Binder-free three-dimensional high energy density electrodes for ionic-liquid supercapacitorsElectronic supplementary information (ESI) available. See DOI: 10.1039/c5cc04359j

We demonstrate a facile methodology to fabricate binder-free porous carbon nanofiber electrodes for room temperature ionic-liquid supercapacitors. The device provides an energy density of 80 W h kg −1 based on the mass of two electrodes while retaining the high rate capability of supercapacitors with near-ideal CV curves at a high scan rate of 200 mV s −1 . We demonstrate a facile methodology to fabricate binder-free porous carbon nanofiber electrodes for room temperature ionic-liquid supercapacitors.