Graphene load flower manganese dioxide (MnO2) composite material and ultrasonic synthetic method thereof

一种石墨烯负载花状二氧化锰复合材料及其超声合成方法

Abstract

The invention relates to a graphene load flower manganese dioxide (MnO2) composite material and an ultrasonic synthetic method thereof. The graphene load flower MnO2 composite material is characterized in that flower MnO2 is composite with graphene layers, and the flower MnO2 is composed of a plurality of flakes which are mutually assembled. Graphene is used as a matrix skeleton and has favorable conductibility, and the flower MnO2 can have favorable conductibility through the graphene layers, thereby increasing the apparent conductivity of the composite material. The diameter of the flower MnO2 growing on both sides of the graphene is from 100 to 300 nm, and the thickness of each flake is from 1 to 10 nm. The material is prepared by the following two typical steps of preparing pyrolytic graphene and ultrasonically synthesizing the graphene load flower MnO2 composite material. The graphene load flower MnO2 composite material prepared by using the ultrasonic synthetic method has the advantages of simple process, high electrode capacitance and good cycle performance and is suitable for electrode materials of super capacitors.
本发明涉及一种石墨烯负载花状二氧化锰复合材料及其超声合成方法。其典型的特征为花状MnO2与石墨烯片层的复合,而花状二氧化锰又是由许多薄片相互组装而成。石墨烯作为基体骨架其具有良好的导电性,花状二氧化锰可以通过石墨烯片层实现良好的导电性,从而提高了复合材料的表观电导率。生长在石墨烯两侧的花状二氧化锰直径为100~300nm,薄片的厚度为1~10nm。该材料制备经过两个典型步骤,一是制备热解石墨烯,二是超声合成石墨烯负载花状二氧化锰复合材料。本发明方法制备的石墨烯负载花状二氧化锰复合材料工艺简单,电极电容高、循环性能好,适用于超级电容器电极材料。

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