Process for recovering carbon materials of battery cathode

A technology of battery negative electrode and recycling method, applied in battery recycling, recycling technology, waste collector recycling, etc., can solve problems such as poor battery performance, and achieve the effects of high production efficiency, excellent cycle performance and low cost

Active Publication Date: 2008-04-02
BYD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the disadvantages of poor performance of batteries made of negative electrode carbon materials recovered in the prior art, and to provide a method for recycling battery negative electrode carbon materials. The battery made of negative electrode carbon materials recovered by this method good performance

Method used

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  • Process for recovering carbon materials of battery cathode

Examples

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Effect test

Embodiment 1

[0029] This example is used to illustrate the recovery method of the battery negative electrode carbon material of the present invention.

[0030] Soak 1 kg of the lithium-ion secondary battery negative plate to be recovered in deionized water, the amount of deionized water is 5 liters, and the temperature is 90°C. After soaking for 24 hours, remove the current collector in the mixture with a mesh of 2 mm, then filter, then place the obtained solid matter in a high-temperature furnace, and heat it at 600°C for 6 hours under the protection of nitrogen, and then in Cool to room temperature under the protection of nitrogen to obtain graphite A1.

Embodiment 2

[0035] This example is used to illustrate the recovery method of the battery negative electrode carbon material of the present invention.

[0036] Soak 1 kg of the lithium-ion secondary battery negative plate to be recovered in an aqueous solution containing 1% AEO-9, the amount of the aqueous solution is 9 liters, and the temperature is 60° C. Stir for 10 minutes per hour at a speed of 300 rpm. Soak for 8 hours. The current collector in the mixture was removed with a mesh sieve having a mesh size of 2 mm, followed by filtration. On the filter device, the filtered solid matter was rinsed twice with deionized water, and the amount of each deionized water was 3 liters. Then bake the obtained solid substance in an oven at 100°C for 5 hours, cool it to room temperature in the oven, pulverize it in a pulverizer, and pass through a 120-mesh sieve; place the solid substance obtained above in a high-temperature furnace, Under protection, heat at 750°C for 3 hours, and then cool to ...

Embodiment 3

[0038] In addition to changing the soaking agent to an aqueous solution containing 3% AEO-6, and after obtaining the carbon material, soak it in 2 liters of deionized water for 20 minutes to remove the floating matter on the water surface, then filter it, and dry it in an oven at 200 ° C for 2 hours Except, all the other are identical with embodiment 2. Graphite A3 is obtained.

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Abstract

The invention discloses a method for recycling cathode carbolic materials of battery, wherein, the cathode carbolic materials are loaded on a current collection body by binding agents, forming a cathode piece of battery; the method includes the following steps that: firstly, according to the solid-liquid weight ratio of 1:3 to 30, the cathode piece of battery is put into the soaking agent with the temperature of 30 to 10 Celsius degrees for complete soaking, until the cathode materials are separated from the current collection body; secondly, the current collection body is taken out and filtered to get the solid materials; thirdly, under the protection of the non-oxidizing gas, the solid materials are heated at the temperature of 400 to 800 Celsius, getting the carbolic materials. The discharging capacity at the normal temperature and the multiplying power discharging performance of the battery of which the carbolic materials are recovered by the method of the invention are very close to those of the battery with the finished product carbolic materials for manufacturing, thereby the carbolic materials are recycled by the method of the invention complies with the production requirement.

Description

technical field [0001] The invention relates to a method for recycling battery electrode materials, in particular to a method for recycling battery negative electrode carbon materials. Background technique [0002] Lithium-ion battery is a new type of chemical power supply, which meets the requirements of the development of modern electronic products. This new battery technology has high energy density, high voltage, no pollution, no metal lithium, high cycle life, and no memory effect , fast charging and so on. Therefore, it is widely used in electronic equipment such as personal computers, mobile phones, and portable appliances. [0003] At present, carbon materials are widely used as battery anode materials in the industrial production of lithium-ion batteries. They are one of the main raw materials in lithium-ion batteries. The price is more expensive. However, there is always a certain degree of scrapping in the production process of lithium-ion battery negative elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54H01M6/52B09B3/00B09B5/00
CPCY02E60/12Y02W30/84
Inventor 刘卫平李科姜俊刚何珍
Owner BYD CO LTD
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