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

Recovery method of anode materials for lithium-ion batteries

A lithium-ion battery and negative electrode material technology, which is applied in the field of lithium-ion battery negative electrode material recovery, can solve the problems of long high-temperature treatment time (1-24 hours, complicated processing procedures, unfavorable production efficiency, etc., and achieve the elimination of the process of ball milling and crushing , simple process and short production cycle

Active Publication Date: 2011-01-12
DONGGUAN AMPEREX TECH
View PDF0 Cites 36 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires the use of a large amount of soaking solvent (about 3-30 times the weight of the pole piece), and the soaking temperature is 40-100°C, and the soaking time is 8-48 hours. After soaking, a large amount of solvent is needed for filtration. Rinse, and the high temperature treatment time is very long (1-24 hours), the treatment process is complicated and the production cycle is long, which is not conducive to improving production efficiency

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
  • Recovery method of anode materials for lithium-ion batteries
  • Recovery method of anode materials for lithium-ion batteries
  • Recovery method of anode materials for lithium-ion batteries

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0033] The first embodiment: a pole piece recycling method.

[0034] Firstly, stack 1 kg of graphite negative pole pieces to be recovered neatly in a metal container in a dense manner and cover the surface with a layer of metal foil, and put it into a high-temperature furnace that has been heated to 400-600°C, preferably 500°C , take it out after baking at constant temperature for 10 minutes, and cool it to normal temperature in the air. At this time, the negative electrode material has completely fallen off from the current collector; Turn on the vibrating sieve machine, and select 100 mesh for the vibrating screen. After this process, copper foil scraps are obtained on the upper part of the screen, and graphite particles are obtained on the lower part; after that, the obtained graphite particles are passed through a 200 mesh screen to obtain qualified graphite particles in the lower part of the screen; finally, the Put the graphite particles with larger particle size in the...

no. 2 approach

[0035] The second embodiment: a slurry recovery method.

[0036] First, put 1 kg of graphite negative electrode slurry to be recovered into a high-temperature blast drying oven for low-temperature drying at a drying temperature of 100-200°C. After 12 hours, a larger graphite block is obtained; then, the obtained graphite block is placed in a Put it into a high-temperature furnace with a temperature of 400-600°C, preferably 500°C, bake at a constant temperature for 10 minutes, take it out, and cool it to room temperature in the air; after that, pass the obtained graphite particles through a 200-mesh sieve, Graphite particles with qualified particle size are obtained; finally, put the graphite particles with larger particle size on the upper part into a high-temperature furnace at 400-600°C, preferably 500°C, for secondary baking, cool to room temperature in air, and pass through the oven again. 200-mesh sieve, a small part of the graphite particles that cannot be sieved can be ...

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 discloses a recovery method of anode materials for lithium-ion batteries, comprising the following steps: 1) stacking up pole pieces in a metal container in a dense manner and covering the surfaces of the pole pieces with a layer of metal foils, placing the pole pieces in a high-temperature furnace at 400-600 DEG C to be baked for 5-50min, so that the adhesives are decomposed and lose adhering effects and all the anode powder naturally sheds from the current collector; and drying the size at low temperature and then baking the size in the high-temperature furnace for certain time; and 2) sieving the mixture baked at high temperature and recovering the qualified anode powder. In the method, through high-temperature treatment of the pole pieces, the adhesives are decomposed and lose adhering effects and all the anode materials can naturally shed from the current collector, and through sieving and detection, the recovered anode powder is proved to have electrochemical performance similar to that of the raw materials and can be directly put on production.

Description

technical field [0001] The invention relates to a method for recovering negative electrode materials of lithium ion batteries. Background technique [0002] At present, the negative electrode materials of lithium-ion batteries are mainly artificial graphite, natural graphite, mesophase carbon fiber balls and various modified graphites. In the existing production technology of lithium-ion batteries, the active material is generally prepared into a slurry, and then coated on a current collector to be used as a pole piece. In the slurry mixing process, unqualified slurry will inevitably be produced, and substandard waste pole pieces and scraps will also be produced in the subsequent pole piece coating and cutting process, which will lead to 10%-20% Negative electrode material loss. [0003] Recycling this part of the material is of great significance to the tight supply of materials and cost savings caused by the long production cycle. Therefore, it is indeed necessary to dev...

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): H01M10/54
CPCY02W30/84
Inventor 赖旭伦梅铭陈卫赵丰刚许瑞柳娜
Owner DONGGUAN AMPEREX TECH
Features
  • Generate Ideas
  • 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