Preparation method of nano-sheet Sb/C composite material for lithium ion/sodium ion battery anode

A sodium-ion battery, nanosheet technology, applied in nanotechnology for materials and surface science, battery electrodes, negative electrodes, etc., can solve the problems of slow ion and electron movement, poor material rate performance, etc. The effect of reliable production of product structure

Active Publication Date: 2019-09-20
HENAN NORMAL UNIV
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Problems solved by technology

[0004] The present invention addresses the problems of most novel lithium-ion / sodium-ion battery anode materials in micron-scale and larger bulk materials: the material has a huge volume expansion during the charge-discharge cycle; the movement rate of ions and electrons in the material is relatively slow , so that the material has poor rate performance; and a method for preparing a nano-sheet-shaped Sb / C composite material for lithium-ion / sodium-ion battery negative electrodes is provided, and the nano-scale sheet-shaped battery negative electrode composite material prepared by the method can Make lithium-ion / sodium-ion batteries have higher energy density and better rate performance

Method used

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  • Preparation method of nano-sheet Sb/C composite material for lithium ion/sodium ion battery anode
  • Preparation method of nano-sheet Sb/C composite material for lithium ion/sodium ion battery anode
  • Preparation method of nano-sheet Sb/C composite material for lithium ion/sodium ion battery anode

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Effect test

Embodiment 1

[0029] antimony salt SbCl 3 and the ligand 2-methylimidazole were dissolved in the solvent methanol respectively to obtain a concentration of 0.05mg / mL antimony salt solution and a concentration of 20mg / mL ligand solution, the antimony salt solution and the ligand solution in a volume ratio of 3:1 Mix and continue to stir and react at 25°C for 3h. After the reaction, age for 18h, wash with methanol for 3 times, and dry at 60°C to obtain a nano-flaky Sb precursor; disperse the obtained nano-flaky Sb precursor in ethanol and water A dispersion solution with a concentration of 10 mg / mL was formed in the mixed solution, and then resorcinol, formaldehyde, CTAB and ammonium hydroxide were added to carry out carbon coating, and the reaction was continuously stirred for 3 hours. After the reaction, it was aged for 18 hours and washed with ethanol for 3 hours. The nanosheet-like Sb / C precursor was obtained after drying at 60°C; the obtained nanosheet-like Sb / C precursor was heated at a...

Embodiment 2

[0032] The antimony salt Sb(NO 3 ) 3 and the ligand cis 1,3-dimethylimidazole were dissolved in solvent methanol respectively to obtain a concentration of 0.1mg / mL antimony salt solution and a concentration of 10mg / mL ligand solution, antimony salt solution and ligand solution by volume Mix at a ratio of 3:1 and continue to stir and react at 25°C for 12h. After the reaction is completed, it is aged for 18h, centrifuged with methanol for 3 times, and dried at 60°C to obtain a nano-sheet Sb precursor; the obtained nano-sheet Sb precursor is dispersed Form a dispersion with a concentration of 10 mg / mL in a mixed solution of ethanol and water, then add resorcinol, formaldehyde, CTAB and ammonium hydroxide for carbon coating, continue stirring for 3 hours, and age for 18 hours after the reaction. The nanosheet-like Sb / C precursor was obtained after centrifuged washing with ethanol for 3 times and drying at 60 °C; the obtained nanosheet-like Sb / C precursor was heated at 1 °C / The ...

Embodiment 3

[0035] antimony salt Sb 2 (SO 4 ) 3 and the ligand 4,4-bipyridine were dissolved in the solvent methanol respectively to obtain an antimony salt solution with a concentration of 1 mg / mL and a ligand solution with a concentration of 4 mg / mL. The antimony salt solution and the ligand solution were mixed in a volume ratio of 3:1 Mix and continue to stir and react at 25°C for 2h. After the reaction, age for 18h, wash with methanol for 3 times, and dry at 60°C to obtain a nano-sheet Sb precursor; disperse the obtained nano-sheet Sb precursor in ethanol and water A dispersion solution with a concentration of 10mg / mL was formed in the mixed solution, and then resorcinol, formaldehyde, CTAB and ammonium hydroxide were added to carry out carbon coating, and the reaction was continuously stirred for 3 hours. After drying at 60°C, the nanosheet-like Sb / C precursor was obtained; the obtained nanosheet-like Sb / C precursor was heated at a rate of 5°C / min to Calcined at 600°C for 8h, and ...

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Abstract

The invention discloses a preparation method of a nano-sheet Sb / C composite material for lithium ion / sodium ion battery anode and belongs to the technical field of a lithium ion / sodium ion battery anode material. The technical scheme is mainly characterized in that dissolving antimony salts and ligands into a solvent for reaction to obtain a sheet-shape precipitate as an intermediate; and carrying out resorcinol-formaldehyde carbon coating on the intermediate, and then, carrying out sintering to obtain the nano-sheet Sb / C composite material for the lithium ion / sodium ion battery anode. The synthesis method has the advantages of simple equipment, simple operation and special structure of the prepared products and the like; and the prepared nano-sheet Sb / C composite material can greatly improve energy density and rate capability of the lithium ion / sodium ion battery.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion / sodium-ion battery anode materials, and in particular relates to a preparation method of a nano-flaky Sb / C composite material used for the lithium-ion / sodium-ion battery anode. Background technique [0002] With the development of society and the continuous improvement of living standards, people's demand for energy has also increased sharply. In recent years, the shortage of fossil energy has become one of the key problems that need to be solved in the world. In order to alleviate this situation, many scholars at home and abroad have conducted in-depth research on renewable energy such as wind energy, solar energy, and tidal energy. Although it alleviates the energy shortage to a certain extent, it is limited by natural factors and requires large-scale energy storage facilities when it is used. Therefore, it is imperative to carry out research on energy storage systems with high energy densi...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/0525H01M10/054B82Y30/00
CPCH01M4/366H01M4/38H01M4/625H01M4/628H01M10/0525H01M10/054B82Y30/00H01M2004/021H01M2004/027Y02E60/10
Inventor 李苞刘晓阳代冬梅王琳李再欢王晓娟曹博博周新新
Owner HENAN NORMAL UNIV
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