Method for selectively recovering electrode powder of lithium ion battery

An ion battery and lithium recovery technology, applied in the field of selective recovery of lithium ion battery electrode powder, selective recovery of battery electrode powder, can solve the problems of low recovery rate, limited industrial application value, secondary pollution, etc.

Inactive Publication Date: 2020-11-13
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Generally speaking, the recycling of cathode materials for lithium-ion batteries has problems such as low selectivity, cumbersome recycling procedures, and secondary pollution.
At the same time, after nickel, cobalt and manganese are separated out in the recovery process, lithium loss is serious, the recovery rate is low, and the concentration of lithium-containing solution is low, which limits its industrial application value. Therefore, it is urgent to develop a short-range, efficient and selective recovery of lithium. Technology of Positive Electrode Waste of Ion Batteries

Method used

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  • Method for selectively recovering electrode powder of lithium ion battery
  • Method for selectively recovering electrode powder of lithium ion battery
  • Method for selectively recovering electrode powder of lithium ion battery

Examples

Experimental program
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Embodiment 1

[0069] (1) The lithium-ion battery electrode material is crushed to obtain powder 1, mixed with sulfuric acid, the molar ratio of the positive electrode material to sulfuric acid is 2:1, the concentration of sulfuric acid is 16mol / L, heated to 150°C, and reacted in the air for 8h, to obtain an intermediate mixture;

[0070] (2) Calcining the mixture at 650° C. in vacuum for 2 hours to obtain the product; and

[0071] (3) The product is leached with water, the solid-to-liquid ratio is 400g / L, leached at 20°C for 20h, and separated to obtain a lithium-rich solution and solid slag.

[0072] (4) The lithium-rich solution is concentrated by evaporation to obtain lithium salt, and the solid slag is sequentially subjected to sulfuric acid leaching, extraction and stripping to obtain cobalt salt

[0073] In this embodiment, the recovery rate of lithium in step (3) is calculated to be 96.7% through detection by inductively coupled plasma emission spectroscopy (ICP-OES). According to ...

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Abstract

The invention provides a method for selectively recovering electrode powder of a lithium ion battery. The method comprises the following steps: mixing the electrode powder of the lithium ion battery with sulfuric acid according to a molar ratio of a positive electrode material to sulfuric acid of (1.5-3): 1, and carrying out a heating reaction to obtain an intermediate mixture; roasting the mixture at 300-650 DEG C to obtain a product; and leaching the product with a leaching agent, and carrying out solid-liquid separation to obtain a lithium-rich solution and solid slag.

Description

technical field [0001] The disclosure belongs to the technical field of resource recovery and utilization, and relates to a method for selectively recycling battery electrode powder, in particular to a method for selectively recycling lithium-ion battery electrode powder. Background technique [0002] Lithium-ion battery is a rechargeable battery that does not contain cadmium, lead, mercury and other elements that pollute the environment. Due to its outstanding performance and environmental advantages, lithium-ion batteries have become an ideal choice for portable energy applications and have experienced leapfrog development in terms of technology and market share. In recent years, lithium-ion batteries have gradually replaced nickel-metal hydride batteries and are used to power electric vehicles. Related research has matured. With the expansion of the electric vehicle market, the consumption of lithium-ion batteries will increase sharply, and the service life of lithium-ion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04C01D15/06H01M10/54
CPCC01G51/04C01D15/06H01M10/54C01P2002/72C01P2006/80Y02W30/84
Inventor 孙峙曹宏斌刘春伟郑晓洪
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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