Halide ion assisted copper sulfide micron flower-structure material as well as preparation method and application thereof

A technology of halide ions and copper sulfide, applied in the field of nanomaterials, can solve the problems of poor cycle stability of transition metal sulfides, large stability problems of transition metal sulfides, etc., and achieves improved cycle stability and rate performance, and low production costs. , the effect of structural stability

Inactive Publication Date: 2019-06-21
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] A major factor affecting battery performance is the electrode material. The research and development of negative electrode materials has become a research hotspot in recent years. The unique structure and electrochemical properties of transition metal sulfides make them the first choice for negative electrode materials. Poor cycle stability also exists, and how to solve the stability problem of transition metal sulfides as lithium / sodium ion battery anode materials is facing a lot of challenges

Method used

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  • Halide ion assisted copper sulfide micron flower-structure material as well as preparation method and application thereof
  • Halide ion assisted copper sulfide micron flower-structure material as well as preparation method and application thereof
  • Halide ion assisted copper sulfide micron flower-structure material as well as preparation method and application thereof

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Effect test

Embodiment 1

[0046] A preparation method of copper sulfide micron flower material assisted by chloride ions, comprising the following steps:

[0047] Dissolve copper nitrate in a mixed solution of 50ml double-distilled water and 20ml absolute ethanol, add thiourea and stir evenly, first magnetically stir for 5 minutes, then add sodium chloride to the mixed solution, and in the final mixed solution, copper nitrate, The concentrations of thiourea and sodium chloride are 0.1M, 0.2M, and 0.2M respectively. Stir the mixed solution for 30 minutes and then transfer it to a 100mL stainless steel polytetrafluoroethylene high-temperature reaction kettle for hydrothermal reaction at 120-140°C for 10- After 14 hours, take out the reactor and let it cool down to room temperature naturally. After that, collect the product by centrifugation, wash it several times with water and absolute ethanol respectively, and then put the product in a vacuum drying oven at 60 degrees to dry for 12 hours, and then you c...

Embodiment 2

[0055] A preparation method of copper sulfide micron flower material assisted by chloride ions, comprising the following steps:

[0056] Dissolve copper nitrate in a mixed solution of 50ml double-distilled water and 20ml absolute ethanol, add thiourea and stir evenly, first magnetically stir for 5 minutes, then add sodium chloride to the mixed solution, and in the final mixed solution, copper nitrate, The concentrations of thiourea and sodium chloride are 0.2M, 0.4M, and 0.2M respectively. Stir the mixed solution for 30 minutes and then transfer it to a 100mL stainless steel polytetrafluoroethylene high-temperature reactor, and conduct a hydrothermal reaction at 120-140°C for 10- After 14 hours, take out the reactor and let it cool down to room temperature naturally. After that, the product is collected by centrifugation, washed several times with water and absolute ethanol respectively, and then put the product in a vacuum drying oven at 60°C for 12 hours to obtain chloride io...

Embodiment 3

[0058] A preparation method of copper sulfide micron flower material assisted by chloride ions, comprising the following steps:

[0059] Dissolve copper nitrate in a mixed solution of 50ml double-distilled water and 20ml absolute ethanol, add thiourea and stir evenly, first magnetically stir for 5 minutes, then add sodium chloride to the mixed solution, and in the final mixed solution, copper nitrate, The concentrations of thiourea and sodium chloride were 0.1M, 0.2M and 0.3M, respectively. Stir the mixed solution for 30 minutes, then transfer it to a 100mL stainless steel polytetrafluoroethylene high-temperature reactor, and conduct a hydrothermal reaction at 120-140°C for 10-14 hours, take out the reactor and cool it to room temperature naturally, after that, collect the product by centrifugation, and then water and anhydrous ethanol for several times, and then put the product into a vacuum drying oven at 60°C for 12 hours to obtain the copper sulfide micron flower material ...

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Abstract

The invention discloses a halide ion assisted copper sulfide micron flower-structure material as well as a preparation method and an application thereof. A copper source and thiourea are dissolved ina mixed solution of redistilled water and absolute ethyl alcohol and mixed uniformly, sodium halide is added, after sodium halide is completely dissolved, the sodium halide is transferred into a high-pressure reactor for a hydrothermal reaction, natural cooling is performed after a reaction ends, centrifugation, washing and drying are performed, and the material can be obtained. The interlayer spacing of copper sulfide is increased through halide ions, meanwhile, the structure of copper sulfide is adjusted by use of a coordination effect, and the specific surface area and the active edge are increased. The halide ion assisted copper sulfide micron flower-structure material is taken as a lithium/sodium ion battery negative electrode material, has a large specific surface area and is favorable for infiltrating an electrode material by an electrolyte, so that more lithium/sodium ions are disembedded from an active substance, and the capacity of a lithium/sodium ion battery is increased; the material has larger interlayer spacing, rapid movement of lithium/sodium ions in the charge-discharge process is guaranteed, and the cycle stability of the lithium/sodium ion battery is improved.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a copper sulfide micron flower material assisted by halogen ions and its preparation method and application. Background technique [0002] In the past few decades, with the progress of the times and economic development, people's demand for energy has also increased day by day. The continuous burning of fossil fuels and other traditional energy sources (such as oil, coal and natural gas) has become the focus of global warming. To mitigate the surge in greenhouse gases, countries around the world are scrambling to harness renewable sources such as solar, wind, hydroelectric and geothermal energy, which could theoretically provide endless energy without sacrificing the environment. However, these intermittent energy sources are largely dependent on the natural conditions of the event (such as sunlight, rain, wind, and geographical location); therefore, novel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/36H01M10/0525H01M10/054H01G11/30H01G11/86
CPCY02E60/10
Inventor 张小俊潘中昊蔡国辉
Owner ANHUI NORMAL UNIV
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