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Preparation method of dumbbell-shaped negative electrode material for sodium-ion battery

A sodium-ion battery and negative electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor cycle stability and low discharge specific capacity, and achieve good crystallization performance, uniform morphology, and shortened diffusion paths. Effect

Inactive Publication Date: 2016-09-14
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nanorod-shaped Sb prepared by this method 2 o 3 , the discharge specific capacity is not high and the cycle stability is also poor

Method used

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  • Preparation method of dumbbell-shaped negative electrode material for sodium-ion battery
  • Preparation method of dumbbell-shaped negative electrode material for sodium-ion battery
  • Preparation method of dumbbell-shaped negative electrode material for sodium-ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Dissolve 0.10g of analytically pure cetyltrimethylammonium bromide (CTAB) in 40ml of cyclohexane, then add 0.57g of antimony trichloride to it, and magnetically stir to dissolve it evenly to obtain a solution A;

[0020] 2) Dissolve 0.30 g of sodium hydroxide in 5 ml of deionized water and stir evenly to obtain solution B;

[0021] 3) under stirring, solution B is added dropwise to solution A to obtain a mixed solution;

[0022] 4) Put the mixed solution into a temperature-controlled oven and keep it warm at 120°C for 10 hours, then cool it down to room temperature naturally to obtain a sample;

[0023] 5) The sample is centrifuged with a centrifuge, washed alternately with deionized water and ethanol solution, and then dried to obtain a dumbbell-shaped negative electrode material for a sodium ion battery.

[0024] from figure 1 It can be seen that the prepared Sb 2 o 3 High purity, good crystallinity.

[0025] Depend on figure 2 and image 3 It can be seen ...

Embodiment 2

[0027] 1) Dissolve 0.30g of analytically pure cetyltrimethylammonium bromide (CTAB) in 40ml of cyclohexane, then add 1.00g of antimony trichloride to it, and magnetically stir to dissolve it evenly to obtain a solution A;

[0028] 2) Dissolve 0.50 g of sodium hydroxide in 5 ml of deionized water and stir evenly to obtain solution B;

[0029] 3) under stirring, solution B is added dropwise to solution A to obtain a mixed solution;

[0030] 4) Put the mixed solution into a temperature-controlled oven and keep it warm at 150°C for 6 hours, then cool it down to room temperature naturally to obtain a sample;

[0031] 5) The sample is centrifuged with a centrifuge, washed alternately with deionized water and ethanol solution, and then dried to obtain a dumbbell-shaped negative electrode material for a sodium ion battery.

Embodiment 3

[0033] 1) Dissolve 0.20g of analytically pure cetyltrimethylammonium bromide (CTAB) in 40ml of cyclohexane, then add 0.70g of antimony trichloride to it, and magnetically stir to dissolve it evenly to obtain a solution A;

[0034] 2) Dissolve 0.40g of sodium hydroxide in 5ml of deionized water and stir evenly to obtain solution B;

[0035] 3) under stirring, solution B is added dropwise to solution A to obtain a mixed solution;

[0036] 4) Put the mixed solution into a temperature-controlled oven and keep it warm at 80°C for 15 hours, then cool it down to room temperature naturally to obtain a sample;

[0037] 5) The sample is centrifuged with a centrifuge, washed alternately with deionized water and ethanol solution, and then dried to obtain a dumbbell-shaped negative electrode material for a sodium ion battery.

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Abstract

The invention provides a preparation method of a dumbbell-shaped negative electrode material for a sodium-ion battery. The method comprises the steps of: dissolving analytically pure hexadecyl trimethyl ammonium bromide into cyclohexane, adding antimony butter and carrying out magnetic stirring to obtain a solution A; dissolving sodium hydroxide into deionized water for stirring evenly to obtain a solution B; dropwise adding the solution B to the solution A under a stirring condition to obtain a mixed solution; putting the mixed solution into a temperature control oven for reaction and then naturally cooling the product to a room temperature to obtain a sample; and centrifuging the sample by a centrifugal machine, alternately washing the sample by deionized water and an ethanol solution and then drying the product to obtain the dumbbell-shaped negative electrode material for the sodium-ion battery. The Sb2O3 microcrystal prepared by the method is uniform in chemical composition, relatively high in purity and uniform in shape and form; and the obtained dumbbell-shaped product is about 2-3 microns in diameter and about 5 microns in length. The specific surface area of the material can be effectively increased by the shape and form; the contact area of the electrode material and an electrolyte is increased; and meanwhile, the diffusion path of lithium ions can be shortened, so that the electrochemical properties of the material can be improved.

Description

technical field [0001] The invention relates to a preparation method of a negative electrode material of a sodium ion battery, in particular to a preparation method of a dumbbell-shaped negative electrode material of a sodium ion battery. Background technique [0002] In recent years, due to its advantages of light weight, high voltage, high capacity, high power, stable discharge, and environmental friendliness, lithium-ion batteries have been widely used in portable electronic devices, electric vehicles, space technology, and defense industries. Prospects and potentially huge economic benefits. However, limited lithium resources and rising lithium raw material prices limit the large-scale development of lithium-ion batteries. On the other hand, the reserves of sodium element are extremely abundant (the metal elements in the earth's crust rank fourth, accounting for 2.64% of the total reserves), and the price is low. It is in the same main group as lithium, with similar che...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M4/48H01M4/139
CPCH01M4/139H01M4/48H01M10/36Y02E60/10
Inventor 费杰崔亚丽康倩李嘉胤张超罗丹黄剑锋许占位
Owner SHAANXI UNIV OF SCI & TECH
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