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Method for recycling metal ion from waste lithium-ion battery

A technology of lithium-ion batteries and metal ions, which is applied in the field of waste recycling, can solve the problems of environmental secondary pollution and achieve the effects of small damage, recycling and low cost

Active Publication Date: 2012-06-27
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defect that the method for recycling valuable metal elements in the electrode materials of waste lithium-ion batteries will cause secondary pollution to the environment, the purpose of the present invention is to provide a method for recycling and regenerating metal ions in waste lithium-ion batteries, specifically Said, it relates to a method of reclaiming valuable metal elements in waste lithium-ion battery electrode materials and recycling the metal elements

Method used

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  • Method for recycling metal ion from waste lithium-ion battery
  • Method for recycling metal ion from waste lithium-ion battery
  • Method for recycling metal ion from waste lithium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Disassemble the waste lithium-ion battery manually in a fume hood after discharging, remove the iron shell and plastic skin, separate the positive and negative materials, recycle the copper foil of the negative current collector, cut the positive material into small pieces, and use NMP ultrasonic soaking treatment 1h, filter to obtain the precipitate, and recover the aluminum foil of the positive electrode collector; dry the precipitate and place it in a muffle furnace at 700°C for calcination for 5h to obtain LiCoO 2 The crude product was ball milled for 2h to obtain LiCoO 2 powder.

[0025] (2) LiCoO 2 Add the powder into 1.5M ascorbic acid solution, control the solid-liquid ratio = 25g / L, stir and react at 70°C for 20min, filter after the reaction, and obtain Li + and Co 2+ leaching solution.

[0026] Determination of Li in leaching solution by atomic absorption spectrophotometry + and Co 2+ The content of Li was calculated + and Co 2+ The leaching rates ...

Embodiment 2

[0030] (1) Disassemble the waste lithium-ion battery manually in a fume hood after discharging, remove the iron shell and plastic skin, separate the positive and negative materials, recycle the copper foil of the negative current collector, cut the positive material into small pieces, and use NMP ultrasonic soaking treatment 1h, filter to obtain the precipitate, and recover the aluminum foil of the positive electrode collector; dry the precipitate and place it in a muffle furnace at 700°C for calcination for 5h to obtain LiCoO 2 The crude product was ball milled for 2h to obtain LiCoO 2 powder.

[0031] (2) LiCoO 2 Add the powder into 0.8M ascorbic acid solution, control the solid-liquid ratio = 25g / L, stir and react at 80°C for 45min, filter after the reaction, and obtain the + and Co2+ leaching solution.

[0032] Determination of Li in leaching solution by atomic absorption spectrophotometry + and Co 2+ The content of Li was calculated + and Co 2+ The leaching rates w...

Embodiment 3

[0036] (1) Disassemble the waste lithium-ion battery manually in a fume hood after discharging, remove the iron shell and plastic skin, separate the positive and negative materials, recycle the copper foil of the negative current collector, cut the positive material into small pieces, and use NMP ultrasonic soaking treatment 1h, filter to obtain the precipitate, and recover the aluminum foil of the positive electrode collector; dry the precipitate and place it in a muffle furnace at 700°C for calcination for 5h to obtain LiCoO 2 The crude product was ball milled for 2h to obtain LiCoO 2 powder.

[0037] (2) LiCoO 2 Add the powder into 2.5M tartaric acid solution, control the solid-liquid ratio = 15g / L, stir and react at 80°C for 30min, filter after the reaction, and obtain + and Co 2+ leaching solution.

[0038] Determination of Li in leaching solution by atomic absorption spectrophotometry + and Co 2+ The content of Li was calculated + and Co 2+ The leaching rates wer...

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Abstract

The invention relates to a method for recycling metal ions from a waste lithium-ion battery, belonging to the technical field of changing waste into resources. The method comprises the following steps of: (1) discharging the waste lithium-ion battery, dismantling the battery to obtain the cathode material, carrying out MnP ultrasonic treatment on the cathode material, and then calcining and making into LiCoO2 powder; (2) adding ascorbic acid, tartaric acid, or pyruvic acid and carrying out acid leaching on the LiCoO2 powder to obtain leaching solution containing Li<1+> and Co<2+>; and (3) adding manganese and nickel salt into the leaching solution, mixing the leaching solution with LiOH solution, and synthesizing a ternary lithium-rich electrode material by a hydrothermal method. By adopting the method, the recycling and reuse of the electrode material of the waste lithium-ion battery can be realized. Moreover, natural organic acids are adopted for treatment, the problems of secondarypollution caused by harmful gases and acid pickle generated in the traditional treatment with strong acids can be solved, and the whole process is simple, environmentally friendly and efficient.

Description

technical field [0001] The present invention relates to a method for recovering and regenerating metal ions in waste lithium-ion batteries, in particular to a method for recovering valuable metal elements in electrode materials of waste lithium-ion batteries and recycling the metal elements. The utility model belongs to the technical field of waste recycling. Background technique [0002] Since the commercialization of lithium-ion batteries in 1990, they have gradually replaced traditional nickel-metal hydride batteries, nickel-cadmium batteries and lead-acid batteries due to their advantages such as high energy density, high working voltage, good safety, long cycle life and small self-discharge. Secondary batteries such as accumulators are widely used in fields such as mobile communications, instruments and meters, and computers, becoming the main force in the secondary battery market. At the same time, with the development of new energy strategies in various countries in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00
CPCY02P10/20
Inventor 李丽吴锋陈人杰张笑笑谢嫚刘剑锐
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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