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A kind of ferroferric oxide/carbon composite negative electrode material and its preparation method and application

A technology for negative electrode materials and porous materials, applied in the field of electrode materials, ferroferric oxide/carbon composite negative electrode materials and their preparation, can solve the problems of complex process and long process, and achieve simple process, mild synthesis conditions and uniform pore size distribution Effect

Active Publication Date: 2021-01-29
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process of this method is complicated, the process is long, and the negative electrode material prepared is a lithium ion battery negative electrode material, which is not suitable for sodium / potassium ion batteries.

Method used

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  • A kind of ferroferric oxide/carbon composite negative electrode material and its preparation method and application
  • A kind of ferroferric oxide/carbon composite negative electrode material and its preparation method and application
  • A kind of ferroferric oxide/carbon composite negative electrode material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064]This embodiment adopts the following method to prepare Fe3O4 / C Composite anode material:

[0065](1) Weigh 0.33 g of ascorbic acid and add it to the mixed solution consisting of 3 ml of ethylene glycol and 2 ml of methanol, stir until a clear ascorbic acid solution is obtained; add 3.03 g of Fe(NO3)3·9H2O was added to the ascorbic acid solution, and stirring was continued for 1.5 hours to obtain a reaction mixture;

[0066]In the reaction mixture, the concentration of ferric nitrate is 1.5 mol / L, and the molar ratio of ferric nitrate to ascorbic acid is 4:1.

[0067](2) Soak 1 gram of self-assembled monodisperse PS microspheres (with a particle size of 250-325nm) in the above solution for 10 hours, then vacuum filter to obtain the precursor, and place it in a blast at 50°C Dry in a drying box for 24 hours;

[0068]Among them, PS microspheres and Fe(NO3)3·9H2The mass ratio of O is about 1:3.

[0069](3) Place the above-mentioned dried precursor in a tube furnace and perform two-step calcinati...

Embodiment 2

[0076]This embodiment adopts the following method to prepare Fe3O4 / C Composite anode material:

[0077](1) Weigh 0.1887 g of ascorbic acid and add it to the mixed solution consisting of 3 ml of ethylene glycol and 2 ml of methanol, and stir until a clear ascorbic acid solution is obtained; (2) Add 3.03 g of Fe(NO3)3·9H2O was added to the ascorbic acid solution, and stirring was continued for 2 hours to obtain a reaction mixture;

[0078]In the reaction mixture, the concentration of ferric nitrate is 1.5 mol / L, and the molar ratio of ferric nitrate to ascorbic acid is 7:1.

[0079](2) Soak 1 gram of self-assembled monodisperse PS microspheres (with a particle size of 250-325nm) in the above solution for 12 hours, then vacuum filter to obtain the precursor, and place it in a 50°C blast Dry in a drying box for 30 hours;

[0080]Among them, PS microspheres and Fe(NO3)3·9H2The mass ratio of O is about 1:3.

[0081](3) Put the above-mentioned dried precursor in a tube furnace, and carry out two-step cal...

Embodiment 3

[0085]This embodiment adopts the following method to prepare Fe3O4 / C Composite anode material:

[0086](1) Weigh 0.132 g of ascorbic acid and add it to the mixed solution consisting of 3 ml of ethylene glycol and 2 ml of methanol, stir until a clear ascorbic acid solution is obtained; add 3.03 g of Fe(NO3)3·9H2O was added to the ascorbic acid solution, and the stirring was continued for 3 hours to obtain a reaction mixture;

[0087]In the reaction mixture, the concentration of ferric nitrate is 1.5 mol / L, and the molar ratio of ferric nitrate to ascorbic acid is 10:1.

[0088](2) Soak 0.5 g of self-assembled monodisperse PS microspheres (with a particle size of 250-325nm) in the above solution for 15 hours, then vacuum filter to obtain the precursor, and place it in a blast at 50°C Dry in a drying box for 20 hours;

[0089]Among them, PS microspheres and Fe(NO3)3·9H2The mass ratio of O is about 1:6.

[0090](3) Put the above-mentioned dried precursor in a tube furnace and perform two-step calcinat...

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Abstract

The invention provides a ferric oxide / carbon composite negative electrode material, a preparation method and application thereof. The negative electrode material provided by the present invention includes Fe 3 o 4 Particles and a carbon layer that coats the Fe 3 o 4 particles and connect them into one, the Fe 3 o 4 / C composite negative electrode material is a porous material. The preparation method includes: 1) mixing a carbon-containing reducing agent solution with an iron source to obtain a reaction mixture; 2) soaking the template microspheres in the reaction mixture in step (1), separating the solid from the liquid and taking the solid to obtain the reaction mixture. Precursor; 3) calcining the reaction precursor described in step (2) under a protective atmosphere to obtain the Fe 3 o 4 / C composite anode material. The negative electrode material of the invention has high charge-discharge specific capacity, cycle stability and good conductivity, and is suitable for sodium / potassium ion batteries. The preparation method of the invention has simple process, relatively mild synthesis conditions, high repeatability and low cost.

Description

Technical field[0001]The invention belongs to the technical field of batteries, and relates to an electrode material, in particular to a ferroferric oxide / carbon composite negative electrode material and a preparation method and application thereof.Background technique[0002]Lithium-ion batteries have the advantages of high energy density, long cycle life, high discharge voltage, environmental friendliness and no memory effect. They have been widely used in electronic products, electric vehicles, and smart grids. However, the scarcity of lithium resources limits the large-scale application of lithium-ion batteries. On the other hand, due to the abundant reserves of sodium and potassium, low prices, and similar physical and chemical properties to lithium, sodium / potassium ion batteries as a new type of secondary energy system to replace lithium ion batteries have been attracted by researchers at home and abroad. Wide attention.[0003]Traditional graphite anode materials for secondary b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M10/054
CPCY02E60/10
Inventor 罗绍华黄红波刘彩玲闫绳学冯建王志远王庆张亚辉刘延国赵鑫郝爱民刘宣文郭瑞伊廷锋王亚峰
Owner 东北大学秦皇岛分校
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