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Method for regenerating anode materials of waste lithium ion secondary battery

A positive electrode material and secondary battery technology, applied in the field of positive electrode material regeneration, can solve the problems of large chemical reagent consumption, complicated separation process, and easy pollution, and achieve significant economic benefits, simple process, and reduce pollution.

Inactive Publication Date: 2005-02-23
NANKAI UNIV
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Problems solved by technology

However, the chemical dissolution method needs to consume a large amount of chemical reagents, the separation process is complicated, the recovery cost is high, and it is easy to cause pollution.

Method used

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  • Method for regenerating anode materials of waste lithium ion secondary battery
  • Method for regenerating anode materials of waste lithium ion secondary battery
  • Method for regenerating anode materials of waste lithium ion secondary battery

Examples

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Embodiment 1

[0022] Cut open the casing of the 17500-type lithium-ion secondary battery that failed the charge-discharge cycle, sort out the positive electrode sheet, and heat it at 400°C for 6 hours in an air atmosphere to remove the adhesive; mechanically bond the aluminum foil substrate with the positive electrode The materials are separated, and the separated positive electrode material is roasted at 800°C for 5 hours in an air atmosphere to remove conductive agents such as carbon; the percentage content of lithium and cobalt elements in the high-temperature roasted positive electrode material is analyzed, based on the content of cobalt element, Use Li 2 CO 3 Supplement the lithium element so that the atomic ratio of lithium and cobalt is 1.05:1.00, mix the positive electrode material with adjusted ratio evenly, use a tubular resistance furnace, pre-fire and roast in the air atmosphere, and grind through a 38.5 μm sieve to obtain Reused cathode material LiCoO 2 , the regeneration flo...

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Abstract

The procedure of the recycling method is to cut the used lithium ion battery and take out the positive plate, process the positive plate with heating process to remove the bond between the aluminum foil and the positive pole material, by means of the mechanical or ultrasound shaking, the aluminum foil and the positive pole material are separated, process the positive pole material with the high-temperature handling, the content of the element in the positive pole material is analyzed. Mixing the lithium compound based on the supplement of the cobalt manganese or the nickel. After high-temperature and grinding processing, the positive pole material with excellent performance is recycled.

Description

technical field [0001] The invention relates to a method for regenerating positive electrode materials in waste lithium ion secondary batteries. Background technique [0002] Since the advent of lithium-ion batteries in the 1990s, due to their outstanding advantages such as high working voltage, large specific energy, small self-discharge, long cycle life, and good safety, and they are environmentally friendly, they have become popular in cameras, mobile phones, notebook computers and portable batteries. It is an ideal power source for miniaturization and light weight of electronic devices such as measuring instruments, and it will also be an ideal power source for light-duty high-energy power batteries of electric vehicles in the future. Generally, the service life of lithium-ion secondary batteries is between several hundred times and 1000 times. Decrease in battery capacity until the battery dies. At present, the cathode material of commercial lithium-ion secondary batt...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 魏进平阎杰孙欣高学平李宇展王晓宇翟金玲
Owner NANKAI UNIV
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