Supercharge Your Innovation With Domain-Expert AI Agents!

Green stripping of waste lithium iron phosphate battery positive electrode material by using free radical system

A lithium iron phosphate battery and cathode material technology, applied in battery recycling, secondary battery, recycling technology and other directions, can solve problems such as high price, high energy consumption, environmental pollution, etc., and achieve fast peeling speed, low material consumption, Simple process effect

Pending Publication Date: 2022-02-08
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current research, although the separation methods of cathode materials and current collectors are various, there are still problems in practical applications, such as high energy consumption, environmental pollution, and high prices.

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
  • Green stripping of waste lithium iron phosphate battery positive electrode material by using free radical system
  • Green stripping of waste lithium iron phosphate battery positive electrode material by using free radical system
  • Green stripping of waste lithium iron phosphate battery positive electrode material by using free radical system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Discharge and disassemble the waste lithium iron phosphate battery to obtain the positive pole piece, the negative pole piece, the casing and the separator respectively.

[0025] Cut the disassembled positive pole piece and put it into a stripping solution composed of 1% sodium peroxide and 0.25% ferrous chloride, stir at a speed of 600r / min for 10min, and the stripping efficiency reaches 100%. Then remove the aluminum foil and dry it, separate the stripping solution from solid and liquid, add the stripping solution to the filtrate and continue stripping, and the filter cake is the stripped lithium iron phosphate positive electrode material.

Embodiment 2

[0027] Discharge and disassemble the waste lithium iron phosphate battery to obtain positive pole pieces, negative pole pieces, shells, diaphragms, etc.

[0028] Cut the disassembled positive pole piece and put it into a stripping solution composed of 5% potassium persulfate and 0.25% ferrous sulfate, stir at a speed of 100r / min for 20min, and the stripping efficiency reaches 100%. Then remove the aluminum foil and dry it, separate the stripping solution from solid and liquid, add the stripping solution to the filtrate and continue stripping, and the filter cake is the stripped lithium iron phosphate positive electrode material.

Embodiment 3

[0030] Discharge and disassemble the waste lithium iron phosphate battery to obtain positive pole pieces, negative pole pieces, shells, diaphragms, etc.

[0031] After the positive electrode sheet obtained by splitting is cut, put into the stripping solution composed of 0.5% potassium persulfate, 3% sodium persulfate, and 1% ferrous sulfate, stir for 20min at a speed of 300r / min, and the stripping efficiency up to 100%. Then remove the aluminum foil and dry it, separate the stripping solution from solid and liquid, add the stripping solution to the filtrate and continue stripping, and the filter cake is the stripped lithium iron phosphate positive electrode material.

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 provides a green and efficient stripping method of a waste lithium iron phosphate positive electrode material. The method is characterized by comprising the steps of preparing a stripping solution from a free radical donor and an initiator, putting a disassembled positive plate into the stripping solution, and completely stripping the lithium iron phosphate positive electrode material by regulating and controlling different reaction parameters. Corrosive substances such as strong acid and strong alkali are not used in the whole stripping process, so that the integrity of the recycled positive electrode material and aluminum foil is ensured. The method is simple in process, easy to operate, high in stripping efficiency, small in damage to the aluminum foil in the recovery process, free of any other waste, economical, environmentally friendly and high in practicability.

Description

technical field [0001] The invention relates to a method for stripping and recovering positive electrode materials of waste lithium iron phosphate batteries, which belongs to the new technology of solid waste treatment in the field of environmental protection and resource comprehensive utilization, and is suitable for clean and efficient stripping and recovery of positive electrode materials of waste lithium iron phosphate batteries. Background technique [0002] With the rapid development of the new energy industry, the transportation system has gradually entered the era of electric vehicles from the era of internal combustion engine vehicles. Followed by the use and elimination of a large number of lithium-ion batteries. At present, the recycling of waste lithium-ion battery elements has become a hot topic in global research, but there are still many problems in actual production. The stripping of waste lithium-ion battery cathode materials and aluminum foil is one of 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 Applications(China)
IPC IPC(8): H01M10/54H01M10/0525
CPCH01M10/54H01M10/0525Y02E60/10Y02W30/84
Inventor 张付申仵理想张志远
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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