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A method for extracting and separating components and active materials of electrolyte from battery

An active material and electrolyte technology, which is applied in the field of solid waste recycling and reuse, can solve the problems of high energy consumption, loss, and complicated vacuum distillation method, and achieve the effect of simple operation and low pollution.

Active Publication Date: 2019-10-11
宁波赛克雷特新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these three methods still have great limitations in large-scale industrial applications, such as the decomposition of lithium hexafluorophosphate in the lye method, the complicated process and high energy consumption of the vacuum distillation method itself, and the use of organic solvent extraction strips in the extraction method. loss and generation of new pollution

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  • A method for extracting and separating components and active materials of electrolyte from battery

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Lithium-ion battery extraction and separation

[0037] Extractant and co-solvent: carbon dioxide (CO 2 ), acetonitrile (C 2 h 3 N)

[0038] Equipment: refrigerated room, supercritical extraction equipment, heating chamber, ultrasonic equipment

[0039] Specific extraction and separation methods:

[0040] (1) Refrigeration: Store at -25°C for 10 hours to completely condense the electrolyte in the battery;

[0041] (2) Supercritical extraction: Take out the frozen battery, peel off the battery case, put the exposed part into the supercritical equipment, and use carbon dioxide as the extraction agent under the conditions of temperature 60°C and air pressure 150bar, and the flow rate is controlled at 30± 5L / min, acetonitrile is the co-solvent, the flow rate is controlled at 25mL / min, through the shelled battery, this process is maintained for 30 minutes, the liquid flow rate is controlled, the electrolyte is completely dissolved in the co-solution of carbon ...

Embodiment 2

[0044] Embodiment 2: Extraction and separation of lithium ion battery

[0045] Extractant and co-solvent: carbon dioxide (CO 2 ), acetonitrile (C 2 h 3 N)

[0046] Equipment: refrigerated room, supercritical extraction equipment, heating chamber, ultrasonic equipment

[0047] Specific extraction and separation methods:

[0048] (1) Refrigeration: Store at -10°C for 10 hours to completely condense the electrolyte in the battery;

[0049] (2) Supercritical extraction: Take out the frozen battery, peel off the battery case, put the exposed part into the supercritical equipment, and use carbon dioxide as the extraction agent under the conditions of temperature 60°C and air pressure 150bar, and the flow rate is controlled at 18± 0.5L / min, acetonitrile is the co-solvent, the flow rate is controlled at 10mL / min, through the shelled battery, this process is maintained for 20 minutes, the liquid flow rate is controlled, the electrolyte is completely dissolved in the co-solution of...

Embodiment 3

[0052] Embodiment 3: Extraction and separation of lithium ion battery

[0053] Extractant and co-solvent: carbon dioxide (CO 2 ), acetonitrile (C 2 h 3 N)

[0054] Equipment: refrigerated room, supercritical extraction equipment, heating chamber, ultrasonic equipment

[0055] Specific extraction and separation methods:

[0056] (1) Refrigeration: Store at -10°C for 24 hours to completely condense the electrolyte in the battery;

[0057] (2) Supercritical extraction: Take out the frozen battery, peel off the battery case, put the exposed part into the supercritical equipment, and use carbon dioxide as the extraction agent under the conditions of temperature 55°C and air pressure 180bar, and the flow rate is controlled at 30± 0.5L / min, acetonitrile is the co-solvent, the flow rate is controlled at 20mL / min, through the shelled battery, this process is maintained for 25 minutes, the liquid flow rate is controlled, the electrolyte is completely dissolved in the co-solution of...

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Abstract

The invention provides a method for extracting various components of an electrolyte and active materials through supercritical extraction. A supercritical device is used for extracting main electrolyte components in a battery employing carbon dioxide as an extraction liquid and acetonitrile as a cosolvent; other components are subjected to ultrasonic oscillation and extracted through a supercritical carbon dioxide device; and then active materials in an electrode are striped, thereby recycling the active components and the electrolyte in the battery at the maximum efficiency.

Description

technical field [0001] The invention relates to the field of recovery and reuse of solid waste, in particular to a method for extracting and separating components of electrolyte and active materials from batteries. Background technique [0002] Energy plays an indispensable role in human life in the 21st century. Fossil energy has brought about endless problems in today's society, such as low combustion efficiency, over-exploitation and serious environmental pollution. Therefore, in recent years, more and more alternative energy sources have been researched and developed, such as wind energy and solar energy. However, the use and storage of such clean energy has greatly increased the requirements for the efficiency and energy storage of energy storage devices. Among various energy storage devices, batteries have attracted extensive attention due to their high cycle efficiency. In particular, the development of new energy vehicles has greatly promoted the development of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
Inventor 胡华胜王军其他发明人请求不公开姓名
Owner 宁波赛克雷特新能源科技有限公司