A kind of nickel-cobalt-manganese waste ternary lithium battery cathode material recycling method

A ternary lithium battery, cathode material technology, applied in battery recycling, recycling technology, battery electrodes and other directions, can solve the problems of low electrochemical performance of recycled products, toxic organic reagents, poor separation effect, etc., to achieve high stripping efficiency, The effect of less reagents and no contamination of reagents

Active Publication Date: 2021-06-22
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for recycling nickel-cobalt-manganese waste ternary lithium battery positive electrode materials, to solve the problem that the existing recycling method uses a large amount of reagents, and the organic reagents are toxic and volatile; the process is complicated, and the separation effect is poor. Low recovery efficiency, low electrochemical performance of recycled products and other technical problems

Method used

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  • A kind of nickel-cobalt-manganese waste ternary lithium battery cathode material recycling method
  • A kind of nickel-cobalt-manganese waste ternary lithium battery cathode material recycling method
  • A kind of nickel-cobalt-manganese waste ternary lithium battery cathode material recycling method

Examples

Experimental program
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Effect test

Embodiment 1

[0036] 1) After fully discharging the recovered lithium-ion waste battery (the active material nickel cobalt lithium manganese oxide mass fraction in the positive electrode sheet is 84.9%, and the aluminum mass fraction is 11.7%), the open circuit voltage after discharge is tested to be 0.7V, and then disassembled , take out the positive plate;

[0037] 2) Clean the positive electrode sheet with dimethyl carbonate DMC, remove the residual electrolyte on the positive electrode sheet, and dry it in a vacuum oven at 60°C for 2 hours to obtain a dried positive electrode sheet;

[0038]3) adopt the ICP-OES method to measure the content of elements Li, Co, Ni and Mn on the positive electrode active material of the dry positive electrode sheet, and the molar ratio of lithium and the total transition metals is 0.85:1, get 30 parts of the dry positive electrode sheet, and its Aluminum nitrate containing 1 wt% of the positive active material contained above, that is, 0.255 parts of alum...

Embodiment 2

[0042] Others are the same as in Example 1, except that the aluminum nitrate used is 3% of the weight of the positive electrode active material.

Embodiment 3

[0044] Others are the same as in Example 1, except that the aluminum nitrate used is 5% of the weight of the positive electrode active material.

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Abstract

A method for recycling the positive electrode material of a nickel-cobalt-manganese waste ternary lithium battery, comprising the following steps: discharging and dismantling the waste battery, taking out the positive electrode sheet; cleaning the electrolyte on the positive electrode sheet and drying it; adding the positive electrode sheet and aluminum nitrate to the Stir in deionized water, take out the aluminum foil, clean the residual aluminum nitrate on the aluminum foil with deionized water, and dry it, and turn the cleaning solution back into the mother liquor; add lithium to the mother liquor, and then add 50-70wt% of it dropwise while stirring in the mother liquor The pH of the soluble phosphate aqueous solution is adjusted with ammonia water until no precipitation occurs; the above mixed solution is dried and calcined in sections to obtain a regenerated positive electrode active material. The aluminum nitrate solution used in the present invention can realize rapid and complete separation of the aluminum foil on the positive electrode sheet and the positive electrode active material, which improves the stripping efficiency and the recovery rate of aluminum, and the method is simple and quick, low in cost, safe and environmentally friendly; wet coating-drying is adopted ‑Segmented solid-phase sintering method to prepare nickel-cobalt-manganese ternary lithium battery positive electrode material coated with aluminum phosphate to improve its electrical performance.

Description

technical field [0001] The invention belongs to the technical field of recovery and regeneration of waste lithium-ion batteries, and in particular relates to a method for recovery and reuse of positive electrode materials of nickel-cobalt-manganese waste ternary lithium batteries. Background technique [0002] Since Sony commercialized lithium-ion batteries (LIBs) in 1991, lithium-ion batteries have gradually replaced traditional nickel-metal hydride and nickel-cadmium batteries due to their advantages such as high energy density, high voltage, good cycle performance, small self-discharge, and high charge-discharge efficiency. , as the most popular energy storage technology in applications ranging from portable electronic devices to electric vehicles, the market share of lithium-ion batteries has increased year by year, and the growth rate has been at the top of all rechargeable battery types. [0003] However, the service life of power batteries generally does not exceed 10...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54H01M4/36H01M4/505H01M4/525H01M4/62C01G53/00C01B25/45C01B25/36C22B7/00C22B21/00
CPCC01B25/36C01B25/45C01G53/006C01P2002/72C01P2004/03C01P2004/04C01P2004/80C22B7/006C22B21/0023H01M4/366H01M4/505H01M4/525H01M4/628H01M10/54Y02E60/10Y02W30/84Y02P10/20
Inventor 郭玉国范敏孟庆海殷雅侠万立骏
Owner INST OF CHEM CHINESE ACAD OF SCI
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