Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method for wet recovery of lithium elements from scrapped lithium iron phosphate batteries

A lithium iron phosphate battery, lithium iron phosphate technology, applied in battery recycling, waste collector recycling, non-metallic elements and other directions, can solve the problems of complex process, low lithium recovery rate and high recovery cost

Active Publication Date: 2021-09-10
XUCHANG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for wet recovery of lithium elements from scrap lithium iron phosphate batteries, to overcome the existing technology of low recovery rate of lithium elements, complicated process and high recovery cost in the process of wet recovery of lithium iron phosphate materials defect

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
  • Method for wet recovery of lithium elements from scrapped lithium iron phosphate batteries
  • Method for wet recovery of lithium elements from scrapped lithium iron phosphate batteries
  • Method for wet recovery of lithium elements from scrapped lithium iron phosphate batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Take ethylene carbonate (CE) 10%, bentonite 1%, calcium hydroxide (Ca(OH) 2 ) 87.7%, ethylenediaminetetraacetic acid (EDTA) 1%, dispersant CNF0.1% (purchased from Guangzhou Lihongji Chemical Co., Ltd.), AGITAN P803 0.1% (purchased from Nanjing Yuelai New Material Technology Co., Ltd.), fatty acid Polyoxyethylene ester 0.1%, mix the raw materials taken evenly, and ball mill at 250r / min for 1h to obtain 20g of additive A;

[0024] 2) Take ethylene carbonate (CE) 0.1%, ethylenediaminetetraacetic acid (EDTA) 1%, sodium hydroxide (NaOH) 97.6%, ammonium bicarbonate (NH 4 HCO 3 ) 1%, polyacrylamide ((C 3 h 5 NO)n) 0.1%, sodium dodecylbenzenesulfonate 0.1%, organopolysiloxane 0.1%, mix the raw materials evenly, and ball mill at 250r / min for 1h to obtain 20g of additive B;

[0025] 3) Take 15.7760g of lithium iron phosphate positive electrode active material and use sulfuric acid with a mass concentration of 2% for acid leaching. The molar mass ratio of lithium iron phosp...

Embodiment 2

[0031] 1) Take ethylene carbonate (CE) 10%, bentonite 1%, calcium hydroxide (Ca(OH) 2 ) 87.7%, ethylenediaminetetraacetic acid (EDTA) 1%, dispersant CNF0.1%, AGITAN P803 0.1%, fatty acid polyoxyethylene ester 0.1%, the raw materials were mixed evenly, 300r / min ball milled for 1h, and the auxiliary Agent A20g;

[0032] 2) Take ethylene carbonate (CE) 0.1%, ethylenediaminetetraacetic acid (EDTA) 1%, sodium hydroxide (NaOH) 97.6%, ammonium bicarbonate (NH 4 HCO 3 ) 1%, polyacrylamide ((C 3 h 5 NO)n) 0.1%, sodium dodecylbenzenesulfonate 0.1%, organopolysiloxane 0.1%, mix the raw materials evenly, and ball mill at 300r / min for 1h to obtain additive B20g

[0033] 3) Take 15.7760g of lithium iron phosphate positive electrode active material and use sulfuric acid with a mass concentration of 2% for acid leaching. The molar mass ratio of lithium iron phosphate to sulfuric acid is 1:2, the reaction time is 1h, the reaction temperature is 45°C, and the reaction ends After filtering,...

Embodiment 3

[0039] 1) Take ethylene carbonate (CE) 10%, bentonite 1%, calcium hydroxide (Ca(OH) 2 ) 87.7%, ethylenediaminetetraacetic acid (EDTA) 1%, dispersant CNF0.1%, AGITAN P803 0.1%, fatty acid polyoxyethylene ester 0.1%, the raw materials were mixed evenly, 350r / min ball milled for 1h, and the auxiliary Agent A20g;

[0040] 2) Take ethylene carbonate (CE) 0.1%, ethylenediaminetetraacetic acid (EDTA) 1%, sodium hydroxide (NaOH) 97.6%, ammonium bicarbonate (NH 4 HCO 3 ) 1%, polyacrylamide ((C 3 h 5 NO)n) 0.1%, sodium dodecylbenzenesulfonate 0.1%, organopolysiloxane 0.1%, mix the raw materials evenly, and ball mill at 350r / min for 1h to obtain 20g of additive B;

[0041] 3) Take 15.7760g of lithium iron phosphate positive electrode active material and use sulfuric acid with a mass concentration of 2% for acid leaching. The molar mass ratio of lithium iron phosphate to sulfuric acid is 1:2, the reaction time is 1h, the reaction temperature is 45°C, and the reaction ends After filte...

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 wet recovery of lithium elements from scrapped lithium iron phosphate batteries. According to the method, after iron phosphate is precipitated, an auxiliary agent A and an auxiliary agent B are added one by one, the auxiliary agent A can react with phosphate radicals and hydrogen phosphate radicals one step ahead through calcium ions to generate precipitates before the phosphate radicals and the hydrogen phosphate radicals react with lithium ions, the auxiliary agent B can remove the residual ferric ions in the solution and simultaneously remove the byproduct calcium sulfate when the auxiliary agent A is added, so that the loss amount of the lithium elements is greatly reduced, the recovery benefit is increased, the first recovery rate of the lithium elements can reach 86.14%, the purity can reach 99.89%, and the cycle recovery rate can reach 95.2%; and through the method, the step of washing and removing impurities of the lithium salt can be omitted, water resources are saved while the process is simplified, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the field of lithium battery recovery, in particular to a method for wet recovery of lithium elements from scrap lithium iron phosphate batteries. Background technique [0002] In recent years, lithium iron phosphate (LiFePO 4 ) batteries are developing rapidly in the field of renewable energy storage such as electric vehicles, hybrid vehicles and smart grids due to their excellent thermal safety, relatively low non-toxicity, high reversibility and low cost. It is predicted that from From 2015 to 2024, the global consumption of lithium iron phosphate batteries for automobiles is expected to exceed 220 billion US dollars; after lithium iron phosphate batteries are decommissioned, there will be a large amount of waste LiFePO 4 The battery needs to be dealt with. [0003] At present, the methods that can be applied to the recycling of lithium iron phosphate batteries include pyrometallurgical recycling methods, physical disassem...

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): C22B26/12C22B7/00H01M10/54C01B25/37
CPCC22B26/12C22B7/007H01M10/54C01B25/375Y02W30/84Y02P10/20
Inventor 董振伟熊海岩易贺迪张翼东
Owner XUCHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
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