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Method for recycling and regenerating waste lithium ion battery electrode materials

A technology for lithium ion batteries and electrode materials, which is applied in the field of recycling and regeneration of cathode materials and anode materials of lithium ion batteries, can solve the problem of high energy consumption, and achieve the effects of efficient recovery, high added value of products, and easy operation.

Inactive Publication Date: 2016-10-05
MICROVAST POWER SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The recovery object of this technology is limited to positive electrode materials, and does not involve the recovery of negative electrode materials, and the whole process requires three times of heating, which consumes a lot of energy.

Method used

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  • Method for recycling and regenerating waste lithium ion battery electrode materials
  • Method for recycling and regenerating waste lithium ion battery electrode materials
  • Method for recycling and regenerating waste lithium ion battery electrode materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] After the waste soft-packed lithium titanate battery is tested and discharged, it is disassembled in the fume hood to select the positive electrode, negative electrode and separator, and the positive and negative electrodes are soaked in 8% ammonia water for 80 minutes, and then rinsed with clean water. Wash and dry at 120°C, put the obtained pole pieces into crucibles, and treat them in a muffle furnace at 400°C for 4 hours. Vibration can make the electrode material separate from the current collector metal foil, and obtain positive electrode powder materials and negative electrode powders containing conductive carbon. Body materials and collectors, recycling collectors.

Embodiment 2

[0035]After the waste soft-packed lithium titanate battery is tested and discharged, it is disassembled in a fume hood to select the positive electrode, negative electrode and separator, and the positive and negative electrodes are soaked in 1% ammonia water for 80 minutes, and then rinsed with clean water. Washing, drying at 120°C, putting the obtained pole pieces into crucibles respectively, and treating them at a high temperature of 500°C for 2.5 hours in a muffle furnace, vibration can make the electrode material separate from the metal foil of the current collector, and obtain the positive electrode powder material containing conductive carbon, the negative electrode Powder materials and collectors, recycling collectors.

Embodiment 3

[0037] After the waste soft-pack lithium titanate battery is tested and discharged, it is disassembled in a fume hood to select the positive electrode, negative electrode and separator, and the positive and negative electrodes are soaked in 28% ammonia water for 5 minutes, and then rinsed with clean water. Washing, drying at 120°C, putting the obtained pole pieces into crucibles respectively, and treating them at 600°C in a muffle furnace for 1.5 hours, vibration can make the electrode material separate from the current collector metal foil, and obtain positive electrode powder materials containing conductive carbon, negative electrode Powder materials and collectors, recycling collectors.

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Abstract

The invention discloses a method for recycling and regenerating waste lithium ion battery electrode materials, and belongs to the field of recycling and cyclic reuse of electrode materials. The method comprises the steps that waste lithium ion batteries are demounted, subjected to pole piece sorting, soaked with ammonium hydroxide, washed and dried; obtained positive pole pieces and negative pole pieces are subjected to high temperature treatment, a positive electrode powder material, a negative electrode powder material and a current collector are obtained through mechanical method separation; the obtained positive electrode powder material is subjected to lithium supplementing, calcination is carried out after sanding and spray drying, and a regenerated positive electrode material is obtained; the obtained negative electrode powder material is calcined after being subjected to sanding and spray drying, and a regenerated negative electrode material is obtained. According to the method, the positive electrode material and the negative electrode material are recycled, and the advantages of being low in energy consumption, simple in process, short in treatment period, good in regenerated material activity and free of three-waste pollution are achieved.

Description

technical field [0001] The invention belongs to the field of battery material recycling, and relates to a method for recycling positive electrode materials and negative electrode materials of lithium ion batteries. Background technique [0002] Since the commercialization of lithium-ion batteries in the 1990s, due to their advantages such as high voltage, high energy density, long cycle life, good safety, and no memory effect, they have gradually replaced other types of secondary batteries and are widely used in mobile phones. Communications, notebook computers, portable tools, electric bicycles and other fields. According to statistics, the global production of lithium-ion batteries exceeded 580 million in 2000, and the domestic production was about 100 million. In 2003, the global production reached 1.255 billion. In 2008, the output reached 2.71 billion. In 2010, the global production exceeded 3 billion. . With the development of economic technology and the development ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C22B7/00B22F1/00
CPCC22C1/1084B22F2998/10Y02W30/84H01M10/54B22F9/04B22F8/00B22F2009/001Y02W30/50B22F1/00B22F9/026B22F3/10Y02P10/20
Inventor 毕瑞周小平
Owner MICROVAST POWER SYST CO LTD
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