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Method for processing positive electrode material of waste lithium nickel-cobalt-manganese oxide ion battery

A technology for nickel-cobalt manganate lithium and ion batteries, which is applied in the field of processing cathode materials of waste nickel-cobalt manganate lithium-ion batteries, can solve the problems of high equipment requirements, environmental pollution, etc., and achieves low equipment requirements, good separation effect, The effect of high recycling rate

Active Publication Date: 2019-03-29
余姚市海泰贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a treatment method for waste nickel-cobalt-manganese oxide lithium-ion battery positive electrode materials to solve the problems of environmental pollution and high equipment requirements in the prior art of inorganic acid leaching metal ions

Method used

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  • Method for processing positive electrode material of waste lithium nickel-cobalt-manganese oxide ion battery
  • Method for processing positive electrode material of waste lithium nickel-cobalt-manganese oxide ion battery
  • Method for processing positive electrode material of waste lithium nickel-cobalt-manganese oxide ion battery

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Experimental program
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Effect test

Embodiment 1

[0045] (1) Pretreatment

[0046] Put the waste nickel-cobalt-manganese oxide lithium-ion battery into saturated brine for 8 minutes of discharge treatment, bake the discharged battery at 60°C for 8 hours for drying, and separate the positive electrode sheet. The positive electrode sheet is dissolved in 1-methyl-2-pyrrolidone, and the current collector in the positive electrode sheet is removed to obtain the positive electrode active material.

[0047] (2) Calcination and grinding

[0048]The positive electrode active material obtained in step (1) was sintered at 600° C. for 5 hours, and then the calcined sample was ground to obtain a black powder.

[0049] (3) Preparation of leaching solution

[0050] The black powder obtained in step (2) and formic acid are formulated into a solution with a concentration of 60g / L, wherein the concentration of formic acid is a volume fraction of 0.6mol / L, and then adding a volume fraction of 12% H 2 o 2 , reacted at 50° C. for 2 hours to o...

Embodiment 2

[0058] (1) Pretreatment

[0059] Put the waste nickel-cobalt-manganese oxide lithium-ion battery into saturated brine for 15 minutes of discharge treatment, bake the discharged battery at 50°C for 6 hours to dry, and separate the positive electrode sheet. The positive electrode sheet is dissolved in 1-methyl-2-pyrrolidone, and the current collector in the positive electrode sheet is removed to obtain the positive electrode active material.

[0060] (2) Calcination and grinding

[0061] The positive electrode active material obtained in step (1) was sintered at 750° C. for 6 hours, and then the calcined sample was ground to obtain a black powder.

[0062] (3) Preparation of leaching solution

[0063] The black powder obtained in step (2) and formic acid were prepared into a solution with a concentration of 80 g / L, wherein the concentration of formic acid was 0.8 mol / L by volume, and reacted at 60° C. for 6 hours to obtain a mixed solution. The mixture is filtered to obtain a...

Embodiment 3

[0072] (1) Pretreatment

[0073] Put the waste nickel-cobalt-manganese oxide lithium-ion battery into saturated brine for 30 minutes of discharge treatment, bake the discharged battery at 80°C for 10 hours for drying, and separate the positive electrode sheet. The positive electrode sheet is dissolved in 1-methyl-2-pyrrolidone, and the current collector in the positive electrode sheet is removed to obtain the positive electrode active material.

[0074] (2) Calcination and grinding

[0075] The positive electrode active material obtained in step (1) was sintered at 900° C. for 8 hours, and then the calcined sample was ground to obtain a black powder.

[0076] (3) Preparation of leaching solution

[0077] The black powder obtained in step (2) and formic acid were prepared into a solution with a concentration of 120 g / L, wherein the concentration of formic acid was 1.2 mol / L by volume fraction, and reacted at 70° C. for 8 hours. After the reaction, the mixed solution is filte...

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Abstract

The invention provides a method for processing a positive electrode material of a waste lithium nickel-cobalt-manganese oxide ion battery. The method comprises: preprocessing a waste lithium nickel-cobalt-manganese oxide ion battery to obtain a positive active material; carrying out calcining and grinding on the active material to obtain black powder; processing the black powder and formic acid toprepare a solution with the concentration of 60 to120 g / L, and then carrying out heating, filtering, and washing on the solution to obtain a leachate; adding ammonia water and NaOH into the leachate,and then carrying out stirring, vacuum filtration, washing and drying to obtain Ni0.5Co0.2Mn0.3(OH)2; dispersing the Ni0.5Co0.2Mn0.3(OH)2 and LiCo3 uniformly in coating liquid, and then carrying outball-milling and calcining to obtain a ternary positive electrode material. With the method provided by the invention, recycling and utilization of all metal elements of the ternary positive electrodematerial in the waste battery are realized; and the recovery rate of the nickel cobalt manganese metal ion is over 95%.

Description

technical field [0001] The invention relates to the field of waste lithium ion battery treatment, in particular to a treatment method for waste nickel cobalt manganese oxide lithium ion battery cathode material. Background technique [0002] Lithium-ion batteries have been widely used in electronic information products since they were commercialized in 1992. Such as mobile power for cameras, mobile phones, laptops, etc. With the advancement of science and technology, lithium-ion batteries are gradually developing into new energy vehicles, and their market share is increasing year by year. Lithium-ion batteries are gradually replacing nickel-cadmium batteries and nickel-metal hydride batteries due to their unique advantages such as high energy density, high voltage, good cycle performance, small self-discharge, safe operation, and environmental friendliness. At present, the cathode materials of lithium-ion batteries mainly include LiMO 2 (LiCoO 2 , LiNiO 2 、LiNi 1 / 3 co ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54C22B7/00C22B23/00C22B47/00
CPCC22B7/008C22B23/0446C22B47/00H01M10/54Y02W30/84Y02P10/20
Inventor 徐谦哲詹孝军梁凯陈小平
Owner 余姚市海泰贸易有限公司