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Method for recovering and preparing lithium cobalt oxide by using disused lithium battery

A technology for lithium-ion batteries and used batteries, applied in battery recycling, waste collector recycling, recycling technology, etc., can solve the problems of difficult disposal of waste liquid, high equipment requirements, secondary pollution, etc., to solve the problem of cobalt resource scarcity , the effect is obvious, the effect of high recovery rate

Active Publication Date: 2010-03-17
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the environmental pollution caused by chemical reagents such as strong acid and strong alkali in the recycling process of waste lithium-ion batteries, the high requirements for equipment, the waste liquid is not easy to handle, and the secondary pollution is easy to occur. Natural organic acids are used instead of strong acids. Chemical reagents such as strong alkali provide an environmentally friendly method for preparing lithium cobaltate from waste lithium-ion batteries

Method used

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  • Method for recovering and preparing lithium cobalt oxide by using disused lithium battery
  • Method for recovering and preparing lithium cobalt oxide by using disused lithium battery
  • Method for recovering and preparing lithium cobalt oxide by using disused lithium battery

Examples

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Effect test

Embodiment 1

[0018] A lithium-ion battery that has a charge-discharge cycle life of 1000 cycles and has a good consistency is used in the experiment of preparing lithium cobaltate by recycling the waste lithium-ion battery of the present invention. After the de-energization treatment, the battery is mechanically cut and dissected, and the iron shell and electrode materials are disassembled. Treat the pulverized positive and negative electrodes with NMP, filter and collect the fluid. The recovered electrode active material was dried and then calcined in a muffle furnace at 700°C to obtain LiCoO 2 Crude product (LiCoO 2 、Co 3 o 4 , C powder), under the condition of 80 ℃, the obtained electrode material crude product is immersed in the citric acid solution of 1.25M, and the hydrogen peroxide of 1.0vol.%. Fully react under the condition of condensation, and obtain leachate after filtration. Determination of Li in solution by atomic absorption spectrophotometer + 、Co 2+ content. Add 120...

Embodiment 2

[0020] A lithium-ion battery that has a charge-discharge cycle life of 1000 cycles and has a good consistency is used in the experiment of preparing lithium cobaltate by recycling the waste lithium-ion battery of the present invention. After the de-energization treatment, the battery is mechanically cut and dissected, and the iron shell and electrode materials are disassembled. Treat the pulverized positive and negative electrodes with NMP, filter and collect the fluid. The recovered electrode active material was dried and then calcined in a muffle furnace at 700°C to obtain LiCoO 2 Crude product (LiCoO 2 、Co 3 o 4 , C powder), under the condition of 90 ℃, the obtained electrode material crude product is immersed in the malic acid solution of 1.5M, and the hydrogen peroxide of 0.5vol.%. Fully react under the condition of condensation, and obtain leachate after filtration. Determination of Li in solution by atomic absorption spectrophotometer + 、Co 2+ content. Add 120ml...

Embodiment 3

[0022] A lithium-ion battery that has a charge-discharge cycle life of 1000 cycles and has a good consistency is used in the experiment of preparing lithium cobaltate by recycling the waste lithium-ion battery of the present invention. After the de-energization treatment, the battery is mechanically cut and dissected, and the iron shell and electrode materials are disassembled. Treat the pulverized positive and negative electrodes with NMP, filter and collect the fluid. The recovered electrode active material was dried and then calcined in a muffle furnace at 700°C to obtain LiCoO 2 Crude product (LiCoO 2 、Co 3 o 4 , C powder), under the condition of 90 DEG C, the obtained electrode material crude product is immersed in 0.5M succinic acid solution, and 0.1vol.%.% of hydrogen peroxide is added, and the solid-liquid ratio is S: L=10g / L. After stirring and Fully react under the condition of condensation, and obtain leachate after filtration. Determination of Li in solution b...

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Abstract

The invention relates to a method for recovering and preparing lithium cobalt oxide by using a disused lithium battery, belonging to the technical field of recovery and recycle of electrode materials.The method comprises the steps of: discharging, disassembling, smashing, NMP processing and burning a disused lithium battery sequentially, to obtain a disused LiCoO2 material; ball-milling the disused LiCoO2 material and adding natural organic acid and hydrogen peroxide to obtain a solution of Li<+> and Co<2+>; adding lithium salt or cobalt salt after filtering, and then heating by water bath; dropwise adding ammonia water in the solution to prepare a xerogel; and performing secondary burning to obtain an electrode material of lithium cobalt oxide. The method has the advantages that the electrochemical properties of the electrode material of the disused lithium battery can be recycled with obvious effect as well as simple and easy operation; the natural organic acid used in the process of acid dipping has small damage to apparatus; and the method is environment friendly and efficient, and has low cost, simple technique, high recovery rate and industrialized promotion.

Description

technical field [0001] The invention relates to a method for preparing lithium cobaltate by recycling waste lithium ion batteries, and belongs to the technical field of recovery and recycling of electrode materials. Background technique [0002] With the rapid development of my country's economy, the effective and rational use of resources and environmental governance are imminent. my country is a big country in the production and consumption of primary batteries and secondary batteries. The rapid growth of various portable electronic products has formed a huge battery market. From the perspective of my country's energy strategy and security, the development of electric vehicles, especially hybrid vehicles, has been included in the relevant industrialization plan during the "Eleventh Five-Year Plan" period. The market share of power batteries is gradually increasing, and the resulting shortage of resources and environmental problems are becoming more and more serious. Ther...

Claims

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Application Information

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IPC IPC(8): H01M10/54C22B7/00C01D15/00C01G51/00
CPCY02E60/12Y02P10/20Y02W30/84
Inventor 李丽吴锋陈人杰葛静陈实吴伯荣
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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