Method for preparing ternary positive electrode material precursor by virtue of waste batteries

A technology for positive electrode materials and waste batteries, which is applied in the field of preparing ternary positive electrode material precursors by using waste batteries, can solve the problems of lack of effective methods for ternary positive electrode material precursors, complicated metallurgical chemical methods, and high extraction costs, so as to protect the environment. and sustainable development, improving resource utilization, and reducing production costs

Active Publication Date: 2015-05-27
广东芳源新材料集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metallurgical chemical methods are complex in process, high in extraction costs, and very uneconomical. Therefor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Follow the steps below to prepare a ternary cathode material precursor using waste batteries:

[0040] (1) Disassemble the waste nickel-metal hydride battery, remove the packaging and the negative electrode of the battery, and obtain the positive electrode material of the waste battery;

[0041] (2) Roast the positive electrode material of waste batteries at 900°C to remove the organic substances in the positive electrode material;

[0042] (3) Dissolve the roasted waste battery positive electrode material with 4mol / L sulfuric acid to obtain a waste battery positive electrode material solution. The solution is mainly nickel sulfate and cobalt sulfate, and contains other metal impurities. The total content of nickel and cobalt reaches 3.5 N, use the oxidation precipitation method to remove iron impurities in the solution, so that the iron content is less than or equal to 10ppm;

[0043] (4) Use the P204 extraction method to remove manganese, copper, calcium, and zinc im...

Embodiment 2

[0050] Follow the steps below to prepare a ternary cathode material precursor using waste batteries:

[0051] (1) Disassemble the waste lithium-ion battery, remove the packaging and the negative electrode of the battery, and obtain the positive electrode material of the waste battery;

[0052] (2) Roast the positive electrode material of waste batteries at 800°C to remove the organic substances in the positive electrode material;

[0053] (3) Dissolve the roasted waste battery cathode material with 6mol / L sulfuric acid to obtain a waste battery cathode material solution. The solution is mainly nickel sulfate and cobalt sulfate, and contains other metal impurities. The total content of nickel and cobalt reaches 3N , use the oxidation precipitation method to remove iron impurities in the solution, so that the iron content is less than or equal to 10ppm;

[0054] (4) Use the P204 extraction method to remove manganese, copper, calcium, and zinc impurities in the positive electrod...

Embodiment 3

[0061] Follow the steps below to prepare a ternary cathode material precursor using waste batteries:

[0062] (1) Disassemble the waste nickel-cadmium battery and waste lithium-ion battery, remove the packaging and battery negative electrode, and obtain the waste battery positive electrode material;

[0063] (2) Roast the positive electrode material of waste batteries at 1000°C to remove the organic substances in the positive electrode material;

[0064] (3) Dissolve the roasted waste battery positive electrode material with 8mol / L sulfuric acid to obtain a waste battery positive electrode material solution. The solution is mainly nickel sulfate and cobalt sulfate, and contains other metal impurities. The total content of nickel and cobalt reaches 4N , use the oxidation precipitation method to remove iron impurities in the solution, so that the iron content is less than or equal to 10ppm;

[0065] (4) Use the P204 extraction method to remove manganese, copper, calcium, and zi...

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Abstract

The invention discloses a method for preparing a ternary positive electrode material precursor by virtue of waste batteries. The method comprises the steps of detaching waste batteries, roasting the detached waste batteries and carrying out sulfuric acid dissolving to obtain a waste battery positive electrode material, then separating and removing metal impurities in the waste battery positive electrode material by virtue of an extraction method to obtain a sulfate solution, supplementing manganese or aluminum to prepare a mixed solution for preparing the ternary positive electrode material precursor, then sequentially adding ammonia water and a sodium hydroxide solution, reacting to generate ternary positive electrode material precursor precipitates, and finally washing and drying to obtain the ternary positive electrode material precursor. According to the method, the cyclic utilization of resources of nickel and cobalt in waste batteries is realized, and the environmental pollution caused by heavy metals is avoided; furthermore, a nickel-cobalt-aluminum precursor and a nickel-cobalt-manganese precursor are produced from the recycled waste batteries, so that the requirements on primary mineral resources are lowered, and the purchase costs of nickel and cobalt are lowered; the method adopts a simple technological process and is applicable to industrial large-scale production.

Description

technical field [0001] The invention relates to a method for preparing a precursor of a ternary positive electrode material, in particular to a method for preparing a precursor of a ternary positive electrode material by using waste batteries. Background technique [0002] The recycling and resource utilization of waste batteries is not only the need for environmental protection and the development of the international battery market, but also an inevitable choice to alleviate the shortage of strategic metal resources in my country and promote the sustainable development of my country's battery industry. Waste secondary batteries contain varying amounts of heavy metals or rare precious metal elements (for example, ordinary lithium-ion batteries contain 20% cobalt, 10% copper, 4.7% aluminum, 2.5% iron, and 0.1% lithium, etc.; nickel-hydrogen batteries contain 30% nickel , 4% cobalt and about 10% light rare earth metals), while China’s cobalt, copper, and nickel resources are ...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M6/52
CPCY02W30/84
Inventor 罗爱平吴芳
Owner 广东芳源新材料集团股份有限公司
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