In this work, the novel hierarchical FeCo2O4@MnO2 core-shell nanosheet arrays have been synthesized by a facile hydrothermal method, which are grown directly on a flexible carbon fiber (CF) as an integrated electrode for supercapacitors. Scanning electron microscopy and high-resolution transmission electron microscopy measurements illustrate that MnO2 nanoflakes uniformly wrap around the surface of two-dimensional FeCo2O4 nanosheets. The electrode exhibits high areal capacitance of 4.8 F cm(-2) at a current density of 1 mA cm(-2). Moreover, an asymmetric FeCo2O4@MnO2//active carbon (AC) cell is successfully fabricated. The asymmetric supercapacitor (ASC) displays high energy density/power density (22.68 W h kg(-1) at 406.01 W kri and 7.06 W h kg(-1) at 1802.5 W kg(-1)), as well as excellent cycling stability with 90.1% of the initial capacitance after 5000 continuous cycles. Moreover, two ASCs connected in series can light a LED. These performances demonstrate great potential of the designed ASC in the field of energy storage due to their remarkable electrochemical properties. (C) 2017 Published by Elsevier Inc.