▎ 摘　　要

MnFe2O4/graphene nanocomposite is synthesized and demonstrated as promising anode material for asymmetric supercapacitors. An asymmetric supercapacitor operating at 1.8 V is fabricated using MnFe2O4/graphene as anode and MnO2/carbon nanotube as cathode. The asymmetric supercapacitor shows an energy density of 25.9 Wh kg(-1) at a power density of 225W kg(-1) and an energy density of 18.1 Wh kg(-1) at a power density of 14.4 kW kg(-1), indicating an excellent power capability. (c) 2014 Elsevier B.V. All rights reserved.