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Preparation method and application of sulfur nano-particle dispersion liquid

A nanoparticle and dispersion technology is applied in the field of preparation of sulfur nanoparticle dispersion, which can solve the problems of unfavorable improvement of electrochemical performance, uneven material size, limited feasibility, etc. , the effect of improving operability

Inactive Publication Date: 2016-12-21
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Application Information

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Problems solved by technology

In the traditional preparation method of sulfur nanoparticles, the use of other auxiliary reagents such as surfactants will introduce heteroatoms into the prepared materials. At the same time, the size of the materials is not uniform, which is not conducive to improving its electrochemical performance; people also use dissolution redeposition method to obtain nanoscale sulfur particles with uniform size, but limited by the non-polarity of sulfur, it is not easy to operate in aqueous solution, which greatly limits the feasibility of its preparation

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  • Preparation method and application of sulfur nano-particle dispersion liquid
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  • Preparation method and application of sulfur nano-particle dispersion liquid

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Embodiment 1

[0022] Embodiment 1: the hydrogen sulfide gas is passed into the container that fills 100mL deionized water, under the situation of 40 ℃, keep 20min, take the deionized water of unit volume (1L) as a benchmark, the rate of passage is 5mL / min, So that part of the hydrogen sulfide gas is dissolved in water, the saturation is 80%, keep fully stirring 300r / min in this process, guarantee the uniform distribution of hydrogen sulfide gas; The injection rate was 8mL / min, while keeping the hydrogen sulfide input rate constant, the two gases were jointly injected into the water phase for 20 minutes, and after the solution appeared pale white, the gas was stopped, and the obtained pale white solution was the sulfur nanoparticle dispersed solution. liquid. The particle size distribution and electrochemical performance of the prepared sulfur nanoparticle dispersion are shown in Table 1.

Embodiment 2

[0023] Embodiment 2: The process of this embodiment is the same as that of Embodiment 1, except that the reaction temperature is changed to 50°C. The rest are the same as in Embodiment 1, and will not be repeated here. The particle size distribution and electrochemical performance of the prepared sulfur nanoparticle dispersion are shown in Table 1.

Embodiment 3

[0024] Embodiment 3: The process of this embodiment is the same as that of Embodiment 1, except that the reaction temperature is changed to 60°C. The rest are the same as in Embodiment 1, and will not be repeated here. The particle size distribution and electrochemical performance of the prepared sulfur nanoparticle dispersion are shown in Table 1.

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Abstract

The invention discloses a preparation method and application of sulfur nano-particle dispersion liquid. The method is mainly characterized in that redox reaction of hydrogen sulfide and sulfur dioxide is carried out in a solution phase, and the solution phase is driven through an external force in a reaction process, so that the solution phase is at a stirring state, and the hydrogen sulfide and the sulfur dioxide are fully and uniformly mixed in the solution phase for reaction. Through controlling the reaction parameters of the method, the sulfur nano-particle dispersion liquid with small size and uniformity can be prepared. Sulfur nano-particles can stably exist in the solution phase and are conveniently adopted as sulfur active substances for a secondary electric power supply technology (a lithium-sulfur battery and the like), and the electrochemical performance is good.

Description

technical field [0001] The invention relates to a preparation method of sulfur nanoparticle dispersion liquid, and more specifically, belongs to the field of preparation and application of sulfur nanoparticle. Background technique [0002] Sulfur is a non-metallic element that is widely distributed in nature. Sulfur has been used for thousands of years as a gift of nature. Sulfur was listed as an important medicinal material in ancient China, and, as the main component of gunpowder, the extraction and refining technology of sulfur has also achieved considerable development. In addition, with the development of modern industry, sulfur is mainly used in the preparation of sulfuric acid. A widely used industrial product. [0003] Both hydrogen sulfide and sulfur dioxide are major pollutants in the atmosphere, and are important emissions from industrial production and automobile exhaust, which have negative effects on the ecological environment and human health. Therefore, th...

Claims

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Application Information

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IPC IPC(8): H01M4/38H01M10/052B82Y40/00
CPCB82Y40/00H01M4/38H01M10/052Y02E60/10
Inventor 杨全红刘东海张辰吴思达游从辉吕伟孔德斌陶莹康飞宇
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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