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Method for separating and recovering cobalt from waste lithium ion cell

A lithium-ion battery, separation and recycling technology, applied in battery recycling, waste collector recycling, recycling technology and other directions, can solve problems such as environmental impact and complex process, achieve high purity and recovery rate, and simple operation.

Inactive Publication Date: 2005-10-26
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned method is complex in process and has an impact on the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The method for separating and recovering cobalt from waste lithium-ion batteries is to physically disassemble the waste lithium-ion batteries after fully discharging to obtain a positive electrode material containing lithium cobaltate, which is heated to 500°C and kept at a constant temperature for 20 minutes to remove the organic binder and The aluminum sheet was peeled off while hot to obtain a black solid material containing lithium cobaltate. Weigh 100 g of the black solid material containing lithium cobaltate, add 2 L of sulfuric acid reaction medium with a concentration of 1.5 mol / L, and then add 200 ml of 30% H 2 o 2 As a reducing agent, stir at 60°C for 2 hours, dissolve lithium cobaltate, the positive electrode material of the spent lithium-ion battery, and filter. Heat the filtrate to 70°C, slowly add NaOH solution with a concentration of 40% under rapid stirring to make the pH of the system 9 to 10, and after standing for 1 hour, filter by decantation to obt...

Embodiment 2

[0020] The method for separating and recovering cobalt from waste lithium-ion batteries includes fully discharging the waste lithium-ion batteries, immersing them in acetone, an organic solvent, to dissolve organic adhesives, peeling off aluminum flakes to obtain a black solid material containing lithium cobaltate. Weigh 80g of the black solid material containing lithium cobaltate, add 1.6L of 1.5mol / L sulfuric acid reaction medium, add 48.0g of Na 2 S 2 o 3 ·5H 2 The O solid is a reducing agent, stirred at 80° C. for 3 hours to dissolve the positive electrode material lithium cobaltate in the waste lithium ion battery, and filter. Heat the filtrate to 85°C, slowly add NaOH solution with a concentration of 40% under rapid stirring to make the pH of the system 9 to 10, and after standing for 2 hours, filter by decantation to obtain Co(OH) 2 Precipitate and lithium-containing filtrate. The lithium-containing filtrate is treated with carbonate, and lithium is recovered by pre...

Embodiment 3

[0022] The method for separating and recovering cobalt from waste lithium ion batteries comprises the steps:

[0023] 1). After discharging the waste lithium-ion battery, perform physical disassembly to obtain the positive electrode material containing lithium cobalt oxide; heat the positive electrode material containing lithium cobalt oxide to 400°C and keep the temperature for 30 minutes to remove the organic binder and peel off the aluminum sheet Obtain a black solid material containing lithium cobaltate;

[0024] 2). Adding a sulfuric acid reaction medium with a concentration of 1.0mol / L in the black solid material containing lithium cobaltate, the addition of the sulfuric acid reaction medium is 30 times the quality of the black solid material containing lithium cobaltate; then Add 30% H 2 o 2 Reducing agent, concentration 30% H 2 o 2 The amount added is 1.0 times the mass of the black solid material containing lithium cobaltate, stirred at 60°C to 90°C for 2 hours an...

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Abstract

This invention relates to a method for separating and recovering Co from the positive material lithium cobaltate of waste Li ionic batteries discharging of the battery to get a positive material containing lithium cobaltate to be annealed or dipped by an organic solvent to strip Al plates of the positive material to get a black solid material containing lithium cobaltate to be put under an acid condition and take H2O2 or Na2S2O3 as the reducer to be heated and dissolved to get a solution with Co2+ and Li+, then take NaOH solution as the precipitant to transfer the iron Co2+ to Co(OH)2 to be deposited and filtered after settlement.

Description

technical field [0001] The invention relates to a method for separating and recovering cobalt from lithium cobalt oxide, a cathode material of a waste lithium ion battery. Background technique [0002] Since the commercial production of lithium-ion batteries in 1990, they have been widely used due to their small size, light weight, large power storage capacity, fast charging speed, wide temperature range, long working hours and long cycle life. Used in cameras, mobile phones, notebook computers, and portable measuring instruments. It is also the preferred light and high-energy power source for electric vehicles in the future. The positive electrode material of the lithium-ion battery is composed of a pure aluminum foil (thickness about 0.01mm) and a black positive electrode active material coating (thickness about 0.08mm) as a current collector. The black coating contains 88% of the positive electrode active material lithium cobaltate, 8% acetylene black conductive agent a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCY02E60/12Y02W30/84
Inventor 郭丽萍黄志良雷家珩童辉杜小弟方伟
Owner WUHAN UNIV OF TECH
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