Green peeling method for electrode material of waste lithium ion power battery

A power battery and electrode material technology, which is applied in the field of green stripping of waste lithium-ion power battery electrode materials, can solve the problem of lithium battery electrolyte treatment technology and component separation immaturity, the complexity and cost increase of positive electrode material recovery process, and the environment The health hazards of operating workers and other problems are achieved, and the effect of convenient operation, low cost and less usage is achieved

Active Publication Date: 2018-10-16
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrolyte treatment technology and component separation of lithium batteries are not mature.
During the dismantling and separation of lithium batteries, the electrolyte decomposes and volatilizes, causing great harm to the environment and the health of operators.
In addition, a large amount of impurities will be mixed in the positive electrode material obtained through the current crushing and separation technology, which greatly increases the complexity and cost of the positive electrode material recovery process

Method used

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  • Green peeling method for electrode material of waste lithium ion power battery
  • Green peeling method for electrode material of waste lithium ion power battery
  • Green peeling method for electrode material of waste lithium ion power battery

Examples

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Embodiment 1

[0024] The present invention specifically comprises the following steps:

[0025] according to figure 1 Flow chart, after the waste lithium-ion battery pack is discharged as a whole, it is disassembled to obtain battery cells, metal casings, wires, pipelines and circuit boards. After the dismantled battery cells were cut into strips, they were transferred to immerse in a negative electrode stripper with a concentration of 0.1 mol / L, and stayed for 2 minutes. After sieving, the undersieves were collected and dried to obtain graphite. The oversize material was immersed in the positive electrode material with a concentration of 2 mol / L, stayed for 15 minutes, and was sieved to obtain the undersize material, which was collected and dried as the positive electrode material. After drying the sieved material after the second sieving, after sorting, the diaphragm, shell and copper / aluminum are separated to obtain the product. When the concentration of organic matter in the leaching ...

Embodiment 2

[0027] The present invention specifically comprises the following steps:

[0028] according to figure 1 Flow chart, after the waste lithium-ion battery pack is discharged as a whole, it is disassembled to obtain battery cells, metal casings, wires, pipelines and circuit boards. After the dismantled battery cells were cut into strips, they were transferred and immersed in a negative electrode stripping agent with a concentration of 0.2 mol / L, and stayed for 2 minutes. After sieving, the undersize was obtained, which was graphite after drying. The oversize material was immersed in a positive electrode stripper with a concentration of 1.0 mol / L, and stayed for 20 minutes. After sieving, the undersize material was collected and dried to obtain the positive electrode material. After the oversize is dried, it is sorted to separate the diaphragm, casing and copper / aluminum to obtain the product. When the concentration of organic matter in the leaching solution reaches 20wt.%, it is...

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Abstract

The invention provides an overall peeling method for a cathode material and an anode material based on the characteristics of compact structure, complicated composition, harmful electrolyte containingand the like of a waste lithium ion battery, wherein aluminum foil is effectively separated from the cathode material in controllable conditions, and then cathode graphite is effectively separated from copper coil while the electrolyte is effectively recycle; the whole technology does not apply corrosive solutions such as strong base, strong acid and strong oxidant, the peeling process is fast and efficient, the composite solvent is low in cost, all sub-systems are linked with each other, thus the method is a green and environment-friendly method for circularly utilizing a waste lithium ion power battery.

Description

technical field [0001] The invention relates to a recovery method for positive and negative materials of waste lithium-ion power batteries, which belongs to the new technology of solid waste treatment in the field of environmental protection and resource comprehensive utilization, and is suitable for the classification and separation of different components of lithium-ion power batteries and the separation of electrolytes Clean recycling. Background technique [0002] Lithium-ion batteries are widely used in many fields such as energy storage, electric vehicles, and portable electronic devices. Energy storage systems and electric vehicles are considered to have great potential to reduce fossil energy consumption and increase the utilization rate of renewable energy, so they have received strong support from the state in recent years. In addition, with the improvement of living standards, the demand for mobile electronic devices such as mobile phones and notebook computers i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54B09B3/00
CPCH01M10/54B09B3/00Y02W30/84
Inventor 张付申贺凯
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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