Solvothermal pretreatment method and application of waste lithium battery positive electrode material

A technology for waste lithium batteries and positive electrode materials, which is applied in the field of solvothermal pretreatment of waste lithium battery positive electrode materials, can solve problems such as not being universal, and achieve the effects of universal applicability, low cost, and high separation efficiency

Pending Publication Date: 2022-05-17
CENT SOUTH UNIV
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the complexity and large number of reactants make these methods less general

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
  • Solvothermal pretreatment method and application of waste lithium battery positive electrode material
  • Solvothermal pretreatment method and application of waste lithium battery positive electrode material
  • Solvothermal pretreatment method and application of waste lithium battery positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A solvothermal pretreatment method for waste lithium battery cathode materials, comprising the steps of:

[0056] Step S1, soak the positive electrode strip obtained by dismantling the waste commercial battery NCM523 with DMC, remove the residual electrolyte on the surface, then take it out, and put it into a blast drying oven to dry;

[0057] Step S2, cut the dried positive electrode strips into small strips, divide them into 4 parts on average, put them into the reaction kettle respectively, pour the ethanol solution, the volume ratio of the solution to the waste positive electrode strips is 2:1, and completely immerse the positive electrode strip. Put the reaction kettles into blast drying ovens at different temperatures (120°C, 130°C, 140°C and 150°C) and keep warm for 1 hour;

[0058] In step S3, the cooled reaction vessel is opened, the positive electrode strip is clamped out with tweezers, and the stripped positive electrode material is separated by hand.

Embodiment 2

[0060] A solvothermal pretreatment method for waste lithium battery cathode materials, comprising the steps of:

[0061] Step S1, soak the positive electrode strip obtained by dismantling the waste commercial battery NCM811 with DMC, remove the residual electrolyte on the surface, then take it out, and put it into a blast drying oven to dry;

[0062] Step S2, cut the dried positive electrode strips into small strips, put them into the reaction kettle, pour N-N dimethylformamide solution, the volume ratio of the solution to the waste positive electrode strips is 1:1, make it just submerge the positive electrode strips . Put the reaction kettle into a blast drying oven, and keep it warm for 1.5 hours at a temperature of 150°C.

[0063] In step S3, the cooled reaction kettle is opened, the positive electrode strip is clamped out with tweezers, and the positive electrode material can be separated from the aluminum foil as a whole by hand.

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 solvothermal pretreatment method of a waste lithium battery positive electrode material, a waste lithium battery positive electrode plate uses PVDF as a binder, and the method comprises the following steps: disassembling a waste lithium battery, removing residual electrolyte on the surface of an electrode, and obtaining a positive electrode strip; immersing the positive electrode strip in a certain amount of alcohol solvent, and processing for 40-150 minutes at the temperature of 120-180 DEG C, so that the positive electrode material and the aluminum foil current collector are separated, the positive electrode material falls off in a sheet shape, and the aluminum foil sheet is kept complete; and taking out the separated aluminum foil and positive electrode material from the organic solvent, and recovering to obtain the positive electrode active material. The solvothermal pretreatment method of the waste lithium battery positive electrode material provided by the invention has the advantages of simple process, high efficiency, environmental protection, low cost and the like. The invention also provides a lithium battery positive electrode material and a lithium battery.

Description

technical field [0001] The invention relates to the technical field of recovery of positive electrode materials of waste lithium batteries, in particular to a solvothermal pretreatment method and application of positive electrode materials of waste lithium batteries. Background technique [0002] Due to the advantages of Li-ion batteries in terms of lifespan and energy density, Li-ion batteries are continuously being produced to meet the growing demand for energy storage. It is estimated that between 2015 and 2040, the production of lithium-ion batteries for electric vehicles alone will reach 4 million tons. Therefore, recycling waste lithium batteries is an urgent task to alleviate supply chain constraints and protect the environment. [0003] However, the strong bonding ability between the cathode powder, the organic binder PVDF, and the Al foil hinders the subsequent recycling process. Therefore, pretreatment of aluminum foil and cathode materials is required to concent...

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): H01M10/54H01M10/052H01M4/525H01M4/58H01M4/505
CPCH01M10/54H01M10/052H01M4/525H01M4/5825H01M4/505H01M2004/028Y02W30/84
Inventor 陈根覃佐宇贾传坤周江
Owner CENT SOUTH 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
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap