Preparation method of lamellar stannic sulfide/silicon oxide nuclear shell nanorod for lithium battery

A silicon dioxide and tin disulfide technology, applied in the field of materials science, can solve the problems of difficult synthesis of layered tin disulfide nanorods, and achieve the effects of facilitating commercial application, buffering volume expansion, and improving cycle performance

Active Publication Date: 2012-04-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis of layered tin disulfide nanorods has always been an international problem, and so far, there has been no relevant report

Method used

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  • Preparation method of lamellar stannic sulfide/silicon oxide nuclear shell nanorod for lithium battery
  • Preparation method of lamellar stannic sulfide/silicon oxide nuclear shell nanorod for lithium battery
  • Preparation method of lamellar stannic sulfide/silicon oxide nuclear shell nanorod for lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Add 0.05 gram of tin nanorods to 120 milliliters of ethanol solution, ultrasonic for 5 minutes, then add 20 milliliters of water, 20 milliliters of ammonia and 30 microliters of tetraethyl orthosilicate solution, and react at room temperature for 60 minutes to obtain tin / Silica core-shell nanorods; NH in ammonia used 3 The mass percentage content is 25 to 28%, and the SiO in the tetraethyl orthosilicate solution used 2 The mass percentage content is higher than 28.0%;

[0025] (2) Place 0.5 gram of tin / silicon dioxide core-shell nanorods obtained in step (1) in a tube furnace for vulcanization reaction, the sulfur source used is 1 gram of hydrogen sulfide gas, the reaction temperature is 400 ° C, and the reaction time is After 360 minutes, layered tin disulfide / silica core-shell nanorods were obtained.

[0026] Figure 1 ~ Figure 4 These are scanning electron micrographs, transmission electron micrographs, high-resolution transmission electron micrographs and X-...

Embodiment 2

[0028] (1) Add 0.005 gram of tin nanorods to 20 milliliters of ethanol solution, sonicate for 1 minute, then add 5 milliliters of water, 5 milliliters of ammonia and 5 microliters of ethyl orthosilicate solution successively, and react at room temperature for 30 minutes to obtain tin / Silica core-shell nanorods; NH in ammonia used 3 The mass percentage content is 25 to 28%, and the SiO in the tetraethyl orthosilicate solution used 2 The mass percentage content is higher than 28.0%;

[0029] (2) Place 0.05 gram of tin / silicon dioxide core-shell nanorods obtained in step (1) in a tube furnace for vulcanization reaction. The sulfur source used is 5 grams of sulfur powder, the reaction temperature is 450 ° C, and the reaction time is 30 Minutes, layered tin disulfide / silica core-shell nanorods were obtained. The result is similar to Example 1.

Embodiment 3

[0031] (1) 0.5 grams of tin nanorods are added to 1 liter of ethanol solution, ultrasonicated for 30 minutes, followed by adding 200 milliliters of water, 200 milliliters of ammonia and 200 microliters of ethyl orthosilicate solution, and reacting at room temperature for 720 minutes to obtain tin / Silica core-shell nanorods; NH in ammonia used 3 The mass percentage content is 25 to 28%, and the SiO in the tetraethyl orthosilicate solution used 2 The mass percentage content is higher than 28.0%;

[0032] (2) 0.05 grams of tin / silica core-shell nanorods obtained in step (1) are placed in a tube furnace for vulcanization reaction, the sulfur source used is 0.5 grams of hydrogen sulfide, the reaction temperature is 500 ° C, and the reaction time is 720 Minutes, layered tin disulfide / silica core-shell nanorods were obtained. The result is similar to Example 1.

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Abstract

The invention discloses a preparation method of a lamellar stannic sulfide / silicon oxide nuclear shell nanorod for a lithium battery. The preparation method comprises the following steps of: adding a tin nanorod to ethanol solution and carrying out ultrasonic dispersion; and then sequentially adding a certain amount of water, ammonia water and tetraethoxysilane solution, reacting for 30-720 minutes, carrying out centrifugal separation and drying to obtain a tin / silicon oxide nuclear shell nanorod; carrying out vulcanization reaction on the tin / silicon oxide nuclear shell nanorod in a tube furnace for 30-720 minutes at 400-600 DEG C to finally obtain the lamellar stannic sulfide / silicon oxide nuclear shell nanorod. The preparation method provided by the invention can be used for mass production and is convenient for commercial application to the negative electrode material of a lithium ion battery. After the lamellar stannic sulfide / silicon oxide nuclear shell nanorod which is synthesized by the method disclosed by the invention is applied to the negative electrode material of the lithium ion battery, the cycle performance is remarkably improved.

Description

technical field [0001] The invention belongs to the field of material science, and in particular relates to a preparation method of layered tin disulfide / silicon dioxide core-shell nanorods for lithium batteries. Background technique [0002] As an important tin-based material, tin disulfide has a wide range of applications in catalysis, sensors, and energy storage. Among them, due to the high specific capacity and superior cycle performance of layered tin disulfide nanomaterials, they have great prospects in the commercial application of lithium-ion battery anode materials. At present, the research on layered tin disulfide nanomaterials mainly focuses on the synthesis of tin disulfide nanosheets and their lithium battery performance. Due to its own structural characteristics, layered tin disulfide nanomaterials tend to form nanosheets, nanotubes, and fullerene-like structures instead of layered stacked nanorods to reduce the energy of the entire system. The synthesis of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48B82Y40/00
CPCY02E60/12Y02E60/10
Inventor 杜宁吴平杨德仁张辉刘杰
Owner ZHEJIANG UNIV
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