One-pot hydrothermal synthesis of Mn3O4/graphene nanocomposite for supercapacitors

Mn3O4/graphene nanocomposite with the structure of Mn3O4 nanoparticles anchored on graphene sheets was synthesized using a facile in situ one-pot hydrothermal method. The growth of Mn3O4 nanoparticles and the reduction of graphene oxide occurred simultaneously during this hydrothermal process. Hexagonal flake-like Mn3O4 nanoparticles were found well-dispersed on graphene sheets. Cyclic voltammetry (CV), galvanostatic charge discharge (GCD) and electrochemical impedance spectroscopy (EIS) measurements were used to assess the electrochemical properties of Mn3O4/graphene nanocomposite. The Mn3O4/graphene nanocomposite exhibited a specific capacitance of 171 F g(-1) in 1 M Na2SO4 aqueous electrolyte and a good rate property. The results showed that the Mn3O4/graphene nanocomposite could be used as electrode material for high performance supercapacitors. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.