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Recycling process of positive electrode materials of waste batteries

A cathode material and waste battery technology, which is applied in the recycling process of waste battery cathode material and the field of battery recycling, can solve the problems of inability to separate the regeneration effect, immature recycling technology, and discarding waste batteries, so as to achieve effective resource reuse and cost reduction. Controllable and reduced emissions

Active Publication Date: 2019-02-12
荆门动力电池再生技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings of the existing technology, one object of the present invention is to provide a battery cutting and sorting process to solve the problems in the prior art of discarding waste batteries, serious environmental pollution, immature recycling technology, and high cost; another aspect of the present invention One purpose is to solve the problem of high carbon content in the negative electrode in the regeneration process of the positive electrode material in the prior art, which cannot be separated and affects the regeneration effect. Another purpose of the present invention is to improve the efficiency of carbon powder flotation removal and improve the positive electrode for subsequent regeneration and repair. Material quality; Another purpose of the present invention is to provide a new process route and method for regeneration and repair of waste battery positive electrode materials. The method is low in cost and good in repair effect, and can effectively reuse waste battery positive electrode materials

Method used

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  • Recycling process of positive electrode materials of waste batteries
  • Recycling process of positive electrode materials of waste batteries
  • Recycling process of positive electrode materials of waste batteries

Examples

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Embodiment 1

[0090]Example 1 of electrode powder flotation carbon removal: In this example, flotation and carbon removal will be carried out on the positive electrode material of the waste Ni-Co-Mn ternary lithium ion battery. The specific steps are as follows:

[0091] SO1. Determine the content of each chemical component and the phase composition of carbon in the waste cathode material of lithium-ion batteries through chemical multi-element and phase analysis. The carbon content in the cathode material is 21.43%, and the main form of carbon is graphite.

[0092] SO2. Prepare 25% concentration of polyethylene glycol aqueous solution as a dispersant for subsequent use, and additionally reserve a 1:1 mixture of kerosene and oxalic acid as a collector, and terpineol oil as a foaming agent.

[0093] SO3. Weigh 40g of the lithium-ion battery waste positive electrode material into the flotation cell of the flotation machine, and add 120g of distilled water according to a solid-to-liquid ratio of...

Embodiment 2

[0098] Example 2 of electrode powder flotation carbon removal: In this example, flotation and carbon removal will be carried out on the waste Ni-Co-Mn ternary lithium-ion battery positive electrode material. The specific steps are as follows:

[0099] SO1. adopt exactly the same waste lithium ion positive electrode material as in Example 1, with a carbon content of 21.43%;

[0100] SO2. Prepare a 25% aqueous solution of sodium hexametaphosphate as a dispersant, and prepare a 1:1 mixture of kerosene and tartaric acid as a collector, and diethyl ether as a foaming agent.

[0101] SO3. Weigh 40g of lithium-ion battery waste positive electrode material into the flotation cell of the flotation machine, and add 120g of distilled water according to a solid-to-liquid ratio of 1:3, add 20ml of sodium hexametaphosphate aqueous solution as a dispersant and stir for 5min, well mixed;

[0102] SO4. Start the tank heating device of the flotation machine, and set the temperature of the mixe...

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Abstract

The invention discloses a recycling process of positive electrode materials of waste batteries. The recycling process includes the steps of completely discharging the waste lithium batteries, subjecting the waste lithium batteries to primary crushing under inert gas protection, removing diaphragm paper through air classification after crushing, performing low-temperature pyrolysis, respectively removing iron materials and aluminum materials through sorting, performing re-pulverization to obtain electrode powder, determining a flotation reagent system according to the phase composition of the electrode powder, performing flotation in a flotation tank, and filtering and drying products at the bottom of the flotation tank to obtain the positive electrode materials; according to the Li / M ratioof the positive electrode materials, calculating the lithium source powder to be added, and mixing water-soluble dispersants and the lithium source powder with water to form a mixed solution; addingthe positive electrode materials to be repaired into the mixed solution, performing cooking activation at a high temperature and under high pressure, continuing to dry the product under normal pressure to obtain uniform mixture powder, and calcining the mixture powder under an aerobic condition to obtain the regenerated and repaired lithium ion battery positive electrode materials. The recycling process has the advantages of low repair cost, high activity after repair, and higher promotion and application value.

Description

technical field [0001] The invention belongs to the field of batteries, and relates to a battery recycling technology, in particular to a recycling process for positive electrode materials of waste batteries, including an electrode powder recovery process, an electrode powder flotation carbon removal process, and a positive electrode material regeneration and repair process. Background technique [0002] The new energy industry is the leading industry in my country's key development. According to the "China New Energy Vehicle Power Battery Industry Development Report (2018)", the production and sales of new energy vehicle power batteries in my country continue to grow rapidly, and my country has become the largest in the world. Incremental market for new energy vehicles. With the entry of new energy vehicles into the market, a large number of automotive power batteries need to be effectively recycled and reused after use. It is estimated that in 2020, the total amount of powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54B03D1/02
CPCH01M10/54Y02W30/84
Inventor 许开华余顺文许鹏云黄冬波
Owner 荆门动力电池再生技术有限公司
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