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A method and system for reverse preparation of aluminum-doped ternary precursor

A technology of aluminum doping and precursors, applied in electrical components, recycling technology, recycling by waste collectors, etc., can solve problems such as bacterial culture, harsh use conditions, complicated operation of ion exchange methods, and insufficient use of aluminum elements. Achieve the effects of improving cycle stability, overcoming cumbersome separation process steps, and reducing entrainment loss

Active Publication Date: 2019-01-22
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Other methods such as ion exchange method, sulfide bacteria leaching, etc. have successfully recovered valuable metal elements, but these methods have certain limitations, such as ion exchange method is more complicated to operate, the steps are more cumbersome, and it is only suitable for the separation and purification of a small amount of ions ; Bacteria culture, harsh conditions of use, and difficulty in industrialization of sulfide bacteria leaching technology have restricted the application and promotion of the technology
[0007] In addition, in the existing ternary battery recycling technology, the aluminum element is often used as an impurity ion, which is directly removed by precipitation, and then separated and purified to other valuable metals. The aluminum element is not fully utilized, and the existing synthetic ternary material Aluminum element is added again, and the precise regulation of pH increases the difficulty of process control

Method used

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  • A method and system for reverse preparation of aluminum-doped ternary precursor
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Examples

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Embodiment 1

[0100] A certain type of waste ternary lithium battery is used as raw material. Firstly, the waste batteries are discharged, disassembled and sorted to obtain waste ternary cathode materials. Weigh 200g of the waste ternary cathode material and treat it in a muffle furnace at 400°C for 1 hour, remove the binder, quench it with water, and process it in ultrasonic vibration for 30 minutes, so that the cathode material and aluminum foil are peeled off, and a small amount of aluminum chips enter the waste residue of the cathode material . The large mesh screen is used to remove and separate the aluminum foil, and the aluminum foil can be directly used for aluminum smelting after washing. The obtained black fine slag was treated with 3mol / L hydrochloric acid, and 30% hydrogen peroxide was added at the same time to control the solid-liquid ratio to 90g / L, and the temperature was controlled at 80°C and kept stirring for 4 hours, and then filtered to obtain the leaching solution of v...

Embodiment 2

[0106] The positive electrode scraps of a ternary lithium battery from a certain factory are used as raw materials. First, the leftover material is separated into positive and negative electrodes, and impurities such as entrained tape are removed to obtain a ternary positive electrode material. Weigh 500g of waste ternary cathode material and treat it in a muffle furnace at 420°C for 1 hour, remove the binder, quench it with water and treat it in ultrasonic vibration for 60 minutes, so that the cathode material and aluminum foil are peeled off, and a small amount of aluminum chips enter the waste residue of the cathode material . The large mesh screen is used to remove and separate the aluminum foil, and the aluminum foil can be directly used for aluminum smelting after washing. The obtained black fine slag was treated with 2mol / L hydrochloric acid, and 30% hydrogen peroxide was added at the same time, the solid-liquid ratio was controlled to 70g / L, the temperature was contro...

Embodiment 3

[0112] A certain type of waste ternary lithium battery is used as raw material. Firstly, the waste batteries are discharged, disassembled and sorted to obtain waste ternary cathode materials. Weigh 300g of the waste ternary cathode material and treat it in a muffle furnace at 450°C for 1 hour, remove the binder, quench it with water and treat it in ultrasonic vibration for 30 minutes, so that the cathode material and aluminum foil are peeled off, and a small amount of aluminum chips enter the waste residue of the cathode material . The large mesh screen is used to remove and separate the aluminum foil, and the aluminum foil can be directly used for aluminum smelting after washing. The obtained black fine slag was treated with 3mol / L sulfuric acid, and 30% hydrogen peroxide was added at the same time, the solid-liquid ratio was controlled to 90g / L, the temperature was controlled at 80°C, and the leaching solution of valuable metals was obtained by filtration. The acid leachin...

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Abstract

The invention discloses a method and a system for reversely preparing an aluminum doped ternary precursor. The method comprises the following steps of: disassembling a positive electrode sheet from awaste ternary lithium battery; Removing the binder in the positive electrode sheet, and then acid leaching the valuable metal elements in the positive electrode sheet to obtain an acidizing leaching solution; The acidified leachate was treated by ultrafiltration membrane. Using nanofiltration membrane technology, lithium ion in acidified leaching solution was separated from other cations differentfrom lithium ion, and then concentrated by reverse osmosis technology. A lithium ion is precipitate and precipitated by a lithium precipitant, and a nickel ion, a cobalt ion, a manganese ion and an aluminum ion are coprecipitate and precipitated by an alkaline substance to obtain an aluminum doped nickel cobalt manganese ternary precursor. The adoption of ultrafiltration-Nanofiltration The aluminum doped ternary precursor was directly synthesized by reverse osmosis combined with trace aluminum in acidification leaching solution. The process is simple and environmentally friendly, and the valuable elements are recycled comprehensively.

Description

technical field [0001] The invention relates to a method and a corresponding system for reversely synthesizing an aluminum-doped ternary precursor by using waste ternary positive electrode materials, a ternary positive electrode material, and a corresponding system, belonging to the technical field of lithium battery recycling. Background technique [0002] Lithium and its compounds are strategic materials of great significance in the national economy and national defense construction, and are also new green energy materials closely related to people's lives. As a new type of chemical power source, lithium-ion battery has become the main energy source of 3C electronic products, accounting for more than 80% of the consumer electronics market. In recent years, the continuous progress of lithium battery technology and the improvement of energy density have greatly increased the demand in the fields of new energy vehicles and energy storage power supplies, which has led to a sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54H01M4/505H01M4/525
CPCH01M4/505H01M4/525H01M10/54Y02E60/10Y02W30/84
Inventor 彭正军王敏祝增虎王怀有赵有璟贾国凤李积升
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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