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A kind of preparation method of silver-doped ferric oxide nanocomposite material

A nanocomposite material, ferric oxide technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of poor cycle performance and rate performance, high volume change rate, etc. Achieve the effect of improving rate performance, alleviating volume change and improving stability

Active Publication Date: 2021-08-13
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still problems to be solved when ferric iron tetroxide is used as the negative electrode material of lithium-ion batteries. In the process of deintercalating lithium, the volume change rate is high, and it is easy to agglomerate and pulverize, and then the cycle performance and rate performance gradually deteriorate.

Method used

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  • A kind of preparation method of silver-doped ferric oxide nanocomposite material
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  • A kind of preparation method of silver-doped ferric oxide nanocomposite material

Examples

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Effect test

Embodiment 1

[0040] (1) Using silver nitrate, ferric chloride hexahydrate and anhydrous sodium acetate in a molar ratio of 1:10:70, weigh 2.6g of ferric chloride hexahydrate and dissolve it in 30ml of ethylene glycol, and weigh 6.2g of ferric chloride without Sodium acetate water was dissolved in 40ml of ethylene glycol, and 0.17g of silver nitrate was weighed and dissolved in 10ml of ethylene glycol. After magnetic stirring for 0.5 h respectively, the three were mixed and magnetic stirring was continued for 1 h. Then transfer to a 100ml reactor, and react at 200°C for 10h. Then separate, wash and dry to obtain silver-doped ferric oxide nanocomposite material.

[0041] (2) Using a mass ratio of 7:2:1, weigh 70 mg ferric oxide nanocomposite material and 20 mg conductive carbon superC45, mix and grind. Take another small glass bottle, weigh carboxymethylcellulose sodium (CMC) and acrylonitrile multi-polymer (LA133) with a mass ratio of 1:1, and add water and ethanol as solvent. Add the gr...

Embodiment 2

[0044] (1) Using silver nitrate, ferric chloride hexahydrate and anhydrous sodium acetate in a molar ratio of 1:5:35, weigh 2.6g of ferric chloride hexahydrate and dissolve it in 30ml of ethylene glycol, and weigh 6.2g of Sodium acetate water was dissolved in 40ml of ethylene glycol, and 0.34g of silver nitrate was weighed and dissolved in 10ml of ethylene glycol. After magnetic stirring for 0.5 h respectively, the three were mixed and magnetic stirring was continued for 1 h. Then transfer to a 100ml reactor, and react at 200°C for 10h. Then separate, wash and dry to obtain silver-doped ferric oxide nanocomposite material.

[0045] (2) Using a mass ratio of 7:2:1, weigh 70 mg ferric oxide nanocomposite material and 20 mg conductive carbon superC45, mix and grind. Take another small glass bottle, weigh carboxymethylcellulose sodium (CMC) and acrylonitrile multi-polymer (LA133) with a mass ratio of 1:1, and add water and ethanol as solvent. Add the ground nanocomposite materi...

Embodiment 3

[0048] (1) Using silver nitrate, ferric chloride hexahydrate and anhydrous sodium acetate in a molar ratio of 1:5:90, weigh 1.3g of ferric chloride hexahydrate and dissolve it in 30ml of ethylene glycol, and weigh 8.2g of ferric chloride without Sodium acetate water was dissolved in 40ml of ethylene glycol, and 0.17g of silver nitrate was weighed and dissolved in 10ml of ethylene glycol. After magnetic stirring for 0.5 h respectively, the three were mixed and magnetic stirring was continued for 1 h. Then transfer to a 100ml reactor, and react at 200°C for 10h. Then separate, wash and dry to obtain silver-doped ferric oxide nanocomposite material.

[0049] (2) Using a mass ratio of 7:2:1, weigh 70 mg ferric oxide nanocomposite material and 20 mg conductive carbon superC45, mix and grind. Take another small glass bottle, weigh carboxymethylcellulose sodium (CMC) and acrylonitrile multi-polymer (LA133) with a mass ratio of 1:1, and add water and ethanol as solvent. Add the gro...

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Abstract

The invention discloses a preparation method of a silver-doped iron ferric oxide nanocomposite material, belonging to the technical field of lithium ion battery electrode materials. The preparation method is as follows: taking ferric trichloride hexahydrate, anhydrous sodium acetate and silver nitrate as raw materials, adding ethylene glycol as a reducing agent, and carrying out the reaction in a high-pressure reactor. Then the product is separated, washed and dried to obtain silver-doped ferric oxide nanocomposite material. The material of the invention is applied to the negative electrode of the lithium ion battery, which not only improves the conductivity of the material, but also effectively alleviates the volume expansion, ensures excellent cycle performance and rate performance, and enables the composite material to achieve long cycle stability. It is a lithium-ion battery negative electrode material with simple process flow, safety, environmental protection and large-scale production potential.

Description

technical field [0001] The invention belongs to the field of lithium-ion battery electrode materials, and in particular relates to a preparation method and application of a silver-doped iron ferric oxide nanocomposite material as a lithium-ion battery negative electrode material. Background technique [0002] Facing the dual problems of fossil energy depletion and environmental degradation, the sustainable new energy industry has come into our field of vision. As a rechargeable secondary battery, lithium-ion batteries have been widely used in electronic communications, electric vehicles, solar energy storage, etc. At the same time, their advantages such as high voltage, high energy density, high safety, and low self-discharge rate make The research of lithium ion battery cannot be ignored, it is a kind of energy storage element with high efficiency, practical and environmental protection. At present, the focus and difficulty of research on lithium-ion battery anode material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/525H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCY02E60/10
Inventor 孙蔷张雪
Owner NORTHEASTERN UNIV LIAONING