MnO2　nanorods/graphene　composite　materials　have　been　fabricated　using　a　facile　hydrothermal　method　for　supercapacitor　applications.　The　prepared　composite　materials　are　characterized　by　means　of　X-ray　diffraction　(XRD),　Fourier　transform　infrared　spectroscopy　(FT-IR),　scanning　electron　microscopy　(SEM)　and　transmission　electron　microscope　(TEM).　Electrochemical　performances　are　evaluated　using　cyclic　voltammetry　(CV),　galvanostatic　charge-discharge　and　electrochemical　impedance　spectrometry　(EIS).　It　indicates　that　ratio　of　MnO2　nanorods　to　graphene　in　composite　materials　has　significant　influence　on　the　electrochemical　performance　of　composite　electrodes.　We　have　achieved　the　maximum　specific　capacitance　of　218　Fg(-1)　at　the　scan　rate　of　5　mV　s(-1)　in　1M　Na2SO4　aqueous　solution.　Additionally,　MnO2　nanorods/graphene　composite　materials　exhibit　highest　energy　density　of　16　Wh　kg(-1)　at　power　density　of　95W　kg(-1)　and　excellent　capacitance　retention　with　no　more　than　6%　capacitance　loss　after　1000　cycles　at　the　most　favorable　composites　ratio.　(C)　2013　Elsevier　Ltd.　All　rights　reserved.