Lithium battery anode recycled material dry purification separation and regeneration method and obtained lithium battery anode recycled material

A technology for recycling materials, purification and separation, applied in battery recycling, chemical instruments and methods, recycling technology, etc., can solve problems such as damaged structures, and achieve good performance, high purity, morphology and crystal form recovery.

Inactive Publication Date: 2020-02-28
武汉瑞杰特材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above recovery method aims to recover the elements in the positive electrode material in the form of simple substance, alloy, or solution containing metal ions, and can obtain a relatively pure product, but destroys the original structure of the material

Method used

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  • Lithium battery anode recycled material dry purification separation and regeneration method and obtained lithium battery anode recycled material
  • Lithium battery anode recycled material dry purification separation and regeneration method and obtained lithium battery anode recycled material
  • Lithium battery anode recycled material dry purification separation and regeneration method and obtained lithium battery anode recycled material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] 1) 4kg cut into 1*1cm 2 The 523 leftovers were divided into 4 burning bowls, and de-powdered at 450°C / 1h under air atmosphere.

[0060] 2) After shaking for 5 minutes, the de-powdering efficiency reaches 98%, which is considered to be complete. The Al content is about 0.3%, the C content is about 1%, and Li / Me=0.95.

[0061] 3) With 4mol / L LiOH, under the condition of 220℃ / 4h, 100g of 523 powder is hydrothermally supplemented with lithium, where n Li+ / n 正极材料 =1:1.

[0062] 4) After cooling to room temperature, filter, and vacuum-dry the filter cake at 130°C / 4h. The test results show that the Al content is lower than the ICP detection limit, the C content is 0.019%, and Li / Me=1.03.

[0063] 5) After grinding and crushing, pass through a 300-mesh sieve to collect the powder.

[0064] 6) Put the powder into a bowl, and sinter at 680°C / 8h in an oxygen atmosphere to obtain Restoration Material 1.

[0065] 7) The restoration material 1 is tested, and the results are as...

Embodiment 2

[0070] 1) Cut to 2*2cm 2 100g 523 leftovers of the size were placed in a crucible (stacked thickness is about 1cm), and then the PVDF was invalidated in the air atmosphere of the tube furnace at 400°C / 2h.

[0071] 2) The positive electrode recovery material was manually knocked off from the thermally expired PVDF pole piece, and passed through a 300-mesh sieve. The de-powdering efficiency is greater than 98%, and it is considered that the de-powdering is complete. The Al content obtained from the test is about 0.236%, the C content is about 1%, and Li / Me=0.95.

[0072] 3) With 2mol / L LiOH, under the condition of 220°C / 4h, the above powder is hydrothermally supplemented with lithium, where n Li+ / n 正极材料 =1:2.

[0073] 4) After cooling to room temperature, filter, and vacuum-dry the filter cake at 130°C / 4h. The test results show that the Al content is lower than the ICP detection limit, the C content is 0.019%, and Li / Me=1.016.

[0074] 5) After grinding and crushing, pass ...

Embodiment 3

[0078] 1) 100g cut into 10*10cm 2 The 523 leftovers are placed in a burning bowl in a layer-by-layer manner, and heat-treated at 600°C for 0.5h in a nitrogen atmosphere to make the adhesive invalid.

[0079] 2) The positive electrode powder was manually knocked off, and the powder removal efficiency reached 98%, which was considered to be complete. The Al content was about 0.226%, the C content was about 1%, and Li / Me=0.95.

[0080] 3) With 4mol / L LiOH, under the condition of 180℃ / 4h, the 523 powder is hydrothermally supplemented with lithium, where n Li+ / n 正极材料 =1:4, the solid-liquid ratio is 1:1.

[0081] 4) After cooling to room temperature, filter, and vacuum-dry the filter cake at 130°C / 4h. The test results show that the Al content is lower than the lower limit of ICP detection, the C content is 0.019%, and Li / Me=1.01.

[0082] 5) After grinding and crushing, pass through a 300-mesh sieve to collect the powder.

[0083] 6) Put the powder into a bowl, and sinter at 8...

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PUM

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Abstract

The invention belongs to the technical field of lithium ion battery anode material comprehensive utilization and particularly relates to a lithium battery anode recycled material dry purification separation and regeneration method and an obtained lithium battery anode recycled material. The invention provides a low-temperature dry heat treatment, water heating impurity removing and lithium supplementing and high-temperature solid phase regeneration combination technical scheme. The obtained lithium battery anode repaired material is recovered in terms of shape and crystal form, the performanceof the material is excellent, the purity is high, the material can be directly used for lithium battery production, and the performance of an obtained lithium battery is good.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of positive electrode materials of lithium ion batteries, and in particular relates to a method for dry purification, separation and regeneration of positive electrode recovery materials of lithium batteries and the obtained positive electrode recovery materials of lithium batteries. Background technique [0002] In recent years, due to its high energy density and long service life, lithium-ion batteries have made great progress in the fields of 3C and power, and their production capacity has also continued to expand. However, some experts predict that due to the shortage of the main raw materials, nickel, cobalt, manganese and lithium, the development of lithium-ion batteries will be impacted in 2050. Considering that there are abundant transition metals and lithium elements in the waste lithium-ion batteries and pole piece scraps accumulated year by year, it is imminent to adop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00H01M10/54
CPCB09B5/00H01M10/54B09B3/80B09B3/40Y02W30/84
Inventor 不公告发明人
Owner 武汉瑞杰特材料有限责任公司
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