Preparation method for supramolecular graphene load ferroferric oxide self-assembly body

Abstract

The invention discloses a preparation method for a supramolecular graphene load ferroferric oxide self-assembly body, and belongs to the technical field of supramolecular chemistry. The method enables Fe3O4 to be disposed on the surface of graphene through the combination with the redox reaction of Fe3O4, thereby further improving the capacitive property. According to the invention, polyethylene glycol 2-adamantane is taken as a bridge agent, and then a supramolecular action force between cyclodextrin and adamantine molecules is employed. A prepared graphene @ ferroferric oxide three-dimensional assembly body not only solves a problem that the convergence of a graphene body causes the reduction of capacitance, but also greatly increases the specific capacitance which can reach 392.9 F / g, thereby indicating that the prepared graphene @ ferroferric oxide three-dimensional assembly body is good in application prospect for super-capacitors.

Description

technical field [0001] The invention belongs to the field of preparation of nanocomposite materials, in particular to the technical field of supramolecular chemistry, and in particular to the technical field of supercapacitor material preparation. Background technique [0002] Electrochemical capacitors (or known as supercapacitors) have attracted increasing attention in energy storage, mainly due to their high energy density and high specific capacitance, as well as good cycle life. Therefore, the electrochemical capacitor will effectively assist and even possibly replace batteries in many applications, such as in hybrid vehicles. [0003] So far, there are mainly carbon materials, transition metal oxides and conductive polymers. These three materials can generally be used as electrode materials for supercapacitors. Carbon materials are mainly used for electric double layer capacitors. The energy storage process of this material charge is very Faraday process, energy stora...

AI Technical Summary

Problems solved by technology

[0005] In order to solve Fe 3 o 4 Due to the low conductivity and poor stability of graphene and Fe 3 o 4 Combined to prepare composite materials, by combining Fe 3 o 4 Redox reaction with graphene's high specific surface area and high conductivity to improve electrochemical performance

[0006] However, the severe aggregation of graphene leads to a sharp decrease in its specific surface area, which limits its application in supercapacitors.

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