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Method for ultrasonic-assisted hydrothermal restoration of lithium cobalt oxide material in spent lithium ion battery

A technology of lithium-ion batteries and lithium cobalt oxide, which is applied in the field of hydrothermal restoration of lithium cobalt oxide materials, and can solve the problems of secondary air pollution, strong corrosion of reaction equipment, and high energy consumption

Inactive Publication Date: 2012-10-03
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

High-temperature treatment of lithium cobalt oxide waste has problems such as high energy consumption, easy formation of secondary air pollution, and generation of cobalt oxygen inert substances.
The experimental temperature requirement for hydrothermal regeneration research is 200°C, and the experimental reaction time is 20 hours; high temperature environment and long reaction time, as well as the resulting strong corrosion to the reaction equipment, restrict the failure of lithium cobaltate hydrothermal application of restoration techniques

Method used

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  • Method for ultrasonic-assisted hydrothermal restoration of lithium cobalt oxide material in spent lithium ion battery

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 lithium cobalt oxide waste in an ultrasonic-hydrothermal reactor filled with 2M lithium hydroxide solution. The ultrasonic-hydrothermal reactor is equipped with electric stirrer, electric heating device, temperature sensor, water cooling system, airtight Reactor, and an ultrasonic horn is installed at the bottom of the closed reactor, and the head of the ultrasonic horn is submerged under the liquid surface;

[0019] (3) The power of the ultrasonic equipment is 650 W, the ultrasonic frequency is 25 kHz, heated to 150°C, and cooled naturally after ultrasonication for 12 hours;

[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 with deionized water for 3 to 5 times;

[0021] (5) Lithium cobalt oxide m...

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 cobaltate waste in an ultrasonic hydrothermal reactor filled with 1M lithium hydroxide solution. The reactor is equipped with an electric heating device, a stirring device, a temperature control device, and a water flow cooling device, and is installed at the bottom of the reactor. Ultrasonic horn, the head of the horn is submerged under the liquid surface;

[0026] (3) The power of the ultrasonic equipment is 650 W, the ultrasonic frequency is 25 kHz, heated to 200°C, and cooled naturally after ultrasonication for 4 hours;

[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 with deionized water for 3 to 5 times;

[0028] (5) Lithium cobalt oxide material obtained by filtration, dried in ...

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Abstract

The invention relates to a method for the ultrasonic-assisted hydrothermal restoration of a lithium cobalt oxide material in a spent lithium ion battery. The method specifically comprises the following steps of: separating the spent lithium ion battery in a mechanical stripping way to obtain powdery lithium cobalt oxide waste; impregnating the powdery lithium cobalt oxide waste into a 1 to 2 mol / L solution of lithium hydroxide, placing the mixed solution in an ultrasonic hydrothermal reactor, heating the reactor to 150 to 200 DEG C, and applying ultrasonic irradiation for 6 to 12 hours; cleaning and filtering the ultrasonically cooled mixed solution by using de-ionized water for three to five times to obtain black lithium cobalt oxide paste; and drying the black lithium cobalt oxide paste for 6 to 10 hours in an environment of 50 to 80 DEG C to obtain the restored lithium cobalt oxide material. By the ultrasonic-assisted hydrothermal restoration method, the lithium content of the lithium cobalt oxide material in the spent lithium ion battery is increased, the electrochemical performance of lithium cobalt oxide is regained, and the lithium cobalt oxide material can be reused as a cathode material to produce a new lithium ion battery. The lithium cobalt oxide material in the spent lithium ion battery can be effectively treated; and the method has the characteristics of simplicity, high operability, no secondary pollution and good social benefits, economic benefits and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for hydrothermal restoration of lithium cobalt oxide materials in a failed lithium-ion battery in cooperation with ultrasound. 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. When lithium-ion batteries are used in large quantities, it is bound to cause a large number of lithium-ion batteries to be scrapped. Lithium cobalt oxide is currently the only positive electrode active material that has been ...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCY02E60/12Y02W30/84
Inventor 贺文智朱曙光李光明黄菊文张哲鸣
Owner TONGJI UNIV
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