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A method for regenerating lithium-rich manganese-based cathode materials using waste lithium batteries

A technology for waste lithium batteries and positive electrode materials, which is applied in the field of regenerating lithium-rich manganese-based positive electrode materials from waste lithium batteries, can solve the problems of complex preparation process and environmental pollution, and achieve the effects of high recycling efficiency, cost reduction, and simple method

Active Publication Date: 2021-12-31
兰溪博观循环科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The comprehensive leaching rate of valuable metals such as nickel, cobalt, and lithium in the pressurized ammonia leaching process of the invention reaches 92%, and the two-stage leaching realizes the comprehensive recovery rate of valuable metals such as nickel, cobalt, lithium, manganese, and aluminum in waste ternary positive electrode materials It can reach more than 95%, but the first stage of leaching still needs a pressurized environment, the preparation process is complicated, and the second stage of leaching will produce sulfuric acid, which seriously pollutes the environment

Method used

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  • A method for regenerating lithium-rich manganese-based cathode materials using waste lithium batteries
  • A method for regenerating lithium-rich manganese-based cathode materials using waste lithium batteries
  • A method for regenerating lithium-rich manganese-based cathode materials using waste lithium batteries

Examples

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Effect test

Embodiment 1

[0032] This embodiment includes the following steps:

[0033] (1) Pretreat the waste nickel-cobalt-manganese ternary lithium-ion battery, including decomposing and disassembling the battery to obtain the positive electrode, and then peeling off the positive electrode material from the positive electrode, crushing and calcining to obtain the positive electrode material powder; 5g of the positive electrode material powder Mechanically mix 1g of graphite with a ball mill for 1 hour to obtain a powder uniformly mixed with graphite; sinter the powder uniformly mixed with graphite in an argon atmosphere at a sintering temperature of 800°C for 1 hour to obtain a powder containing lithium, nickel, cobalt and Mixed powder of manganese element;

[0034] (2) Mix 1 g of reduced powder with 18.375 g of NH 3 h 2 O, 7g NH 4 HCO 3 Add deionized water to 50ml, heat to 60°C in a water bath, leach for 8 hours under magnetic stirring, and filter to obtain the leachate. Take 1g of leaching re...

example 2

[0041] This embodiment includes the following steps:

[0042] (1) Pretreat the waste nickel-cobalt-manganese ternary lithium-ion battery, including decomposing and disassembling the battery to obtain the positive electrode, and then peeling, crushing and calcining the positive electrode material from the positive electrode to obtain the positive electrode material powder; mix 5g of the positive electrode material powder with 1g Graphite is mechanically mixed with a ball mill for 1 hour to obtain a uniformly mixed powder with graphite, and sintered in an argon atmosphere at 800°C for 1 hour to obtain a mixed powder containing lithium, nickel, cobalt and manganese;

[0043] (2) Take 1g of mixed powder and 18.375 g of NH 3 h 2 O, 7 gNH 4 HCO 3 , add deionized water to 50mL, heat to 60°C in a water bath, leaching for 8 hours under magnetic stirring, and filter to obtain leaching solution and manganese-containing leaching residue. Take 1g of leaching residue (according to IPC a...

example 3

[0048] This embodiment includes the following steps:

[0049] (1) Pretreat the waste nickel-cobalt-manganese ternary lithium-ion battery, including decomposing and disassembling to obtain the positive electrode, and then peel and crush the positive electrode material from the positive electrode to obtain the positive electrode material powder; use a ball mill to process 5g of positive electrode material powder and 1g of graphite Mix mechanically for 1 hour to obtain a uniform powder mixed with graphite, and sinter in an argon atmosphere at 800°C for 1 hour to obtain a mixed powder containing lithium, nickel, cobalt and manganese;

[0050] (2) Mix 1 g of mixed powder with 18.375 g of NH 3 h 2 O, 7 gNH 4 HCO 3 , add deionized water to 50mL, heat to 60°C in a water bath, leaching for 8 hours under magnetic stirring, and filter to obtain leaching solution and manganese-containing leaching residue. Take 1g of leaching residue (detected by IPC, the amount of manganese substance ...

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Abstract

A method for regenerating lithium-rich manganese-based cathode materials from waste lithium batteries. In the method of the present invention, the positive electrode material powder obtained through pretreatment is subjected to carbothermal reduction, and the waste ternary nickel-cobalt-manganese positive electrode material is reduced to a mixture of nickel, cobalt, lithium carbonate and manganese oxide for ammonia leaching, and then one-step sol-gel The precursor is prepared by the method, and finally the lithium-rich manganese-based positive electrode material is obtained by calcination; the mixed powder of the valuable metal is subjected to carbothermal reduction, which avoids the process requirement that pressure must be used in the leaching process, and avoids the step-by-step separation and recovery of multiple metals. , shorten the process flow, simple operation, reduce the cost, and increase the value of recycled products.

Description

technical field [0001] The invention belongs to the field of recycling waste lithium batteries, and in particular relates to a method for regenerating lithium-rich manganese-based positive electrode materials from waste lithium batteries. Background technique [0002] With the development of science and technology, the demand for the quality of human life is constantly improving, and the requirements for energy storage equipment are getting higher and higher. Lithium-ion batteries are widely used in electronic products such as portable devices and electric vehicles due to their high operating voltage, light weight, no memory effect, and long cycle life. It is expected that the demand for plug-in electric vehicles (PHEV) and electric vehicles (EV) will continue to increase in the near future, and the investment will reach 221 billion US dollars by 2024. [0003] The average lifespan of lithium-ion batteries is 1-3 years, and the increasing number of lithium-ion batteries int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54H01M4/505
CPCH01M10/54H01M4/505Y02W30/84Y02E60/10
Inventor 欧星李东民季冠军张佳峰张宝
Owner 兰溪博观循环科技有限公司
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