Graphene composite material for photoconversion and energy storage and preparation method

Abstract

The invention discloses a graphene composite material for photoconversion and energy storage and a preparation method. The method comprises the steps of: employing graphite as a raw material, firstly, infiltrating phenyl ammonium salt cations between graphite layers; introducing positively charged impurities between the graphite layers through the electrophilic effect of a pi bond between the graphite layers, blending the positively charged impurities and a metal cation salt and carrying out ion exchange reaction on a benzyl ammonium salt and the metal cation salt; and decomposing the salt through warming to obtain nano metal oxide particles under the protection of an inert gas. The problems that graphene and the oxide particles are easily agglomerated and cannot be evenly dispersed, the preparation technology is complicated, the equipment requirement is high and the like in the prior art are solved. Two processes of mechanical stripping and nano material compounding are merged into one, so that the cost is greatly reduced; the technology is simplified; and the preparation method is suitable for a continuous industrial production technology, compatible with a technology for mechanically stripping the graphene and suitable for partial established companies for direct production.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a graphene composite material for light conversion and energy storage and a preparation method. Background technique [0002] Graphene is considered an ideal material for its large specific surface area, excellent electrical and thermal conductivity and low thermal expansion coefficient, especially its good electrical conductivity and large specific surface. There are also important uses. The blending of graphene and oxide powder doped polymer materials has increasingly become a research hotspot in the field of functional polymer materials, and graphene and oxide powder are important functional additives. [0003] Chinese Patent Publication No. 103804877A provides a method for preparing a polymer material with electrical conductivity and light conversion and energy storage functions. In this method, graphene and titanium dioxide doped system powder and res...

AI Technical Summary

Problems solved by technology

This method combines the two processes of mechanical exfoliation and nanomaterial compounding into one, which greatly reduces the cost and simplifies the process. It is suitable for continuous industrial production processes, compatible with the process of mechanical exfoliation of graphene, and also solves the problem of graphene and oxides. Particles are easy to agglomerate, the two are unevenly dispersed, the preparation process is complicated, and the equipment requirements are high. It is suitable for some companies with existing foundations to directly put into production.