Separation and purification method for lithium ion battery positive electrode material and obtained lithium ion battery positive electrode material

A technology for lithium ion batteries and cathode materials, which is applied in the field of waste lithium ion battery recycling and resource recycling, can solve problems such as flammability, changing particle size, and destroying surface structure, and achieves less temperature treatment steps, mild treatment temperature, and recycling. Simple process effect

Pending Publication Date: 2020-02-18
武汉瑞杰特材料有限责任公司
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the problems of high energy consumption, serious secondary waste, large input of toxic and corrosive acid and alkali, and lengthy process in traditional hydrometallurgy and pyrometallurgy, the scientific community has proposed a method of directly separating and recovering positive electrode powder and removing it. complicated method
[0004] The main recovery and separation methods include solvent immersion method (including two ideas of dissolving binder and dissolving aluminum foil), high temperature heat treatment method and crushing method. Their respective advantages and disadvantages are as follows: 1. The method of dissolving binder has good separation effect, but 1) The organic solvent is expensive and flammable; 2) The drying energy consumption is high
2. The method of dissolving aluminum foil completely removes aluminum, but 1) acid-base reagents are expensive, highly corrosive, poor in safety, and require high equipment; 2) produce dangerous gases such

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
  • Separation and purification method for lithium ion battery positive electrode material and obtained lithium ion battery positive electrode material
  • Separation and purification method for lithium ion battery positive electrode material and obtained lithium ion battery positive electrode material
  • Separation and purification method for lithium ion battery positive electrode material and obtained lithium ion battery positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0059] Example 1

[0060] 1) Cut the waste pole piece of the 532 secondary ball disassembled from the retired battery into 4cm 2 The size and the bowl capacity is 1kg / bowl (330*330*65mm).

[0061] 2) At 5m 3 Under an air atmosphere of 5°C / min, the PVDF is pyrolyzed at a constant temperature of 450°C / 2h at a heating rate of 5°C / min. Each furnace sinters 4 pots, placed in two layers and two rows.

[0062] 3) Use 50 mesh and 300 mesh screens to shake off the sintered pole piece. After shaking for 7 minutes, the powder removal efficiency is 98%. When it is greater than> 95%, it is considered that the powder is completely removed and the shaking is stopped. The aluminum foil is mainly concentrated above 50 mesh, and the powder is mainly concentrated below 300 mesh. There is almost no 300 mesh sieve.

[0063] 4) The powder material below 300 mesh is impurity removed with a winnowing pressure of 1 MPa to obtain separation and purification material 1.

[0064] Test the separation and purifica...

Example Embodiment

[0070] Example 2

[0071] 1) Cut the waste pole piece of the blended material of LCO and NCM111 from the decommissioned battery to 4cm 2 The size and the bowl capacity is 1kg / bowl (330*330*65mm).

[0072] 2) At 5m 3 Under an air atmosphere of 5℃ / min, PVDF is pyrolyzed at a constant temperature of 490℃ / 2h. Each furnace sinters 4 pots, placed in two layers and two rows.

[0073] 3) Use 50 mesh and 300 mesh screens to shake off the sintered pole piece. After shaking for 5 minutes, the powder removal efficiency is greater than> 95%. It is considered that the powder is completely removed and the shaking is stopped. The aluminum foil is mainly concentrated above 50 mesh, and the powder is mainly concentrated below 300 mesh. There is almost no 300 mesh sieve.

[0074] 4) Purify the powder material below 300 mesh with a winnowing pressure of 1MPa to obtain separation and purification material 2.

[0075] The purified material 2 is tested, and the test results are as follows:

[0076] Such as ...

Example Embodiment

[0080] Example 3

[0081] 1) Cut the 532 secondary ball leftover material to 10cm 2 The size and the bowl capacity is 1kg / bowl (330*330*65mm).

[0082] 2) At 5m 3 Under an air atmosphere of 5℃ / min, PVDF is pyrolyzed at a constant temperature of 450℃ / 1h. Each furnace sinters 4 pots, placed in two layers and two rows.

[0083] 3) Use 50 mesh and 300 mesh screens to shake off the sintered pole piece. After shaking for 10 minutes, the powder removal efficiency is greater than> 95%. It is considered that the powder is completely removed and the shaking is stopped. The aluminum foil is mainly concentrated above 50 mesh, and the powder is mainly concentrated below 300 mesh. There is almost no 300 mesh sieve.

[0084] 4) The powder material below 300 mesh is impurity removed with a winnowing pressure of 1 MPa to obtain separation and purification material 3.

[0085] 5) Since the raw material is scrap, the material does not have defects such as lack of lithium, so it is directly used as the p...

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

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of waste lithium ion battery recovery and resource cyclic utilization, and particularly relates to a separation and purification method for a lithium ion battery positive electrode material and the obtained lithium ion battery positive electrode material. The method comprises the following steps of: (1) heating crushed materials of a lithium battery positive electrode recycled material at a low temperature until an adhesive is invalid to obtain a mixture with a current collector and a to-be-purified lithium battery positive electrode material separated, 2) performing vibration screening on the mixture with the current collector and the to-be-purified lithium battery positive electrode material separated to obtain the to-be-purified lithium battery positive electrode material from which the current collector is separated, and 3) winnowing the to-be-purified lithium battery positive electrode material from which the current collector is separated to obtain the lithium battery positive electrode separation and purification material. Full-dry purification of the lithium ion battery positive electrode material is realized, and the lithium battery positive electrode purification material obtained by purification is high in purity.

Description

technical field [0001] The invention belongs to the technical field of waste lithium ion battery recycling and resource recycling, and in particular relates to a method for separating and purifying positive electrode materials of lithium ion batteries and the obtained lithium ion battery positive electrode materials. Background technique [0002] Due to the advantages of high specific capacity, high voltage and long cycle, lithium-ion batteries have developed rapidly in the fields of 3C, power and energy storage, and their output has increased year by year. However, the service life of lithium-ion batteries is about 5-10 years. The rapid development of lithium-ion battery industry will inevitably bring a huge amount of waste batteries. It is estimated that in 2020, there will be 500,000 tons of decommissioned batteries. According to estimates, the value created by extracting metals such as cobalt, nickel, manganese, lithium, iron and aluminum from waste power batteries will...

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): H01M10/54H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525H01M10/54H01M2004/028Y02E60/10Y02W30/84
Inventor 不公告发明人
Owner 武汉瑞杰特材料有限责任公司
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