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Method for recycling graphite from lithium battery negative electrode carbon powder and preparation method of graphene oxide

A lithium battery and graphene technology, applied in battery recycling, carbon compounds, recycling technology, etc., can solve the problems of organic and inorganic pollutant types, complex occurrence and removal mechanisms, etc., to improve the efficiency of chlorination conversion and improve water solubility Sexuality and decentralization, the effect of large economic value

Active Publication Date: 2022-01-18
南京恒泰环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More importantly, the types, occurrence and removal mechanisms of organic and inorganic pollutants on graphite electrodes of spent Li-ion batteries will become more complicated

Method used

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  • Method for recycling graphite from lithium battery negative electrode carbon powder and preparation method of graphene oxide

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Effect test

Embodiment 1

[0041] A method for reclaiming graphite from lithium battery negative electrode carbon powder and preparing graphene oxide from the recovered graphite as a raw material, the specific steps are:

[0042] (1) Add 3g of lithium battery negative electrode material carbon powder to the ball mill, control the speed at 380r / min, and ball mill for 60min.

[0043] (2) Fully grind 9 g of ammonium chloride and 3 g of negative electrode material carbon powder.

[0044](3) Put the ground mixture in a tube furnace, heat up to 300° C. at a heating rate of 5° C. / min under an argon atmosphere, and then bake it for 30 minutes.

[0045] (4) After roasting, take out the carbon powder and put it into a 250mL beaker, add 100mL of deionized water, control the temperature at 40°C, insert the ultrasonic vibrating rod into the solution, turn on the ultrasonic vibrating rod, control the power at 150W, and the ultrasonic time for 1h.

[0046] (5) After the reaction, the leaching liquid and the carbon p...

Embodiment 2

[0055] A method for reclaiming graphite from lithium battery negative electrode carbon powder and a method for preparing graphene oxide from the reclaimed graphite, the specific steps are:

[0056] (1) Add 3g of lithium battery negative electrode material carbon powder to the ball mill, control the speed at 300r / min, and ball mill for 90min.

[0057] (2) Fully grind 3g of ammonium chloride and 3g of negative electrode material carbon powder.

[0058] (3) Put the ground mixture in a tube furnace, heat up to 380° C. at a heating rate of 2° C. / min under an argon atmosphere, and then bake it for 30 minutes.

[0059] (4) After roasting, take out the carbon powder and put it into a 250mL beaker, add 100mL of deionized water, control the temperature at 50°C, insert the ultrasonic vibrating rod into the solution, turn on the ultrasonic vibrating rod, control the power at 200W, and the ultrasonic time It is 1.5h.

[0060] (5) After the reaction, the leaching liquid and the carbon pow...

Embodiment 3

[0069] A method for reclaiming graphite from lithium battery negative electrode carbon powder and a method for preparing graphene oxide from the reclaimed graphite, the specific steps are:

[0070] (1) Add 3g of lithium battery negative electrode material carbon powder to the ball mill, control the speed at 450r / min, and ball mill for 45min.

[0071] (2) Fully grind 6g of ammonium chloride and 3g of negative electrode material carbon powder.

[0072] (3) Put the ground mixture in a tube furnace, heat up to 450° C. at a heating rate of 8° C. / min under an argon atmosphere, and then bake it for 30 minutes.

[0073] (4) After roasting, take out the carbon powder and put it into a 250mL beaker, add 100mL of deionized water, control the temperature at 60°C, insert the ultrasonic vibrating rod into the solution, turn on the ultrasonic vibrating rod, control the power at 250W, and the ultrasonic time for 2h.

[0074] (5) After the reaction, the leaching liquid and the carbon powder ...

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Abstract

The invention discloses a method for recycling graphite from lithium battery negative electrode carbon powder and a preparation method of graphene oxide, and relates to the field of battery recycling. The method comprises the steps: adding carbon powder into a ball mill; grinding the ball-milled carbon powder and ammonium chloride; roasting the mixture in argon; putting the carbon powder into a container, controlling the temperature to be 40-70 DEG C, inserting an ultrasonic vibration rod, and carrying out ultrasonic treatment; performing suction filtration to obtain graphite; mixing graphite with concentrated H2SO4, and dropwise adding KMnO4; and adding deionized water for dilution, adding hydrogen peroxide, filtering, washing and drying to obtain graphite oxide, dispersing the graphite oxide in a sodium hydroxide solution, and carrying out ultrasonic separation, centrifugation, filtering, washing and drying. The method has the beneficial effects that the carbon powder is subjected to ball milling treatment, the negative electrode material is treated by a low-temperature chloridizing roasting method, water leaching is performed, the ultrasonic field is applied, lithium, cobalt, nickel, manganese, copper and other metals in the negative electrode carbon powder are leached out, and the regenerated graphite is obtained through precipitation, separation and purification.

Description

technical field [0001] The invention relates to the technical field of battery recycling, in particular to a method for recycling graphite from carbon powder at negative electrodes of lithium batteries and a method for preparing graphene oxide. Background technique [0002] Lithium-ion batteries are involved in almost every aspect of human life due to their high energy density and high efficiency as well as long cycle life and environmental friendliness. Because these batteries can be used in portable devices, laptops, PCs and mobile phones, and can constitute a high-energy power source for electric vehicles. Its potential applications are significant. However, the service life of lithium batteries is usually two to three years, so the number of discarded lithium batteries will increase significantly, causing serious pollution to the environment. [0003] How to solve the environmental pollution caused by lithium batteries has also become a research hotspot for scientists ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/205C01B32/198H01M10/54
CPCC01B32/205C01B32/198H01M10/54Y02W30/84
Inventor 曾桂生龚百川谭荣龚杰邓迪刘香宁米雪
Owner 南京恒泰环保科技有限公司
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