Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for utilizing eutecticevaporate solvent for leaching valuable metal in waste lithium ion batteries

A deep eutectic solvent and lithium-ion battery technology, applied in secondary batteries, battery recycling, recycling technology, etc., can solve the problems of acid gas and waste water, high consumption of acid and reducing agent, poor operating environment, etc. , to achieve the effect of green leaching process, improving leaching rate and improving leaching efficiency

Inactive Publication Date: 2020-09-22
NANCHANG HANGKONG UNIVERSITY
View PDF12 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, for the leaching of valuable metals in the positive electrode waste of waste lithium-ion batteries, inorganic acids or organic acids are mostly used as leaching agents, and hydrogen peroxide or sodium sulfite is used as reducing agents. This process consumes a lot of acid and reducing agents, and the resulting acid Gas and waste water are difficult to handle, the operating environment is poor, and the environment is harmful

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for utilizing eutecticevaporate solvent for leaching valuable metal in waste lithium ion batteries
  • Method for utilizing eutecticevaporate solvent for leaching valuable metal in waste lithium ion batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The leaching of lithium, cobalt, nickel, manganese in waste nickel-cobalt lithium manganate battery in embodiment 1

[0024] Mix choline chloride and lactic acid at a molar ratio of 1:1, heat and stir at 60°C for 12 hours to prepare a deep eutectic solvent; discharge and mechanically pulverize the pretreated waste lithium battery powder (described The powder is obtained by mixing and crushing the positive and negative electrodes of waste lithium-ion batteries, the shell, etc. The positive electrode material is nickel-cobalt lithium manganese oxide material, the negative electrode is graphite, and contains aluminum, copper and a small amount of crushed aluminum and copper introduced by the positive and negative current collectors. Iron) was added to the above-mentioned deep eutectic solvent and mixed thoroughly. The solid-to-liquid ratio of the battery powder and the deep eutectic solvent was 85g / L. Ultrasonic vibration was performed at 20°C with a power of 480w for 200mi...

Embodiment 2

[0025] The leaching of lithium, cobalt, nickel, manganese in the waste nickel-cobalt lithium manganate battery of embodiment 2

[0026] Choline chloride and malonic acid were mixed at a molar ratio of 1.5:1, heated and stirred at 90°C for 11 hours to obtain a deep eutectic solvent; the waste lithium battery powder ( The powder is obtained by mixing and crushing the positive and negative electrodes of waste lithium-ion batteries, the shell, etc., the positive electrode material is nickel-cobalt lithium manganese oxide material, the negative electrode is graphite, and contains aluminum, copper and a small amount of broken materials introduced by the positive and negative current collectors. The imported iron) was added to the above-mentioned deep eutectic solvent and mixed thoroughly, the solid-liquid ratio of the battery powder and the deep eutectic solvent was 50g / L, and the power of 500w was ultrasonically oscillated for 180min at 25°C. Stand still and filter to obtain the le...

Embodiment 3

[0027] The leaching of lithium, cobalt, nickel, manganese in the waste nickel-cobalt lithium manganate battery of embodiment 3

[0028] Mix choline chloride and citric acid at a molar ratio of 2:1, heat and stir the reaction at 70°C for 10 hours to obtain a deep eutectic solvent; discharge and mechanically pulverize the pretreated waste lithium battery powder ( The powder is obtained by mixing and crushing the positive and negative electrodes of waste lithium-ion batteries, the shell, etc., the positive electrode material is nickel-cobalt lithium manganese oxide material, the negative electrode is graphite, and contains aluminum, copper and a small amount of broken materials introduced by the positive and negative current collectors. The iron brought in) was added to the above-mentioned deep eutectic solvent and mixed thoroughly. The solid-liquid ratio of the battery powder and the deep eutectic solvent was 60g / L. Ultrasonic vibration was performed at 30°C with a power of 400w ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for utilizing eutecticevaporate solvent for leaching valuable metal in waste lithium ion batteries and relates to the technical field of comprehensive recovery and utilization of waste lithium ion battery materials. The method comprises the following steps that firstly, the waste lithium ion battery materials are added into eutecticevaporate solvent, ultrasonic oscillation is carried out on the condition of 20 DEG C-40 DEG C, and standing is carried out; and secondly, slurry obtained after ultrasonic treatment is filtered, and separated to obtain a leaching solution containing the valuable metal. The method has the beneficial effects that the eutecticevaporate solvent is adopted for leaching the valuable metal in the waste lithium ion batteries, ultrasonicwaves are adopted for treating a solution obtained after the eutecticevaporate solvent and the waste lithium ion battery materials are mixed, by means of the cavitation effect of the ultrasonic waves,penetrating power of the eutecticevaporate solvent can be increased, the eutecticevaporate solvent can leach out the valuable metal in the waste lithium ion battery materials in a reinforced manner,and thus the leaching efficiency and the leaching rate of the valuable metal in the waste lithium ion battery materials can be improved greatly.

Description

technical field [0001] The invention relates to the technical field of comprehensive recycling of waste lithium ion battery materials, in particular to a method for leaching valuable metals in waste lithium ion batteries by using a deep eutectic solvent. Background technique [0002] Lithium is located in the first main group of the second period of the periodic table, and is the lightest metal with the least electronegativity. The corresponding lithium-ion battery has high working voltage, high specific energy, small volume, light weight, long cycle life, No memory effect and other advantages, therefore, lithium-ion batteries are more and more widely used. However, the service life of lithium-ion batteries is generally 3 to 6 years, and the number of waste lithium-ion batteries due to decommissioning or other reasons is increasing. The cathode materials currently used in commercial lithium-ion batteries are lithium iron phosphate, lithium cobalt oxide, lithium manganese ox...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22B7/00C22B26/12C22B47/00C22B23/00H01M10/0525H01M10/54
CPCC22B7/006C22B23/0407C22B26/12C22B47/00H01M10/0525H01M10/54Y02E60/10Y02W30/84Y02P10/20
Inventor 刘春力姚俊霞曾桂生罗旭彪姬海燕关乾李英朋张捷菲
Owner NANCHANG HANGKONG UNIVERSITY