Method for ultrasonically repairing lithium cobaltite material of failed lithium ion battery

A technology of lithium-ion battery and lithium cobalt oxide, which is applied in the direction of chemical instruments and methods, cobalt compounds, solid waste removal, etc., can solve problems such as high energy consumption, many process links, and overall process complexity, and achieve no secondary pollution , The process method is simple and the operability is strong

Inactive Publication Date: 2012-02-08
TONGJI UNIV
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of the recycling of lithium cobaltate in the lithium battery industry, when it fails, the lithium cobaltate waste is separated and refined, and then reused for the preparation of the positive electrode of the lithium battery. The whole process has many links and involves cobalt. and multiple conversions of lithium product forms, the overall process is complex and energy-consuming

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Mechanically disassemble the used lithium-ion mobile phone battery to obtain lithium cobalt oxide waste in the positive electrode material;

[0018] (2) Place the lithium cobalt oxide waste in a 2mol / L lithium hydroxide solution reactor, install a condensation reflux device in the reactor, and install an ultrasonic horn, and the head of the horn is submerged under the liquid surface;

[0019] (3) The power of the ultrasonic equipment is 1000 W, the ultrasonic frequency is 25 kHz, the ultrasonic radiation is carried out at room temperature, and after 6 hours of ultrasonic, it is naturally cooled;

[0020] (4) When the ultrasonic reactor is cooled to room temperature, the lithium cobalt oxide material in the lithium hydroxide solution is filtered and washed 3 times with deionized water;

[0021] (5) Lithium cobalt oxide material obtained by filtration, dried in an environment of 80°C for 6 hours, and recovered to obtain lithium cobalt oxide material that can be recycl...

Embodiment 2

[0024] (1) Mechanically disassemble the used lithium-ion mobile phone battery to obtain lithium cobalt oxide waste in the positive electrode material;

[0025] (2) Place the lithium cobalt oxide waste in a 1M lithium hydroxide solution reactor, install a condensation reflux device in the reactor, and install an ultrasonic horn, and the head of the horn is submerged under the liquid surface;

[0026] (3) The power of the ultrasonic equipment is 1000 W, the ultrasonic frequency is 25 kHz, the ultrasonic radiation is carried out at room temperature, and after 12 hours of ultrasonic, it is naturally cooled;

[0027] (4) When the ultrasonic reactor is cooled to room temperature, the lithium cobalt oxide material in the lithium hydroxide solution is filtered and washed 3 times with deionized water;

[0028] (5) Lithium cobalt oxide material obtained by filtration, dried in an environment of 80°C for 6 hours, and recovered to obtain lithium cobalt oxide material that can be recycled ...

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Abstract

The invention relates to a method for ultrasonically repairing a lithium cobaltite material in a failed lithium ion battery. The method specifically comprises the following steps of: (1) separating lithium cobaltite powder waste from a used and failed waste lithium ion battery by using a mechanical separation method; (2) filling the lithium cobaltite powder waste in 1-2mol/L lithium hydroxide solution and performing ultrasonic radiation under a room temperature condition for 6-12 hours; (3) cleaning and filtering ultrasonically treated mixed solution by using de-ionized water to obtain black lithium cobaltite paste; and (4) drying under an environment of 50-80 DEG C for 6-10 hours to obtain a repaired lithium cobaltite material. By adopting the ultrasonic radiation method, regeneration ofthe failed lithium cobaltite material is realized, and the lithium cobaltite material can be newly used as a positive material to produce a new lithium ion battery. By adopting the method, the lithium cobaltite material which is produced in the waste lithium battery after use and failure can be effectively treated; and the method has the characteristics of simple process method, strong operability, no secondary pollution and the like, and has high social benefit, economic benefit and environmental benefit.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for ultrasonically repairing a lithium cobalt oxide material of a failed lithium ion battery. It is suitable for resource recovery and reuse of lithium-ion batteries that use expired lithium cobalt oxide materials. Background technique [0002] Lithium-ion batteries have significant advantages such as high voltage, large specific energy, long cycle life, good safety performance, small self-discharge, fast charge and discharge, wide operating temperature range, and relatively green environmental protection. They are widely used in mobile phones, notebook computers, Video cameras, digital cameras and other electronic products are expected to be widely used in electric vehicles, aerospace and energy storage. Lithium cobalt oxide is currently the only positive electrode active material that has been used in large-scale commercial applications in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00B09B3/00
CPCY02W30/20
Inventor 贺文智朱曙光李光明周旭黄菊文
Owner TONGJI UNIV
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