Process for reserve recycling and preparation of lithium nickel cobaltate from waste lithium battery as raw material

A technology of waste lithium batteries and lithium nickel cobalt oxide, which is applied in battery recycling, waste collector recycling, battery electrodes, etc., to achieve the effects of resource utilization, enhanced migration ability, and improved discharge performance

Active Publication Date: 2013-11-20
GUANGDONG BRUNP RECYCLING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium-ion batteries are environmentally friendly during use, but in the near future, when the battery life ends, it will enter the scrapping stage. How to deal with waste lithium-ion batteries will become a new environmental protection issue

Method used

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  • Process for reserve recycling and preparation of lithium nickel cobaltate from waste lithium battery as raw material
  • Process for reserve recycling and preparation of lithium nickel cobaltate from waste lithium battery as raw material
  • Process for reserve recycling and preparation of lithium nickel cobaltate from waste lithium battery as raw material

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Effect test

Embodiment 1

[0035] A process for preparing lithium nickel cobalt oxide by reverse recovery of waste lithium batteries as raw materials, comprising the following steps:

[0036] (1) The battery cell was disassembled, and the positive electrode sheet was taken out; the positive electrode sheet was crushed, pyrolyzed in air at 400°C, and sieved with a 60-mesh standard sieve under vibration to obtain 1839 g of positive electrode powder.

[0037] (2) Dissolve the positive electrode powder in 10L2mol / L nitric acid, remove the insoluble matter by filtration, control the pH of the filtrate to 2, add 20L extractant, the components of the extractant are P204 with a volume fraction of 30% and P204 with a volume fraction of 70%. Sulfonated kerosene, the equilibrium time is 15min, then back extraction with 10L2mol / L nitric acid, the equilibrium time is 15min, the obtained solution is a mixed solution of nickel nitrate and cobalt nitrate, and the nickel ion concentration in the solution recorded by ICP ...

Embodiment 2

[0045] A process for preparing lithium nickel cobalt oxide by reverse recovery of waste lithium batteries as raw materials, comprising the following steps:

[0046] (1) The battery cell was disassembled, and the positive electrode sheet was taken out; the positive electrode sheet was crushed, pyrolyzed, and sieved with a 60-mesh standard sieve under vibration to obtain 1870 g of positive electrode powder.

[0047] (2) Dissolve the positive electrode powder in 10L2mol / L hydrochloric acid, remove the insoluble matter by filtration, control the pH of the filtrate to 2, add 20L extractant, the components of the extractant are P204 with a volume fraction of 30% and P204 with a volume fraction of 70%. Sulfonated kerosene, the equilibrium time is 15min, back extraction with 10L2mol / L hydrochloric acid, the equilibrium time is 15min, the obtained solution is a mixed solution of nickel chloride and cobalt chloride, and the nickel ion concentration in the solution is 0.70mol / L, the cob...

Embodiment 3

[0054] A process for preparing lithium nickel cobalt oxide by reverse recovery of waste lithium batteries as raw materials, comprising the following steps:

[0055] (1) The battery cell was disassembled, and the positive electrode sheet was taken out; the positive electrode sheet was crushed, pyrolyzed, and sieved with a 60-mesh standard sieve under vibration to obtain 1920 g of positive electrode powder.

[0056] (2) Dissolve the positive electrode powder in 10L2mol / L sulfuric acid, remove the insoluble matter by filtration, control the pH of the filtrate to 2, add 20L extractant, the components of the extractant are P204 with a volume fraction of 30% and P204 with a volume fraction of 70%. Sulfonated kerosene, the equilibrium time is 15min, then back extraction with 10L2mol / L sulfuric acid, the equilibrium time is 15min, the obtained solution is a mixed solution of nickel sulfate and cobalt sulfate, the nickel ion concentration in the solution is 0.82mol / L measured by ICP, T...

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Abstract

The invention discloses a process for reserve recycling and preparation of lithium nickel cobaltate from a waste lithium battery as a raw material, and belongs to the field of waste lithium battery recycling. According to the process disclosed by the invention, an anode material of the waste lithium ion battery is recycled, a new lithium nickel cobaltate anode material is synthesized by means of a reserve recycling process, the regenerated anode material meets the performance requirements for native products, and resource utilization is achieved; the prepared primary product of lithium nickel cobaltate is treated by using a reducing metal powder so that the obtained lithium nickel cobaltate has oxygen vacancy; LiNixCo1-xO2-y is obtained, wherein x is not less than 0.33 and not more than 0.67, and y is not less than 0.05 and not more than 0.5; the oxygen vacancy can be used for enhancing the migration capacity of lithium ions in the lithium nickel cobaltate crystal structure and enhancing the discharge capacity of the battery. The reducing metal powder adopted by the process disclosed by the invention has the advantages that the synthesis process can be simplified and the cost for preparing the oxygen vacancy can be reduced.

Description

technical field [0001] The invention belongs to the field of waste lithium battery recycling, in particular to a process for preparing nickel-cobalt lithium lithium by reverse recycling using waste lithium batteries as raw materials. Background technique [0002] With the continuous development of digital products and electric vehicles, people's demand for batteries is increasing. Lithium-ion battery is one of the alternative environment-friendly secondary batteries. It is widely used in mobile phones, digital cameras, electric vehicles and other fields, and has a great market demand. Lithium-ion batteries are environmentally friendly during use, but in the near future, when the battery life ends, it will enter the scrapping stage. How to deal with used lithium-ion batteries will become a new environmental protection issue. [0003] Waste lithium-ion battery cathode materials can be recycled and made into metal powder, metal oxides, chemical salts, etc., but the best recycl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1397H01M10/54
CPCY02E60/122Y02E60/10Y02W30/84
Inventor 欧彦楠李长东余海军
Owner GUANGDONG BRUNP RECYCLING TECH
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