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Method for peeling nickel-cobalt-manganese ternary lithium battery positive current collector based on supercutical fluid and reactor

A nickel-cobalt-manganese ternary lithium and supercritical fluid technology, which is applied in the field of waste battery recycling, can solve the problems of being unfriendly to the environment, cumbersome stripping methods, etc., and achieve the effects of good stripping effect, low cost and environmental protection in the process.

Active Publication Date: 2018-08-03
JIANGSU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the cumbersome and unfriendly defects of the current collector stripping method of the positive electrode of the nickel-cobalt-manganese ternary lithium battery existing in the prior art, the present invention provides a method for stripping the positive electrode collector of the nickel-cobalt-manganese ternary lithium battery based on supercritical fluid and reactor

Method used

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  • Method for peeling nickel-cobalt-manganese ternary lithium battery positive current collector based on supercutical fluid and reactor
  • Method for peeling nickel-cobalt-manganese ternary lithium battery positive current collector based on supercutical fluid and reactor

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Effect test

Embodiment 1

[0018] After fully discharging the 333-type nickel-cobalt-manganese ternary lithium battery, manually disassemble the battery, sort out the positive electrode material, and break it to 4cm 2 After the size, put it in the reaction kettle of the reactor, add an appropriate amount of water according to the solid-to-liquid ratio of 2%, and control the mechanical stirring speed to be 300rpm, then put the supercritical fluid into the reaction kettle through a high-pressure pump to control the speed of the stripping process. The temperature is 50°C, the stripping pressure is 10MPa, and the stripping time is 60min to dissolve the organic components in the positive electrode material of the nickel-cobalt-manganese ternary lithium-ion battery, and strip the positive electrode current collector. The mass fraction of the positive current collector in the positive electrode material was measured by the alkali dissolution method, and the stripping rate was calculated to be 92.42% according t...

Embodiment 2

[0020] After fully discharging the 424-type nickel-cobalt-manganese ternary lithium battery, manually disassemble the battery, sort out the positive electrode material, and crush it to 8cm 2 After the size, put it into the reactor of the reactor, add an appropriate amount of ethanol according to the solid-to-liquid ratio of 4%, and control the mechanical stirring speed to be 400rpm, then put the supercritical fluid into the reactor by a high-pressure pump to control the speed of the stripping process. The temperature is 55°C, the peeling pressure is 11MPa, and the peeling time is 75min, to dissolve the organic components in the positive electrode material of the nickel-cobalt-manganese ternary lithium-ion battery, and peel off the positive electrode current collector. The mass fraction of the positive current collector in the positive electrode material was measured by the alkali solution method, and the stripping rate was calculated to be 93.36% according to the mass change of...

Embodiment 3

[0022] After fully discharging the 811-type nickel-cobalt-manganese ternary lithium battery, manually disassemble the battery, sort out the positive electrode material, and crush it to 10cm 2 After the size, put it in the reaction kettle of the reactor, add an appropriate amount of acetone according to the solid-to-liquid ratio of 5%, and control the mechanical stirring speed to 500rpm, then put the supercritical fluid into the reaction kettle through a high-pressure pump to control the speed of the stripping process. The temperature is 60°C, the peeling pressure is 12MPa, and the peeling time is 90min, to dissolve the organic components in the positive electrode material of the nickel-cobalt-manganese ternary lithium-ion battery, and peel off the positive electrode current collector. The mass fraction of the positive current collector in the positive electrode material was measured by the alkali dissolution method, and the stripping rate was calculated to be 93.99% according t...

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Abstract

The invention relates to a method for peeling a nickel-cobalt-manganese ternary lithium battery positive current collector based on supercutical fluid and a reactor. The method comprises the followingsteps: placing a nickel-cobalt-manganese ternary lithium battery positive electrode material in a reaction vessel, adding a solvent for completely immersing the nickel-cobalt-manganese ternary lithium battery positive electrode material, performing mechanical stirring, and employing the supercutical fluid for dissolving and peeling an organic component in the negative electrode material under certain temperature and pressure. According to the invention, the organic solvent and alkali lye are not used for peeling the negative current collector, the method has the advantages of good peeling effect, simple process, low cost, and environmental protection process, the peeling rate of the positive current collector is more than 90%, no secondary pollution is not generated, and the method is a green environmental-protection treatment process. The peeled negative electrode material can be directly recovered, and the negative active substance can be recycled after leaching.

Description

technical field [0001] The invention belongs to the technical field of recycling waste batteries, and in particular relates to a supercritical fluid-based method for stripping a positive current collector of a nickel-cobalt-manganese ternary lithium battery and a reactor. Background technique [0002] Nickel-cobalt-manganese ternary lithium-ion batteries are widely used in many fields such as digital products, aerospace, and new energy vehicles due to their high working voltage, high specific capacity, long cycle life, and good safety performance. The positive electrode material of nickel-cobalt-manganese ternary lithium-ion battery is LiNi 1-x-y co x mn y o 2 The mixture of active material, conductive agent and binder is spread on the aluminum foil current collector, among which metal elements such as cobalt, nickel and lithium have high recovery value. [0003] In the existing methods for recovering positive electrode materials of nickel-cobalt-manganese ternary lithiu...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCH01M10/54Y02W30/84
Inventor 刘维桥邹超刘玉刘欢潘君丽周全法
Owner JIANGSU UNIVERSITY OF TECHNOLOGY
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