Fe2O3/MgFe2O4 Nanosheet on Nickel Foam for High-Performance Asymmetric Supercapacitors

In this paper, the effects of nickel foam with different thicknesses, as a fluid collector, on the morphology and properties of electrode materials were explored. The Fe2O3 material, which is a common active material for supercapacitor electrodes, was used in combination with MgFe2O4. This combination resulted in better electrochemical performance and cycle stability for the Fe2O3 material. The synthesis ratio of Fe2O3/MgFe2O4 materials with the best stability, as reported in a previous article, was selected for this study. The electrode with the best performance was then selected and assembled with activated carbon to form an asymmetric supercapacitor. This supercapacitor exhibited a high specific capacity of 240 C/g, an energy density of 58.75 Wh/kg, and a power density of 200.4 W/kg at a current density of 1 A/g. These findings provide valuable references for the selection of different fluid collectors with electrodes.