A kind of preparation method of porous carbon sphere supported sulfide composite material

A composite material and porous carbon technology, applied in the field of materials, can solve the problems of easy agglomeration of sulfides, unstable cycle performance, capacity reduction, etc., and achieve the effects of uniform size distribution, stable product morphology, and no need for heating.

Active Publication Date: 2020-06-26
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among many anode materials for sodium-ion batteries, metal sulfides are favored due to their high theoretical specific capacity, good electrical conductivity, abundant reserves, and non-polluting properties to the environment. The volume expansion is extremely obvious during the charging and discharging process, so the capacity drops sharply, and the cycle performance is unstable, which limits its further development and application

Method used

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  • A kind of preparation method of porous carbon sphere supported sulfide composite material
  • A kind of preparation method of porous carbon sphere supported sulfide composite material
  • A kind of preparation method of porous carbon sphere supported sulfide composite material

Examples

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Effect test

Embodiment 1

[0038] 1) Preparation of porous carbon spheres by high temperature spray pyrolysis

[0039] In the first step, weigh 17.4g of sodium chloroacetate and dissolve it in 100mL of deionized water, add it to the humidifier to generate mist;

[0040] In the second step, 1.2L / min argon gas is continuously fed into the humidifier, and the mist is introduced into the quartz tube of the tube furnace working at 700°C;

[0041] The third step is to use absolute ethanol to collect the gas discharged from the quartz tube;

[0042] In the fourth step, the product was centrifuged at 5000 rpm to collect the precipitate, and dried in a vacuum oven at 60° C. for 5 hours, and the obtained product was porous carbon spheres.

[0043] 2) Porous carbon spheres loaded with SnS 2 Synthesis of Composite Materials

[0044] Step 1: Accurately weigh 0.05g of porous carbon spheres and disperse them in 50mL of absolute ethanol. After the ultrasonic dispersion is uniform, add 0.225g of SnCl 4 ·5H 2 O;

...

Embodiment 2

[0049] 1) Preparation of porous carbon spheres by high temperature spray pyrolysis

[0050] In the first step, weigh 17.4g of sodium chloroacetate and dissolve it in 100mL of deionized water, add it to the humidifier to generate mist;

[0051] In the second step, 1.2L / min argon gas is continuously fed into the humidifier, and the mist is introduced into the quartz tube of the tube furnace working at 700°C;

[0052] The third step is to use absolute ethanol to collect the gas discharged from the quartz tube;

[0053] In the fourth step, the product was centrifuged at 5000 rpm to collect the precipitate, and dried in a vacuum oven at 60° C. for 5 hours, and the obtained product was porous carbon spheres.

[0054] 2) Porous carbon spheres loaded with Sb 2 S 3 Synthesis of Composite Materials

[0055] Step 1: Accurately weigh 0.05g of porous carbon spheres and disperse them in 50mL of absolute ethanol, and add 0.234g of SbCl after ultrasonic dispersion 3 ;

[0056] The secon...

Embodiment 3

[0060] The preparation method of the porous carbon sphere-supported sulfide composite material specifically adopts the following steps: add the porous carbon spheres to the absolute ethanol solvent, control the amount of the porous carbon spheres added in the solvent to 0.5mg / mL, and after ultrasonic dispersion, add Metal salt SnCl 4 ·5H 2 O Ultrasonic mixing, the concentration of the metal salt is 0.005mol / L, and then add the sulfur source CH under stirring conditions 3 CSNH 2 , the concentration is 0.01mol / L, keep the temperature at 0 ℃ for reaction, centrifuge after finishing the reaction and wash the product successively with 75% ethanol and absolute ethanol to obtain porous carbon sphere loaded sulfide (SnS 2 ) composite material.

[0061] Porous carbon spheres are prepared by the following method:

[0062] (1) Dissolve sodium chloroacetate in deionized water, the concentration range of sodium chloroacetate is 0.5mol / L, add it into the humidifier, generate mist drople...

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Abstract

The invention relates to a preparation method of a porous carbon sphere loaded sulfide composite material. Porous carbon spheres are added into solvent to be subjected to ultrasonic dispersion, metal salt is added, ultrasonic mixing is conducted to be uniform, a sulfur source is added under the stirring condition, a certain temperature is kept for reacting, after reacting is finished, centrifugal washing is conducted, products are collected, and the porous carbon sphere loaded sulfide composite material is obtained. Compared with the prior art, the technology is simple, the preparation condition is in common use, the products are stable in morphology and high in purity, product treatment is convenient and simple, and the method is suitable for medium scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a porous carbon sphere-loaded sulfide composite material. Background technique [0002] As energy and environmental issues become increasingly prominent, more and more new energy sources are used to replace traditional fossil energy sources. Lithium-ion batteries have been widely used in every aspect of daily life as a form of energy storage. However, due to the increasing scarcity and uneven global distribution of lithium resources, its high application cost can no longer meet people's expectations for its large-scale application. Based on the same energy storage mechanism, sodium-ion batteries have been gradually paid attention to by researchers due to their obvious advantages in terms of cost and safety. Among many anode materials for sodium-ion batteries, metal sulfides are favored due to their high theoretical specific capacity, good e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/364H01M4/5815H01M4/628H01M10/054Y02E60/10
Inventor 温鸣邢柯陈世培李佳琪傅琳
Owner TONGJI UNIV
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