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Core-shell structure composite material composed of transition metal oxide grown on nickel foam in situ and metal organic skeleton

A metal-organic framework and in-situ growth technology, applied in the field of materials science, can solve problems such as poor electronic conductivity, and achieve the effects of easy operation, easy operation, and increased specific capacitance

Inactive Publication Date: 2019-04-19
LIAONING UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at a series of shortcomings such as poor electronic conductivity of the existing transition metal oxides, the purpose of the present invention is to provide a self-supporting, bendable Preparation method of composite electrode material for flexible supercapacitor and flower-shaped core-shell structure

Method used

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  • Core-shell structure composite material composed of transition metal oxide grown on nickel foam in situ and metal organic skeleton
  • Core-shell structure composite material composed of transition metal oxide grown on nickel foam in situ and metal organic skeleton
  • Core-shell structure composite material composed of transition metal oxide grown on nickel foam in situ and metal organic skeleton

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Embodiment 1

[0034] Example 1 Core-shell structure composite material composed of transition metal oxide and metal-organic framework grown in situ on nickel foam (1) Preparation of CoO@Ni:

[0035] Add 0.05mmol of cobalt nitrate, 0.3mmol of urea, and 0.2mmol of ammonium fluoride into 2mL of deionized water, stir and mix evenly to obtain a mixed solution, and clean nickel foam (1×1.5cm 2 ) into the mixed solution, and then transfer the nickel foam and the mixed solution to a polytetrafluoroethylene autoclave with a volume of 10 mL. The reactor was sealed and placed in an oven. Heat the temperature of the oven from room temperature to 100°C at a rate of 2°C min -1 , and keep the temperature under this condition for 10 hours. Slowly cool to room temperature and let it stand for at least 1 day to obtain nickel foam coated with dark red precipitate; filter, wash with water and ethanol in sequence, and dry in air at 60°C for 6 hours, transfer the obtained product to a tube furnace, heat up Ca...

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Abstract

The invention relates to core-shell structure composite material composed of a transition metal oxide grown on nickel foam in situ and a metal organic skeleton. The preparation method of the core-shell structure composite material includes the steps: preparing a self-assembled flower-like CoO cluster of nanowire arrays grown on nickel foam, then preparing ZIF-67@CoO with a core-shell structure, grown on the nickel foam, and finally preparing Co / C-N@CoO with a core-shell structure, grown on the nickel foam. Compared with the prior art, the preparation method has high purity, good dispersibilityand controllability in the prepared products, is simple the process steps and is easy to operate. The prepared transition metal oxide and metal organic skeleton composite material with the core-shellstructure is grown on the nickel foam substrate, can be directly used as an electrode material of a supercapacitor, has excellent capacitance performance, and can be applied to high stability, wearable electronic devices and other occasions.

Description

technical field [0001] The invention belongs to the field of materials science, and specifically relates to a composite material with a core-shell structure composed of a flower-like transition metal oxide and a metal-organic framework formed by a nanowire array grown on a nickel foam in situ, a preparation method thereof and an applications in supercapacitors. Background technique [0002] With the continuous development of portable electronic devices, the research on electric energy storage and release has become a research hotspot of scientists from all over the world. In order to meet the needs of users, portable electronic devices are developing towards light, small, flexible, foldable, and even wearable. A supercapacitor is an energy storage device composed of an electrode, an electrolyte and a current collector. It is a new type of energy storage device whose performance is between that of a battery and a traditional capacitor. Compared with traditional capacitors, ...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/46H01G11/86
CPCH01G11/24H01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 韩正波曹小漫
Owner LIAONING UNIVERSITY
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