Synthesis,Characterization,and Electrochemical Properties of Mn3O4/Cr2O3 Composite

摘要

Mn3O4/Cr2O3 composite materials were prepared by a chemical coprecipitation method.The structures were characterized by using SEM and XRD,and the supercapacitive behaviors of these composite materials were investigated with cyclic voltammetry (CV)and charge-discharge tests.Morphology of Mn3O4/Cr2O3 composite materials showed that the Mn3O4/Cr2O3 composite materials containning a small amount of Cr2O3 has a better dispersion compared with that containning a lage amount of it.Owing to the higher surface area and poor crystallization,the Mn3O4/Cr2O3 composite materials containning a small amount of Cr2O3 show much higher specific capacitance (The highest specific capacitance value of 494 F/g was obtained),and were more promising for applications in supercapacitors.