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A method for recovering valuable metals in lithium-ion batteries

A lithium-ion battery and ion battery technology, applied in battery recycling, recycling technology, recycling by waste collectors, etc., can solve the problems of reducing recycling costs, inability to fully utilize battery raw material recycling operations, etc., and achieve rapid raw material acquisition and metal recycling High efficiency, simple and fast response

Active Publication Date: 2022-06-21
天齐锂业(江苏)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This document uses aluminothermic reduction to obtain cobalt oxide, manganese oxide, nickel oxide and lithium aluminate. The reaction environment is protected by an argon atmosphere, and the final product is a divalent metal oxide. In addition, this method still uses the positive electrode as the raw material. The negative electrode in the battery needs to be removed, and the battery raw materials cannot be fully utilized for recycling operations, reducing recycling costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Manually disassemble the nickel-cobalt-manganese ternary lithium-ion battery to remove the outer iron shell. Pulverize the inner core of the battery, remove the iron shell and diaphragm by magnetic separation and air separation, and sieve to obtain positive and negative electrode powder with a particle size of ≤2mm. Take 5kg of mixed powder and transfer it to the reaction furnace, and mix in magnesium powder and potassium chlorate as igniter. The magnesium powder was ignited, and the system began to self-propagate. After the reaction is stable, the oxygen-depleted gas N is introduced from the bottom of the reactor. 2 (5% oxygen content), 400 mL / min; slowly feed oxygen-enriched gas (100% oxygen volume fraction) into the reaction system from the top of the reaction furnace, 500 mL / min, for 3 min. Remove a small amount of slag in the upper part of the melt, and cool the lower liquid to obtain a metal mixture. The content of metal elements was determined by ICP (Inductiv...

Embodiment 2

[0053] Manually disassemble the nickel-cobalt-aluminum ternary lithium-ion battery to remove the outer iron shell. Pulverize the inner core of the battery, remove the iron shell and diaphragm by magnetic separation and air separation, and sieve to obtain positive and negative electrode powder with a particle size of ≤2mm. Take 8kg of mixed powder and transfer it to the reaction furnace, and mix in magnesium powder and potassium chlorate as igniter. The magnesium powder was ignited, and the system began to self-propagate. After the reaction was stabilized, oxygen-depleted gas Ar (99.9%) was introduced from the bottom of the reaction furnace, 300 mL / min; oxygen-enriched gas (95% oxygen volume fraction) was slowly introduced into the reaction system from the top of the reaction furnace, 400 mL / min, The time is 3 minutes. Remove a small amount of slag in the upper part of the melt, and cool the lower liquid to obtain a metal mixture. The content of metal elements was determined...

Embodiment 3

[0055] Manually disassemble the lithium cobalt oxide lithium ion battery to remove the outer iron shell. Pulverize the inner core of the battery, remove the iron shell and diaphragm by magnetic separation and air separation, and sieve to obtain positive and negative electrode powder with a particle size of ≤2mm. Take 10kg of the mixture powder and transfer it to the reaction furnace, and mix it with ethanol and potassium chlorate as igniters. The ethanol was ignited, and the system started a self-propagating reaction. After the reaction is stable, the oxygen-depleted gas CO is introduced from the bottom of the reactor 2 (10% oxygen content), 500 mL / min; slowly feed oxygen-enriched gas (95% oxygen volume fraction) into the reaction system from the top of the reaction furnace, 600 mL / min, for 3 min. Remove a small amount of slag in the upper part of the melt, and cool the lower liquid to obtain a metal mixture. The content of metal elements was determined by ICP (Inductively ...

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Abstract

The invention relates to a method for recovering valuable metals in lithium ion batteries, belonging to the technical field of battery recovery. The technical problem solved by the invention is to provide a low-cost method for recovering valuable metals in lithium ion batteries. The method includes the following steps: dismantling the lithium-ion battery, removing the shell, and crushing the inner core to obtain positive and negative electrode powders; adding an igniter to the positive and negative electrode powders, igniting and initiating a reaction, and injecting enriched oxygen after the reaction is stable After the reaction is completed, the upper slag body is removed, and the lower liquid is cooled to obtain a metal mixture. The method only needs to remove the battery shell and diaphragm, and the raw materials can be obtained quickly without separating the positive and negative electrode powders, and the raw materials in the lithium-ion battery are fully utilized for the reaction without adding a reducing agent and heat source, and the reaction is simple and fast. Moreover, the metal mixture obtained after the reaction has high purity, and the content of acid-insoluble impurities is lower than 1%.

Description

technical field [0001] The invention relates to a method for recovering valuable metals in lithium ion batteries, and belongs to the technical field of battery recovery. Background technique [0002] In recent years, with the rapid growth of the application of lithium-ion batteries in electric vehicles, 3C digital products and other fields, the overall production and market size of lithium-ion batteries in the world have rapidly increased. In 2015, the overall global production of lithium-ion batteries reached 100.75GWh, a year-on-year increase of 39.45%. From 2005 to 2015, the global lithium battery market has grown from $5.6 billion to $22.1 billion, with a compound annual growth rate of 14.7%; it is expected that the global lithium battery market will reach $36.3 billion in 2020 and will continue to maintain a high level. . [0003] Focusing on lithium iron phosphate and ternary lithium batteries, according to the calculation of the scrap period of lithium iron phosphat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B1/00C22B23/02C22B47/00C22B15/00C22B26/12C01D15/02H01M10/54
CPCC22B7/001C22B1/005C22B23/02C22B47/00C22B15/0052C22B26/12C22B7/007C22B23/0415C22B15/0067C01D15/02H01M10/54Y02W30/84
Inventor 胡曦肇巍赵莉周复李超徐川刘刚锋
Owner 天齐锂业(江苏)有限公司