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Method for recycling lithium nickel cobalt manganese oxide ternary positive electrode material of retired lithium-ion power battery

A technology for nickel-cobalt lithium manganate and lithium-ion batteries, which is applied in the field of recycling and reuse of nickel-cobalt lithium manganate ternary positive electrode materials for retired lithium-ion power batteries, and can solve the problems of complicated operation, high cost and low metal recovery rate of the treatment method. problem, to achieve the effect of simple recovery method process, less compounds, and high purity of by-products

Inactive Publication Date: 2019-05-03
郑州中科新兴产业技术研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on the technical problems existing in the background technology, the present invention provides a method for recovering and reusing nickel-cobalt-lithium-manganese-oxide ternary positive electrode materials of decommissioned lithium-ion power batteries, which solves the problem of complex operation, high cost and low metal recovery rate of the processing methods in the prior art. Technical problems of polluting the environment

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  • Method for recycling lithium nickel cobalt manganese oxide ternary positive electrode material of retired lithium-ion power battery
  • Method for recycling lithium nickel cobalt manganese oxide ternary positive electrode material of retired lithium-ion power battery
  • Method for recycling lithium nickel cobalt manganese oxide ternary positive electrode material of retired lithium-ion power battery

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Embodiment 1

[0027] In this embodiment, the method for recycling the nickel-cobalt lithium manganate ternary positive electrode material of the decommissioned lithium-ion power battery comprises the following steps:

[0028] (1) Cut the positive pole piece of the waste nickel-cobalt-lithium manganese oxide battery obtained from dismantling into pieces of about 2*3cm in size;

[0029] (2) Configure a dilute sulfuric acid solution with a concentration of 0.5mol / L, put in crushed positive electrode pieces according to the ratio of solid to liquid ratio of 1:10, mechanical stirring speed of 180r / min, and add ultrasonic cleaning, react for about 30 minutes, and sort out Aluminum foil, then add sulfuric acid with 10% of the pole piece weight, heat at 50°C and stir for 40 minutes, then add ammonia water dropwise to the reaction solution to adjust the pH of the solution to 5, filter and wash, add barium acetate solution dropwise to the filtrate until complete precipitation , to obtain a transparen...

Embodiment 2

[0033] In this embodiment, the method for recycling the nickel-cobalt lithium manganate ternary positive electrode material of the decommissioned lithium-ion power battery comprises the following steps:

[0034] (1) Cut the positive pole piece of the waste nickel-cobalt-lithium manganese oxide battery obtained from dismantling into pieces of about 2*3cm in size;

[0035] (2) Configure a dilute sulfuric acid solution with a concentration of 0.4mol / L, put in the broken positive electrode sheet according to the ratio of solid to liquid ratio of 1:12, mechanical stirring speed of 180r / min, and add ultrasonic cleaning, react for about 50 minutes, and sort out Aluminum foil, then add sulfuric acid with 10% of the pole piece weight, heat at 60°C and stir for 40 minutes, then add ammonia water dropwise to the reaction solution to adjust the pH of the solution to 5, filter and wash, add barium acetate solution dropwise to the filtrate until complete precipitation , to obtain a transpar...

Embodiment 3

[0039] In this embodiment, the method for recycling the nickel-cobalt lithium manganate ternary positive electrode material of the decommissioned lithium-ion power battery comprises the following steps:

[0040](1) Cut the positive pole piece of the waste nickel-cobalt-lithium manganese oxide battery obtained from dismantling into pieces of about 2*3cm in size;

[0041] (2) Configure a dilute sulfuric acid solution with a concentration of 0.6mol / L, put in the broken positive electrode sheet according to the ratio of solid to liquid ratio of 1:9, mechanical stirring speed of 200r / min, and add ultrasonic cleaning, react for about 30 minutes, and sort out Aluminum foil, then add sulfuric acid with 10% of the pole piece weight, heat at 70°C and stir for 40 minutes, then add ammonia water dropwise to the reaction solution to adjust the pH of the solution to 5, filter and wash, add barium acetate solution dropwise to the filtrate until complete precipitation , to obtain a transparen...

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Abstract

The invention belongs to the technical field of lithium battery material recovery, and particularly relates to a method for recycling a lithium nickel cobalt manganese oxide ternary positive electrodematerial of a retired lithium-ion power battery. The method comprises the following steps: (1) carrying out discharging, disassembling and sorting on a waste ternary lithium-ion battery, soaking thepositive plate with dilute acid, carrying out cooperative mechanical stirring and ultrasonic cleaning, and separating out a current collector; (2) removing impurities, carrying out filtering, and regulating and controlling the ion proportion of the leachate; (3) carrying out spray drying, and then carrying out stepped high-temperature calcination to obtain the Lithium nickel cobalt manganese oxideternary positive electrode material. According to the invention, the purpose of separating the current collector and the battery material is achieved through a dilute acid leaching-stirring cleaningmethod, and separation efficiency reaches 99% or above; Al and Fe impurity ions are removed by regulating and controlling the pH value through ammonia water; and influence of SO4<2-> ions can be removed by adding barium acetate. The recycling method disclosed by the invention is simple in process, few compounds are introduced in the process, purity of by-products is high, the process is green andpollution-free, and the method is suitable for industrial popularization.

Description

technical field [0001] The invention belongs to the field of lithium ion battery material recovery, and in particular relates to a recovery and reuse method for nickel-cobalt lithium manganate ternary positive electrode material of decommissioned lithium-ion power batteries. Background technique [0002] New energy vehicles have shown explosive growth under the guidance of national policies. In 2016, the sales volume of new energy vehicles in China reached 507,000, making it the largest new energy vehicle market in the world. New energy vehicles have the advantage of coping with environmental pollution and energy shortages. However, power batteries cannot be effectively recycled after they are scrapped, which will cause environmental pollution and waste of resources. According to the calculations of authoritative organizations, for ternary material power batteries, the market size created by recycling metals such as cobalt, nickel, manganese, lithium, iron and aluminum from...

Claims

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Application Information

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IPC IPC(8): C01G53/00C01F11/46H01M10/54H01M4/525H01M4/505H01M10/0525
CPCY02E60/10Y02W30/84
Inventor 刘艳侠张锁江柴丰涛马立彬侯奥林李晶晶张鹏飞
Owner 郑州中科新兴产业技术研究院
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