Recovery method of waste ternary lithium battery positive electrode material

A ternary lithium battery and positive electrode material technology, which is applied in battery recycling, waste collector recycling, recycling technology, etc., can solve the problems of ternary lithium battery recycling methods to be studied, poor economy, hazards, etc., to achieve high value The effects of cleaning and recycling, reducing the difficulty of metal separation, and improving recycling economy

Inactive Publication Date: 2021-07-16
北京佰利格瑞资源科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The positive electrode material of the ternary lithium battery is LiNi x co y mn 1-x-y o 2 , the types of valuable metal ions are rich and the content is high. If they are not treated or handled improperly, it will not only lead to the loss of valuable metals, but also cause serious pollution and great harm to water sources, soil and human health.
This method jointly leaches nickel, cobalt, manganese and lithium in the positive electrode material, resulting in difficult solution separation, long process, high cost, and lithium resources have not been most effectively recycled, resulting in low added value and poor economy.
[0005] Therefore, the recycling method of waste ternary lithium batteries still needs to be studied.

Method used

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  • Recovery method of waste ternary lithium battery positive electrode material
  • Recovery method of waste ternary lithium battery positive electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Get ternary lithium battery positive and negative electrode mixture 100g (negative electrode material accounts for 32%), in CO 2 Roast at 600°C for 2 hours under atmosphere, and then cool to obtain the roasted product, add 1000ml of water, leaching at 50°C for 2 hours, and feed CO at 1.0L / min at the same time 2 , The leaching rate of lithium is 85.6%. After filtering, water leaching liquid and water leaching residue are obtained, and other metals are not leached.

[0037] The resulting water immersion solution was heated at 80 °C for 3 h and CO was collected 2 , filtered to obtain lithium carbonate and the filtrate, the resulting CO 2 And the filtrate is returned to the water immersion process for reuse. Add 450ml of water (liquid-solid ratio 8:1) and 12.5ml of concentrated sulfuric acid to the obtained water leaching residue, and leaching at 90°C for 3 hours, the leaching rates of nickel-cobalt-manganese-copper-aluminum are 99.5%, 99.4%, 99.1%, 99.3% respectively. %...

Embodiment 2

[0042] Get ternary lithium battery positive and negative electrode mixture 100g (negative electrode material accounts for 30%), in CO 2 Roast at 650°C for 3 hours under the atmosphere, and then cool to obtain the roasted product, add 1000ml of water, leaching at 75°C for 2 hours, and feed CO at 1.5L / min at the same time 2 , The leaching rate of lithium is 92.3%. After filtering, water leaching liquid and water leaching residue are obtained, and other metals are not leached.

[0043] The resulting water immersion solution was heated at 80 °C for 1 h and CO was collected 2 , filtered to obtain lithium carbonate and the filtrate, the resulting CO 2 And the filtrate is returned to the water immersion process for reuse. Add 480ml of water (liquid-solid ratio 9:1) and 16.6ml of concentrated sulfuric acid to the obtained water leaching residue, and leaching at 70°C for 2h, the leaching rates of nickel-cobalt-manganese-copper-aluminum are 99.3%, 99.4%, 99.2%, respectively. 99.2%, 9...

Embodiment 3

[0048] Get ternary lithium battery positive and negative electrode mixture 100g (negative electrode material accounts for 35%), in CO 2 Roast at 500°C for 4 hours under atmosphere, and then cool to obtain the roasted product, add 1000ml of water, leaching at 25°C for 5 hours, and feed CO at 2.0L / min at the same time 2 , the leaching rate of lithium is 88.6%. After filtering, water leaching liquid and water leaching residue are obtained, and other metals are not leached.

[0049] The resulting water immersion solution was heated at 70 °C for 5 h and CO was collected 2 , filtered to obtain lithium carbonate and the filtrate, the resulting CO 2 And the filtrate is returned to the water immersion process for reuse. Add 320ml of water (liquid-solid ratio 6:1) and 9.9ml of concentrated sulfuric acid to the obtained water leaching residue, and leaching at 90°C for 3h, the leaching rates of nickel-cobalt-manganese-copper-aluminum are 99.2%, 99.3%, 99.5%, 98.6%, respectively. %, 99....

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Abstract

The invention provides a recovery method of a waste ternary lithium battery positive electrode material. The method comprises the following steps: roasting the ternary lithium battery positive electrode material and a reducing agent; performing water leaching treatment on the roasted product and introducing CO2 at the same time, and obtaining a solution rich in lithium bicarbonate through solid-liquid separation. According to the method, lithium in the ternary lithium battery positive electrode material is transformed into lithium carbonate in advance by controlling the roasting process, the lithium element can be selectively and preferentially extracted through the subsequent separation process, the production process is simplified, and the recovery cost is reduced.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery treatment, in particular to a method for recycling the positive electrode material of a waste ternary lithium battery. Background technique [0002] Ternary lithium battery has excellent performance, safety and stability, relatively high energy density, supports high-rate discharge, moderate production cost, and has a very wide range of application scenarios. At present, ternary lithium battery is mainly used in the field of power lithium battery. The positive electrode material of the ternary lithium battery is LiNi x co y mn 1-x-y o 2 , the types of valuable metal ions are rich and the content is high. If they are not treated or handled improperly, it will not only lead to the loss of valuable metals, but also cause serious pollution and great harm to water sources, soil and human health. [0003] At present, the recycling methods of waste ternary lithium batteries are mainly div...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M10/54C22B1/02C22B7/00C22B26/12C22B23/00C22B47/00
CPCC01G53/006C01P2004/61C01P2006/11C01P2006/40C01P2006/80C22B1/02C22B7/006C22B7/007C22B23/0415C22B26/12C22B47/00H01M10/54Y02W30/84Y02P10/20
Inventor 周立杰石学谦王娜曹阳
Owner 北京佰利格瑞资源科技有限公司
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