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Waste lithium ion battery recycling method completing stripping and leaching through one step

A technology for a lithium ion battery and a recycling method is applied in the recycling field of waste lithium ion battery stripping and leaching in one step. Strong, simple craftsmanship

Active Publication Date: 2017-11-07
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is time-consuming and labor-intensive, and is only suitable for the case where the processing capacity of the positive electrode sheet is small, and the positive electrode sheet will become embrittled during high-temperature calcination, resulting in incomplete peeling; in addition, it is difficult to filter after alkali leaching, so this process method is not suitable. Industrial operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Collect waste nickel-cobalt-manganese lithium and cobalt oxide lithium batteries, and mechanically crush them after discharge to obtain waste battery pole pieces. Prepare 1.5L of 2.5mol / L sulfuric acid solution in a 5L beaker, place it in a water bath and heat it to 80°C, weigh 500g of waste battery pole pieces and add it to it, and after 10min, stir electrically, add 98% sulfuric acid solution at a speed of 10mL / min After 15 minutes, stop heating, adjust the pH value of the solution to 0.5, weigh 250 g of sodium sulfite solid, dissolve it in hot water to a solution with a mass volume fraction of 25%, add it to the beaker at a speed of 30 mL / min, and control the pH value of the solution at the same time 0.5, reacted for 50min, filtered, and added 320mL of 98% concentrated sulfuric acid in total. The nickel, cobalt, manganese and lithium in the filtrate are recovered by a wet method, and the filter residue is washed and dried and then sampled for analysis. The leaching ...

Embodiment 2

[0025] Collect waste nickel-cobalt-manganese 523 lithium-ion battery positive and negative electrode sheets of 250g each, and manually cut them into 5cm-long sheets. Prepare 3L of 0.5mol / L sulfuric acid solution, place it in a water bath at 60°C, put 500g of the sheared positive and negative electrodes of the lithium-ion battery into the aforementioned sulfuric acid solution, and stir electrically at a stirring speed of 20r / min. Add 98% sulfuric acid solution at a speed of 10 min, and adjust the stirring speed to 200 r / min after 10 min. When the pH value of the solution is 2.0, add 250 mL of 30% hydrogen peroxide at a speed of 12 mL / min, while controlling the pH value of the solution to 0.8, and react for 30 min. Buchner funnel filter, add a total of 98% sulfuric acid solution 270mL. The nickel, cobalt, manganese and lithium in the filtrate are recovered by a wet method, and the filter residue is washed and dried and then sampled for analysis. The leaching rate of nickel, cob...

Embodiment 3

[0027] Collect waste nickel-cobalt lithium manganese oxide and lithium manganate lithium-ion batteries, and mechanically crush them after discharge to obtain waste battery pole pieces; weigh 5kg of waste battery pole pieces, add 30L pure water to a 100L reactor and heat to 80°C, and the waste battery Add the pole pieces into the reactor and stir at a speed of 5r / min. Add 98% sulfuric acid solution at a speed of 120mL / min, after 15min, adjust the stirring speed to 60r / min, stop heating, adjust the pH of the system to 1.0, add 2000g of sodium sulfite solid, control the pH of the solution to 1.2, react for 100min, press filter, add a total of 98% sulfuric acid solution 3500mL. The nickel, cobalt, manganese and lithium in the filtrate are recovered by a wet method, and the filter residue is washed and dried and then sampled for analysis. The leaching rates of nickel, cobalt, manganese and lithium in this embodiment are respectively: 99.78% for nickel, 99.64% for cobalt, 99.82% fo...

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Abstract

The invention discloses a waste lithium ion battery recycling method completing stripping and leaching through one step and belongs to the technical field of electrode material recycling. According to the method, waste lithium ion batteries serve as raw materials; after discharging and manual or mechanical cracking are conducted, the waste lithium ion batteries are immersed into pure water or a sulfuric acid solution with certain concentration; then, acidity of the solution is adjusted, and a reducing agent is added for stripping and leaching; and finally, filtration is conducted, so that valuable metal, namely nickel, cobalt, manganese and lithium, enter filtrate, and copper foil, aluminum foil and graphite enter filter residues to be recycled. The method is simple in process, short in flow and high in operability; the copper foil and the aluminum foil are thoroughly separated from active materials, and the purposes that the copper foil and the aluminum foil in the waste lithium ion batteries are stripped, and the valuable metal, namely nickel, cobalt, manganese and lithium, are leached out of the active materials through one step are achieved; the leaching rate of each type of the valuable metal, namely nickel, cobalt, manganese and lithium is higher than 99%, and the concentration of copper, the concentration of aluminum and the concentration of iron in a leaching solution are each less than 1 g / L; and industrial application value is remarkable.

Description

technical field [0001] The invention belongs to the technical field of recycling electrode materials, and relates to a one-step recycling method for stripping and leaching waste lithium-ion batteries, in particular to a waste lithium-ion battery stripping copper and aluminum foil and leaching nickel, cobalt, manganese and lithium valuable metals One-step recycling method. Background technique [0002] Lithium-ion battery is currently the chemical battery with the best charging performance that has been industrialized in the world. It has the characteristics of high energy density, light weight, small size, long cycle life, no memory and little pollution. It is widely used in mobile phones, notebook computers, cameras, electric It is widely used in portable electronic equipment such as tools, as well as in automobiles, aerospace and medical equipment. In the future, it will be more rapidly developed in the fields of electric bicycles and electric vehicles. In recent years, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C22B47/00C22B26/12H01M10/54
CPCC22B7/007C22B23/043C22B26/12C22B47/00H01M10/54Y02P10/20Y02W30/84
Inventor 常全忠柴艮风王甲琴李兰兰甘梅陈天翼常雪洁王红忠
Owner JINCHUAN GROUP LIMITED
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