Novel compounding method of carbon material and transition metal compound, composite material and application

Abstract

The invention belongs to the technical field of material compounding, and particularly relates to a novel compounding method of a carbon material and a transition metal compound, a composite material and application. The novel compounding method of the carbon material and the transition metal compound comprises the following steps: firstly, synthesizing an iron-cobalt MOF precursor through a hydrothermal method; then carrying out high-temperature carbonization treatment on the iron-cobalt MOF precursor to form an iron-cobalt alloy carbon nanotube doped composite material; and finally, carrying out high-temperature selenylation treatment on the obtained iron-cobalt alloy carbon nanotube doped composite material to obtain the FeSe2 / CoSe2@CNT composite material. The novel compounding method is simple and convenient in process and relatively high in dispersity, and the obtained FeSe2 / CoSe2-@CNT composite material has relatively high specific capacitance, stable rate capability and relatively large pseudocapacitance contribution when being applied to a sodium-ion battery.

Description

technical field [0001] The invention belongs to the technical field of material compounding, and in particular relates to a novel compounding method, compound material and application of a carbon material and a transition metal compound. Background technique [0002] With the development of science and technology, the production technology of electronic equipment continues to improve. Lithium-ion batteries are widely used in energy storage equipment, various portable electronic equipment and automotive fields. The requirements for energy storage are getting higher and higher. The larger the world's limited lithium metal resources are depleted faster. In order to solve the problems of high cost of lithium-ion batteries and insufficient lithium resources, people have been studying sodium-ion batteries, which have a very similar energy storage mechanism. Sodium is rich in resources and cheap, and it is easier to prepare, especially the standard electrode potential of sodium ( ...

AI Technical Summary

Problems solved by technology

At present, there are certain deficiencies in the common methods of introducing carbon materials, for example, by coating a layer of carbon materials on the surface of transition metal compound nanoparticles, and then undergoing high-temperature carbonization to obtain graphitic carbon. It can improve its conductivity when used as a battery material, but it also reduces the contact area between nanoparticles and electrolyte, thereby reducing its active sites and affecting the activity of catalytic reactions.

In addition, composite materials are formed by loading nanoparticles on the surface of carbon materials, such as loading transition metal compound nanoparticles on the surface of graphene. Although this method can increase the reactivity of the material, it generally requires multiple steps of synthesis and makes the process complicated. , which further increases the difficulty and cumbersomeness of the process, and it is usually difficult to evenly distribute nanoparticles on the surface of carbon materials, and it is difficult to obtain ideal dispersion

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