Advanced negative electrode of Fe2O3/graphene oxide paper for high energy supercapacitors. (December 2017) - Xie, Shilei
Graphical abstract: Highlights: Novel Fe2 O3 /GP (graphene paper) negative electrode for supercapacitors was prepared. The capacitance of Fe2 O3 /GP was ∼3.08 F cm −2 at the density of 5 mA cm −2 . The Fe2 O3 /GP also showed good stability in long-term cyclic process. Abstract: The development of Fe2 O3 with high conductivity and energy density is crucial for practical utilizations of supercapacitors. Here, we demonstrated the preparation of novel Fe2 O3 /graphene oxide paper (Fe2 O3 /GP) hybrid electrode for high density supercapacitors. Due to the characteristic features of large surface areas and fast electron transportation, the specific areal capacitance of the Fe2 O3 /GP was around 3.08 F cm −2 at the charge-discharge current density of 5 mA cm −2, which is nearly 14 times of the Fe2 O3 /carbon paper (Fe2 O3 /CP, 0.22 F cm −2 ). More importantly, the Fe2 O3 /GP hybrid electrode also retained about 95% of the initial capacitance after long-term cyclic process. These findings would help us to develop high effective and stable materials for energy storage devices.