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Method for preparing cobaltous oxide manganese nano flower/carbon sponge flexible composite material

A composite material, cobalt manganese oxide technology, applied in chemical instruments and methods, nanotechnology, hybrid/electric double layer capacitor manufacturing, etc., can solve the problems of low specific surface area, low conductivity, volume expansion limitation, etc., to achieve rich pores , enhanced electrical conductivity, the effect of ingenious design ideas

Active Publication Date: 2019-04-23
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although transition metal oxides have many advantages, their disadvantages such as low electrical conductivity, low specific surface area, and large volume expansion during charge and discharge limit their applications.

Method used

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  • Method for preparing cobaltous oxide manganese nano flower/carbon sponge flexible composite material
  • Method for preparing cobaltous oxide manganese nano flower/carbon sponge flexible composite material
  • Method for preparing cobaltous oxide manganese nano flower/carbon sponge flexible composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Divide the commercial melamine sponge into strips of 5cm×2cm×0.5cm, clean them with distilled water and absolute ethanol, and then dry them overnight;

[0028] (2) Put the clean melamine sponge in a programmable temperature-controlled tube furnace, and raise the temperature from 25°C to 500°C at a rate of 5°C / min under a nitrogen atmosphere, and keep it for 0.5h, and obtain a carbon sponge after natural cooling ;

[0029] (3) Take ethylene glycol as solvent, add manganese acetate and cobalt acetate, obtain mixed solution; Wherein the concentration of manganese acetate in the mixed solution is 10mM, and the concentration of cobalt acetate is 20mM; Add carbon sponge, transfer to polytetrafluoroethylene lining In the reaction kettle, react at 140°C for 6 hours, wash and dry to obtain the manganese-cobalt oxide precursor-carbon sponge composite material, put it into a tube furnace, and in an argon atmosphere, the temperature is 1°C / min. The heating rate was increased t...

Embodiment 2

[0031] (1) Divide the commercial melamine sponge into strips of 5cm×2cm×0.5cm, clean them with distilled water and absolute ethanol, and then dry them overnight;

[0032] (2) Put the clean melamine sponge in a programmable temperature-controlled tube furnace, and raise the temperature from 25°C to 800°C at a rate of 3°C / min under a nitrogen atmosphere, and keep it for 1.5h, and obtain a carbon sponge after natural cooling ;

[0033] (3) Take ethylene glycol as solvent, add manganese acetate and cobalt acetate, obtain mixed solution; Wherein the concentration of manganese acetate in the mixed solution is 40mM, and the concentration of cobalt acetate is 60mM; Add carbon sponge, transfer to polytetrafluoroethylene lining In the reaction kettle, react at 170°C for 8 hours, wash and dry to obtain the manganese-cobalt oxide precursor-carbon sponge composite material, put it into a tube furnace, and in an argon atmosphere, at a rate of 3°C / min The heating rate was raised to 400°C an...

Embodiment 3

[0036] (1) Divide the commercial melamine sponge into strips of 5cm×2cm×0.5cm, clean them with distilled water and absolute ethanol, and then dry them overnight;

[0037] (2) Put the clean melamine sponge in a temperature-programmed tube furnace, raise the temperature from 25°C to 900°C at a heating rate of 5°C / min under a nitrogen atmosphere, keep it for 3 hours, and obtain a carbon sponge after natural cooling;

[0038] (3) Take ethylene glycol as solvent, add manganese acetate and cobalt acetate, obtain mixed solution; Wherein the concentration of manganese acetate in the mixed solution is 60mM, and the concentration of cobalt acetate is 120mM; Add carbon sponge, transfer to polytetrafluoroethylene lining In the reaction kettle, react at 200°C for 12h, wash and dry to obtain the manganese-cobalt oxide precursor-carbon sponge composite material, put it into a tube furnace, and in an argon atmosphere, at a rate of 5°C / min The heating rate was increased to 450°C and kept for 3...

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Abstract

The invention belongs to the field of functionalized porous nano materials, and particularly relates to a method for preparing a cobaltous oxide manganese nano flower / carbon sponge flexible compositematerial. The method comprises the steps of: taking a commercial melamine sponge, then performing washing with distilled water and absolute ethanol, performing drying, and then performing process temperature rise calcining of the melamine sponge under the nitrogen or argon atmosphere to obtain a carbon sponge after cooling; preparing a mixed solution containing a manganese salt and a cobalt salt,immersing the carbon sponge into the mixed solution for the hydrothermal reaction, taking out the carbon sponge after the reaction is finished, washing the carbon sponge with distilled water and performing drying to obtain a manganese-cobalt hydroxide precursor-carbon sponge composite material; and further, performing annealing reaction in the argon atmosphere to obtain a cobaltous oxide manganesenano flower / carbon sponge flexible composite material. The flexible, porous and self-support carbon sponge is taken as a growth template to successfully solve the problem that the nano material is easily gathered, and the obtained composite material has a lot of exposure active sites, abundant pores and good electrical conductivity.

Description

technical field [0001] The invention belongs to the field of functionalized porous nanometer materials, and in particular relates to a preparation method of cobalt manganese oxide nanoflower-carbon sponge flexible composite material. Background technique [0002] In recent years, with the decline of fossil energy reserves and the increasing environmental problems, people's demand for green and renewable energy has increased dramatically. In the past two decades, people have continuously developed and utilized clean energy such as solar energy, wind energy, and tidal energy and have achieved visible results. However, these energy sources are intermittent and discontinuous, so it is necessary to develop efficient and economical energy storage and conversion devices to store and convert clean energy. Among them, supercapacitors, fuel cells, and lithium-ion batteries are considered to be the three most promising electrochemical energy storage and conversion systems. In order t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/32H01G11/46H01M4/36H01M4/50H01M4/52H01M4/62H01M10/0525B82Y40/00B01J23/889
CPCH01M4/362H01M4/502H01M4/523H01M4/625H01M10/0525H01G11/24H01G11/32H01G11/46H01G11/86B82Y40/00B01J23/002B01J23/8892B01J35/33Y02E60/10
Inventor 黄云鹏崔芬华明清赵岩李华明
Owner JIANGSU UNIV
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