Method for oxidizing agent-aided restoration of failed lithium cobalt oxide under reinforcement of ultrasonic field
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A technology of lithium cobalt oxide and oxidant, applied in recycling technology, recycling of waste collectors, electrical components, etc., can solve the problems of strong corrosiveness of reaction equipment, long reaction time, environmental pollution, etc., and achieve good environmental benefits, electrochemical The effect of improved performance and considerable economic benefits
Inactive Publication Date: 2013-06-12
TONGJI UNIV
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The process of calcining lithium cobalt oxide at high temperature will produce harmful gas, cause environmental pollution, and consume a lot of energy. However, the hydrothermal treatment method requires high temperature and long reaction time, which is highly corrosive to the reaction equipment. Looking for an efficient and environmentally friendly treatment process Recycling the valuable components in waste lithium batteries is the direction of the development of waste lithium battery recycling technology, and it is also the demand for building a resource-saving and environment-friendly society
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Embodiment 1
[0020] (1) Select the discarded lithium-ion battery, discharge it and disassemble it to obtain the positive electrode aluminum foil;
[0021] (2) Put the positive electrode aluminum foil into a muffle furnace and calcinate at 380°C for 1.8 hours. After the temperature drops, shake the incinerated aluminum foil to make lithium cobalt oxide fall off from the current collector aluminum foil to obtain black lithium cobalt oxide powder ;
[0022] (3) Pour the mixed solution of lithium cobaltate waste and lithium hydroxide solution into the ultrasonic reactor, the volume of the mixed solution is 0.7L, and then add the oxidant (30% H 2 o 2 Solution) 50Ml; and quickly seal the ultrasonic reactor, the reactor is equipped with an electric heating device, a stirring device, a temperature control device, a water flow cooling device, and an ultrasonic horn is installed at the bottom of the reactor;
[0023] (4) The power of the ultrasonic equipment is 750W, the ultrasonic frequency is 25...
Embodiment 2
[0028] (1) Select the discarded lithium-ion battery, discharge it and disassemble it to obtain the positive electrode aluminum foil;
[0029] (2) Put the positive electrode aluminum foil into a muffle furnace and calcinate at 420°C for 2.2 hours. After the temperature drops, shake the burned aluminum foil to make lithium cobalt oxide fall off from the current collector aluminum foil to obtain black lithium cobalt oxide powder
[0030] (3) Pour the mixed solution of lithium cobalt oxide waste and lithium hydroxide solution into an ultrasonic reactor, the volume of the mixed solution is 0.7L, and the reactor is equipped with an electric heating device, a stirring device, a temperature control device, and a water flow cooling device, and Install an ultrasonic horn at the bottom of the reactor;
[0031] (4) The power of the ultrasonic equipment is 820W, the ultrasonic frequency is 25 kHz, heated in a closed autoclave at a constant temperature of 120°C, and ultrasonic radiation is ...
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Abstract
The invention relates to a method for oxidizing agent-aided restoration of failed lithium cobalt oxide under reinforcement of an ultrasonic field. The method comprises the following concrete steps: disassembling a lithium ion battery to obtain a positive electrode aluminum foil film, calcining the positive electrode aluminum foil film and shaking the positive electrode aluminum foil film to allow lithium cobalt oxide to fall off from a current collector aluminum foil so as to obtain a powdery lithium cobalt oxide material; immersing lithium cobalt oxide powder into a lithium hydroxide solution, dumping mixed liquor into an ultrasonic reaction vessel after mixing, adding an oxidizing agent, rapidly sealing the ultrasonic reaction vessel, carrying out heating to a temperature of 120 DEG C and applying ultrasonic radiation for 8 to 10 h; and after cooling of the ultrasonic reaction vessel, taking out a mixed solution and carrying out cleaning, filtering and drying so as to obtain a restored lithium cobalt oxide material. The method provided by the invention can effectively remove a part of organic matters adhered onto the surface of lithium cobalt oxide, increases lithium ion content in the failed lithium cobalt oxide and enables electrochemical performances of the restored lithium cobalt oxide material to be regenerated; the restored lithium cobalt oxide material can be used as a positive electrode material again for production of a new lithium ion battery; the method has the advantages of simple operation, easily controllable process, low energy consumption, environment friendliness and no generation of secondary pollutants.
Description
technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for oxidant-assisted restoration of a failed lithium cobaltate material under the strengthening of an ultrasonic field. Background technique [0002] Batteries are the power source of many electronic and electrical products, and there are various types. Among them, lithium batteries have become a new generation of green batteries due to their remarkable advantages, such as small size, light weight, no memory effect, and less pollution. The rapid development provides energy and power guarantee. [0003] Lithium batteries have been widely used in mobile phones, notebook computers, camcorders, digital cameras and other fields, and are expected to be applied in electric vehicles, aerospace and energy storage, etc., and reasonable and effective resource disposal of waste lithium batteries, especially for positive electrodes The recycling and reu...
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