Method for simultaneously preparing nano material and recycling lithium salt by using waste lithium ion battery

A lithium-ion battery and nanomaterial technology, applied in the field of resource recycling, can solve the problems of single metal oxide structure and limited application of energy storage, and achieve the effects of avoiding secondary pollution, easy industrial application, and saving recycling costs

Pending Publication Date: 2022-05-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common methods for synthesizing metal oxides include hydrothermal method, chemical precipitation method, template method, electrodeposition and vapor deposition method, but the metal oxides synthesized by these methods have a single structure, and most of them are lamellar structures. Storage, catalysis and other applications are limited

Method used

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  • Method for simultaneously preparing nano material and recycling lithium salt by using waste lithium ion battery
  • Method for simultaneously preparing nano material and recycling lithium salt by using waste lithium ion battery
  • Method for simultaneously preparing nano material and recycling lithium salt by using waste lithium ion battery

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Embodiment 1

[0054] This embodiment provides a method for preparing nanomaterials by utilizing waste lithium ion batteries. The lithium ion batteries are waste lithium cobalt oxide batteries, and the metal element composition of the positive electrode material is shown in Table 1.

[0055] Table 1 Composition of Metal Elements in Cathode Material of Waste Lithium Cobalt Oxide Battery

[0056] Metal Li Al Ni co mn Content, wt% 6.81 0.52 0.03 59.23 0.01

[0057] The method comprises the steps of:

[0058] (1) After mixing the positive electrode material of lithium cobaltate battery and cobalt sulfate at a molar ratio of 2:1, roasting treatment in an air atmosphere at 500°C for 6 hours;

[0059] (2) leaching the roasted product obtained in step (1) with deionized water, and obtaining a transition metal oxide nanomaterial and a lithium-rich solution after filtration and separation;

[0060] (3) The lithium-rich leaching solution obtained in step (2) is concen...

Embodiment 2

[0063] This embodiment provides a method for preparing nanomaterials using waste lithium-ion batteries, the type of the lithium-ion batteries and the composition of the positive electrode material are the same as those in Example 1.

[0064] The method comprises the steps of:

[0065] (1) After mixing the positive electrode material of lithium cobaltate battery and manganese sulfate at a molar ratio of 2:1, roasting treatment for 6 hours in an argon atmosphere at 500°C;

[0066] (2) leaching the roasted product obtained in step (1) with deionized water, and obtaining a transition metal oxide nanomaterial and a lithium-rich solution after filtration and separation;

[0067] (3) Into the lithium-rich leaching solution obtained in step (2) with 5L min -1 Carbon dioxide is introduced at a certain rate, and lithium carbonate is precipitated.

[0068] In the present embodiment, through inductively coupled plasma emission spectroscopy (ICP-OES) detection, the recovery rate of lithi...

Embodiment 3

[0070] This embodiment provides a method for preparing nanomaterials using waste lithium-ion batteries, the type of the lithium-ion batteries and the composition of the positive electrode material are the same as those in Example 1.

[0071] The method comprises the steps of:

[0072] (1) After mixing the positive electrode material of lithium cobalt oxide battery and nickel sulfate at a molar ratio of 2:1, roasting treatment in an air atmosphere at 600°C for 1 hour;

[0073] (2) leaching the roasted product obtained in step (1) with deionized water, and obtaining a transition metal oxide nanomaterial and a lithium-rich solution after filtration and separation;

[0074] (3) The lithium-rich leaching solution obtained in step (2) is concentrated by evaporation to obtain lithium sulfate.

[0075] In this embodiment, through inductively coupled plasma emission spectroscopy (ICP-OES) detection, the recovery rate of lithium in step (3) is calculated to be 98.9%; through X-ray diff...

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Abstract

The invention discloses a method for preparing a nano material by using a waste lithium ion battery. The method comprises the following steps: mixing the waste lithium ion battery positive electrode material with an additive, and roasting; and washing the roasted product to obtain the transition metal oxide nano material, and preparing the lithium salt from the lithium-rich solution. Through a low-temperature roasting method, transition metal nano materials such as nickel, cobalt, iron and manganese can be selectively prepared, and lithium resources in the positive electrode material of the lithium ion battery are enriched at the same time; the method disclosed by the invention has the characteristics of simple preparation steps, mild reaction conditions, easiness in control, regular morphology of the prepared product and the like; and the method has important significance on large-scale industrial production of nickel, manganese, iron and cobalt oxides with nano structures and high-value utilization of waste lithium ion batteries.

Description

technical field [0001] The invention belongs to the field of resource recovery and utilization technology and chemical material preparation, and in particular relates to a method for simultaneously preparing nanomaterials and recovering lithium salts by utilizing waste lithium ion batteries Background technique [0002] As a new energy storage technology, lithium-ion battery is developing at an unprecedented speed. Especially in the field of electric vehicles, it has experienced leapfrog development in terms of technology and market share. With the expansion of the electric vehicle market, the consumption of lithium-ion batteries will increase sharply, and after the service of lithium-ion batteries is over, its subsequent reasonable treatment is an urgent problem to be solved. On the one hand, the inherent toxicity of battery materials is harmful to the environment. For example, when the electrode materials of lithium-ion batteries enter the environment, it may cause heavy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00C01G51/04C01G53/00H01M10/54C01D15/06C01D15/08B82Y40/00B82Y30/00
CPCC01G51/04C01D15/06C01D15/08C01G51/44C01G53/00H01M10/54B82Y30/00B82Y40/00C01P2006/80Y02W30/84
Inventor 李丽林娇范二莎陈人杰吴锋
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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