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Preparation method of a foamed nickel-based carbon onion array embedded with metal oxides

A technology of oxides and carbon onions, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of general stability, reduced electrochemical performance, low energy density, etc., and achieve inhibition volume Effects of swelling, improving electrical conductivity, and increasing chemical stability

Active Publication Date: 2019-11-05
吉林长玉特陶新材料技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The energy density of traditional conductive materials in lithium batteries is low, the stability is average, and the traditional conductive paste coating technology will lead to the disadvantage of reduced electrochemical performance

Method used

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  • Preparation method of a foamed nickel-based carbon onion array embedded with metal oxides
  • Preparation method of a foamed nickel-based carbon onion array embedded with metal oxides
  • Preparation method of a foamed nickel-based carbon onion array embedded with metal oxides

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preparation example Construction

[0033] Such as Figure 1-2 As shown, the present invention provides a method for preparing a foam nickel-based embedded metal oxide carbon onion array, which is characterized in that it comprises the following steps:

[0034] Step 1. Add the raw materials nitrate, ammonium fluoride, and urea into a polytetrafluoroethylene-lined reactor filled with deionized water, place the foamed nickel disc on the liquid surface of the reactor, and place the foamed nickel disc on the liquid surface of the reactor. The top is covered with adhesive tape, and the closed reactor is placed in a constant temperature drying oven for hydrothermal reaction;

[0035] Step 2. After the hydrothermal reaction is completed, a foamed nickel disc with a basic carbonate nanowire array is obtained, which is cleaned several times and placed in a muffle furnace for annealing to obtain a foamed nickel-based oxide nanowire array;

[0036] Step 3. Place the foamed nickel-based oxide nanowire array in a horizontal...

Embodiment 10

[0060] A foam nickel-based FeO@CNOs array, the implementation steps are as follows:

[0061] Weigh 2 parts of ferric nitrate, 6 parts of ammonium fluoride, and 10 parts of urea in molar ratio and add them to a polytetrafluoroethylene-lined reactor filled with 2000 parts of deionized water. Take a nickel foam disk with a radius of 6mm and wash it with absolute ethanol and dilute hydrochloric acid for 30 minutes, then use a tablet machine to press its thickness to 0.4mm, place it on the liquid surface of the reaction kettle, and coat its top with polytetrafluoroethylene tape . The closed reaction kettle was placed in a constant temperature drying oven for hydrothermal reaction.

[0062] Take out the foamed nickel disc loaded with the basic iron carbonate nanowire array, wash it with deionized water and absolute ethanol for 3-5 times, and then place it in a muffle furnace and anneal at 200°C for 2h in an air atmosphere , to prepare foamed nickel-based xFeO·yFe 2 o 3 array of ...

Embodiment 11

[0065] A foam nickel-based NiO@CNOs array, the implementation steps are as follows:

[0066] Weigh 2 parts of nickel nitrate, 4 parts of ammonium fluoride, and 10 parts of urea in molar ratio and add them to a polytetrafluoroethylene-lined reactor filled with 2500 parts of deionized water. Take a nickel foam disk with a radius of 5mm and wash it with absolute ethanol and dilute hydrochloric acid for 30 minutes, then use a tablet machine to press its thickness to 0.5mm and place it on the liquid surface of the reaction kettle, and coat the top with polytetrafluoroethylene tape . The closed reaction kettle was placed in a constant temperature drying oven for hydrothermal reaction.

[0067] Take out the foamed nickel disc loaded with the basic nickel carbonate nanowire array, wash it with deionized water and absolute ethanol for 3-5 times, and then place it in a muffle furnace and anneal at 300°C for 2h in an air atmosphere , The NiO foamed nickel-based nanowire arrays were pre...

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Abstract

The invention discloses a preparation method for foamed nickel-based metal oxide-embedded carbon onion arrays. The preparation method comproises the steps that 1, raw materials comprising nitrate, ammonium fluoride and urea are added into a polytetrafluoroethylene-lined reaction kettle containing deionized water, foamed nickel wafers are arranged on the liquid surface of the reaction kettle, the tops of the foamed nickel wafers are coated with adhesive tape, and the reaction kettle is sealed and placed in a constant temperature drying oven for a hydrothermal reaction; 2, after the hydrothermalreaction is finished, the foamed nickel wafers loaded with basic carbonate nanowire arrays are obtained and annealed in a muffle furnace, and foamed nickel-based oxide nanowire arrays are obtained; 3, the foamed nickel-based oxide nanowire arrays are placed in a horizontal tube furnace, carbon source gas and high-purity argon carrier gas are introduced, the temperature is raised to 350 DEG C, after reacting for 30 minutes, the carbon source gas stops from being introduced, heating is stopped, the high-purity argon continues to be introduced until the tube furnace is cooled to room temperature, and the foamed nickel-based metal oxide-embedded carbon onion arrays are prepared. The arrays prepared by using the method is high in cycling stability.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation technology, in particular to a method for preparing a foamed nickel-based carbon onion array embedded with metal oxides. Background technique [0002] In recent years, the development of new energy vehicles has vigorously promoted the development of high-performance lithium-ion secondary batteries with high energy density, long life, and environmental protection. Metal oxides usually have high capacity as lithium battery anode materials, but their cycle stability and energy decay are serious, which limits their further development; at the same time, most metal oxides (such as MnO 2 、Co 3 o 4 , CoO, NiO and V 2 o 5 ) belongs to a wide bandgap semiconductor or insulator, so its conductivity is very low, which makes it generate a lot of heat during the charge and discharge process when it is used as an electrode material, causing safety problems. In order to solve these problems...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C1/08C22C19/03B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C22C1/08C22C1/101C22C1/1078C22C19/03
Inventor 王玉金阮超张翰超谢芳王诗阳
Owner 吉林长玉特陶新材料技术股份有限公司
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