A preparation method of cobalt manganese oxide nanoflower-carbon sponge flexible composite material

Abstract

The invention belongs to the field of functionalized porous nanomaterials, and in particular relates to a preparation method of a cobalt manganese oxide nanoflower-carbon sponge flexible composite material; the specific steps are: take a commercial melamine sponge, then clean it with distilled water and absolute ethanol, dry it, and then Under a nitrogen or argon atmosphere, heat up the melamine sponge to obtain a carbon sponge after cooling; prepare a mixed solution containing manganese salts and cobalt salts, immerse the carbon sponge in the mixed solution, and perform a hydrothermal reaction. After the reaction, take out the carbon The sponge is washed with distilled water and dried to obtain a manganese-cobalt hydroxide precursor-carbon sponge composite material; further annealing reaction is carried out under an argon atmosphere to obtain a cobalt oxide manganese nanoflower-carbon sponge flexible composite material; the present invention uses flexible , Porous, self-supporting carbon sponge as a growth template successfully solves the problem of easy agglomeration of nanomaterials; and the obtained composite material has a large number of exposed active sites, rich 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...

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.

Images