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Production of LixCoO2 from recovering waste lithium ionic battery

A technology of lithium-ion batteries and ions, which is applied in the field of chemical separation and preparation of inorganic powders, and can solve problems such as high anti-corrosion requirements for equipment, environmental hazards, and atmospheric pollution.

Inactive Publication Date: 2007-08-15
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The disposal of scrapped lithium-ion batteries usually faces the following problems: First, the surface of the positive and negative electrodes of scrapped lithium-ion batteries usually contains a small amount of elemental lithium. Since metal lithium in the elemental state is highly flammable and explosive, This is a safety issue that requires special attention in battery disposal; in addition, cobalt is a heavy metal that can be harmful to the environment if not handled properly
However, the above methods still have certain deficiencies: First, the method of incineration to remove organic matter needs to be equipped with flue gas purification equipment, otherwise it will easily cause air pollution; in addition, under the condition of heating, the "residual powder" is dissolved with hydrochloric acid to prevent corrosion of the equipment High requirements and harsh operating environment

Method used

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  • Production of LixCoO2 from recovering waste lithium ionic battery

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Take various types of lithium-ion batteries, cut the battery in water, separate the positive electrode material from other components, weigh 150g of the positive plate, cut the positive plate into pieces smaller than 2cm×2cm, and put these pieces at room temperature Put into 300ml of N-methyl-2-pyrrolidone (NMP) liquid, heat the liquid to 85°C, and after 30 minutes, all the powder substances (including positive electrode active material Li x CoO 2 and carbon black) fall off into the liquid, take out the aluminum foil, filter the liquid and reclaim NMP (recyclable), wash the filtered powder with clear water, dry to obtain 127g (theoretical value should be 128.7g) black powder; The black powder was put into 1.4L concentration of 15% (wt.) nitric acid solution, and while stirring, was added dropwise to the solution with a concentration of 5% (wt.) H 2 o 2 Solution 0.18L, continue stirring for about 40 minutes, filter to obtain 2+ , Li + The nitrate solution of ion, the...

example 2

[0025] The precursor of the synthesized product was prepared by the same process as in Example 1, and the precursor was calcined at a temperature of 800 ° C for 8 hours to obtain Li with a grain size of less than 1 μm x CoO 2 Powder. The crystal phase analysis of the obtained powder is shown in the X-ray diffraction pattern of Figure 2, and the lattice parameters of the powder are shown in Table 2, indicating that the prepared Li x CoO 2 The powder has a regular hexagonal layered structure; the specific surface area of ​​the powder of sample 1 measured by the nitrogen BET multilayer adsorption method is 5.12m 2 g -1 ; The prepared Li x CoO 2 The primary discharge capacity is 147mAh·g -1 .

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Abstract

The method includes following steps: cut off batteries; separate anode materials, and cut the anode material into pieces; the anode pieces are steeped into N-Methyl-2-Pyrrolidone liquor, and are heated to separate activating material LiCoO2, and then acquire black powder. The black powder is putted into nitric acid solution or spirit of salt, and after filtering the nitric acid solution or chloride solution containing Co2+,Li+ ion is acquired. NH3íñN2O is added into Co2+,Li+ ion acidic solution, and meanwhile add surfactant; LiOH is added into suspension to adjust concentration of Li+ in suspension; the suspension is filtered and dried, then is sintered at 600-900 Deg C. to acquire LixCoO2 powder.

Description

technical field [0001] The invention relates to a method for recovering and preparing Li from discarded lithium-ion batteries. x CoO 2 The method belongs to chemical separation and preparation technology of inorganic powder. In particular, the process involved in this technology is a liquid-phase coating precipitation composite powder preparation process. Background technique [0002] Lithium-ion battery cathode material is made of active material LiCoO 2 , carbon black, acetylene black, and binder adhered to the aluminum foil in a certain proportion, the content of each part of the positive electrode material is shown in Table 1: [0003] Table 1 Composition of cathode materials for lithium-ion batteries [0004] substance LiCoO 2 carbon black, acetylene black binder aluminum foil Content (wt.%) 76.80 9.03 4.52 9.65 [0005] The disposal of scrapped lithium-ion batteries usually faces the following problems: F...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54H01M6/52
CPCY02E60/12Y02W30/84
Inventor 梁辉黄继承
Owner TIANJIN UNIV
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