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Flexible self-supported porous carbon @ layered bimetallic hydroxide composite material, its preparation method and application

A layered bimetallic, hydroxide technology, applied in the field of composite materials, can solve the problems of graphene agglomeration, complex process, reduced process efficiency, etc., achieve high specific capacitance value and rate characteristics, simple preparation process, and facilitate rapid transmission. Effect

Active Publication Date: 2017-01-11
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN105514450A discloses a method for preparing nitrogen-doped graphene / nickel-iron double metal hydroxide. The process is to synthesize double metal hydroxide in situ by hydrothermal method in graphite oxide suspension and dope Nitrogen nanosheets have a simple preparation method and are convenient for large-scale production. However, LDH stacking is still serious in the composite materials prepared by this method, which may be due to the inability of graphene to effectively support LDH sheets.
However, graphene is prone to agglomeration during the preparation process, and LDH will directly nucleate and grow in the liquid phase, making its composite with graphene inhomogeneous, thus limiting its electrochemical performance.
[0005] It can be seen from the above patents that the above-mentioned carbon material@layered double metal hydroxide electrode material still has some problems such as serious LDH sheet stacking, long preparation cycle, and complicated process, which limit its performance as a supercapacitor electrode material. At the same time Increase the cost of the process and reduce the efficiency of the process

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  • Flexible self-supported porous carbon @ layered bimetallic hydroxide composite material, its preparation method and application
  • Flexible self-supported porous carbon @ layered bimetallic hydroxide composite material, its preparation method and application
  • Flexible self-supported porous carbon @ layered bimetallic hydroxide composite material, its preparation method and application

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Embodiment 1

[0031] Take a block of melamine sponge and place it in a tube furnace, pass in argon gas as a protective atmosphere, raise the temperature to 800°C at a heating rate of 2°C / min, carbonize for 2h, then cool down naturally to room temperature, and take it out for later use. Weigh 0.175g Ni(NO 3 ) 2 ·6H 2 O, 0.088gCo(NO 3 ) 2 ·6H 2 O. 0.126g of urea was dissolved in 60mL of deionized water to obtain a metal salt solution. Weigh 24mg of porous carbon and immerse in the metal salt solution, transfer to a 100mL hydrothermal reaction kettle, and react at 100°C for 24 hours. After cooling to room temperature, the product was collected by suction filtration, washed with excess deionized water until neutral, and dried in a vacuum oven at 60°C to obtain the product. The obtained product was used as the active component of the supercapacitor electrode, and 2 mg of flexible self-supporting porous carbon@layered double metal hydroxide composite material was clipped and clamped by the ...

Embodiment 2

[0033] Take a block of melamine sponge and place it in a tube furnace, pass in argon gas as a protective atmosphere, raise the temperature to 800°C at a heating rate of 2°C / min, carbonize for 2h, then cool down naturally to room temperature, and take it out for later use. Weigh 0.175g Ni(NO 3 ) 2 ·6H 2 O, 0.076gMn(NO 3 ) 2 4H 2O. 0.126g of urea was dissolved in 60mL of deionized water to obtain a metal salt solution. Weigh 24mg of porous carbon and immerse in the metal salt solution, transfer to a 100mL hydrothermal reaction kettle, and react at 100°C for 24 hours. After cooling to room temperature, the product was collected by suction filtration, washed with excess deionized water until neutral, and dried in a vacuum oven at 60°C to obtain the product. The obtained product was used as the active component of the supercapacitor electrode, and 2 mg of flexible self-supporting porous carbon@layered double metal hydroxide composite material was clipped and clamped by the el...

Embodiment 3

[0035] Take a block of melamine sponge and place it in a tube furnace, pass in argon gas as a protective atmosphere, raise the temperature to 800°C at a heating rate of 2°C / min, carbonize for 2h, then cool down naturally to room temperature, and take it out for later use. Weigh 0.175g Co(NO 3 ) 2 ·6H 2 O, 0.076gMn(NO 3 ) 2 4H 2 O. 0.126g of urea was dissolved in 60mL of deionized water to obtain a metal salt solution. Weigh 24mg of porous carbon and immerse in the metal salt solution, transfer to a 100mL hydrothermal reaction kettle, and react at 100°C for 24 hours. After cooling to room temperature, the product was collected by suction filtration, washed with excess deionized water until neutral, and dried in a vacuum oven at 60°C to obtain the product. The obtained product was used as the active component of the supercapacitor electrode, and 2 mg of flexible self-supporting porous carbon@layered double metal hydroxide composite material was clipped and clamped by the e...

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Abstract

The invention belongs to the technical field of composite materials and more particularly, to a flexible self-supported porous carbon @ layered bimetallic hydroxide composite material, its preparation method and application. The preparation method comprises the following steps: 1) placing melamine sponge into a tubular furnace and obtaining a self-supported porous carbon skeleton after high temperature carbonation; and 2) dissolving two kinds of metal salt and precipitating agent into de-ionized water for a metal-and-salt solution, and then immersing the porous carbon skeleton materials prepared in the step (1) into the metal-and-salt solution so that it undergoes processes of nucleating and growing under a hydrothermal condition, and filtering, washing, and drying. The preparation equipment and the technology are both simple and convenient. The prepared flexible self-supported porous carbon @ layered bimetallic hydroxide composite material, with rapid transmission channels for electrons and ions, can achieve good elasticity and flexibility, high specific capacitance and good rate characteristics.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a flexible self-supporting porous carbon@layered double metal hydroxide composite material for supercapacitors and its preparation method and application. Background technique [0002] With the rapid increase in the use of portable electronic devices, electric vehicles, and hybrid electric vehicles, the demand for energy storage devices with high power density and high energy density is increasing. Supercapacitors have attracted extensive attention due to their higher power density than batteries and higher energy density than conventional capacitors. Especially with the rapid development of wearable electronic devices, flexible capacitors have aroused strong research interests of scientists. The energy storage methods of supercapacitors are mainly divided into two types: electric double layer energy storage - using electrolyte ions to adsorb on the elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/44H01G11/30H01G11/86
CPCH01G11/24H01G11/30H01G11/44H01G11/86Y02E60/13
Inventor 邢伟李学进高秀丽白鹏刘振王有和阎子峰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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