Stripping method for cathode material and current collector of waste ternary power lithium battery

A positive electrode material and meta-power technology, applied in the field of resource regeneration, to achieve the effects of easy industrialization and automatic operation, low operating cost, and simple operation

Inactive Publication Date: 2019-03-15
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the separation problem of the positive electrode material and the current collector of

Method used

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  • Stripping method for cathode material and current collector of waste ternary power lithium battery
  • Stripping method for cathode material and current collector of waste ternary power lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Cut the fully discharged ternary power battery by cold cutting, collect battery poles, shells, etc. for recycling, and manually separate the positive and negative electrodes and plastic diaphragms from the removed batteries;

[0058] (2) Cut the positive electrode sheet into a strip shape of 69mm×45mm (1 / 4 of the electrode sheet), put it in an oven, raise the temperature to 450°C at a rate of 3°C / min, keep it warm for 1.5 hours, and cool it down to room temperature naturally. Shaking the positive electrode sheet, the positive electrode material on the current collector hardly fell off.

[0059] (3) Put the insulated positive electrode sheet into deionized water at room temperature for 10 seconds with an ultrasonic cleaning frequency of 60KHz and a power of 1.5Kw, and the positive electrode material will completely fall off from the aluminum foil of the current collector.

[0060] (4) The positive electrode material is suction-filtered and then dried in a blast oven ...

Embodiment 2

[0063] (1) Cut the fully discharged ternary power battery by cold cutting, collect battery poles, shells, etc. for recycling, and manually separate the positive and negative electrodes and plastic diaphragms from the removed cells;

[0064] (2) Cut the positive electrode sheet into a rectangle of 90mm×46mm (1 / 3 of the electrode sheet), put it in an oven, raise the temperature to 500°C at a rate of 4°C / min, keep it warm for 2 hours, cool it down to room temperature naturally, and shake the positive electrode There is a very small amount of powder shedding from the positive electrode material on the current collector, which can basically be ignored.

[0065] (3) Put the insulated positive electrode sheet into deionized water at room temperature and ultrasonically clean it at a frequency of 60KHz and a power of 1.5Kw for 20 seconds, and the positive electrode material will completely fall off from the aluminum foil of the current collector.

[0066] (4) The positive electrode mat...

Embodiment 3

[0069] (1) Cut the fully discharged ternary power battery by cold cutting, collect battery poles, shells, etc. for recycling, and manually separate the positive and negative electrodes and plastic diaphragms from the removed cells;

[0070] (2) Put the positive electrode sheet 138mm×90mm (complete electrode sheet) into the oven, raise the temperature to 550°C at a rate of 5°C / min, keep it warm for 2.5 hours, cool down to room temperature naturally, shake the positive electrode sheet, and the positive electrode material will be released from the current collector There is a small amount of powder falling off, and the average quality of the material that falls off from each pole piece accounts for 5.25% of the quality of the material collected by ultrasound.

[0071] (3) Put the insulated positive electrode sheet into deionized water at room temperature and ultrasonically clean it at a frequency of 60KHz and a power of 1.5Kw for 30 seconds, and the positive electrode material wil...

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Abstract

The invention discloses a stripping method for a cathode material and a current collector of a waste ternary power lithium battery and belongs to the technical field of resource regeneration. The method comprises the steps of safety pretreatment, stripping of a battery housing, heat preservation, ultrasonic treatment and subsequent steps. According to the stripping method, a battery cathode pole piece is placed at a suitable temperature and thermally insulated for a certain period of time based on the thermal decomposition temperature of a cathode material binder so that the compacted binder is thermally decomposed, and then the cathode material and the current collector are efficiently and completely separated through ultrasonic treatment. The separated current collector is smooth in surface, no cathode material is remained, the current collector can be reused as a raw material for aluminum production, and the dried cathode material can be recycled and regenerated through a subsequenttreatment process.

Description

technical field [0001] The invention relates to a high-efficiency separation method for a positive electrode material and a current collector of a positive pole piece of a waste ternary power lithium battery, which is an important processing step in the recycling process of waste batteries and belongs to the technical field of resource regeneration. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high voltage, long life, low self-discharge rate, no memory effect, good cycle performance and wide temperature range. The main power source for electronic equipment. According to statistics, the global production of lithium-ion batteries exceeded 580 million in 2000, and the domestic production was about 100 million. In 2003, the global production reached 1.255 billion. In 2008, the output reached 2.71 billion. In 2010, the global production exceeded 3 billion. . With the increasingly mature manufacturing technology of lithium-ion b...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCH01M10/54Y02W30/84
Inventor 赵煜娟肖湘韩颖倩徐涛李婧霞
Owner BEIJING UNIV OF TECH
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