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A nanosheet array nickel cobaltate-carbon composite material and its preparation method and application

A technology of nanosheet array and carbon composite material, which is applied in the field of nanosheet array nickel cobaltate-carbon composite material and its preparation, can solve the problems of poor electrical conductivity, environmental protection, and high cost, and achieve improved electrical conductivity and large specific surface area , the effect of high specific capacitance

Inactive Publication Date: 2019-09-06
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on the problems of poor electrical conductivity, high cost, and non-environmental protection in composite materials in the prior art, the object of the present invention is to provide a method for preparing nanosheet array nickel-carbon cobaltate-carbon composite materials using wet wipes as templates and its Nanosheet Array Nickel Cobalt Oxide-Carbon Composite Materials Prepared

Method used

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  • A nanosheet array nickel cobaltate-carbon composite material and its preparation method and application
  • A nanosheet array nickel cobaltate-carbon composite material and its preparation method and application
  • A nanosheet array nickel cobaltate-carbon composite material and its preparation method and application

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Embodiment 1

[0041] This implementation provides a method for preparing a nanosheet array nickel cobaltate-carbon composite material, the method comprising the following steps:

[0042] (1) Put the wet wipes (the SEM picture is as follows figure 1 shown) cut into 1.0cm×1.0cm squares, immersed in 1mol / L hydrochloric acid solution, acetone solution, absolute ethanol solution and deionized water solution in sequence, respectively, and ultrasonically removed the remaining oil stains and other stains on the surface of the wet wipes For residues, the ultrasonic treatment power was 250W, and the ultrasonic treatment time was 10 minutes; the wet wipes after ultrasonic treatment were dried in a vacuum oven at 60° C. for 12 hours to obtain wet wipe fibers.

[0043] (2) 1.1632g of Ni(NO 3 ) 2 ·6H 2 O(2mM), 2.3280g of Co(NO 3 ) 2 ·6H 2 O (4mM), 0.3856g (6.4mM) of urea and 2.4672g of HMT (8.8mM) were added to 40mL of deionized water and 20mL of absolute ethanol, magnetically stirred at room tempe...

Embodiment 2

[0049] This implementation provides a method for preparing a nanosheet array nickel cobaltate-carbon composite material, the method comprising the following steps:

[0050] (1) Put the wet wipes (the SEM image is as shown in figure 1 shown) cut into 1.0cm×1.0cm squares, immersed in 1mol / L hydrochloric acid solution, acetone solution, absolute ethanol solution and deionized water solution in sequence, respectively, and ultrasonically removed the remaining oil stains and other stains on the surface of the wet wipes For residues, the ultrasonic treatment power was 250W, and the ultrasonic treatment time was 10 minutes; the wet wipes after ultrasonic treatment were dried in a vacuum oven at 60° C. for 12 hours to obtain wet wipe fibers.

[0051] (2) 1.1632g of Ni(NO 3 ) 2 ·6H 2 O(2mM), 2.3280g of Co(NO 3 ) 2 ·6H 2 O (4mM), 0.3856g (6.4mM) of urea and 2.4672g of HMT (8.8mM) were added to 40mL of deionized water and 20mL of absolute ethanol, magnetically stirred at room temper...

Embodiment 3

[0058] This implementation provides a method for preparing a nanosheet array nickel cobaltate-carbon composite material, the method comprising the following steps:

[0059] (1) Put the wet wipes (the SEM image is as shown in figure 1 shown) cut into 1.0cm×1.0cm squares, immersed in 1mol / L hydrochloric acid solution, acetone solution, absolute ethanol solution and deionized water solution in sequence, respectively, and ultrasonically removed the remaining oil stains and other stains on the surface of the wet wipes For residues, the ultrasonic treatment power was 250W, and the ultrasonic treatment time was 10 minutes; the wet wipes after ultrasonic treatment were dried in a vacuum oven at 60° C. for 12 hours to obtain wet wipe fibers.

[0060] (2) 1.1632g of Ni(NO 3 ) 2 ·6H 2 O(2mM), 2.3280g of Co(NO 3 ) 2 ·6H 2 O (4mM), 0.3856g (6.4mM) of urea and 2.4672g of HMT (8.8mM) were added to 40mL of deionized water and 20mL of absolute ethanol, magnetically stirred at room temper...

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Abstract

The invention provides a nanosheet array nickel cobalt oxide-carbon composite material, a method for preparing the same and application of the same. The method comprises the steps of: performing ultrasonic processing on wet tissues and obtaining wet tissue fibers after drying; adding nickel nitrate, cobalt nitrate, urea and hexamethylenetetramine into an ethanol aqueous solution to obtain a mixedsolution; soaking the wet tissue fibers into the mixed solution and then performing a hydrothermal reaction to obtain a wet tissue fiber base body carrying an Ni-Co precursor; performing a heating calcination reaction on the wet tissue fiber base body in a mixed gas atmosphere and, after cooling, obtaining the nanosheet array nickel cobalt oxide-carbon composite material. The method utilizes wet tissues which are common in daily life as templates, so that waste in life can be effectively utilized; the material is simple in operation method and is environmentally-friendly and the materials areeasy to obtain; the material has a broad application prospect in fields such as clean energy and catalysis. As an electrode of a super capacitor, the material has high specific capacitance and excellent circulation stability.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, and in particular relates to a nickel cobaltate-carbon composite material with nanosheet arrays, a preparation method and application thereof. Background technique [0002] Due to its good electrical conductivity, large specific surface area, low density and excellent electrochemical stability, carbon nanotubes have very broad application prospects in the fields of catalytic carriers, lithium-ion batteries, supercapacitors and fuel cells. [0003] Due to more oxidation states and better electrical conductivity, double metal oxides have better performance than single metal oxides. Its low price, abundant resources and environmental friendliness make it have broad application prospects in the fields of supercapacitors, lithium-ion batteries and fuel cells. Nickel cobaltate has attracted widespread attention due to its excellent properties. Researchers have prepared nickel cobalt oxide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/44H01G11/86B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/24H01G11/30H01G11/44H01G11/86Y02E60/13
Inventor 杨峰张晓峰崔立山
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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