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Method for recovering and regenerating positive electrode material of lithium ion battery

A technology for lithium-ion batteries and positive electrode materials, which is applied in the field of recycling and regenerating lithium-ion battery positive electrode materials, can solve the problems of secondary environmental pollution, long processing cycle, and low energy consumption, and achieve short processing cycles, improve overall performance, and reduce energy consumption. low effect

Active Publication Date: 2012-03-21
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the disadvantages of high energy consumption, long processing cycle and secondary pollution to the environment in the recycling and reuse of useful metals in waste lithium-ion batteries in the prior art, the purpose of the present invention is to provide a positive electrode material for recycled and regenerated lithium-ion batteries The method, specifically, relates to a method of utilizing waste lithium ion batteries to separate and recover cobalt and lithium therein, and regenerate the cobalt and lithium into new lithium cobalt oxide electrode materials, and the method can regenerate the cobalt and lithium from waste lithium The cobalt and lithium separated and recovered in the ion battery are directly deposited on the nickel substrate by electrochemical deposition to obtain a regenerated lithium cobalt oxide electrode material, which can be directly used as a positive electrode material for a lithium ion battery. The method has low energy consumption, simple preparation process, short treatment cycle, obvious effect, and will not cause secondary pollution to the environment

Method used

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  • Method for recovering and regenerating positive electrode material of lithium ion battery
  • Method for recovering and regenerating positive electrode material of lithium ion battery
  • Method for recovering and regenerating positive electrode material of lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1) Discharge the waste lithium-ion battery deeply with Land, then decompose it, separate the positive and negative electrode materials, remove the electrolyte and diaphragm, separate the copper (Cu) foil from the negative electrode, remove the binder and recycle Copper foil; the aluminum (Al) foil with lithium cobaltate in the positive electrode material is cut into strips and then ultrasonically treated with NMP, filtered, and the binder is removed. The above process is carried out in a fume hood to obtain aluminum foil and conductive agent. and the precipitation of lithium cobaltate, and recover the aluminum foil; after drying the precipitate for 12 hours, burn it in a muffle furnace at 600°C for 3 hours to remove the conductive agent therein, and obtain a black solid powder containing lithium cobaltate.

[0027] (2) Weigh 5g of the black solid powder obtained in step (1), put it into a 100ml there-necked bottle, then add 50ml of 2mol / L hydrochloric acid and 10ml of 4...

Embodiment 2

[0032](1) Discharge the waste lithium-ion battery deeply with land, then decompose it, separate the positive and negative materials, remove the electrolyte and diaphragm, separate the copper foil from the negative electrode, and recover the copper foil after removing the binder; The aluminum foil sheet with lithium cobaltate is cut into strips and treated with NMP ultrasonically, filtered, and the binder is removed. The above process is carried out in a fume hood to obtain aluminum foil and a precipitate containing conductive agent and lithium cobaltate, and recycle the aluminum foil; After the precipitate was dried for 12 hours, it was fired in a muffle furnace at 600° C. for 3 hours to remove the conductive agent therein to obtain a black solid powder containing lithium cobaltate.

[0033] (2) Weigh 5g of the black solid powder obtained in step (1), put it into a 100ml there-necked bottle, then add 50ml of 2mol / L hydrochloric acid and 10ml of 40% peracetic acid, stir at 80°C ...

Embodiment 3

[0038] (1) Discharge the waste lithium-ion battery deeply with land, then decompose it, separate the positive and negative materials, remove the electrolyte and diaphragm, separate the copper foil from the negative electrode, and recover the copper foil after removing the binder; The aluminum foil sheet with lithium cobaltate is cut into strips and treated with NMP ultrasonically, filtered, and the binder is removed. The above process is carried out in a fume hood to obtain aluminum foil and a precipitate containing conductive agent and lithium cobaltate, and recycle the aluminum foil; After the precipitate was dried for 12 hours, it was burned in a muffle furnace at 700° C. for 4 hours to remove the conductive agent therein to obtain a black solid powder containing lithium cobaltate.

[0039] (2) Weigh 5g of the black solid powder obtained in step (1), put it into a 100ml there-necked bottle, then add 50ml of 2mol / L hydrochloric acid and 10ml of 40% peracetic acid, stir at 80°...

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Abstract

The invention relates to a method for recovering and regenerating a positive electrode material of a lithium ion battery and belongs to the technical field of recovery and circulating reuse of an electrode material. The method comprises the following steps: successively carrying out discharge, decomposition, an NMP (N-methyl-2-pyrrolidone) ultrasonic treatment and dissolution, filtration and firing on a waste lithium ion battery to obtain black solid powder; carrying out acid leaching on the black solid powder, and filtering to obtain a leachate solution containing Co<2+> and Li<1+>; and mixing the leachate solution with a LiOH solution to obtain electrolyte, stirring and reacting for 3-18 hours by using an electrochemical deposition technology at the constant current density of 5.0-9.0mA / cm<2> and the temperature of 30-90 DEG C, and directly synthesizing on a nickel substrate to obtain the regenerated lithium cobalt oxide positive electrode material, namely a regenerated positive electrode material of the lithium ion battery. By using the method, the recovery and regeneration of the lithium cobalt oxide positive electrode material of the waste lithium ion battery are realized; and the method has the advantages of low energy consumption, simple preparation process, short treatment period, obvious effect and no secondary environment pollution.

Description

technical field [0001] The invention relates to a method for reclaiming and regenerating the positive electrode material of a lithium-ion battery, in particular to a method for separating and reclaiming cobalt and lithium in a waste lithium-ion battery, and regenerating the cobalt and lithium into a new lithium cobaltate electrode The material method belongs to the technical field of recovery and recycling of electrode materials. Background technique [0002] In recent years, with the rapid development of mobile communications and the popularization of notebook computers, lithium-ion batteries have rapidly replaced Nickel-cadmium and nickel-metal hydride batteries have become the most popular high-energy batteries, and have been widely used in mobile phones, cameras, and notebook computers. At the same time, lithium-ion batteries are developing in the direction of high performance, multiple models, low cost and high safety. As a replacement product for power supplies, micr...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B3/10C25B1/00H01M10/54C22B23/00C22B26/12
CPCY02P10/20Y02W30/84
Inventor 李丽吴锋陈人杰刘剑锐谢嫚赵桃林张笑笑
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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