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Graphene-like carbon-coated nickel selenide composite material and preparation method thereof

A graphene carbon and composite material technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of harsh reaction conditions, complex solvent method steps, etc., and achieve a simple preparation method, few by-products, and easily controllable reaction conditions. Effect

Active Publication Date: 2019-06-18
JIANGSU UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the problems of complex steps and harsh reaction conditions of the solvent method used in the above-mentioned prior art, the present invention provides a simple one-step method, easy control of reaction conditions, industrial production and preparation of graphene-like carbon-coated nickel selenide composite materials and its preparation method, the prepared material is applied to the battery positive electrode material in the field of electrochemistry

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  • Graphene-like carbon-coated nickel selenide composite material and preparation method thereof
  • Graphene-like carbon-coated nickel selenide composite material and preparation method thereof
  • Graphene-like carbon-coated nickel selenide composite material and preparation method thereof

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Effect test

Embodiment 1

[0029] Add 0.374g of nickelocene and 0.16g of selenium powder into a 20ml stainless steel autoclave, seal it and place it in a crucible furnace capable of temperature programming. The furnace temperature rises from room temperature to 700°C, then maintained at 700°C for 10 hours, then cooled naturally to room temperature, collected the black deposits stuck on the inner surface of the kettle wall, washed them with distilled water and absolute ethanol for several times, and obtained graphene-like carbon packets after filtration. Coated nickel selenide nanomaterials. The yield of product-like graphene carbon-coated nickel selenide is 90%.

[0030] The product was dried in a vacuum oven at 50°C for 4 hours, and finally collected for characterization. Its shape and properties are as Figure 1~4 .

[0031] Depend on figure 1 It can be seen that in the X-ray diffraction spectrum, there are all diffraction peaks at 2θ at 10° to 80°, among which the diffraction intensity is high an...

Embodiment 2

[0036] Add 0.374g of nickelocene and 0.16g of selenium powder into a 20ml stainless steel autoclave, seal it and place it in a crucible furnace capable of temperature programming. The furnace temperature rises from room temperature to 600°C, then maintained at 600°C for 5 hours, then cooled naturally to room temperature, collected the black deposits stuck to the inner surface of the kettle wall, washed them with distilled water and absolute ethanol for several times, and obtained graphene-like carbon packets after filtration. Coated nickel selenide nanomaterials. The yield of product-like graphene carbon-coated nickel selenide is 80%.

[0037] The product was dried in a vacuum oven at 50°C for 4 hours, and finally collected for characterization. Its shape and characteristics are as Figure 5-6 shown.

[0038] Depend on Figure 5 It can be seen that in the X-ray diffraction spectrum, there are all diffraction peaks at 2θ at 10° to 80°, among which the diffraction intensity ...

Embodiment 3

[0041] Add 0.374g of nickelocene and 0.16g of selenium powder into a 20ml stainless steel autoclave, seal it and put it into a crucible furnace capable of temperature rise. The furnace temperature rises from room temperature to 650°C, then maintained at 650°C for 15 hours, then cooled naturally to room temperature, collected the black deposits stuck on the inner surface of the kettle wall, washed them with distilled water and absolute ethanol for several times, and obtained graphene-like carbon packets after filtration. Coated nickel selenide nanomaterials. The yield of product class graphene nickel selenide is 85%.

[0042] The product was dried in a vacuum oven at 50°C for 4 hours, and finally collected for characterization. Its shape and characteristics are as Figure 7-8 shown.

[0043] Depend on Figure 7 It can be seen that in the X-ray diffraction spectrum, there are all diffraction peaks at 2θ at 10° to 80°, among which the diffraction intensity is high and the pea...

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Abstract

The invention discloses a graphene-like carbon-coated nickel selenide composite material and a preparation method thereof. According to the method, a one-step calcining method is adopted for preparinga carbon-coated nickel selenide composite material; nickelocene and selenium powder are mixed uniformly and put into a reactor; and the temperature is increased to 600-700 DEG C for carrying out a calcination reaction for 5-15 hours so as to obtain the carbon-coated nickel selenide composite material. According to the method, one-step calcination synthesis is realized, the operation is simple, the reaction conditions are easy to control, and the method is more suitable for industrial production. The graphene-like carbon-coated nickel selenide composite material prepared from a nickel source and a selenium source in the method is few in byproduct and high in product yield. The composite material prepared with the method is applied to a battery positive electrode material, so that the battery capacity retention rate can reach 92%.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a graphene-like carbon-coated nickel selenide composite material and a preparation method and application thereof. Background technique [0002] Nickel selenide (NiSe), as an important semiconductor, is considered as a promising material for tandem solar cells and detection of visible radiation. It is also considered a less toxic and more environmentally responsible alternative to related narrow-bandgap lead- or cadmium-based semiconductors. To date, most studies on the synthesis of NiSe have focused on its bulk materials, such as solid-state synthesis, molecular precursors, direct reaction of elements, ultrasonic synthesis, and mechanical alloying (MA). [0003] In recent years, some pioneering work has also been carried out on NiSe nanostructures. For example, Sobhani et al. synthesized NiSe nanoparticles based on the hydrothermal method of CTAB. Yu et al. prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62
CPCY02E60/10
Inventor 张开龙潘红琳王迪王莉江钰程世昌刘生财窦雨琴王良彪
Owner JIANGSU UNIV OF TECH
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