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Method for recycling waste power lithium battery positive electrode material through antibiotic mushroom dreg auxiliary heat treatment

A technology of antibiotic bacteria slag and positive electrode materials, applied in battery recycling, recycling technology, waste collector recycling, etc., can solve the problems of loss of value and high production cost, achieve rich pore structure, good electrochemical performance, and realize harmless The effect of high-value/high-value disposal

Active Publication Date: 2021-08-06
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used pyro-wet combined processes include sulfated roasting, chlorination roasting, carbothermal reduction, etc. Among them, sulfated roasting and chlorination roasting are prone to produce SO x and Cl 2 and other polluting gases, while carbothermal reduction has been widely studied because of its pyrolysis products that have less impact on the environment. Commonly used carbothermal reducing agents include lignite and graphite. Since they can be sold as products, they can be used in the production of recycling fields The cost is relatively high, and the restored toner loses its original value

Method used

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  • Method for recycling waste power lithium battery positive electrode material through antibiotic mushroom dreg auxiliary heat treatment
  • Method for recycling waste power lithium battery positive electrode material through antibiotic mushroom dreg auxiliary heat treatment
  • Method for recycling waste power lithium battery positive electrode material through antibiotic mushroom dreg auxiliary heat treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0050] ①Auxiliary roasting: the solid waste produced in the antibiotic production process is antibiotic slag, and 4.0g of antibiotic slag (containing 15.5% calcium oxalate) and 2.0g of waste nickel cobalt lithium manganate are ground evenly in a mechanical grinder, and placed Roast at 650°C for 1 hour in a tube furnace with an inert atmosphere (referring to Ar gas), and obtain auxiliary roasting slag (also called calcined sand) after cooling;

[0051] ②Low-acid acid leaching: first add 40mL of 1mol / L sulfuric acid solution into a beaker, heat and stir in a 60°C water bath for 20min, add auxiliary roasting slag at a liquid-solid ratio (mL:g) of 20:1, After continuing to stir and react for 3h, filter and wash to obtain pickling solution and pickling residue;

[0052] ③Reuse of antibiotic residues: wash the acid leaching residues with deionized water until the filtrate is neutral, and then directly obtain carbon materials derived from antibiotic residues after drying, without add...

Embodiment 2

[0055] ①Auxiliary roasting: The solid waste produced in the antibiotic production process is antibiotic slag, 3.0g of antibiotic slag (containing 17.3% calcium oxalate) and 1.0g of waste nickel cobalt lithium manganate are ground evenly in a mechanical grinder, and placed Roast at 750°C for 2 hours in a tube furnace with an inert atmosphere, and obtain auxiliary roasted slag after cooling;

[0056] ②Low-acid acid leaching: First, add 50mL of 1.6mol / L hydrochloric acid solution into a beaker, heat and stir in a water bath at 80°C for 20min, and add auxiliary roasting slag at a liquid-solid ratio (mL:g) of 30:1 , after continuing to stir and react for 2h, filter and wash to obtain pickling solution and pickling residue;

[0057] ③Reuse of antibiotic residues: wash the acid leaching residues with deionized water until the filtrate is neutral, and then directly obtain carbon materials derived from antibiotic residues after drying, without additional processing procedures, and perf...

Embodiment 3

[0060] ①Auxiliary roasting: The solid waste produced in the antibiotic production process is antibiotic slag. Grind 4.0g of antibiotic slag (containing 18.1% calcium oxalate) and 1.0g of waste lithium nickelate in a mechanical grinder evenly, and place them in an inert In a tube furnace with atmosphere, roast at 650°C for 1.5h, and obtain auxiliary roasting slag after cooling;

[0061] ②Low-acid acid leaching: First, add 50 mL of 1.2 mol / L nitric acid solution into a beaker, heat and stir in a water bath at 60°C for 20 minutes, and add auxiliary roasting slag at a liquid-solid ratio (mL:g) of 40:1 , after continuing to stir and react for 1h, filter and wash to obtain pickling solution and pickling residue;

[0062] ③Reuse of antibiotic residues: wash the acid leaching residues with deionized water until the filtrate is neutral, and then directly obtain carbon materials derived from antibiotic residues after drying, without additional processing procedures, and perform physical...

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Abstract

The invention belongs to the field of waste lithium ion battery recycling, and particularly discloses a method for recycling a waste power lithium battery positive electrode material through antibiotic mushroom dreg auxiliary heat treatment, the method comprises the following steps that auxiliary roasting treatment is conducted on antibiotic mushroom dregs and waste positive electrode powder in a protective atmosphere at the temperature of 550-850 DEG C to obtain roasted dregs; the roasted dregs are placed in an inorganic strong acid solution to be subjected to acid leaching, solid-liquid separation is conducted, and leaching slag and leaching liquid enriched with positive electrode material elements are obtained; and the leaching slag is washed to be neutral to obtain a carbon material. On the basis of coupling treatment of the antibiotic mushroom dregs and the waste positive electrode material and further cooperation of process conditions, the recycling effect of the positive electrode material can be effectively improved, moreover, the high-quality carbon material can be co-produced, research finds that the recycling rate of the positive electrode material can be close to 100%, and the carbon material obtained through co-production has the reversible capacity of 170.0 mAhg <-1 > or above under the large current of 2.0 Ag <-1 >.

Description

technical field [0001] The invention belongs to the technical field of lithium battery recycling, in particular to a method for recycling positive electrode materials. Background technique [0002] With the rapid development of the global economy, the current energy shortage and environmental pollution are hot issues that people pay attention to. The over-exploitation and utilization of oil resources will lead to their depletion in more than 40 years. Therefore, the active development and utilization of new energy has become an urgent task for all countries in the world. In recent years, countries around the world regard the development of new energy vehicles as an extremely important task. As of 2020, the annual output of pure electric vehicles in my country will exceed 2 million, and the cumulative production and sales will reach 5 million. The rapid development of power lithium batteries will inevitably produce a large number of waste lithium-ion batteries. How to effici...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B1/02C22B26/12C22B47/00C22B23/02C22B23/00H01M10/54C01B32/05
CPCC22B7/001C22B7/007C22B1/02C22B26/12C22B47/00C22B23/02C22B23/0415C22B23/0423C22B23/043C22B23/0438H01M10/54C01B32/05Y02W30/84
Inventor 周向阳马亚赟刘晓剑杨娟唐晶晶
Owner CENT SOUTH UNIV
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