Method for recovering and preparing nano-cobalt oxide from waste lithium ion battery

A lithium-ion battery, nano-cobalt oxide technology, applied in battery recycling, cobalt oxide/cobalt hydroxide, nanotechnology and other directions, can solve problems such as high equipment anti-corrosion requirements, environmental hazards, atmospheric environmental pollution, etc., and achieve a simple and feasible preparation process. Effect

Inactive Publication Date: 2005-03-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disposal of scrapped lithium-ion batteries usually faces the following problems: First, the surfaces of the positive and negative electrodes of scrapped lithium-ion batteries usually contain a small amount of elemental lithium. Since metallic lithium in the elemental state is highly flammable and explosive, This is a safety issue that requires special attention in battery disposal; in addition, cobalt is a heavy metal that can be harmful to the environment if not handled properly
However, the above methods still have certain deficiencies: First, the method of incineration to remove organic matter needs to be equipped with flue gas purification equipment, otherwise it will easily cause air pollution; in addition, under the condition of heating, the "residual powder" is dissolved with hydrochloric acid to prevent corrosion of the equipment High requirements and harsh operating environment

Method used

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Examples

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example 1

[0018] Take 10 batteries with a single weight of 28g, cut the battery in water, separate the positive electrode material from other components, cut the positive electrode material into pieces smaller than 2cm×2cm in size, put these pieces into 500ml at room temperature, mass In NaOH solution with a concentration of 40%, react until no bubbles are seen, filter, collect the filtrate for other purposes, dry the filter residue under infrared light, then grind it into powder, pass through an 80-mesh sieve, and use the same Concentration and ratio of lye dissolved once, filtered, the obtained filter residue contains LiCoO 2 The mixture; at room temperature, with 400ml, the mass concentration is 30% HNO 3 solution to dissolve the mixture and filter to obtain a solution of Co 2+ , Li + The nitrate solution; the above nitrate solution is added dropwise to 400ml, and the mass concentration is 30% NaOH solution, and the pH is adjusted to 9~11 to obtain small blue Co(OH) 2 Precipitatio...

example 2

[0020] Take 10 batteries with a single weight of 28g, cut the battery in water, separate the positive electrode material from other parts, cut the positive electrode material into pieces smaller than 2cm×2cm in size, put these pieces into 800ml at room temperature, mass Concentration is 20% NaOH solution, react until no bubbles can be seen, filter, collect the filtrate for other use, dry the filter residue under infrared lamp, then grind it into powder, pass through 80 mesh sieve, and use the same Concentration and ratio of lye dissolved once, filtered, the obtained filter residue contains LiCoO 2 The mixture; at room temperature, with 800ml, the mass concentration is 20% HNO 3 solution to dissolve the mixture and filter to obtain a solution of Co 2+ , Li + nitrate solution; the above nitrate solution is added dropwise to 500ml, and the mass concentration is 20% in NaOH solution, and the pH is adjusted to 9~11 to obtain small blue Co(OH) 2 Precipitation, Co(OH) 2 Precipita...

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Abstract

The invention discloses a method for recovering and preparing nano-cobalt oxide from waste lithium ion battery which comprises the steps of, cutting the battery, alkaline pickling the Al foil with excess NaOH at room temperature, reacting, filtering to obtain LiCoO2-containing filtering deposit, dissolving the mixture with HNO3 at room temperature, dropping the nitrate solution into NaOH solution, adjusting the pH value to 9-11, thus obtaining fine Co(OH)2 sediment, converting it into hydrated cobalt oxide, removing the foreign ions through filtration and washing, drying the CoO(OH) under infrared lamp, thermal treatment 2h, thus obtaining Co3O4 nano powder.

Description

technical field [0001] The invention relates to a method for recovering and preparing nano-cobalt oxide from discarded lithium-ion batteries, which belongs to the technology of chemical separation and preparation of inorganic nano-powder. Background technique [0002] Lithium-ion battery cathode material is made of active material LiCoO 2 , carbon black, acetylene black, and binder adhered to the aluminum foil in a certain proportion, the content of each part of the positive electrode material is shown in Table 1: [0003] substance LiCoO 2 carbon black, acetylene black binder aluminum foil Content (wt.%) 76.80 9.03 4.52 9.65 [0004] The disposal of scrapped lithium-ion batteries usually faces the following problems: First, the surfaces of the positive and negative electrodes of scrapped lithium-ion batteries usually contain a small amount of elemental lithium. Since metallic lithium in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B82B3/00C01G51/04
CPCY02W30/84
Inventor 梁辉冯胜雷
Owner TIANJIN UNIV
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