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

Battery anode slurry, anode using same and battery manufacture method

A positive electrode slurry and positive electrode material technology, which is applied in electrode manufacturing, battery electrodes, non-aqueous electrolyte battery electrodes, etc., can solve the problems of poor high-temperature storage performance and high-temperature cycle performance of batteries

Active Publication Date: 2008-11-26
SHANGHAI BYD
View PDF1 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of poor high-temperature storage performance and high-temperature cycle performance of the battery obtained by using the positive electrode prepared by the existing lithium-ion battery positive electrode slurry, and to provide a battery that can have good high-temperature storage performance and high-temperature cycle performance. The positive electrode slurry of the battery and the preparation method of the positive electrode and lithium ion battery using the positive electrode slurry

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The preparation method of the negative electrode can adopt a conventional preparation method. For example, the negative electrode material can be mixed with a solvent, coated and / or filled on the conductive substrate, dried, rolled or not rolled to obtain the negative electrode. Wherein, the solvent can be selected from N-methylpyrrolidone (NMP), dimethylformamide (DMF), diethylformamide (DEF), dimethylsulfoxide (DMSO), tetrahydrofuran (THF) and One or more of water and alcohol. The amount of the solvent can make the paste have viscosity and fluidity, and it can be coated on the conductive substrate. Generally speaking, based on the weight of the negative electrode active material, the content of the solvent is 50-150% by weight, preferably 70-120% by weight. Among them, the methods and conditions of drying and calendering are well known to those skilled in the art. For example, the drying temperature is generally 100-150°C.

[0032] The non-aqueous electrolyte is a mixed s...

Embodiment 1

[0036] This embodiment illustrates the positive electrode slurry provided by the present invention and a method for preparing a positive electrode and a lithium ion battery from the positive electrode slurry.

[0037] (1) Preparation of positive electrode

[0038] 100 parts by weight of positive active material LiCoO 2 (D 50 Is 8 microns) and 4 parts by weight of conductive agent acetylene black are added to 50 parts by weight of non-polar solvent n-hexane and mixed uniformly to obtain the first mixture, and 4 parts by weight of binder polyvinylidene fluoride (PVDF) are added to 30 parts by weight of the polar solvent N-methylpyrrolidone (NMP) are uniformly mixed to obtain the second mixture, and then the first mixture and the second mixture are mixed and stirred in a vacuum mixer to form a uniform positive electrode slurry.

[0039] The slurry was evenly coated on an aluminum foil with a width of 400 mm and a thickness of 20 microns, and then dried at 135°C and rolled on a slitti...

Embodiment 2

[0046] This embodiment illustrates the positive electrode slurry provided by the present invention and a method for preparing a positive electrode and a lithium ion battery from the positive electrode slurry.

[0047] The positive electrode slurry, battery positive electrode and battery were prepared according to the same method as in Example 1, except that the non-polar solvent used in the preparation of the positive electrode slurry was a mixture of 60 parts by weight of n-hexane and 20 parts by weight of toluene. The polar solvent used for preparing the positive electrode slurry was 16 parts by weight of N-methylpyrrolidone (NMP), and the lithium ion secondary battery A2 was prepared.

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

Disclosed is positive slurry of lithium ion batteries, the positive slurry comprises positive materials and solvent, the positive materials comprise positive active substances, binder and a conductive agent, the solvent comprises polar solvent and non-polar solvent, wherein based on the gross weight of the positive materials, the content of the non-polar solvent is 20-80% by weight percentage, and the weight ratio of the polar solvent and the non-polar solvent is 1:1-10. The lithium ion batteries prepared by the positive slurry has fine high-temperature storage performance and high-temperature circulation performance.

Description

Technical field [0001] The present invention relates to a battery positive electrode slurry, a positive electrode using the positive electrode slurry, and a method for preparing a battery. Specifically, the present invention relates to a battery positive electrode slurry, a positive electrode using the positive electrode slurry, and a lithium ion battery The preparation method. Background technique [0002] Lithium ion battery as a chemical power source refers to a secondary battery composed of two compounds that can reversibly insert and extract lithium ions as the positive and negative electrodes. When the battery is charged, lithium ions are extracted from the positive electrode and embedded in the negative electrode, and vice versa during discharge. Lithium-ion batteries mainly include an electrode group and a non-aqueous electrolyte. The electrode group and the non-aqueous electrolyte are sealed in a battery case. The electrode group includes battery electrodes and a separat...

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
IPC IPC(8): H01M4/02H01M4/04H01M10/38H01M4/13H01M4/62H01M10/0525
CPCY02E60/10
Inventor 吴长伟贾强仟雷磊曾诚
Owner SHANGHAI BYD
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