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Treatment method of positive electrode active substance waste product of lithium ion secondary battery

A positive electrode active material and treatment method technology, applied in the direction of battery electrodes, solid waste removal, lithium oxide;/hydroxide, etc., can solve problems such as complex process, poor treatment efficiency, and increased treatment or equipment costs

Pending Publication Date: 2021-06-08
JX NIPPON MINING & METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, in the case of reclaiming lithium carbonate from the finally obtained lithium-containing solution by carbonation after various treatments such as acid leaching or solvent extraction as described above, the process until obtaining lithium carbonate is extremely complicated, so there are processing or equipment Increased cost and poor handling efficiency

Method used

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  • Treatment method of positive electrode active substance waste product of lithium ion secondary battery
  • Treatment method of positive electrode active substance waste product of lithium ion secondary battery
  • Treatment method of positive electrode active substance waste product of lithium ion secondary battery

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Experimental program
Comparison scheme
Effect test

Embodiment

[0105] Next, the above-mentioned treatment method of positive electrode active material waste was experimentally implemented and its effect was confirmed, so it will be described below. However, the description here is for the purpose of illustration only, and is not intended to be limited thereto.

[0106] The powder of the positive electrode active material containing cobalt, nickel, manganese, and lithium was mixed with varying ratios of graphite powder as carbon, and the mixture was fired at different temperatures over 2 hours. The calcined powder obtained after the calcining was added to water to dissolve lithium in the calcined powder in the water. The results of these are shown in image 3 and 4 .

[0107] according to image 3 It can be seen that the dissolution rate of lithium is greatly improved when more carbon is mixed than the positive electrode active material powder:carbon ratio of 9:1. In particular, when the mixing ratio of the positive electrode active m...

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Abstract

A method is for treating a lithium ion secondary battery positive electrode active substance waste product that contains cobalt, nickel, manganese and lithium, and involves: a carbon mixing step in which a powder-form positive electrode active substance waste product is mixed with carbon to obtain a mixture in which the ratio of the mass of the carbon is 10-30% of the total mass of the positive electrode active substance waste product and the carbon; a roasting step for roasting the mixture at a temperature of 600-800 DEG C to obtain a roasted powder; a lithium dissolving step which involves a first dissolving process for dissolving the lithium in the roasted powder in water or a lithium-containing solution and a second dissolving process for dissolving the lithium in the residue obtained in the first dissolving process in water; and an acid leaching step in which the residue obtained in the lithium dissolving step is leached with acid.

Description

technical field [0001] This specification discloses the technology of the method of processing the positive electrode active material waste containing cobalt, nickel, manganese, and lithium of a lithium ion secondary battery. Background technique [0002] In recent years, from the viewpoint of effective utilization of resources, extensive research has been conducted on the recovery of valuable metals such as nickel and cobalt contained in lithium-ion secondary battery waste, etc. . [0003] For example, in order to recover valuable metals from lithium-ion secondary battery waste, the lithium-ion secondary battery waste is usually roasted, then pulverized and screened in sequence, and then the powdered battery powder obtained under the screened screen is added to the The acid leaching solution is leached, so that lithium, nickel, cobalt, manganese, iron, copper, aluminum, etc. that can be contained therein are dissolved in the solution. [0004] And then, through multi-stag...

Claims

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Application Information

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IPC IPC(8): H01M10/54B09B5/00C01G53/00C22B3/04C22B3/06C22B5/10C22B7/00C22B23/00C22B26/12C22B47/00H01M4/505H01M4/525
CPCC22B3/44C22B3/08C22B5/10C22B23/00C22B26/12C22B47/00H01M4/505H01M4/525H01M10/54B09B5/00Y02W30/84Y02E60/10C22B7/005C22B3/3846C22B3/30C22B3/3844C22B3/3842C22B3/22C22B3/326C22B3/324B09B3/40C01D15/08C01D15/02C01G45/003C01G51/003C01G53/003H01M4/131H01M4/04Y02P10/20C22B3/10C22B7/00B09B3/00
Inventor 后田智也山田敬祐冈岛伸明
Owner JX NIPPON MINING & METALS CO LTD
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