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A method for preparing lithium-doped cobalt ferrite material using waste lithium battery as raw material

A technology of waste lithium battery and cobalt ferrite, applied in the field of lithium battery, can solve the problems of serious secondary pollution, low product added value, complicated process, etc., and achieve the effects of reducing harm, improving application value, and simple and fast preparation process

Active Publication Date: 2017-10-17
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, scholars at home and abroad have done a lot of research work on the recycling of waste lithium-ion batteries, but there are obvious shortcomings such as complex process, serious secondary pollution, high cost, and low added value of products. From the perspective of the composition of ion batteries, it contains a large amount of cobalt and iron, which is exactly the reason for the preparation of high value-added cobalt ferrite CoFe 2 o 4 main material

Method used

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  • A method for preparing lithium-doped cobalt ferrite material using waste lithium battery as raw material
  • A method for preparing lithium-doped cobalt ferrite material using waste lithium battery as raw material
  • A method for preparing lithium-doped cobalt ferrite material using waste lithium battery as raw material

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Embodiment 1

[0033] A method for preparing a lithium-doped cobalt ferrite material using waste lithium batteries as a raw material, which specifically includes the following steps:

[0034] (1) Dismantling: dismantling the waste lithium battery to obtain the positive electrode sheet material, that is, the aluminum foil containing the positive electrode material, and the negative electrode sheet material, that is, the copper foil containing the negative electrode material;

[0035] (2), separation of positive electrode sheet material: take 16g of positive electrode sheet material, adopt the nitric acid that mass concentration is 10% to carry out impregnation completely at normal temperature for 30min, take out the positive electrode sheet after impregnating with tweezers, put it in the beaker and use Immerse in ionized water, place the beaker in an ultrasonic cleaning device, adjust the ultrasonic frequency to 45KHz, adjust the temperature to 60°C, and adjust the time to 45min. After ultraso...

Embodiment 2

[0042] A method for preparing a lithium-doped cobalt ferrite material using waste lithium batteries as a raw material, which specifically includes the following steps:

[0043] (1) Dismantling: dismantling the waste lithium battery to obtain the positive electrode sheet material, that is, the aluminum foil containing the positive electrode material, and the negative electrode sheet material, that is, the copper foil containing the negative electrode material;

[0044] (2), separation of positive electrode sheet material: take 16g of positive electrode sheet material, adopt the nitric acid that mass concentration is 10% to carry out impregnation completely at normal temperature for 30min, take out the positive electrode sheet after impregnating with tweezers, put it in the beaker and use Immerse in ionized water, place the beaker in an ultrasonic cleaning device, adjust the ultrasonic frequency to 45KHz, adjust the temperature to 60°C, and adjust the time to 45min. After ultraso...

Embodiment 3

[0050] A method for preparing a lithium-doped cobalt ferrite material using waste lithium batteries as a raw material, which specifically includes the following steps:

[0051] (1) Dismantling: dismantling the waste lithium battery to obtain the positive electrode sheet material, that is, the aluminum foil containing the positive electrode material, and the negative electrode sheet material, that is, the copper foil containing the negative electrode material;

[0052] (2), separation of positive electrode sheet material: take 16g of positive electrode sheet material, adopt the nitric acid that mass concentration is 10% to carry out impregnation completely at normal temperature for 30min, take out the positive electrode sheet after impregnating with tweezers, put it in the beaker and use Immerse in ionized water, place the beaker in an ultrasonic cleaning device, adjust the ultrasonic frequency to 45KHz, adjust the temperature to 60°C, and adjust the time to 45min. After ultraso...

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Abstract

The invention discloses a method for preparing a lithium-doped cobalt ferrite material by employing a waste lithium battery as a raw material. The method comprises the following steps: soaking a cathode plate of a lithium battery with nitric acid at a room temperature for half an hour, taking out the cathode plate by virtue of tweezers, and carrying out ultrasonic washing to obtain a cathode material; weighing a certain mass of cathode material, grinding the cathode material in a mortar for half an hour, putting the powder into a crucible, burning the crucible in a high-temperature box-type resistance furnace, carrying out heat preservation, naturally cooling the crucible, and taking out the sample for weighing; and weighing a certain amount of sintered sample, fully mixing the sample with Fe2O3, grinding the mixture in the mortar for half an hour, sintering the mixture in a microwave sintering furnace, carrying out heat preservation, and naturally cooling the mixture, so as to obtain the product. The method is simple in technology, short in production cycle, high in temperature rise rate, short in heating time and low in sintering temperature; meanwhile, metal ions in the waste lithium battery are reasonably utilized to reach the effects of protecting the environment and recovering resources; and in addition, the prepared ferrite material has relatively good performance and considerable economic benefit.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a method for preparing lithium-doped cobalt ferrite materials by using waste lithium batteries as raw materials. Background technique [0002] With the development of microelectronics technology, miniaturized equipment is increasing day by day. Lithium batteries are everywhere in mobile phones, notebook computers, power tools, backup power supplies for street lights, navigation lights, small household appliances, etc. With the advantages of large reserves, light weight, rechargeable, non-polluting (no heavy metal cadmium), lithium batteries quickly eliminated nickel-cadmium, nickel-metal hydride and other battery technologies and dominated the market. At present, China is the world's largest lithium battery production and manufacturing base, the second largest lithium battery producer and exporter, and lithium battery products have accounted for 40% of the g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54C22B7/00
CPCC22B7/004H01M10/54Y02P10/20Y02W30/84
Inventor 刘银黄关火张世鹏于冲邢海辉
Owner ANHUI UNIV OF SCI & TECH
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