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Method for recovering and recycling waste lithium ion battery cathode material

A lithium-ion battery and cathode material technology, which is applied in the field of lithium-ion battery material preparation and waste resource recycling, can solve the problems of low-cost metal loss environment, single battery material system, and narrow adaptability, so as to save resources, Effect of high added value and effective recycling

Inactive Publication Date: 2009-10-14
GUANGDONG BRUNP RECYCLING TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, domestic waste battery recycling technology research is still in its infancy, and the battery material system is single, the process is single, and the adaptability is narrow. Only high-priced metal compounds such as cobalt are recovered, and the loss of other low-content or cheap metals has not been solved. and possible environmental pollution

Method used

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  • Method for recovering and recycling waste lithium ion battery cathode material
  • Method for recovering and recycling waste lithium ion battery cathode material
  • Method for recovering and recycling waste lithium ion battery cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] After drying the lithium cobalt oxide cathode waste at 120°C for 5 hours, use a crusher to crush the waste until the maximum particle size is less than 100 μm, and then heat-treat the powder in an air atmosphere furnace at a constant temperature of 400°C for 5 hours, and then sieve to control the particle size range: D10 ≥3μm, D90≤35μm, D50 is 8μm~20μm, complete the recovery of lithium cobalt oxide cathode material. figure 2 It is the SEM image of the recycled lithium cobalt oxide cathode material. Using this recycled material to make 053450 full battery, the measured 1C discharge specific capacity of the recycled material is 144mAh / g, which is about 2mAh / g lower than the normal product. The recycled material has good cycle performance, and the capacity retention rate reaches about 82.5% after 300 1C cycles. image 3 It is the cycle performance graph of the recycled lithium cobalt oxide cathode material.

Embodiment 2

[0037] The experimental conditions are the same as in Example 1, except that lithium cobaltate cathode waste is replaced by LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 Cathode waste. Figure 4 LiNi for recycling 1 / 3 co 1 / 3 mn 1 / 3 o 2 SEM images of cathode waste. LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 The 1C discharge specific capacity of recycled materials is 143mAh / g, which is about 1.5mAh / g lower than that of normal products. The recycled material has good cycle performance, and the capacity retention rate reaches about 87% after 300 1C cycles. Figure 5 LiNi for recycling 1 / 3 co 1 / 3 mn 1 / 3 o 2 Cycling performance graph of the cathode material.

Embodiment 3

[0039] The experimental conditions were the same as in Example 1, except that the lithium cobaltate cathode waste was replaced with lithium manganate cathode waste. Figure 6 It is the SEM image of the recycled lithium manganate cathode waste. The 1C discharge specific capacity of recycled lithium manganate is 105mAh / g, which is about 3mAh / g lower than normal products. Recycled materials have qualified cycle performance, and the capacity retention rate reaches about 80% after 300 1C cycles. Figure 7 It is the cycle performance diagram of the recycled lithium manganese oxide cathode material.

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Abstract

The invention discloses a method for recovering and recycling waste lithium ion battery cathode material, belonging to the fields of lithium ion battery material preparation and recycling use of waste resources. The method has the technical proposal with the key points as follows: the recovered waste batteries are sorted, cathode waste material (after being sorted) which is stripped to remove the shell and generated in the production process of the lithium ion battery is directly crushed and ground, and then processed by the procedures such as aluminum removing, acid dipping, copper extracting, chemical purification and the like under different conditions, so that byproduct materials such as aluminum hydroxide, carbon black, graphite, copper sulphate and the like are generated; reaction products are added with precipitator with certain concentration for liquid-phase precipitation and then added with lithium source, so that cathode material can be generated in the high temperature environment. The technical proposal successfully realizes the valuable constituent recovery and cathode material regeneration of the waste lithium ion battery cathode material.

Description

Technical field: [0001] The invention discloses a method for recycling and regenerating cathode materials of waste lithium ion batteries, which belongs to the fields of preparation of lithium ion battery materials and recycling and utilization of waste resources. Background technique: [0002] Since the commercialization of lithium-ion batteries, they have been widely used due to their high energy density, light weight, long life and no memory. With the popularization of mobile phones, notebook computers, digital cameras, MP4&5, handheld computers, Bluetooth headset communication tools and digital electronic products, my country has become the world's largest producer and consumer of lithium-ion batteries. By 2008, the global annual demand for lithium-ion batteries was about 2.7 billion, of which nearly 45% were produced in China, and nearly 30% were consumed in China. During the production process of lithium-ion battery manufacturers, a lot of cathode waste and cathode was...

Claims

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Application Information

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IPC IPC(8): C01F7/02C01G3/10C01B31/02C01G51/00C01G53/00C01G45/00C01B25/45
Inventor 李长东唐红辉黄国勇
Owner GUANGDONG BRUNP RECYCLING TECH
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