title: High-performance supercapacitors using graphene/polyaniline composites deposited on kitchen sponge.
abstract: We in this study used a commercial grade kitchen sponge as the scaffold where both graphene platelets (GnPs) and polyaniline (PANi) nanorods were deposited. The high electrical conductivity of GnPs (1460 S cm(-1)) enhances the pseudo-capacitive performance of PANi grown vertically on the GnPs basal planes; the interconnected pores of the sponge provide sufficient inner surface between the GnPs/PANi composite and the electrolyte, which thus facilitates ion diffusion during charge and discharge processes. When the composite electrode was used to build a supercapacitor with two-electrode configuration, it exhibited a specific capacitance of 965.3 F g(-1) at a scan rate of 10 mV s(-1) in 1.0 M H2SO4 solution. In addition, the composite Nyquist plot showed no semicircle at high frequency corresponding to a low equivalent series resistance of 0.35 Ω. At 100 mV s(-1), the supercapacitor demonstrated an energy density of 34.5 Wh kg(-1) and a power density of 12.4 kW kg(-1) based on the total mass of the active materials on both electrodes. To demonstrate the performance, we built an array consisting of three cells connected in series, which lit up a red light emitting diode for five minutes. This simple method holds promise for high-performance yet low-cost electrodes for supercapacitors.
authors.affiliation: Mawson Institute and School of Engineering, University of South Australia, Mawson Lakes SA5095, Australia. Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62111, Egypt.
authors.forename: Mahmoud
authors.initials: M
authors.lastname: Moussa
authors.forename: Maher F
authors.initials: MF
authors.lastname: El-Kady
authors.forename: Hao
authors.initials: H
authors.lastname: Wang
authors.forename: Andrew
authors.initials: A
authors.lastname: Michimore
authors.forename: Qinqin
authors.initials: Q
authors.lastname: Zhou
authors.forename: Jian
authors.initials: J
authors.lastname: Xu
authors.forename: Peter
authors.initials: P
authors.lastname: Majeswki
authors.forename: Jun
authors.initials: J
authors.lastname: Ma