A facile method has been developed to prepare flexible and uniform porous carbon film/Ni (PCF/Ni) double-layer structure for simply and rapidly assembling flexible electrochemical capacitor (EC). The PCF/Ni is obtained by ambient pressure chemical vapor deposition and subsequent partial etching of Ni foil. The thickness of PCF can be controlled by etching time. The PCF has a porous structure and tightly interface with Ni, resulting in a good conductivity and large surface area. The ECs based on PCF/Ni exhibits good electrical properties. Area (volumetric) capacitance of PCF/Ni electrode with PCF thickness of 0.52 mu m reaches 031 mF/cm(2) (5.96 F/cm(3)) at scan rate of 50 mV/s. Maximum volumetric (gravimetric) power density reaches 2.72 W/cm(3) (9.05 kW/kg). The performance can be further improved by increasing the PCF thickness. Furthermore, the EC based on PCF/Ni has a very short time constant (similar to 170 mu s) and allows for operations at high rate up to 500 V/s. (C) 2016 Elsevier B.V. All rights reserved.