of sodium carboxymethyl cellulose, 130 parts of deionized water; the conductive agent is a mixture of SP and KS6, And the weight ratio of SP and KS6 is 4:3; the solid content of styrene-butadiene emulsion is 40wt%, and the molecular weight of oligoethylene oxide is 2000;

[0024] The preparation method of the high bonding strength negative electrode slurry comprises the following steps:

[0025] S1, by weight, add 1 part of oligoethylene oxide and 50 parts of deionized water in the reactor, stir for 2 hours under the condition of vacuum tightness-0.09MPa, stirring speed 18 rev / min, add 1 part carboxymethyl cellulose sodium and 80 parts of deionized water, and continue to stir for 2 hours under the conditions of vacuum degree -0.09MPa a...

Embodiment 2

[0038] The high bonding strength negative electrode slurry proposed by the present invention, its raw materials include: negative electrode active material, binder, thickener, conductive agent and solvent; wherein, the binder is oligoethylene oxide and A mixture of styrene-butadiene emulsions.

Embodiment 3

[0040] The high bonding strength negative electrode slurry proposed by the present invention, its raw materials include: negative electrode active material, binder, thickener, conductive agent and solvent; wherein, the binder is oligoethylene oxide and A mixture of styrene-butadiene emulsions;

[0041] Among them, among the raw materials, the weight ratio of negative electrode active material, binder, thickener, conductive agent and solvent is 95:2:3:2:190;

[0042] The weight ratio of the oligoethylene oxide and the styrene-butadiene emulsion is 1:4, the solid content of the styrene-butadiene emulsion is 35 wt %, and the molecular weight of the oligoethylene oxide is 2000.

[0043] The present invention also proposes a method for preparing the high bonding strength negative electrode slurry, comprising the following steps:

[0044] S1. Mix the oligoethylene oxide with part of the solvent, stir and disperse for 2h, add thickener and the remaining solvent and continue to stir ...

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

PropertyMeasurementUnit
peel strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a negative electrode slurry with high bonding strength, the raw materials of which include: negative electrode active material, binder, thickener, conductive agent and solvent; lotion mixture. In the present invention, a certain ratio of oligoethylene oxide and styrene-butadiene emulsion is used to compound, because oligomerized ethylene oxide contains hydroxyl groups and can form hydrogen bonds with H, the styrene-butadiene emulsion can be effectively dispersed in the oligomerized epoxy In the ethane solution, gelation and agglomeration are prevented, and the process efficiency is greatly improved; at the same time, the bonding strength of the negative electrode material during the coating process is improved, the negative electrode material drop phenomenon is effectively improved, and the service life of the lithium ion battery is improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a high bonding strength negative electrode slurry and a preparation method thereof. Background technique [0002] Lithium-ion batteries have always attracted the attention of new energy companies at home and abroad due to their high cycle life, reliable safety, and environmental friendliness. However, the research on new lithium-ion batteries mainly focuses on the theoretical capacity of the positive electrode material, the structure of the negative electrode material, and the design and matching of other auxiliary materials. [0003] The material in the negative electrode slurry is mainly graphite, and other materials include binders, dispersants, and the like. In the current mass-produced lithium-ion batteries, the peel strength of the negative electrode material can reach 60-90 N / m, but it is far behind the positive electrode. The peel strength is low, and the ...

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 Patents(China)
IPC IPC(8): H01M4/62H01M4/04H01M10/0525
CPCH01M4/622H01M4/04H01M10/0525Y02E60/10
Inventor 陈晓磊
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com