Preparation method and application of antimony sulfide nanorod

A technology of nanorods and antimony sulfide, applied in antimony sulfide, chemical instruments and methods, nanotechnology, etc., can solve the problems of low reversible capacity and limitations, and achieve good industrialization prospects, improved volume expansion, and good electrochemical performance Effect

Active Publication Date: 2021-11-16
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Sodium ion negative electrode materials mainly include carbon-based materials, alloy materials, titanium-based ...

Method used

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  • Preparation method and application of antimony sulfide nanorod
  • Preparation method and application of antimony sulfide nanorod
  • Preparation method and application of antimony sulfide nanorod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Add 0.23g (1mmoL) antimony trichloride (SbCl 3 ) was dissolved in 10mL of absolute ethanol, ultrasonically stirred to dissolve, and the volume of absolute ethanol was 10 times the amount of the antimony source substance;

[0027] 2) Add 0.076g (1mmoL) thiourea (CH 4 N 2 S), stir 0.5h to dissolve evenly, the amount of the substance of thiourea is 1 times of antimony source;

[0028] 3) Add oleylamine solution with a volume of 10 mL to the above solution and stir for 0.5 h to fully dissolve it;

[0029] 4) Put the above-mentioned mixed solution into a 50mL polytetrafluoroethylene substrate, install the shell of a stainless steel reaction kettle, and conduct a hydrothermal reaction at 180°C for 12 hours;

[0030] 5) Collect the solution after the hydrothermal reaction, centrifuge three times with cyclohexane and then centrifuge three times with glacial acetic acid, then obtain a black precipitate, and dry the precipitate to obtain the black sulfurized ladder nanorod;...

Embodiment 2

[0033] 1) Add 0.23g (1mmoL) antimony trichloride (SbCl 3 ) was dissolved in 20mL oleylamine, and dissolved by ultrasonic stirring for 0.5h;

[0034] 2) Add 0.076g (1mmoL) thiourea (CH 4 N 2 S), stir 0.5h to dissolve evenly, the amount of the substance of thiourea is 1 times of antimony source;

[0035] 3) Put the above-mentioned mixed solution into a 50mL polytetrafluoroethylene substrate, and put it on the shell of a stainless steel reaction kettle for hydrothermal reaction at 180°C for 12 h;

[0036] 4) Collect the solution after the hydrothermal reaction, first centrifuge three times with cyclohexane and then centrifuge three times with glacial acetic acid, then obtain a black precipitate, and dry the precipitate to obtain the black vulcanized ladder nanorod material;

[0037] 5) Fully grind the dried black vulcanized ladder nanorods as the negative electrode material of the sodium ion electrode, and mix them with carbon black and carboxymethyl cellulose according to the r...

Embodiment 3

[0039] The operation is the same as in Example 1, except that the volume ratio of absolute ethanol and oleylamine is 1mL ethanol / 19mL oleylamine. Scanning electron microscopy (SEM) (e.g. figure 2 (b)) Observe that the obvious agglomeration phenomenon of the obtained product has disappeared, but the shape of the rod is still irregular, the size is not uniform, and there are still many particles in it. Cycle performance curve ( image 3 ) analysis, the charge-discharge cycle performance drops sharply after 50 cycles.

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Abstract

The invention discloses a preparation method and application of an antimony sulfide nanorod. The preparation method comprises the following steps: by taking absolute ethyl alcohol and oleylamine as solvents, firstly dissolving an antimony source into an absolute ethyl alcohol beaker with a certain volume, ultrasonically stirring for several minutes, uniformly dissolving, then adding a sulfur source, stirring on a magnetic stirrer for 0.5 hour until the sulfur source is completely dissolved, finally adding an oleylamine solution into the mixed solution, continuously stirring for 0.5 hour, pouring into a high-pressure reaction kettle, carrying out a reaction, cooling to room temperature, respectively centrifuging three times by using cyclohexane and glacial acetic acid to obtain a black precipitate, and drying the black precipitate in a drying oven to prepare the uniform sulfide ladder nanorod. The method has the advantages of simple equipment, simple experimental operation, short production period, good particle dispersity, low cost and easiness in industrial production, and solves the common problems of remarkable volume effect, poor conductivity and the like in the sodium ion battery negative electrode material, so that the electrochemical performance of the electrode material is effectively improved.

Description

technical field [0001] The invention relates to the technical field of negative electrode materials for sodium ion batteries, in particular to a preparation method and application of antimony sulfide nanorods. Background technique [0002] In recent years, the development of sodium-ion batteries has become a hot spot. Compared with lithium-ion batteries, it has the characteristics of rich sodium in the earth's crust, cheap prices, and less difficulty in mining. Therefore, sodium-ion batteries will have better competition in the future. Advantages, but because the radius of sodium is larger than that of lithium, it is difficult to deintercalate in the positive and negative materials, resulting in a relatively large volume change of the material, which in turn will destroy the positive and negative materials, resulting in the capacity of the sodium ion battery Compared with lithium-ion batteries, the cycle stability performance is relatively poor. Therefore, the performance o...

Claims

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Application Information

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IPC IPC(8): C01G30/00B82Y30/00B82Y40/00H01M4/136H01M4/58H01M10/054
CPCC01G30/008H01M4/5815H01M4/136H01M10/054B82Y30/00B82Y40/00H01M2004/027H01M2004/021C01P2002/72C01P2004/03C01P2004/62C01P2006/40Y02E60/10
Inventor 许宁王国乾岳鹿张文惠
Owner JIANGSU UNIV
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