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Biomimetic synthesis method of Fe3O4/Fe/C nano composite battery electrode material

A battery electrode, biomimetic synthesis technology, applied in battery electrodes, nanotechnology, nanotechnology and other directions, can solve the problems of poor cycle performance and rate performance, and achieve the effects of good rate performance, good cycle performance, and simple synthesis process

Inactive Publication Date: 2015-12-09
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the disadvantages of poor cycle performance and rate performance existing in existing iron oxide materials, the present invention provides an Fe 3 o 4 Biomimetic synthesis of / Fe / C nanocomposite battery electrode materials

Method used

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  • Biomimetic synthesis method of Fe3O4/Fe/C nano composite battery electrode material
  • Biomimetic synthesis method of Fe3O4/Fe/C nano composite battery electrode material
  • Biomimetic synthesis method of Fe3O4/Fe/C nano composite battery electrode material

Examples

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Effect test

Embodiment 1

[0040] a kind of Fe 3 o 4 The biomimetic synthesis method of / Fe / C nanocomposite battery electrode material, the preparation steps are as follows:

[0041] (1) Cut 3g of cotton into pieces with a length of 5mm and soak it in 45mL of sulfuric acid solution with a substance concentration of 15mol / L, keep it warm at 45°C for 40 minutes, separate the solid from the liquid, wash the solid with water until it is neutral, and place it at 60°C Drying at a lower temperature, the active nanocellulose is obtained, and the active nanocellulose is used as a biological template.

[0042] (2)) the active nanocellulose 1g that step (1) makes is soaked in the FeCl that 80ml concentration is 0.069mol / L 3 ·6H 2 In O aqueous solution, stir at room temperature for 2h, then add mass concentration 25wt% ammonia solution to adjust pH=8, form Fe(OH) 3 For the mixed precipitate with cellulose, the pH-adjusted mixed solution was hydrothermally treated at 180°C for 4 hours, separated from solid and l...

Embodiment 2

[0051] a kind of Fe 3 o 4 The biomimetic synthesis method of / Fe / C nanocomposite battery electrode material, the preparation steps are as follows:

[0052] (1) Cut 3 g of cotton into pieces with a length of 5 mm and soak them in 45 mL of sulfuric acid solution with a substance concentration of 15 mol / L, heat at 30°C for 60 minutes, separate the solid from the liquid, wash the solid with water until it is neutral, and place it at 60°C Drying at a lower temperature, the active nanocellulose is obtained, and the active nanocellulose is used as a biological template.

[0053] (2)) the active nanocellulose 1g that step (1) makes is soaked in the FeCl that 80ml concentration is 0.069mol / L 3 ·6H 2 In O aqueous solution, stir at room temperature for 2h, then add mass concentration 25wt% ammonia solution to adjust pH=8, form Fe(OH) 3 For the mixed precipitate with cellulose, the pH-adjusted mixed solution was hydrothermally treated at 160°C for 6 hours, separated from solid and liq...

Embodiment 3

[0057] a kind of Fe 3 o 4 The biomimetic synthesis method of / Fe / C nanocomposite battery electrode material, the preparation steps are as follows:

[0058] (1) Cut 3g of cotton into pieces with a length of 5mm and soak it in 45mL of sulfuric acid solution with a substance concentration of 15mol / L, heat it at 60°C for 30 minutes, separate the solid from the liquid, wash the solid with water until it is neutral, and place it at 60°C Drying at a lower temperature, the active nanocellulose is obtained, and the active nanocellulose is used as a biological template.

[0059] (2)) the active nanocellulose 1g that step (1) makes is soaked in the FeCl that 80ml concentration is 0.069mol / L 3 ·6H 2 In O aqueous solution, stir at room temperature for 2h, then add mass concentration 25wt% ammonia solution to adjust pH=8, form Fe(OH) 3 For the mixed precipitate with cellulose, the pH-adjusted mixed solution was hydrothermally treated at 200°C for 2 hours, separated from solid and liquid...

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Abstract

The invention relates to a biomimetic synthesis method of an Fe3O4 / Fe / C nano composite battery electrode material. The method comprises the following steps: firstly, preparing active nano cellulose from cheap natural cellulose cotton as a template and a carbon source, and then mixing the active nano cellulose with a FeCl3.6H2O water solution; adding ammonium hydroxide to generate sediments, and carrying out hydro-thermal treatment to form a mixture of a precursor Fe3O4 and the cellulose; and carrying out thermal treatment on the mixture in nitrogen atmosphere, so as to obtain the Fe3O4 / Fe / C nano composite material. The composite material prepared by the method can be used for preparing a power lithium-ion battery as a lithium battery anode material.

Description

technical field [0001] The present invention relates to a kind of iron oxide / iron / carbon (Fe 3 o 4 The invention discloses a biomimetic synthesis method for electrode materials of nano-composite batteries, belonging to the technical field of lithium-ion battery materials. Background technique [0002] Transition metal oxides, especially nano-scale transition metal oxides, have the advantages of abundant raw material sources, low cost, easy adjustment of the size (from nanometer to micron) and shape and positioning of metal oxide particles, and high theoretical energy density. Become an important lithium-ion battery anode material. [0003] Among the transition metal oxides, iron oxide has attracted great attention at home and abroad due to its high theoretical specific capacity, abundant natural reserves, and non-toxicity. It is considered to be a negative electrode material for lithium-ion batteries with great application potential. However, the volume of iron oxide chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/587H01M10/0525H01M4/36H01M4/52B82Y30/00
CPCB82Y30/00H01M4/362H01M4/38H01M4/523H01M4/587H01M10/0525Y02E60/10
Inventor 何文张旭东张书振
Owner QILU UNIV OF TECH
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