Cycling stability of FeO nanosheets as supercapacitor sheet electrodes enhanced by MgFeO nanoparticles.

The FeO material is a common active material for supercapacitor electrodes and has received much attention due to its cheap and easy availability and high initial specific capacitance. In the present study, we prepared adhesive-free FeO sheet electrodes for supercapacitors by growing FeO material on nickel foam by hydrothermal method. The sheet electrode exhibited a high initial specific capacitance of 863 F g, but we found that the sheet lost its specific capacitance too quickly through cyclic stability tests.

Experimental study on the degradation mechanism of LaCoO-based symmetric supercapacitors.

In this paper, LaCoO powders were prepared by the urea combustion method and used as electrode materials for supercapacitors. The effect of the potential window and the current density on the performance degradation of LaCoO electrodes during the cycling test was analyzed. The degradation mechanism of LaCoO-based symmetric supercapacitors was discussed.