Method for recycling valuable metals of waste lithium ion battery and regenerating ternary positive electrode material

A technology for lithium-ion batteries and positive electrode materials, which is applied in the field of recycling valuable metals in waste lithium-ion batteries and regenerated ternary positive electrode materials. It can solve the problems of long high-temperature treatment time, low purity of recycled materials, and a large number of chemical reagents to achieve recycling. Low cost, safe and easy to obtain, and simple process

Pending Publication Date: 2021-01-08
江苏载驰科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pyrometallurgy is to directly use high temperature treatment to extract the metal or metal oxide in the electrode. The process is simple, but the purity of the recovered material is low and the high temperature treatment takes a long time and consumes a lot of energy. Organic substances such as electrolytes and binders in waste batteries will be The high temperature reaction produces harmful gases, and it is necessary to install supporting facilities for secondary waste gas treatment
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Method used

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  • Method for recycling valuable metals of waste lithium ion battery and regenerating ternary positive electrode material
  • Method for recycling valuable metals of waste lithium ion battery and regenerating ternary positive electrode material
  • Method for recycling valuable metals of waste lithium ion battery and regenerating ternary positive electrode material

Examples

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Embodiment 1

[0046] Discharge, disassemble, and remove impurities from the waste nickel-cobalt lithium manganate ternary battery to obtain the positive electrode sheet, put the positive electrode sheet in a muffle furnace at 700°C for 2 hours, and remove the conductive agent and binder in the positive electrode sheet to obtain the waste tertiary battery. Yuan cathode material. Weigh 50g of waste and old ternary positive electrode material and place it in a 500ml beaker, add water to adjust the mass volume ratio of positive electrode material to water to be 1:5, then add acetic acid with a molar concentration of 2mol / L, and the reducing agent sodium thiosulfate with a molar concentration of 1mol / L L, the above mixed solution was reacted at 80° C. for 4 hours under magnetic stirring, and filtered to obtain a filtrate rich in valuable metal ions. The content of lithium ions and transition metal ions (nickel ions, cobalt ions, manganese ions) in the filtrate is determined by ICP-OES, and the m...

Embodiment 2

[0048] Discharge, disassemble, and remove impurities from the waste nickel-cobalt lithium manganate ternary battery to obtain the positive electrode sheet, put the positive electrode sheet in a muffle furnace at 600°C for 4 hours, and remove the conductive agent and binder in the positive electrode sheet to obtain the waste tertiary battery. Yuan cathode material. Weigh 30 g of the waste ternary positive electrode material and place it in a 500ml beaker, add water to adjust the mass volume ratio of the positive electrode material to water to be 1:3, then add maleic acid with a molar concentration of 2mol / L, and the reducing agent hydrazine hydrate with a molar concentration of 1mol / L L, the above mixed solution was reacted at 80° C. for 4 hours under magnetic stirring, and filtered to obtain a filtrate rich in valuable metal ions. The content of lithium ions and transition metal ions (nickel ions, cobalt ions, manganese ions) in the filtrate is determined by ICP-OES. According...

Embodiment 3

[0050] Discharge, disassemble, and remove impurities from the waste nickel-cobalt lithium manganate ternary battery to obtain the positive electrode sheet, put the positive electrode sheet in a muffle furnace at 600°C for 4 hours, and remove the conductive agent and binder in the positive electrode sheet to obtain the waste tertiary battery. Yuan cathode material. Weigh 50 g of the waste ternary positive electrode material and place it in a 500ml beaker, add water to adjust the mass volume ratio of the positive electrode material to water to be 1:3, then add maleic acid with a molar concentration of 2mol / L, and the reducing agent hydrazine hydrate with a molar concentration of 1mol / L L, the above mixed solution was reacted at 80° C. for 4 hours under magnetic stirring, and filtered to obtain a filtrate rich in valuable metal ions. Determine the content of lithium ions and transition metal ions (nickel ions, cobalt ions, manganese ions) in the filtrate by ICP-OES, according to ...

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Abstract

The invention provides a method for recycling valuable metals of a waste lithium ion battery and regenerating a ternary positive electrode material. The method comprises the following steps of: discharging the waste lithium ion battery, performing disassembling, and removing impurities to obtain a positive plate, and removing a conductive agent and a binder in the positive plate at high temperature to obtain the waste ternary positive electrode material; according to a first regeneration route, valuable metal ions can be leached out from organic acid or a eutectic solvent added with a reducingagent, a sodium alginate solution is adopted to crosslink the metal ions to form an egg box structure gel with a three-dimensional net structure, and the regenerated ternary positive electrode material is obtained after calcination; according to a second regeneration route, ball milling nanocrystallization is beneficial for lithium ions to enter particles to supplement lithium, gel is used for repairing an uneven surface, and the regenerated ternary positive electrode material is obtained after calcination. The two regeneration routes are simple and easy to operate, the steps of separation and purification of valuable metal ions and the like are avoided, the method is novel, low in cost, and easy to realize industrialization, and the prepared material has excellent electrochemical performance.

Description

technical field [0001] The invention relates to a method for recovering valuable metals of waste lithium ion batteries and regenerating ternary positive electrode materials, and belongs to the technical field of recovery and regeneration of waste lithium ion batteries. Background technique [0002] In lithium-ion batteries, especially in the cost structure of automotive power batteries, material costs account for nearly 75%. In the material cost, the cathode material accounts for 41%. The market size of NCM ternary cathode materials in my country has shown rapid growth. In 2018, the market size of NCM ternary cathode materials in my country reached 23 billion yuan, a year-on-year increase of 33.72%. The market scale of NCM ternary cathode materials in my country has shown rapid growth, mainly benefiting from the rapid development of domestic automotive power batteries, low-cobalt 3C batteries, power tools, electric bicycles and other application markets, driving the marke...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M4/505H01M4/525H01M10/0525H01M10/54B82Y30/00B82Y40/00
CPCC01G53/50H01M4/505H01M4/525H01M10/54H01M10/0525B82Y30/00B82Y40/00C01P2004/03C01P2002/72C01P2006/40Y02W30/84Y02E60/10
Inventor 张娟赵明才汪炜
Owner 江苏载驰科技股份有限公司
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