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Preparation method of tin sulfide-carbon nanotube composite electrode material

A carbon nanotube composite and tin disulfide technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of cumbersome preparation process and achieve the effects of simple preparation method, regular shape and excellent cycle performance

Inactive Publication Date: 2017-11-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the electrochemical performance of the composite with carbon nanotubes is greatly improved, many template agents and dispersants are added in the preparation process, which makes the preparation process more cumbersome

Method used

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  • Preparation method of tin sulfide-carbon nanotube composite electrode material
  • Preparation method of tin sulfide-carbon nanotube composite electrode material
  • Preparation method of tin sulfide-carbon nanotube composite electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1, adding 30 mg of carboxylated multi-walled carbon nanotubes to 60 mL of absolute ethanol, and ultrasonically dispersed for 3 hours to obtain dispersion A;

[0036] Step 2, weigh 0.53g of tin tetrachloride pentahydrate and add it to the obtained dispersion A, stir for 20min, then add 0.45g of thioacetamide under stirring, and stir for 30min to obtain solution B;

[0037] Step 3, the obtained solution B was transferred to a reaction kettle lined with polytetrafluoroethylene, kept at 160°C for 12 hours, and naturally cooled to room temperature after the reaction to obtain a dark green precipitate;

[0038]Step 4, collect the dark green precipitate and successively wash it with deionized water and absolute ethanol by centrifugation, and place it in a vacuum drying oven at 60°C for 12 hours to obtain a tin disulfide-carbon nanotube composite electrode material for lithium ion batteries.

[0039] Such as figure 1 Shown, be the XRD collection of illustrative plates of ...

Embodiment 2

[0041] Step 1, adding 90 mg of carboxylated multi-walled carbon nanotubes to 60 mL of absolute ethanol, and ultrasonically dispersed for 2.5 hours to obtain dispersion A;

[0042] Step 2, weigh 0.53g of tin tetrachloride pentahydrate and add it to the obtained dispersion A, stir for 10min, then add 0.45g of thioacetamide under stirring, and stir for 35min to obtain solution B;

[0043] Step 3, transfer the obtained solution to a reaction kettle lined with polytetrafluoroethylene, heat it with conventional water at 180°C for 16 hours, and cool it naturally to room temperature after the reaction to obtain a dark green precipitate;

[0044] Step 4, collect the dark green precipitate, wash it with deionized water and absolute ethanol successively, and dry it in a vacuum oven at 80° C. for 8 hours to obtain a tin disulfide-carbon nanotube composite electrode material for lithium ion batteries.

[0045] Such as figure 2 Shown is the transmission electron micrograph of the tin disu...

Embodiment 3

[0047] Step 1, adding 60 mg of carboxylated multi-walled carbon nanotubes to 60 mL of absolute ethanol, and ultrasonically dispersed for 3.5 hours to obtain dispersion A;

[0048] Step 2, weigh 0.53g of tin tetrachloride pentahydrate and add it to the obtained dispersion A, stir for 20min, then add 0.45g of thioacetamide under stirring, and stir for 30min to obtain solution B;

[0049] Step 3, the obtained solution B was transferred to a reaction kettle lined with polytetrafluoroethylene, kept at 180°C for 12 hours, and naturally cooled to room temperature after the reaction, to obtain a dark green precipitate;

[0050] Step 4, collect the dark green precipitate and successively wash it with deionized water and absolute ethanol, and dry it in a vacuum oven at 70°C for 10 hours to obtain a tin disulfide-carbon nanotube composite electrode material for lithium ion batteries.

[0051] Such as Figure 3-4 as shown, Figure 3-4 For the scanning electron micrograph of the prepared...

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Abstract

The invention discloses a preparation method of a tin sulfide-carbon nanotube composite electrode material. The preparation method comprises the steps of 1, adding a certain amount of a carboxylation multiwalled carbon nanotube into a certain amount of absolute ethyl alcohol, and performing ultrasonic dispersion for 2.5-3.5 hours to obtain a dispersion liquid A; 2, weighing a certain amount of tin chloride pentahydrate into the dispersion liquid A in the step 1, performing stirring for 10-30 minutes, adding a certain amount of thioacetamide under a stirring state, and performing stirring for 30-40 minutes to obtain a solution B; 3, transferring the solution B obtained in the step 2 to a reaction kettle with a polytetrafluoroethylene lining, performing hydrothermal reaction under a certain temperature, naturally cooling to a room temperature after reaction is completed to obtain a deep green precipitant; and 4, collecting the deep green precipitant obtained in the step 3, sequentially and centrifugally washing the deep green precipitant with deionized water and the absolute ethyl alcohol, and placing the deep green precipitant in a vacuum drying box for drying to obtain the tin sulfide-carbon nanotube composite electrode material. The tin sulfide-carbon nanotube composite electrode material is simple in preparation process.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of electrode materials, and relates to a preparation method of tin disulfide-carbon nanotube composite electrode materials. Background technique [0002] The problems of environmental pollution and energy shortage are becoming more and more serious, and people urgently need to find an efficient, clean and sustainable new energy. New energy devices such as lithium-ion batteries have become popular in the research field due to their high energy density, good cycle stability, long life, clean and pollution-free and many other excellent characteristics. As one of the most important components of lithium-ion batteries, negative electrode active materials have become the key to the development of lithium-ion batteries. Due to its high lithium storage capacity (645mAh g -1 ) has received extensive attention from the battery material community. [0003] However, tin disulfide, as the anode ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/362H01M4/5815H01M4/625H01M4/628H01M10/0525Y02E60/10
Inventor 刘辉邓璐庞凌燕朱建锋李军奇何选盟
Owner SHAANXI UNIV OF SCI & TECH
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