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

A method for reclaiming lithium iron phosphate material from waste lithium iron phosphate battery positive plate

A technology for lithium iron phosphate and battery positive electrode, which is applied in the field of recycling lithium iron phosphate material from the positive electrode sheet of waste lithium iron phosphate battery, which can solve the problem of difficult product consistency, failure to meet lithium iron phosphate, and raw material quality changes Large and other problems, to achieve the effect of low cost, easy operation and simple steps

Active Publication Date: 2018-09-18
HEFEI GUOXUAN HIGH TECH POWER ENERGY
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not produce secondary pollution, but it is difficult to remove impurities, which makes the quality of raw materials vary greatly, making it difficult to ensure product consistency, and cannot meet the needs of industrialized large-scale production and recovery of lithium iron phosphate

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 method for reclaiming lithium iron phosphate material from waste lithium iron phosphate battery positive plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 Shown, a kind of method that reclaims ferrous phosphate lithium material from waste lithium ferrous phosphate battery positive plate, comprises the steps:

[0026] 1. Pretreatment: roast the positive electrode sheet of the waste lithium ferrous phosphate battery at a temperature of 400°C for 4 hours, then pulverize it, sieve and recover the aluminum sheet of the positive electrode, and obtain the waste lithium iron phosphate slurry.

[0027] 2. Flotation: Treat the positive electrode waste slurry with deionized water, stir or ultrasonically oscillate at 100°C for 1 hour, remove the conductive agent by flotation, and obtain a mixture of lithium ferrous phosphate and binder.

[0028] 3. Extraction: Add the mixture of lithium ferrous phosphate and binder obtained above into the mixed solution of N-methylpyrrolidone and hydrochloric acid, and mix the mixture of lithium iron phosphate and binder with N-methylpyrrolidone and hydrochloric acid The mass ratio ...

Embodiment 2

[0034] 1. Pretreatment: roast the positive electrode sheet of the waste lithium ferrous phosphate battery at a temperature of 300°C for 4 hours, then pulverize it, sieve and recover the aluminum sheet of the positive electrode, and obtain the waste lithium iron phosphate slurry.

[0035] 2. Flotation: Treat the positive electrode waste slurry with deionized water, stir or ultrasonically oscillate at 20°C for 3 hours, remove the conductive agent by flotation, and obtain a mixture of lithium ferrous phosphate and binder.

[0036] 3. Extraction: the mixture of lithium ferrous phosphate and binder obtained in step 1 is added to the mixed solution of N-methylpyrrolidone and hydrochloric acid, the mixture of lithium iron phosphate and binder is mixed with N-methylpyrrolidone and The mass ratio of the hydrochloric acid mixture is 10:7, the volume ratio of N-methylpyrrolidone to hydrochloric acid is 1:1, stirred or ultrasonically oscillated for 3 hours at room temperature, and rested f...

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 method for recycling a lithium ferrous phosphate material from waste lithium ferrous phosphate battery positive plates, wherein the method comprises the following steps: roasting the waste lithium ferrous phosphate battery positive plates, crushing, sieving and recycling positive electrode aluminum sheets to obtain a lithium ferrous phosphate waste slurry; soaking the lithium ferrous phosphate waste slurry in deionized water, and floating to remove a conductive agent, to obtain a mixture of lithium ferrous phosphate and a binder; adding the mixture to a mixed solution of N-methylpyrrolidone and hydrochloric acid, and extracting the binder, to obtain a lithium ferrous phosphate crude product; heating to remove N-methylpyrrolidon NMP and hydrochloric acid; and filtering, washing and drying to obtain lithium ferrous phosphate. The conductive agent and the binder are gradually removed or separated, so as to obtain the lithium ferrous phosphate crude product; the method is simple in steps, easy to operate and low in cost, avoids the problem of energy consumption of high temperature roasting, also avoids the problem that acid soluble precipitated impurities are difficult to remove cleanly, and is conducive to industrialization realization.

Description

technical field [0001] The invention belongs to the technical field of recycling waste lithium ion batteries, and relates to a method for recycling lithium iron phosphate materials from positive plates of waste lithium iron phosphate batteries. Background technique [0002] Lithium-ion batteries are green batteries with a series of excellent properties, and have been widely used since their inception. Due to the advantages of high safety, high environmental protection, high specific energy, low price, and long life, lithium iron phosphate material has become the first choice material for lithium-ion power batteries, and lithium-ion batteries with lithium iron phosphate as the positive electrode material are now It has been widely used in power battery fields such as electric tools, electric bicycles, mopeds, golf prison cars, airplane model toys, and miner's lamps. With the application of lithium-ion secondary batteries using lithium iron phosphate as the positive electrode...

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): C01B25/45H01M10/54
CPCY02W30/84
Inventor 吴风霞
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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