Supercharge Your Innovation With Domain-Expert AI Agents!

Method for preparing graphene by recovering graphite from waste lithium ion battery negative electrode material

A lithium-ion battery and negative electrode material technology, which is applied in the field of recycling graphite to prepare graphene, can solve problems such as danger and high requirements for instrument staff, and achieve the effects of high recovery rate, low cost and complete structure

Inactive Publication Date: 2020-07-07
CHINA UNIV OF MINING & TECH
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the leaching process, acid leaching is performed using a mixture of strong acid solution and hydrogen peroxide solution, or alkaline leaching is performed using a mixture of alkali solution and hydrogen peroxide solution. These solvents generally have certain risks. The operation has higher requirements on the instrument and the staff

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 preparing graphene by recovering graphite from waste lithium ion battery negative electrode material
  • Method for preparing graphene by recovering graphite from waste lithium ion battery negative electrode material
  • Method for preparing graphene by recovering graphite from waste lithium ion battery negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for preparing graphene from reclaiming graphite from waste lithium-ion battery negative electrode materials, the specific steps are:

[0037] (1) After fully discharging the used lithium manganese oxide battery, peel off the casing, disassemble the battery, and take out the positive and negative electrodes and store them separately. Put the negative plate in the deionized water solution, after soaking for 3 hours, completely separate the copper foil from the graphite, use the Buchner funnel to filter the graphene-containing aqueous solution, and wash the filter residue with deionized water for 3 times. ℃ in a vacuum drying oven for 12 hours to obtain a crude negative electrode carbon material, the SEM image of which is image 3 shown.

[0038] (2) Using choline chloride as the hydrogen bond acceptor and glycerol as the hydrogen bond donor, the molar ratio is 1:2, the temperature is 60°C, and stirred at 1000r / min for 1h in a magnetic stirrer to prepare a low-ec...

Embodiment 2

[0045] A method for preparing graphene from reclaiming graphite from waste lithium-ion battery negative electrode materials, the specific steps are:

[0046] (1) After fully discharging the used lithium cobalt oxide battery, peel off the shell, disassemble the battery, and take out the positive and negative electrodes and store them separately. Put the negative plate in the deionized water solution, after soaking for 3 hours, completely separate the copper foil from the graphite, use the Buchner funnel to filter the graphene-containing aqueous solution, and wash the filter residue with deionized water for 3 times. °C in a vacuum oven for 12 hours to obtain a crude negative electrode carbon material.

[0047] (2) Using nicotinic acid as a hydrogen bond acceptor and urea as a hydrogen bond donor with a molar ratio of 1:3 and a temperature of 40°C, stir in a magnetic stirrer at 800r / min for 3h to prepare a deep eutectic solvent.

[0048] (3) Extract the crude negative electrode ...

Embodiment 3

[0052] A method for preparing graphene from reclaiming graphite from waste lithium-ion battery negative electrode materials, the specific steps are:

[0053] (1) After fully discharging the used lithium iron phosphate battery, peel off the casing, disassemble the battery, and take out the positive and negative electrodes and store them separately. Place the negative electrode sheet in deionized water solution, soak for 1 hour, completely separate the copper foil from the graphite, use a Buchner funnel to filter the graphene-containing aqueous solution, and wash the filter residue with deionized water for 3 times. °C in a vacuum drying oven for 10 h to obtain a crude negative electrode carbon material.

[0054] (2) Use acetylcholine chloride as the hydrogen bond acceptor, xylitol as the hydrogen bond donor, the molar ratio is 1:1, the temperature is 30°C, stir at 600r / min for 12h in a magnetic stirrer to prepare a deep eutectic melt solvent.

[0055] (3) Extract the crude neg...

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 preparing graphene by recovering graphite from a waste lithium ion battery negative electrode material. The method comprises: (1) disassembling and separating a waste lithium ion battery, soaking and cleaning with a solvent, and drying to obtain a negative electrode carbon material crude product; (2) extracting and washing the crude product of the negative electrode carbon material by using a eutectic solvent, and carrying out magnetic stirring, ultrasonic oscillation, filtration and drying to obtain a negative electrode carbon material extracted by using the eutectic solvent; and (3) preparing graphene by using the negative electrode carbon material in the step (2) as a raw material through a Hummers oxidation-reduction method. The waste lithium ion battery negative electrode material is extracted and recovered by using the low-price and environment-friendly eutectic solvent; and the method is simple, the content of residual metal in the negative electrode carbon material extracted and washed by the eutectic solvent is relatively low, the recovery rate is relatively high, and the graphene prepared by taking the graphene as the raw material is relatively good in morphology, complete in structure and relatively good in practical value.

Description

technical field [0001] The invention belongs to the technical field of recovery and reuse of waste lithium batteries, and relates to the recovery of negative electrode materials of waste lithium ion batteries, in particular to a method for preparing graphene by recovering graphite from negative electrode materials of waste lithium ion batteries. Background technique [0002] As a good electrical energy carrier, lithium-ion batteries have the advantages of high voltage, large specific capacity, good cycle performance, and invalid memory. They are widely used in many fields such as electronic products, electric vehicles, and aerospace. As the country vigorously promotes new energy vehicles and energy storage markets, the output of lithium-ion batteries has also increased rapidly. However, a large number of lithium-ion batteries put into the market will inevitably face the problem of recycling after the battery life ends. In 2018, according to the statistics of GGII, the total ...

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): H01M10/54H01M10/0525H01M4/583
CPCH01M4/583H01M10/0525H01M10/54Y02E60/10Y02W30/84
Inventor 饶中浩乔羽刘昌会张天键吕冰茹贺靖峰段晨龙赵跃民
Owner CHINA UNIV OF MINING & TECH
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