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Oxygen reduction catalyst using waste battery negative electrode graphite and preparation method thereof

A technology of waste batteries and catalysts, applied in battery electrodes, chemical instruments and methods, physical/chemical process catalysts, etc., can solve environmental pollution and other problems, achieve the effects of reducing environmental pollution, wide sources, and repairing active sites

Active Publication Date: 2020-09-11
GUANGDONG BRUNP RECYCLING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The harmful impurities in waste lithium-ion batteries will pollute the environment. At the same time, there are many resources and materials with recycling value in waste lithium-ion batteries. Therefore, it is urgent to recycle and utilize waste lithium-ion batteries.

Method used

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  • Oxygen reduction catalyst using waste battery negative electrode graphite and preparation method thereof
  • Oxygen reduction catalyst using waste battery negative electrode graphite and preparation method thereof
  • Oxygen reduction catalyst using waste battery negative electrode graphite and preparation method thereof

Examples

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Embodiment 1

[0038] The present embodiment utilizes the preparation method of the oxygen reduction catalyst of waste battery negative electrode graphite, comprises the following specific steps:

[0039] (1) drying the recovered waste graphite negative electrode at 65° C. for 6 hours, crushing and passing through a 300-mesh sieve to remove large particles of impurities in the negative electrode to obtain negative electrode graphite slag;

[0040] (2) The graphite slag is heat-treated at 400° C. for 2 hours in an air atmosphere, and the heating rate is 3° C. / min to remove organic impurities in the graphite slag;

[0041] (3) Get 4g treated graphite slag, 5g Fe 2 (SO4) 3 Carry out ball milling mixing with 5g melamine, the ball milling rate is 350 revolutions / min, and the ball milling time is 2h, obtains the catalyst precursor that mixes homogeneously;

[0042] (4) the catalyst precursor in N 2 Under the atmosphere, the heating rate is 5°C / min, and the carbonization treatment is carried out...

Embodiment 2

[0045] The preparation method of the carbon-based oxygen reduction catalyst utilizing the negative electrode graphite of the waste battery in this embodiment comprises the following steps:

[0046] (1) Dry the recovered waste graphite negative electrode at 80° C. for 4 hours, crush it and pass through a 400-mesh sieve to remove large particles of impurities in the negative electrode to obtain negative electrode graphite slag;

[0047] (2) The graphite slag is heat-treated at 350° C. for 3 hours in an air atmosphere, and the heating rate is 2° C. / min to remove organic impurities in the graphite slag;

[0048] (3) get graphite slag after 4g treatment, 4g FeCl 3 ·6H 2 O and 4g melamine are mixed by ball milling, the ball milling speed is 350 revs / min, and the ball milling time is 2h to obtain a homogeneously mixed catalyst precursor;

[0049] (4) the catalyst precursor in N 2 Under the atmosphere, the heating rate is 5°C / min, and the carbonization treatment is carried out at 8...

Embodiment 3

[0052] The present embodiment utilizes the preparation method of the oxygen reduction catalyst of waste battery negative electrode graphite, comprises the following steps:

[0053] (1) drying the recovered waste graphite negative electrode at 70° C. for 3 hours, crushing and passing through a 200-mesh sieve to remove large particles of impurities in the negative electrode to obtain graphite slag;

[0054] (2) The graphite slag is heat-treated at 480° C. for 2.5 hours in an air atmosphere, and the heating rate is 2° C. / min to remove organic impurities in the graphite slag;

[0055] (3) Get 4g treated graphite slag, 8gFe(NO 3 ) 3 9H 2 O and 5g melamine are mixed by ball milling, the ball milling rate is 450 revs / min, and the ball milling time is 2.5h to obtain a homogeneously mixed catalyst precursor;

[0056] (4) carbonizing the catalyst precursor at 1000°C for 1 hour at a heating rate of 3°C / min under an Ar atmosphere to obtain a carbon-based mixture containing iron and nit...

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Abstract

The invention belongs to the field of catalysts, and discloses a preparation method of an oxygen reduction catalyst using waste battery negative electrode graphite. The method comprises the followingsteps of: (1) recovering graphite slag from a waste battery, and carrying out heat treatment on the graphite slag; (2) ball-milling and mixing the treated graphite slag, a ferric salt and an nitrogen-containing organic matter to obtain a catalyst precursor; (3) carbonizing the catalyst precursor in an inert gas atmosphere to obtain a carbon-based mixture containing iron and nitrogen; and (4) dissolving the carbon-based mixture containing iron and nitrogen in an acid solution, performing filtering and drying, and performing carbonizing treatment again in an inert gas atmosphere to obtain the oxygen reduction catalyst utilizing the waste battery negative electrode graphite. According to the method, the graphite slag generated in the waste lithium ion battery recycling process is adopted as the raw material, the source is wide, the cost is low, environmental pollution can be reduced, and good economic benefits are achieved.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to an oxygen reduction catalyst utilizing negative electrode graphite of waste batteries and a preparation method thereof. Background technique [0002] With the transformation and development of social energy, the output of lithium-ion batteries is increasing day by day, and the waste lithium-ion batteries will gradually increase. The harmful impurities in waste lithium-ion batteries will pollute the environment. At the same time, there are many resources and materials with recycling value in waste lithium-ion batteries. Therefore, it is urgent to recycle and utilize waste lithium-ion batteries. [0003] At present, some studies on the recycling of waste lithium-ion battery cathode materials have been proposed, mainly using hydrometallurgy, pyrometallurgy and other methods to recover valuable metals, but anode materials also have great recycling value. Graphite has good struct...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10B01J35/02H01M4/90H01M10/54
CPCB01J27/24H01M10/54H01M4/9041H01M4/9083B01J35/40B01J35/617Y02E60/50Y02W30/84B01J23/745B01J21/18B01J37/08B01J37/0036H01M4/587H01M4/133H01M4/1393H01M4/663H01M4/8882H01M4/926H01M4/96
Inventor 邹柯阮丁山李长东王苑王凤梅吴琳
Owner GUANGDONG BRUNP RECYCLING TECH