Template-free and direct-grown poly(3,4-ethylenedioxythiophene) nanowires/carbon cloth (PEDOT-NWs/CC) nanocomposite is successfully fabricated via electrochemical polymerization for hierarchical supercapacitor electrodes in neutral aqueous electrolyte of Na2SO4. The uniform distribution of PEDOT-NWs with 60-80 nm in diameter and several microns in length, and their-characteristics of infrared absorption are determined by SEM and FTIR, respectively. The electrochemical impedance analysis is performed to probe the diffusion characteristics of PEDOT-NWs/CC electrode. Moreover, high gravimetric capacitance of 256.1 F g(-1) at a specific energy of 182.1 Wh kg(-1) and a specific power of 13.1 kW kg(-1) is obtained under a wide operated potential of 1.6 V. These results clearly present a cost-effective and simple method of fabrication of the nanostructured polymers with enormous potential in flexible energy storage device applications. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.