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Method for recycling waste lithium battery positive electrode material under assistance of biomass waste

A technology for waste lithium batteries and cathode materials, applied in the field of ternary cathode materials, can solve the problems of high recycling production cost, complex procedures, secondary pollution, etc., and achieve the effects of low cost, shortened process flow, and full recovery.

Active Publication Date: 2020-07-17
湖南烯富环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pretreatment is to obtain the positive plate after discharge, disassembly and sorting; the purpose of the secondary treatment is to realize the separation of the positive active material and the aluminum foil. The main methods are: pyrolysis method, organic solvent separation method, alkali leaching method, etc.; depth The treatment includes two parts: leaching and separation and purification, mainly to realize the recovery of valuable metals. In the recovery and utilization of valuable metal resources in traditional methods, they are generally recovered in the form of metal salts. In the process of metal separation and impurity removal, the process is complicated , easy to produce secondary pollution, and the cost of recycling is relatively high

Method used

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  • Method for recycling waste lithium battery positive electrode material under assistance of biomass waste
  • Method for recycling waste lithium battery positive electrode material under assistance of biomass waste
  • Method for recycling waste lithium battery positive electrode material under assistance of biomass waste

Examples

Experimental program
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Effect test

Embodiment 1

[0063] ①Pretreatment: the waste power lithium battery (the active material of the positive electrode is LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 ) into 5mol / L salt water for 30min discharge treatment, dry the discharged battery at 80°C, disassemble and separate the positive electrode sheet, dissolve the positive electrode sheet in N-methylpyrrolidone, and remove the current collector in the positive electrode sheet , filtered, washed and dried to obtain the waste positive electrode active material;

[0064] ②Reduction roasting: Weigh 10g of waste positive electrode active material and appropriate amount of corn stalks, the doping amount of corn stalks is 30%, ball mill for 2h to mix evenly, put the mixed materials in a tube furnace, and sinter at 800℃ for 5h under Ar atmosphere to obtain reduction Roasting slag;

[0065] ③Water immersion: Take the above-mentioned reduced roasted slag, add it to 350mL of water according to the liquid-solid ratio (mL:g) of 30:1, and magnetically stir at 2...

Embodiment 2

[0072] ①Pretreatment: the waste power lithium battery (the active material of the positive electrode is LiNi 0.5 co 0.2 mn 0.3 o 2 ) into 5mol / L salt water for 30min discharge treatment, dry the discharged battery at 80°C, disassemble and separate the positive electrode sheet, dissolve the positive electrode sheet in N-methylpyrrolidone, and remove the current collector in the positive electrode sheet , filtered, washed and dried to obtain the waste positive electrode active material;

[0073] ②Reduction roasting: Weigh 10g of waste positive electrode active material and appropriate amount of chaff, the doping amount of chaff is 20%, ball mill for 2h until evenly mixed, the mixed material is placed in a tube furnace, and heated in N 2 Sintering at 750°C for 6 hours under atmosphere to obtain reduced roasted slag;

[0074] ③Water immersion: Take the above-mentioned reduced roasted slag, add it to 500mL of water according to the liquid-solid ratio (mL:g) of 50:1, and magneti...

Embodiment 3

[0082] ①Pretreatment: the waste power lithium battery (the active material of the positive electrode is LiNi 0.6 co 0.2 mn 0.2 o 2 ) into 5mol / L salt water for 30min discharge treatment, dry the discharged battery at 80°C, disassemble and separate the positive electrode sheet, dissolve the positive electrode sheet in N-methylpyrrolidone, and remove the current collector in the positive electrode sheet , filtered, washed and dried to obtain the waste positive electrode active material;

[0083] ②Reduction roasting: Weigh 10g of waste positive electrode active material and appropriate amount of rice straw, the doping amount of rice straw is 25%, ball mill for 2h to mix evenly, put the mixed material in a tube furnace, and sinter at 750°C for 5h under Ar atmosphere to obtain reduced roasting slag ;

[0084] ③Water immersion: Take the above-mentioned reduced roasted slag, add it to 550mL water according to the liquid-solid ratio (mL:g) of 60:1, and magnetically stir at 30°C fo...

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Abstract

The invention discloses a method for recycling a waste lithium battery positive electrode material under the assistance of biomass waste, and belongs to the technical field of resource cyclic utilization. According to the method, the biomass waste is used as a reducing agent, and the recovery of a waste power lithium battery and the regeneration of a ternary positive electrode material are organically combined, so that the cyclic utilization of the waste power lithium battery is realized at low cost. The method is short in technological process and low in synthesis cost and is suitable for large-scale production, and the regenerated nickel-cobalt-manganese ternary positive electrode material is excellent in performance and has the very good economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of resource recycling, and in particular relates to the recycling of positive electrode materials in waste lithium ion batteries and the recycling and preparation of regenerated ternary positive electrode materials. Background technique [0002] In recent years, with the increasing consumption of fossil fuels and the gradual enhancement of people's awareness of environmental protection, chemical power sources have been widely used as alternative energy sources, especially in the field of electric vehicles. The rapid growth of power lithium batteries has also resulted in a large number of waste lithium-ion batteries. According to the forecast of China Automotive Technology Research Center, based on the sales of more than 300,000 new energy vehicles in 2015, and the number of new energy vehicles in 2020 will be about 5 million. It is estimated that by 2020, only the power batteries of hybrid and pure electric (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525H01M10/54H01M2004/028Y02E60/10Y02W30/84
Inventor 马亚赟周向阳杨娟唐晶晶王辉周昊宸刘晓剑王鹏周进辉周向清周昶猷
Owner 湖南烯富环保科技有限公司
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