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Bimetallic composite material with open 3D structure and preparation method and application thereof

A composite material and bimetal technology, which is applied in the field of bimetallic composite materials with open 3D structure and their preparation, can solve the problems of large volume effect and poor stability, and achieve the effect of good electrochemical performance and large application potential.

Active Publication Date: 2020-08-11
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an electrode material for battery-type hybrid capacitors, nickel phosphide has obvious advantages and disadvantages
The advantage is that it has metal-like properties and high electronic conductivity, but the material also has corresponding deficiencies, such as large volume effect, poor stability, etc.

Method used

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  • Bimetallic composite material with open 3D structure and preparation method and application thereof
  • Bimetallic composite material with open 3D structure and preparation method and application thereof
  • Bimetallic composite material with open 3D structure and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1: Dissolve 1.32g 2-methylimidazole in a mixed solution of 40mL absolute ethanol and water (v / v=1:1), and 2mmol (0.582g) Ni(NO 3 ) 2 ·6H 2 O was dissolved in the above solution, stirred at room temperature for 30 min until the solution turned yellow-green, and stood at room temperature for 24 h. The prepared yellow precipitate was washed with absolute ethanol several times to ensure that all ions not involved in the coordination were removed, and the product was centrifuged at a high speed of 10,000r / min, and the centrifuged material was placed in a vacuum oven at 70°C for drying. After 24h, the final product was collected for use in the next step.

[0031] Step 2: Grind the Ni-MOF prepared in the previous step into powder, weigh 0.23g and dissolve it in 30mL of absolute ethanol solution, in which 0.05g of SnCl was dissolved in advance 2 2H 2 O, after stirring at room temperature for 30min, the mixture was transferred to a polytetrafluoroethylene-lined reactor ...

Embodiment 2

[0035] With embodiment 1 step 2) in SnCl 2 2H 2 The amount of O was changed to 0.1g, and other conditions remained unchanged.

[0036] By testing the XRD of the product, it can be seen that the obtained black powder is Sn@Ni 2P / C, through the scanning electron microscope observation, the composite material presents an irregular flower-like structure, the size is about 1um, the irregular flowers are gathered together, and the surface is composed of a large number of small spines

Embodiment 3

[0038] With embodiment 1 step 2) in SnCl 2 2H 2 The amount of O was changed to 0.15g, and other conditions remained unchanged.

[0039] By testing the XRD of the product, it can be seen that the obtained black powder is Sn@Ni 2 P / C, observed by scanning electron microscope, the composite material presents an obvious rod-like structure. With the increase of Sn content, the rod structure is more obvious and larger in size, and even agglomerated structure appears.

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Abstract

The invention discloses a bimetallic composite material with an open 3D structure and a preparation method and application thereof, and belongs to the technical field of material preparation. The preparation process of the Sn-coated Ni2P / C composite material comprises three parts, namely an initial aging process, an intermediate ion exchange process and a subsequent calcining process. Based on thegrowth rule of crystals, a plurality of nano-particles with irregular shapes are formed at normal temperature, then Sn<2+> is introduced, a small amount of Ni<2+> on the surface of a precursor is replaced by Sn<2+>, and meanwhile, the nano-particles begin to grow in the one-dimensional direction to form cylindrical Sn@Ni-MOF. In the final calcining and phase conversion process, PH3 gas generatedby NaH2PO2 is in contact with Ni ions on the cylindrical surface at a high temperature to form Sn-Ni2P / C nanorods, and along with the conversion process, the the Ni ions in the cylindrical shape are converted into Ni2P, so that an original precursor with a cylindrical structure is dissolved, and finally, the micron flower with a three-dimensional open structure consisting of a large number of nanorods is formed.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a bimetallic composite material with an open 3D structure and a preparation method and application thereof. Background technique [0002] With the development of human society and the improvement of living standards, human consumption of energy and resources has reached the limit, which has led to the destruction of the environment and the depletion of non-renewable resources, so it is necessary to vigorously develop new energy technologies and high-performance energy storage devices to resolve this contradiction. As a new type of energy storage device between traditional capacitors and rechargeable batteries, supercapacitors have the advantages of short charging time, large storage capacity, high power density, long cycle life, and wide operating temperature range. and other fields have extremely important applications. In recent years, transition meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/32
CPCH01G11/86H01G11/24H01G11/30H01G11/32
Inventor 刘淑玲崔显胥亚亚
Owner SHAANXI UNIV OF SCI & TECH
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