The fabrication schematic diagram of FeCo-selenide//Fe2O3 asymmetric supercapacitor (ASC). The FeCo-selenide and Fe2O3 electrodes serve as positive and negative electrodes respectively that both show excellent electrochemical performance. In addition, the fabricated ASC was connected to form a series circuit to light the "CUMT" board, which can be viewed as a promising candidate for large scale hybrid devices applications.