Fe2O3 Nanostructures on Carbon Fabric as Anode Material for High Performance Asymmetric Supercapacitors

Supercapacitors (SCs) with asymmetric electrodes structure provide an effective approach to improve the energy density of SCs. We reported a novel anode material based on Fe2O3 nanoflakes grown on carbon fabric which exhibited a high specific capacitance of similar to 386 F/g. To fabricate asymmetric supercapacitors (ASCs), Fe2O3 nanoflakes negative electrodes and MnO2 positive electrodes were assembled together with a separator sandwiched between them. The fabricated ASCs showed a stable performance over a wide voltage range (0-1.6 V) and a high specific capacitance (510 F/g) with high areal capacitance (210 mF/cm(2)). At the meanwhile, a high energy density of 45.3 Wh/kg could be achieved. The fabricated ASCs demonstrated their great potential in energy storage for next-generation hybrid electrical vehicles and other consumer electronics.