Method for extracting lithium from waste lithium ion battery and application thereof

A lithium-ion battery and battery technology, applied in the field of lithium extraction, can solve the problems of high impurities in lithium-rich solution, high work intensity, and many control points, and achieve the effects of no secondary pollution, short recovery process, and high recovery rate

Pending Publication Date: 2022-04-19
威立雅新能源科技(江门)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although there are some recycling methods for lithium ion batteries in the prior art, they are generally acid or alkali leaching processes to prepare products such as lithium carbonate or lithium hydroxide, and the acid dissolution in the existing lithium ion dissolution process will cause some Co, Impurities such as Ni, Mn, Cu are stripped out; Alkali dissolution will lead to the inc

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  • Method for extracting lithium from waste lithium ion battery and application thereof
  • Method for extracting lithium from waste lithium ion battery and application thereof
  • Method for extracting lithium from waste lithium ion battery and application thereof

Examples

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Embodiment 1

[0043]With the reclaimed ternary lithium battery as raw material (see Table 1 for the composition), the total lithium in the battery is calculated at 3.40%, and 400 mesh activated carbon powder is used as the extractant, and 20.015g of black powder and activated carbon powder are weighed (the amount of activated carbon powder is calculated according to the amount of black powder). Lithium ions in the powder: carbon = 1:0.5 molar ratio) were mixed and ground for 60 minutes, and the ground mixture was desorbed in a tube furnace at 700°C for 180 minutes under a nitrogen protection atmosphere, and then heated to the cooled heat Add 300mL deionized water to the deionized product, stir at 500rpm normal temperature on a magnetic stirrer for 3 hours, after the dissolved matter in the material is fully dissolved, filter to obtain the lithium-containing aqueous solution, adjust the concentration of the lithium-containing aqueous solution with sodium carbonate solid (analytical pure) The ...

Embodiment 2

[0048] With the reclaimed ternary lithium battery as raw material (see Table 1 for the composition), the total lithium in the battery is calculated as 3.40%, and 400 mesh activated carbon powder is used as the extractant, and 20.021g of black powder and activated carbon powder are weighed (the amount of activated carbon powder is calculated according to the amount of black powder). Lithium ions in the powder: carbon = 1:1 molar ratio) were mixed and ground for 60 minutes, and the ground mixture was desorbed in a tube furnace at 700°C for 180 minutes under a nitrogen protective atmosphere, and then transferred to the cooled heat Add 300mL deionized water to the deionized product, stir at 500rpm normal temperature on a magnetic stirrer for 3 hours, after the dissolved matter in the material is fully dissolved, filter to obtain the lithium-containing aqueous solution, adjust the concentration of the lithium-containing aqueous solution with sodium carbonate solid (analytical pure) ...

Embodiment 3

[0053] With the reclaimed ternary lithium battery as raw material (see Table 1 for the composition), the total lithium in the battery is calculated at 3.40%, and 400 mesh activated carbon powder is used as the extractant, and 20.024g of black powder and activated carbon powder are weighed (the amount of activated carbon powder is calculated according to the amount of black powder). Lithium ions in the powder: carbon = 1:1.5 molar ratio) were mixed and ground for 60 minutes, and the ground mixture was desorbed in a tube furnace at 700°C for 180 minutes under a nitrogen protective atmosphere, and then transferred to the cooled heat Add 300mL deionized water to the deionized product, stir at 500rpm normal temperature on a magnetic stirrer for 3 hours, after the dissolved matter in the material is fully dissolved, filter to obtain the lithium-containing aqueous solution, adjust the concentration of the lithium-containing aqueous solution with sodium carbonate solid (analytical pure)...

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Abstract

The invention discloses a method for extracting lithium from a waste lithium ion battery. The method comprises the following steps: mixing battery black powder with carbon, grinding and thermally desorbing; carrying out water immersion on a product after thermal desorption, and filtering to obtain a lithium-containing aqueous solution; and adjusting the pH value of the lithium-containing aqueous solution with sodium salt, concentrating and filtering to obtain a lithium carbonate product. The method for extracting the lithium from the waste lithium ion battery has the advantages that the lithium recovery process is short, the operation is simple, and the recovery rate is high; the active carbon powder is adopted as an extracting agent, lithium is extracted through thermal desorption, the lattice structure of metal oxide is destroyed, dissolution of the cathode material by downstream hydrometallurgy enterprises is facilitated, and no additional additive needs to be added; only the activated carbon powder is added, other chemical substances are not added in the main production line process, no new'three wastes' are discharged, and no secondary pollution is caused.

Description

technical field [0001] The invention relates to the technical field of recycling waste batteries, in particular to a method for extracting lithium from lithium-ion batteries and its application. Background technique [0002] According to the "Technology Roadmap for Energy-Saving and New Energy Vehicles" issued by the Society of Automotive Engineers of China, by 2030, the proportion of new energy vehicle sales in total vehicle sales will rise to about 40%. In 2035, new energy vehicles will account for more than 50% of total vehicle sales. Accompanied by it, the generation of a large number of waste lithium-ion batteries will pose a severe challenge to the disposal of electronic waste and environmental protection in my country and the world. On the one hand, waste lithium-ion batteries contain toxic and flammable electrolytes, heavy metals and other harmful components. If not handled properly, it will cause serious water and soil pollution, and even cause fires, explosions an...

Claims

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Application Information

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IPC IPC(8): C01D15/08H01M10/54
CPCC01D15/08H01M10/54C01P2006/80Y02W30/84
Inventor 谢经芝肖义兵邓慧玲刘献华黄登坡
Owner 威立雅新能源科技(江门)有限公司
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