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Regenerated lithium cobalt oxide and repairing method and application thereof

A repair method, lithium cobalt oxide technology, applied in chemical instruments and methods, cobalt compounds, lithium batteries, etc., can solve the problem of high cost, achieve the effect of simple method, reduction of waste water and waste gas discharge, and low temperature

Pending Publication Date: 2022-01-18
广东瑞科美电源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first purpose of the present invention is to propose a repair method for regenerated lithium cobalt oxide, which can effectively reduce the discharge of waste water and waste gas in the repair process of regenerated lithium cobalt oxide, and solve the excessive cost caused by the recovery process of the existing decommissioned lithium battery positive electrode materials. High technical problems are conducive to simplifying the repair process of regenerated lithium cobaltate and improving the purity of regenerated lithium cobaltate, so as to overcome the deficiencies in the prior art

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  • Regenerated lithium cobalt oxide and repairing method and application thereof
  • Regenerated lithium cobalt oxide and repairing method and application thereof
  • Regenerated lithium cobalt oxide and repairing method and application thereof

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Effect test

Embodiment 1

[0063] Embodiment 1-a kind of restoration method of regeneration lithium cobalt oxide

[0064] (1) Discharge the decommissioned lithium battery to 2V, disassemble it in an inert gas environment, and obtain the positive plate;

[0065] (2) Calcining the positive electrode sheet at 430°C in a vacuum environment with a vacuum degree of -0.5Mpa, and the calcination time is 1.5h. During the calcination process, the waste gas generated in the vacuum environment is extracted and absorbed with lye;

[0066] (3) After the calcined positive electrode sheet is pulverized, the invalid lithium cobalt oxide is separated by air flow flotation;

[0067] (4) Configure a LiOH solution with a concentration of 0.2mol / L. After fully mixing the invalid lithium cobaltate and LiOH solution, and the molar ratio of the invalid lithium cobaltate and LiOH solution is 1:1.5, carry out at a hydrothermal temperature of 200°C. Hydrothermal synthesis, and the hydrothermal reaction time is 4h, to obtain the h...

Embodiment 2

[0076] Embodiment 2-a kind of restoration method of regeneration lithium cobalt oxide

[0077] (1) Discharge the decommissioned lithium battery to 2V, disassemble it in an inert gas environment, and obtain the positive plate;

[0078] (2) Calcining the positive electrode sheet at 400°C in a vacuum environment with a vacuum degree of -0.3Mpa, and the calcination time is 4h. During the calcination process, the waste gas generated in the vacuum environment is extracted and absorbed with lye;

[0079] (3) After the calcined positive electrode sheet is pulverized, the invalid lithium cobalt oxide is separated by air flow flotation;

[0080] (4) Configure Li with a concentration of 0.25mol / L 2 CO 3 solution, will fail lithium cobaltate and Li 2 CO 3 After the solution is fully mixed, and the lithium cobalt oxide and Li 2 CO 3 The molar ratio of the solution is 1:2, the hydrothermal synthesis is carried out at a hydrothermal temperature of 220°C, and the hydrothermal reaction t...

Embodiment 3

[0085] Embodiment 3-a kind of restoration method of regeneration lithium cobalt oxide

[0086] (1) Discharge the decommissioned lithium battery to 2V, disassemble it in an inert gas environment, and obtain the positive plate;

[0087] (2) Calcining the positive electrode sheet at 550°C in a vacuum environment with a vacuum degree of -1Mpa, and the calcination time is 0.5h. During the calcination process, the waste gas generated in the vacuum environment is extracted and absorbed with lye;

[0088] (3) After the calcined positive electrode sheet is pulverized, the invalid lithium cobalt oxide is separated by air flow flotation;

[0089] (4) Configure LiNO with a concentration of 0.2mol / L 3 solution, will deactivate lithium cobalt oxide and LiNO 3 After the solution is fully mixed, and the lithium cobalt oxide and LiNO 3 The molar ratio of the solution is 1:1.5, the hydrothermal synthesis is carried out at a hydrothermal temperature of 180°C, and the hydrothermal reaction tim...

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Abstract

The invention discloses regenerated lithium cobalt oxide and a repairing method and application thereof, and the repairing method of the regenerated lithium cobalt oxide comprises the following steps: (1) disassembling a retired lithium battery to obtain a positive plate; (2) calcining the positive plate in a vacuum environment; (3) crushing the calcined positive plate, and separating out invalid lithium cobalt oxide through airflow flotation; (4) preparing a lithium salt solution, fully mixing the failed lithium cobalt oxide and the lithium salt solution, and performing hydrothermal synthesis; and (5) filtering the hydrothermal product to obtain a filter cake, and washing and drying the filter cake to obtain the regenerated lithium cobalt oxide. According to the regenerated lithium cobalt oxide and the repairing method and the application thereof provided by the technical scheme, the emission of waste water and waste gas in the repairing process of the regenerated lithium cobalt oxide can be effectively reduced, and the technical problem that the cost is too high in the recycling process of the existing retired lithium battery positive electrode material is solved, the repair process of the regenerated lithium cobalt oxide can be simplified, and the purity of the regenerated lithium cobalt oxide can be improved.

Description

technical field [0001] The invention relates to the technical field of lithium battery recycling, in particular to a regenerated lithium cobalt oxide and its restoration method and application. Background technique [0002] Lithium and lithium compounds are important energy materials, widely used in energy storage power supply and national defense construction. Although scrapped lithium-ion batteries do not contain heavy metals such as lead, cadmium, and mercury, and have relatively little environmental pollution, they contain valuable metals such as cobalt, nickel, manganese, and lithium, and toxic and harmful substances such as lithium hexafluorophosphate. Improper disposal can easily cause serious pollution. and waste of resources. Cobalt, lithium, copper, metal shells, nickel sheets, lithium-containing compounds and plastic separators in decommissioned lithium batteries are all precious resources and have extremely high recycling value. Therefore, the scientific and ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00H01M4/52H01M4/525H01M10/052H01M10/54
CPCC01G51/42H01M10/54H01M10/052H01M4/523H01M4/525H01M2004/028C01P2002/72C01P2006/80C01P2006/40Y02E60/10Y02W30/84
Inventor 赵玉振曹元成李首顶颜东
Owner 广东瑞科美电源技术有限公司