A method for preparing mof-based nanomaterials based on leaching solution of waste lithium-ion batteries

A technology for lithium ion batteries and nanomaterials, which is applied in the field of preparing MOF-based nanomaterials based on the leachate of waste lithium ion batteries, can solve the problems that the purity does not meet the requirements of commercial applications, the separation and extraction of the leachate is difficult, the utilization rate of the leachate is low, etc. Low cost, good crystallinity and complete crystal form

Active Publication Date: 2022-03-15
北京理工大学前沿技术研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Due to the coexistence of various metal ions, it is difficult to separate and extract the leachate of waste lithium-ion batteries, and the process is long, the utilization rate of the leachate is low, the added value of the product is low, its purity cannot meet the requirements of commercial applications, and its shape is uncontrollable.
At present, MOF materials have shown good application prospects in lithium-ion batteries, supercapacitors, electrocatalysis, and adsorbents, but their large-scale application is limited due to the expensive raw materials required for their preparation.

Method used

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  • A method for preparing mof-based nanomaterials based on leaching solution of waste lithium-ion batteries
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  • A method for preparing mof-based nanomaterials based on leaching solution of waste lithium-ion batteries

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Embodiment 1

[0035] This embodiment provides a method for preparing MOF-based nanomaterials based on the leaching solution of waste lithium-ion batteries. The lithium-ion batteries are waste lithium cobalt oxide batteries. The method comprises the following steps:

[0036] (1) Mix the waste and old lithium-ion battery positive electrode material with the acetic acid solution of 2mol / L, add the H that the volume is 3% of acidic solution volume 2 o 2 , stirred at 70°C for 60min to obtain Li + ,Co 2+ A solution of metal ions; wherein, the solid-to-liquid ratio of the waste lithium-ion battery positive electrode material to the acidic solution is 30g / L, and the stirring speed is 400rpm.

[0037] (2) Control the concentration of cobalt ions to 0.75mol / L by evaporating the leaching solution; add an appropriate amount of ammonia water to adjust the pH of the leaching solution to 6; add ethanol so that the volume ratio of the leaching solution and ethanol is 0.5:1; The molar ratio of imidazole ...

Embodiment 2

[0041] This embodiment provides a method for preparing MOF-based nanomaterials based on the leaching solution of waste lithium-ion batteries. The lithium-ion batteries are waste lithium cobalt oxide batteries. The method comprises the following steps:

[0042] (1) Mix waste and old lithium-ion battery cathode material with 1mol / L nitric acid solution, add volume is 0.5% H of acidic solution volume 2 o 2 , stirred at 50°C for 30min to obtain Li + ,Co 2+A solution of metal ions; wherein, the solid-to-liquid ratio of the waste lithium-ion battery cathode material to the acidic solution is 50g / L, and the stirring speed is 300rpm.

[0043] (2) Control the concentration of cobalt ions to 0.5mol / L by evaporating the leaching solution; add an appropriate amount of ammonia water to adjust the pH of the leaching solution to 7; add ethanol so that the volume ratio of the leaching solution and ethanol is 3:1; The molar ratio of imidazole to cobalt ion concentration was 4:1, and 2-methy...

Embodiment 3

[0047] This embodiment provides a method for preparing MOF-based nanomaterials based on the leaching solution of waste lithium-ion batteries. The lithium-ion batteries are waste lithium cobalt oxide batteries. The method includes the following steps:

[0048] (1) Mix waste and old lithium-ion battery positive electrode material with 1.5mol / L lactic acid solution, add volume and be the H of 0.5% of acidic solution volume 2 o 2 , stirred at 60°C for 30min to obtain Li + ,Co 2+ A solution of metal ions; wherein, the solid-to-liquid ratio of the waste lithium-ion battery positive electrode material to the acidic solution is 20g / L, and the stirring speed is 400rpm.

[0049] (2) Control the concentration of cobalt ions to 0.25mol / L by evaporating the leaching solution; add an appropriate amount of ammonia water to adjust the pH of the leaching solution to 10; add ethanol so that the volume ratio of the leaching solution and ethanol is 1:1; The molar ratio of imidazole to cobalt i...

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Abstract

The present invention provides a method for preparing MOF-based nanomaterials based on the leaching solution of waste lithium ion batteries, the method comprising the following steps: (1) dissolving the positive electrode material of waste lithium ion batteries in an acidic reagent to obtain 2+ , Li + (2) disperse quantitative 2-methylimidazole in the leachate, and centrifuge to obtain MOF nanomaterials; (3) roast MOF nanomaterials to obtain MOF-based derivative nanomaterials. The method proposed by the present invention has cheap and easy-to-obtain raw materials, simple preparation steps, mild and easy-to-control reaction conditions, and the prepared product has regular morphology and high purity, has wide application prospects, and is of great significance to the high-value utilization of waste lithium-ion batteries .

Description

technical field [0001] The invention relates to the field of resource recycling technology and preparation of chemical materials, in particular to the field of a method for preparing MOF-based nanomaterials based on the leaching solution of waste lithium-ion batteries. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, small self-discharge, light pollution, and long cycle life. They are widely used in consumer electronics, new energy vehicles, and large-scale energy storage equipment, which leads to the consumption and disposal of lithium-ion batteries. The amount of lithium-ion batteries is increasing rapidly around the world, and after the service of lithium-ion batteries is over, its subsequent reasonable treatment is an urgent problem to be solved. Improper disposal of used lithium-ion batteries will result in a waste of resources and pose a greater threat to the environment and human health. Under such circumstances, the rec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54H01M10/0525B82Y30/00B82Y40/00
CPCH01M10/54H01M10/0525B82Y30/00B82Y40/00Y02W30/84Y02E60/10
Inventor 范二莎李丽陈人杰林娇吴锋
Owner 北京理工大学前沿技术研究院
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