Method for reparative regeneration of lithium cobalt oxide anode material in waste batteries

A technology for positive electrode materials and waste batteries, which is applied in the field of lithium cobalt oxide positive electrode material repair and regeneration, can solve the problems of high equipment investment requirements, high environmental protection pressure, high cost, etc., to improve charge and discharge stability and cycle performance, improve separation degree, The effect of preventing aluminum foil from breaking

Inactive Publication Date: 2017-02-22
JINGMEN GEM NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pyrochemical recovery requires high investment in equipment and high pressure on environmental protection. Metals need to be further processed before they can be used, and the cost is high.
[0005] In the prior art, regardless of wet recycling or fire recycling, metals such as Co and Li in waste batteries are recycled as raw materials, which has a long process and high recycling costs.

Method used

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  • Method for reparative regeneration of lithium cobalt oxide anode material in waste batteries
  • Method for reparative regeneration of lithium cobalt oxide anode material in waste batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1, clean the surface of the used lithium-ion battery, discharge the battery in a sodium chloride solution, and classify it according to the positive electrode material specifications lithium cobaltate, nickel-cobalt-manganese ternary material, lithium manganate, lithium iron phosphate, etc. Sorting lithium cobalt oxide batteries;

[0030] Step 2, cleanly disassemble the lithium cobalt oxide battery classified above, and sort out the positive electrode, electrolyte, negative electrode, and shell. The specific operation is to first cut the battery, take out the battery, and then put the battery positive Classification of poles and diaphragms;

[0031] Step 3, take 100Kg of the above-mentioned sorted positive pole pieces and spread them on the high-temperature resistant mesh belt with a thickness of 5cm, and control the mesh belt to vibrate continuously at a frequency of 50Hz through the mesh belt vibrator. The vibration motor of the vibrator adopts a frequency conver...

Embodiment 2

[0039] Step 1, clean the surface of the used lithium-ion battery, discharge the battery in a sodium chloride solution, and classify it according to the positive electrode material specifications lithium cobaltate, nickel-cobalt-manganese ternary material, lithium manganate, lithium iron phosphate, etc. Sorting lithium cobalt oxide batteries;

[0040] Step 2, cleanly disassemble the lithium cobalt oxide battery classified above, and sort out the positive electrode, electrolyte, negative electrode, and shell. The specific operation is to first cut the battery, take out the battery, and then put the battery positive Classification of poles and diaphragms;

[0041] Step 3, take 100Kg of the above-mentioned sorted positive pole piece and spread it on the high temperature resistant mesh belt with a thickness of 1cm, and control the mesh belt to vibrate continuously at a frequency of 5Hz through the mesh belt vibrator. 0.75Kw, the motor operating frequency is 5Hz; at the same time, ...

Embodiment 3

[0049] Step 1, clean the surface of the used lithium-ion battery, discharge the battery in a sodium chloride solution, and classify it according to the positive electrode material specifications lithium cobaltate, nickel-cobalt-manganese ternary material, lithium manganate, lithium iron phosphate, etc. Sorting lithium cobalt oxide batteries;

[0050] Step 2, cleanly disassemble the lithium cobalt oxide battery classified above, and sort out the positive electrode, electrolyte, negative electrode, and shell. The specific operation is to first cut the battery, take out the battery, and then put the battery positive Classification of poles and diaphragms;

[0051] Step 3, take 100Kg of the above-mentioned sorted positive pole piece and spread it on the high-temperature resistant mesh belt with a thickness of 3cm, and control the mesh belt to vibrate continuously at a frequency of 25Hz through the mesh belt vibrator. The vibration motor of the vibrator adopts a frequency conversio...

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Abstract

The invention provides a method for reparative regeneration of a lithium cobalt oxide anode material in waste batteries. The method includes: separating the anode material from lithium cobalt oxide waste batteries; laying positive pole pieces on a mesh belt, and controlling the mesh belt to vibrate continuously while controlling gas to pass through the meshes of the mesh belt from bottom to top; under conditions of vibration of the mesh belt and gas circulation of the meshes of the mesh belt, respectively heating the positive pole pieces for 10-60min at 100-300 DEG C and 380-520 DEG C, and collecting anode material powder I; sequentially subjecting the anode material powder I to screening removal of broken aluminum foils and electromagnetic removal of iron to obtain anode material powder II, and sampling to detect contents of Li, Co and Al in the anode material powder II; replenishing Li element and Al element to the anode material powder II according to a detection result obtained at the step 4 to obtain anode material powder III, wherein a mole ratio of Li to Co to Al is 1-1.05:1-x:x, and x refers to 0.05-0.2; subjecting the anode material powder III to ball milling in a high-energy ball mill to obtain anode material powder IV; calcining the anode material powder IV in a pure oxygen atmosphere to obtain repaired regenerated lithium cobalt oxide.

Description

technical field [0001] The invention relates to the recycling of waste batteries, in particular to a method for repairing and regenerating lithium cobalt oxide cathode materials in waste batteries. Background technique [0002] Since its commercialization, lithium-ion batteries have been widely used in civilian and military fields, such as cameras, Mobile phones, notebook computers, and portable thermometers, etc., while lithium-ion batteries are also one of the preferred light-weight high-energy power batteries for electric vehicles. [0003] After 500-1000 charge and discharge cycles of a lithium-ion battery, its active material will lose its activity, resulting in a decrease in the capacity of the battery and causing the battery to be scrapped. Lithium-ion battery recycling technology can be divided into wet recycling and fire recycling. The wet process includes pretreatment (dismantling, sorting, etc.) and recovery of cobalt and other metals. For the classified positi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCY02W30/84H01M10/54
Inventor 许开华张云河叶建郭苗苗
Owner JINGMEN GEM NEW MATERIAL
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